--- /dev/null
+/* Tags file maker to go with GNU Emacs
+ Copyright (C) 1984, 87, 88, 89, 93, 94, 95
+ Free Software Foundation, Inc. and Ken Arnold
+
+This file is not considered part of GNU Emacs.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software Foundation,
+Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+/*
+ * Authors:
+ * Ctags originally by Ken Arnold.
+ * Fortran added by Jim Kleckner.
+ * Ed Pelegri-Llopart added C typedefs.
+ * Gnu Emacs TAGS format and modifications by RMS?
+ * Sam Kendall added C++.
+ * Francesco Potorti` reorganised C and C++ based on work by Joe Wells.
+ * Regexp tags by Tom Tromey.
+ *
+ * Francesco Potorti` (F.Potorti@cnuce.cnr.it) is the current maintainer.
+ */
+
+char pot_etags_version[] = "@(#) pot revision number is 12.28";
+
+/* Prototyping magic snarfed from gmalloc.c */
+#if defined (__cplusplus) || defined (__STDC__)
+#undef PP
+#define PP(args) args
+#undef __ptr_t
+#define __ptr_t void *
+#else /* Not C++ or ANSI C. */
+#undef PP
+#define PP(args) ()
+#undef const
+#define const
+#undef __ptr_t
+#define __ptr_t char *
+#endif /* C++ or ANSI C. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+ /* On some systems, Emacs defines static as nothing for the sake
+ of unexec. We don't want that here since we don't use unexec. */
+# undef static
+# define ETAGS_REGEXPS /* use the regexp features */
+# define LONG_OPTIONS /* accept long options */
+#endif /* HAVE_CONFIG_H */
+
+#define TRUE 1
+#define FALSE 0
+
+#ifndef DEBUG
+# define DEBUG FALSE
+#endif
+
+#ifdef MSDOS
+# include <fcntl.h>
+# include <sys/param.h>
+# include <io.h>
+# ifndef HAVE_CONFIG_H
+# define DOS_NT
+# include <sys/config.h>
+# endif
+#endif /* MSDOS */
+
+#ifdef WINDOWSNT
+# include <stdlib.h>
+# include <fcntl.h>
+# include <string.h>
+# include <io.h>
+# define MAXPATHLEN _MAX_PATH
+# ifdef HAVE_CONFIG_H
+# undef HAVE_NTGUI
+# else
+# define DOS_NT
+# define HAVE_GETCWD
+# endif /* not HAVE_CONFIG_H */
+#endif /* WINDOWSNT */
+
+#if !defined (WINDOWSNT) && defined (STDC_HEADERS)
+#include <stdlib.h>
+#include <string.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#else
+# ifdef HAVE_GETCWD
+ extern char *getcwd ();
+# endif
+#endif /* HAVE_UNISTD_H */
+
+#include <stdio.h>
+#include <ctype.h>
+#include <errno.h>
+#ifndef errno
+ extern int errno;
+#endif
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#if !defined (S_ISREG) && defined (S_IFREG)
+# define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
+#endif
+
+#ifdef LONG_OPTIONS
+# include <getopt.h>
+#else
+# define getopt_long(argc,argv,optstr,lopts,lind) getopt (argc, argv, optstr)
+ extern char *optarg;
+ extern int optind, opterr;
+#endif /* LONG_OPTIONS */
+
+#ifdef ETAGS_REGEXPS
+# include <regex.h>
+#endif /* ETAGS_REGEXPS */
+
+/* Define CTAGS to make the program "ctags" compatible with the usual one.
+ Leave it undefined to make the program "etags", which makes emacs-style
+ tag tables and tags typedefs, #defines and struct/union/enum by default. */
+#ifdef CTAGS
+# undef CTAGS
+# define CTAGS TRUE
+#else
+# define CTAGS FALSE
+#endif
+
+/* Exit codes for success and failure. */
+#ifdef VMS
+# define GOOD 1
+# define BAD 0
+#else
+# define GOOD 0
+# define BAD 1
+#endif
+
+/* C extensions. */
+#define C_PLPL 0x00001 /* C++ */
+#define C_STAR 0x00003 /* C* */
+#define C_JAVA 0x00005 /* JAVA */
+#define YACC 0x10000 /* yacc file */
+
+#define streq(s,t) ((DEBUG && (s) == NULL && (t) == NULL \
+ && (abort (), 1)) || !strcmp (s, t))
+#define strneq(s,t,n) ((DEBUG && (s) == NULL && (t) == NULL \
+ && (abort (), 1)) || !strncmp (s, t, n))
+
+#define lowcase(c) tolower ((char)c)
+
+#define CHARS 256 /* 2^sizeof(char) */
+#define CHAR(x) ((unsigned int)x & (CHARS - 1))
+#define iswhite(c) (_wht[CHAR(c)]) /* c is white */
+#define notinname(c) (_nin[CHAR(c)]) /* c is not in a name */
+#define begtoken(c) (_btk[CHAR(c)]) /* c can start token */
+#define intoken(c) (_itk[CHAR(c)]) /* c can be in token */
+#define endtoken(c) (_etk[CHAR(c)]) /* c ends tokens */
+
+/*#ifdef INFODOCK*/
+/*#undef OO_BROWSER*/
+/* Due to the way this file is constructed, this unfortunately doesn't */
+/* work except for documentation purposes. -slb */
+#define OO_BROWSER 1
+/*#endif*/
+
+#ifdef OO_BROWSER
+#define set_construct(construct) \
+ if (!oo_browser_construct) oo_browser_construct = construct
+void oo_browser_clear_all_globals();
+void oo_browser_clear_some_globals();
+void oo_browser_check_and_clear_structtype();
+#endif
+
+/*
+ * xnew, xrnew -- allocate, reallocate storage
+ *
+ * SYNOPSIS: Type *xnew (int n, Type);
+ * Type *xrnew (OldPointer, int n, Type);
+ */
+#ifdef chkmalloc
+# include "chkmalloc.h"
+# define xnew(n,Type) ((Type *) trace_malloc (__FILE__, __LINE__, \
+ (n) * sizeof (Type)))
+# define xrnew(op,n,Type) ((Type *) trace_realloc (__FILE__, __LINE__, \
+ (op), (n) * sizeof (Type)))
+#else
+# define xnew(n,Type) ((Type *) xmalloc ((n) * sizeof (Type)))
+# define xrnew(op,n,Type) ((Type *) xrealloc ((op), (n) * sizeof (Type)))
+#endif
+
+typedef int bool;
+
+typedef void Lang_function ();
+
+typedef struct
+{
+ char *name;
+ Lang_function *function;
+ char **suffixes;
+ char **interpreters;
+} language;
+
+typedef struct node_st
+{ /* sorting structure */
+ char *name; /* function or type name */
+#ifdef OO_BROWSER
+ short int construct; /* Construct type for the OO-Browser */
+#endif
+ char *file; /* file name */
+ bool is_func; /* use pattern or line no */
+ bool been_warned; /* set if noticed dup */
+ int lno; /* line number tag is on */
+ long cno; /* character number line starts on */
+ char *pat; /* search pattern */
+ struct node_st *left, *right; /* left and right sons */
+} node;
+
+#ifdef OO_BROWSER
+/* If you add to this array, you must add a corresponding entry to the
+ following enum. */
+static char *oo_browser_default_classes[] =
+ /* Lack of square brackets around some of these entries are intentional. */
+ {"null", "class", "method", "[constant]", "[enumeration]", "[enum_label]",
+ "extern", "[function]", "[macro]", "objc", "[structure]", "[type]",
+ "[union]", "[variable]"};
+
+/* If you add to this enum, you must add a corresponding entry to the
+ preceding array. */
+enum oo_browser_constructs {C_NULL, C_CLASS, C_METHOD, C_CONSTANT, C_ENUMERATION,
+ C_ENUM_LABEL, C_EXTERN, C_FUNCTION, C_MACRO,
+ C_OBJC, C_STRUCTURE, C_TYPE, C_UNION, C_VARIABLE};
+
+enum oo_browser_constructs oo_browser_construct = C_NULL;
+#endif
+
+/*
+ * A `linebuffer' is a structure which holds a line of text.
+ * `readline_internal' reads a line from a stream into a linebuffer
+ * and works regardless of the length of the line.
+ * SIZE is the size of BUFFER, LEN is the length of the string in
+ * BUFFER after readline reads it.
+ */
+typedef struct
+{
+ long size;
+ int len;
+ char *buffer;
+} linebuffer;
+
+extern char *getenv PP ((const char *envvar));
+
+/* Many compilers barf on this:
+ Lang_function Asm_labels;
+ so let's write it this way */
+void Asm_labels PP ((FILE *inf));
+void C_entries PP ((int c_ext, FILE *inf));
+void default_C_entries PP ((FILE *inf));
+void plain_C_entries PP ((FILE *inf));
+void Cjava_entries PP ((FILE *inf));
+void Cplusplus_entries PP ((FILE *inf));
+void Yacc_entries PP ((FILE *inf));
+void Cobol_paragraphs PP ((FILE *inf));
+void Cstar_entries PP ((FILE *inf));
+void Erlang_functions PP ((FILE *inf));
+void Fortran_functions PP ((FILE *inf));
+void Lisp_functions PP ((FILE *inf));
+void Pascal_functions PP ((FILE *inf));
+void Perl_functions PP ((FILE *inf));
+void Postscript_functions PP ((FILE *inf));
+void Prolog_functions PP ((FILE *inf));
+void Python_functions PP ((FILE *inf));
+void Scheme_functions PP ((FILE *inf));
+void TeX_functions PP ((FILE *inf));
+void just_read_file PP ((FILE *inf));
+
+void print_language_names PP ((void));
+void print_version PP ((void));
+void print_help PP ((void));
+
+language *get_language_from_name PP ((char *name));
+language *get_language_from_interpreter PP ((char *interpreter));
+language *get_language_from_suffix PP ((char *suffix));
+int total_size_of_entries PP ((node *np));
+long readline PP ((linebuffer *lbp, FILE *stream));
+long readline_internal PP ((linebuffer *lbp, FILE *stream));
+#ifdef ETAGS_REGEXPS
+void analyse_regex PP ((char *regex_arg));
+void add_regex PP ((char *regexp_pattern, language *lang));
+void free_patterns PP ((void));
+#endif /* ETAGS_REGEXPS */
+void error PP ((const char *s1, const char *s2));
+void suggest_asking_for_help PP ((void));
+void fatal PP ((char *s1, char *s2));
+void pfatal PP ((char *s1));
+void add_node PP ((node *np, node **cur_node_p));
+
+void init PP ((void));
+void initbuffer PP ((linebuffer *lbp));
+void find_entries PP ((char *file, FILE *inf));
+void free_tree PP ((node *np));
+void pfnote PP ((char *name, bool is_func, char *linestart, int linelen, int lno, long cno));
+void new_pfnote PP ((char *name, int namelen, bool is_func, char *linestart, int linelen, int lno, long cno));
+void process_file PP ((char *file));
+void put_entries PP ((node *np));
+void takeprec PP ((void));
+
+char *concat PP ((char *s1, char *s2, char *s3));
+char *skip_spaces PP ((char *cp));
+char *skip_non_spaces PP ((char *cp));
+char *savenstr PP ((char *cp, int len));
+char *savestr PP ((char *cp));
+char *etags_strchr PP ((char *sp, int c));
+char *etags_strrchr PP ((char *sp, int c));
+char *etags_getcwd PP ((void));
+char *relative_filename PP ((char *file, char *dir));
+char *absolute_filename PP ((char *file, char *dir));
+char *absolute_dirname PP ((char *file, char *dir));
+bool filename_is_absolute PP ((char *fn));
+void canonicalize_filename PP ((char *fn));
+void grow_linebuffer PP ((linebuffer *lbp, int toksize));
+long *xmalloc PP ((unsigned int size));
+long *xrealloc PP ((char *ptr, unsigned int size));
+
+\f
+char searchar = '/'; /* use /.../ searches */
+
+char *tagfile; /* output file */
+char *progname; /* name this program was invoked with */
+char *cwd; /* current working directory */
+char *tagfiledir; /* directory of tagfile */
+FILE *tagf; /* ioptr for tags file */
+
+char *curfile; /* current input file name */
+language *curlang; /* current language */
+
+int lineno; /* line number of current line */
+long charno; /* current character number */
+long linecharno; /* charno of start of current line */
+char *dbp; /* pointer to start of current tag */
+node *head; /* the head of the binary tree of tags */
+
+linebuffer lb; /* the current line */
+linebuffer token_name; /* used by C_entries as a temporary area */
+struct
+{
+ long linepos;
+ linebuffer lb; /* used by C_entries instead of lb */
+} lbs[2];
+
+/* boolean "functions" (see init) */
+bool _wht[CHARS], _nin[CHARS], _itk[CHARS], _btk[CHARS], _etk[CHARS];
+char
+ /* white chars */
+ *white = " \f\t\n\r",
+ /* not in a name */
+ *nonam = " \f\t\n\r(=,[;",
+ /* token ending chars */
+ *endtk = " \t\n\r\"'#()[]{}=-+%*/&|^~!<>;,.:?",
+ /* token starting chars */
+ *begtk = "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz$~@",
+ /* valid in-token chars */
+ *midtk = "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz$0123456789";
+
+bool append_to_tagfile; /* -a: append to tags */
+/* The following four default to TRUE for etags, but to FALSE for ctags. */
+bool typedefs; /* -t: create tags for C typedefs */
+bool typedefs_and_cplusplus; /* -T: create tags for C typedefs, level */
+ /* 0 struct/enum/union decls, and C++ */
+ /* member functions. */
+bool constantypedefs; /* -d: create tags for C #define, enum */
+ /* constants and variables. */
+ /* -D: opposite of -d. Default under ctags. */
+bool globals; /* create tags for global variables */
+bool members; /* create tags for C member variables */
+bool update; /* -u: update tags */
+bool vgrind_style; /* -v: create vgrind style index output */
+bool no_warnings; /* -w: suppress warnings */
+bool cxref_style; /* -x: create cxref style output */
+bool cplusplus; /* .[hc] means C++, not C */
+bool noindentypedefs; /* -I: ignore indentation in C */
+#ifdef OO_BROWSER
+bool oo_browser_format; /* -O: OO-Browser tags format */
+#endif
+
+#ifdef LONG_OPTIONS
+struct option longopts[] =
+{
+ { "append", no_argument, NULL, 'a' },
+ { "backward-search", no_argument, NULL, 'B' },
+ { "c++", no_argument, NULL, 'C' },
+ { "cxref", no_argument, NULL, 'x' },
+ { "defines", no_argument, NULL, 'd' },
+ { "no-defines", no_argument, NULL, 'D' },
+ { "globals", no_argument, &globals, TRUE },
+ { "no-globals", no_argument, &globals, FALSE },
+ { "help", no_argument, NULL, 'h' },
+ { "help", no_argument, NULL, 'H' },
+ { "ignore-indentation", no_argument, NULL, 'I' },
+ { "include", required_argument, NULL, 'i' },
+ { "language", required_argument, NULL, 'l' },
+ { "members", no_argument, &members, TRUE },
+ { "no-members", no_argument, &members, FALSE },
+ { "no-warn", no_argument, NULL, 'w' },
+ { "output", required_argument, NULL, 'o' },
+#ifdef OO_BROWSER
+ { "oo-browser", no_argument, NULL, 'O' },
+#endif
+#ifdef ETAGS_REGEXPS
+ { "regex", required_argument, NULL, 'r' },
+ { "no-regex", no_argument, NULL, 'R' },
+#endif /* ETAGS_REGEXPS */
+ { "typedefs", no_argument, NULL, 't' },
+ { "typedefs-and-c++", no_argument, NULL, 'T' },
+ { "update", no_argument, NULL, 'u' },
+ { "version", no_argument, NULL, 'V' },
+ { "vgrind", no_argument, NULL, 'v' },
+ { 0 }
+};
+#endif /* LONG_OPTIONS */
+
+#ifdef ETAGS_REGEXPS
+/* Structure defining a regular expression. Elements are
+ the compiled pattern, and the name string. */
+typedef struct pattern
+{
+ struct pattern *p_next;
+ language *language;
+ char *regex;
+ struct re_pattern_buffer *pattern;
+ struct re_registers regs;
+ char *name_pattern;
+ bool error_signaled;
+} pattern;
+
+/* Array of all regexps. */
+pattern *p_head = NULL;
+#endif /* ETAGS_REGEXPS */
+
+/*
+ * Language stuff.
+ */
+
+/* Non-NULL if language fixed. */
+language *forced_lang = NULL;
+
+/* Assembly code */
+char *Asm_suffixes [] = { "a", /* Unix assembler */
+ "asm", /* Microcontroller assembly */
+ "def", /* BSO/Tasking definition includes */
+ "inc", /* Microcontroller include files */
+ "ins", /* Microcontroller include files */
+ "s", "sa", /* Unix assembler */
+ "src", /* BSO/Tasking C compiler output */
+ NULL
+ };
+
+/* Note that .c and .h can be considered C++, if the --c++ flag was
+ given. That is why default_C_entries is called here. */
+char *default_C_suffixes [] =
+ { "c", "h", NULL };
+
+char *Cplusplus_suffixes [] =
+ { "C", "H", "c++", "cc", "cpp", "cxx", "h++", "hh", "hpp", "hxx",
+ "M", /* Objective C++ */
+ "pdb", /* Postscript with C syntax */
+ NULL };
+
+char *Cjava_suffixes [] =
+ { "java", NULL };
+
+char *Cobol_suffixes [] =
+ { "COB", "cob", NULL };
+
+char *Cstar_suffixes [] =
+ { "cs", "hs", NULL };
+
+char *Erlang_suffixes [] =
+ { "erl", "hrl", NULL };
+
+char *Fortran_suffixes [] =
+ { "F", "f", "f90", "for", NULL };
+
+char *Lisp_suffixes [] =
+ { "cl", "clisp", "el", "l", "lisp", "lsp", "ml", NULL };
+
+char *Pascal_suffixes [] =
+ { "p", "pas", NULL };
+
+char *Perl_suffixes [] =
+ { "pl", "pm", NULL };
+char *Perl_interpreters [] =
+ { "perl", "@PERL@", NULL };
+
+char *plain_C_suffixes [] =
+ { "pc", /* Pro*C file */
+ "m", /* Objective C file */
+ "lm", /* Objective lex file */
+ NULL };
+
+char *Postscript_suffixes [] =
+ { "ps", NULL };
+
+char *Prolog_suffixes [] =
+ { "prolog", NULL };
+
+char *Python_suffixes [] =
+ { "py", NULL };
+
+/* Can't do the `SCM' or `scm' prefix with a version number. */
+char *Scheme_suffixes [] =
+ { "SCM", "SM", "oak", "sch", "scheme", "scm", "sm", "ss", "t", NULL };
+
+char *TeX_suffixes [] =
+ { "TeX", "bib", "clo", "cls", "ltx", "sty", "tex", NULL };
+
+char *Yacc_suffixes [] =
+ { "y", "ym", NULL }; /* .ym is Objective yacc file */
+
+/*
+ * Table of languages.
+ *
+ * It is ok for a given function to be listed under more than one
+ * name. I just didn't.
+ */
+
+language lang_names [] =
+{
+ { "asm", Asm_labels, Asm_suffixes, NULL },
+ { "c", default_C_entries, default_C_suffixes, NULL },
+ { "c++", Cplusplus_entries, Cplusplus_suffixes, NULL },
+ { "c*", Cstar_entries, Cstar_suffixes, NULL },
+ { "cobol", Cobol_paragraphs, Cobol_suffixes, NULL },
+ { "erlang", Erlang_functions, Erlang_suffixes, NULL },
+ { "fortran", Fortran_functions, Fortran_suffixes, NULL },
+ { "java", Cjava_entries, Cjava_suffixes, NULL },
+ { "lisp", Lisp_functions, Lisp_suffixes, NULL },
+ { "pascal", Pascal_functions, Pascal_suffixes, NULL },
+ { "perl", Perl_functions, Perl_suffixes, Perl_interpreters },
+ { "postscript", Postscript_functions, Postscript_suffixes, NULL },
+ { "proc", plain_C_entries, plain_C_suffixes, NULL },
+ { "prolog", Prolog_functions, Prolog_suffixes, NULL },
+ { "python", Python_functions, Python_suffixes, NULL },
+ { "scheme", Scheme_functions, Scheme_suffixes, NULL },
+ { "tex", TeX_functions, TeX_suffixes, NULL },
+ { "yacc", Yacc_entries, Yacc_suffixes, NULL },
+ { "auto", NULL }, /* default guessing scheme */
+ { "none", just_read_file }, /* regexp matching only */
+ { NULL, NULL } /* end of list */
+};
+
+\f
+void
+print_language_names ()
+{
+ language *lang;
+ char **ext;
+
+ puts ("\nThese are the currently supported languages, along with the\n\
+default file name suffixes:");
+ for (lang = lang_names; lang->name != NULL; lang++)
+ {
+ printf ("\t%s\t", lang->name);
+ if (lang->suffixes != NULL)
+ for (ext = lang->suffixes; *ext != NULL; ext++)
+ printf (" .%s", *ext);
+ puts ("");
+ }
+ puts ("Where `auto' means use default language for files based on file\n\
+name suffix, and `none' means only do regexp processing on files.\n\
+If no language is specified and no matching suffix is found,\n\
+the first line of the file is read for a sharp-bang (#!) sequence\n\
+followed by the name of an interpreter. If no such sequence is found,\n\
+Fortran is tried first; if no tags are found, C is tried next.");
+}
+
+#ifndef VERSION
+# define VERSION "20"
+#endif
+void
+print_version ()
+{
+ printf ("%s (GNU Emacs %s)\n", (CTAGS) ? "ctags" : "etags", VERSION);
+ puts ("Copyright (C) 1996 Free Software Foundation, Inc. and Ken Arnold");
+ puts ("This program is distributed under the same terms as Emacs");
+
+ exit (GOOD);
+}
+
+void
+print_help ()
+{
+ printf ("Usage: %s [options] [[regex-option ...] file-name] ...\n\
+\n\
+These are the options accepted by %s.\n", progname, progname);
+#ifdef LONG_OPTIONS
+ puts ("You may use unambiguous abbreviations for the long option names.");
+#else
+ puts ("Long option names do not work with this executable, as it is not\n\
+linked with GNU getopt.");
+#endif /* LONG_OPTIONS */
+ puts ("A - as file name means read names from stdin (one per line).");
+ if (!CTAGS)
+ printf (" Absolute names are stored in the output file as they are.\n\
+Relative ones are stored relative to the output file's directory.");
+ puts ("\n");
+
+ puts ("-a, --append\n\
+ Append tag entries to existing tags file.");
+
+ if (CTAGS)
+ puts ("-B, --backward-search\n\
+ Write the search commands for the tag entries using '?', the\n\
+ backward-search command instead of '/', the forward-search command.");
+
+ puts ("-C, --c++\n\
+ Treat files whose name suffix defaults to C language as C++ files.");
+
+ if (CTAGS)
+ puts ("-d, --defines\n\
+ Create tag entries for C #define constants and enum constants, too.");
+ else
+ puts ("-D, --no-defines\n\
+ Don't create tag entries for C #define constants and enum constants.\n\
+ This makes the tags file smaller.");
+
+ if (!CTAGS)
+ {
+ puts ("-i FILE, --include=FILE\n\
+ Include a note in tag file indicating that, when searching for\n\
+ a tag, one should also consult the tags file FILE after\n\
+ checking the current file.");
+ puts ("-l LANG, --language=LANG\n\
+ Force the following files to be considered as written in the\n\
+ named language up to the next --language=LANG option.");
+ }
+
+ if (CTAGS)
+ puts ("--globals\n\
+ Create tag entries for global variables in some languages.");
+ else
+ puts ("--no-globals\n\
+ Do not create tag entries for global variables in some\n\
+ languages. This makes the tags file smaller.");
+ puts ("--members\n\
+ Create tag entries for member variables in C and derived languages.");
+
+#ifdef ETAGS_REGEXPS
+ puts ("-r /REGEXP/, --regex=/REGEXP/ or --regex=@regexfile\n\
+ Make a tag for each line matching pattern REGEXP in the\n\
+ following files. regexfile is a file containing one REGEXP\n\
+ per line. REGEXP is anchored (as if preceded by ^).\n\
+ The form /REGEXP/NAME/ creates a named tag. For example Tcl\n\
+ named tags can be created with:\n\
+ --regex=/proc[ \\t]+\\([^ \\t]+\\)/\\1/.");
+ puts ("-R, --no-regex\n\
+ Don't create tags from regexps for the following files.");
+#endif /* ETAGS_REGEXPS */
+ puts ("-o FILE, --output=FILE\n\
+ Write the tags to FILE.");
+#ifdef OO_BROWSER
+ puts ("-O, --oo-browser\n\
+ Generate a specialized tags format used only by the Altrasoft OO-Browser.");
+#endif
+ puts ("-I, --ignore-indentation\n\
+ Don't rely on indentation quite as much as normal. Currently,\n\
+ this means not to assume that a closing brace in the first\n\
+ column is the final brace of a function or structure\n\
+ definition in C and C++.");
+
+ if (CTAGS)
+ {
+ puts ("-t, --typedefs\n\
+ Generate tag entries for C typedefs.");
+ puts ("-T, --typedefs-and-c++\n\
+ Generate tag entries for C typedefs, C struct/enum/union tags,\n\
+ and C++ member functions.");
+ puts ("-u, --update\n\
+ Update the tag entries for the given files, leaving tag\n\
+ entries for other files in place. Currently, this is\n\
+ implemented by deleting the existing entries for the given\n\
+ files and then rewriting the new entries at the end of the\n\
+ tags file. It is often faster to simply rebuild the entire\n\
+ tag file than to use this.");
+ puts ("-v, --vgrind\n\
+ Generates an index of items intended for human consumption,\n\
+ similar to the output of vgrind. The index is sorted, and\n\
+ gives the page number of each item.");
+ puts ("-w, --no-warn\n\
+ Suppress warning messages about entries defined in multiple\n\
+ files.");
+ puts ("-x, --cxref\n\
+ Like --vgrind, but in the style of cxref, rather than vgrind.\n\
+ The output uses line numbers instead of page numbers, but\n\
+ beyond that the differences are cosmetic; try both to see\n\
+ which you like.");
+ }
+
+ puts ("-V, --version\n\
+ Print the version of the program.\n\
+-h, --help\n\
+ Print this help message.");
+
+ print_language_names ();
+
+ puts ("");
+ puts ("Report bugs to bug-gnu-emacs@prep.ai.mit.edu");
+
+ exit (GOOD);
+}
+
+\f
+enum argument_type
+{
+ at_language,
+ at_regexp,
+ at_filename
+};
+
+/* This structure helps us allow mixing of --lang and file names. */
+typedef struct
+{
+ enum argument_type arg_type;
+ char *what;
+ language *lang;
+} argument;
+
+#ifdef VMS /* VMS specific functions */
+
+#define EOS '\0'
+
+/* This is a BUG! ANY arbitrary limit is a BUG!
+ Won't someone please fix this? */
+#define MAX_FILE_SPEC_LEN 255
+typedef struct {
+ short curlen;
+ char body[MAX_FILE_SPEC_LEN + 1];
+} vspec;
+
+/*
+ v1.05 nmm 26-Jun-86 fn_exp - expand specification of list of file names
+ returning in each successive call the next file name matching the input
+ spec. The function expects that each in_spec passed
+ to it will be processed to completion; in particular, up to and
+ including the call following that in which the last matching name
+ is returned, the function ignores the value of in_spec, and will
+ only start processing a new spec with the following call.
+ If an error occurs, on return out_spec contains the value
+ of in_spec when the error occurred.
+
+ With each successive file name returned in out_spec, the
+ function's return value is one. When there are no more matching
+ names the function returns zero. If on the first call no file
+ matches in_spec, or there is any other error, -1 is returned.
+*/
+
+#include <rmsdef.h>
+#include <descrip.h>
+#define OUTSIZE MAX_FILE_SPEC_LEN
+short
+fn_exp (out, in)
+ vspec *out;
+ char *in;
+{
+ static long context = 0;
+ static struct dsc$descriptor_s o;
+ static struct dsc$descriptor_s i;
+ static bool pass1 = TRUE;
+ long status;
+ short retval;
+
+ if (pass1)
+ {
+ pass1 = FALSE;
+ o.dsc$a_pointer = (char *) out;
+ o.dsc$w_length = (short)OUTSIZE;
+ i.dsc$a_pointer = in;
+ i.dsc$w_length = (short)strlen(in);
+ i.dsc$b_dtype = DSC$K_DTYPE_T;
+ i.dsc$b_class = DSC$K_CLASS_S;
+ o.dsc$b_dtype = DSC$K_DTYPE_VT;
+ o.dsc$b_class = DSC$K_CLASS_VS;
+ }
+ if ((status = lib$find_file(&i, &o, &context, 0, 0)) == RMS$_NORMAL)
+ {
+ out->body[out->curlen] = EOS;
+ return 1;
+ }
+ else if (status == RMS$_NMF)
+ retval = 0;
+ else
+ {
+ strcpy(out->body, in);
+ retval = -1;
+ }
+ lib$find_file_end(&context);
+ pass1 = TRUE;
+ return retval;
+}
+
+/*
+ v1.01 nmm 19-Aug-85 gfnames - return in successive calls the
+ name of each file specified by the provided arg expanding wildcards.
+*/
+char *
+gfnames (arg, p_error)
+ char *arg;
+ bool *p_error;
+{
+ static vspec filename = {MAX_FILE_SPEC_LEN, "\0"};
+
+ switch (fn_exp (&filename, arg))
+ {
+ case 1:
+ *p_error = FALSE;
+ return filename.body;
+ case 0:
+ *p_error = FALSE;
+ return NULL;
+ default:
+ *p_error = TRUE;
+ return filename.body;
+ }
+}
+
+#ifndef OLD /* Newer versions of VMS do provide `system'. */
+system (cmd)
+ char *cmd;
+{
+ error ("%s", "system() function not implemented under VMS");
+}
+#endif
+
+#define VERSION_DELIM ';'
+char *massage_name (s)
+ char *s;
+{
+ char *start = s;
+
+ for ( ; *s; s++)
+ if (*s == VERSION_DELIM)
+ {
+ *s = EOS;
+ break;
+ }
+ else
+ *s = lowcase (*s);
+ return start;
+}
+#endif /* VMS */
+
+\f
+int
+main (argc, argv)
+ int argc;
+ char *argv[];
+{
+ int i;
+ unsigned int nincluded_files;
+ char **included_files;
+ char *this_file;
+ argument *argbuffer;
+ int current_arg, file_count;
+ linebuffer filename_lb;
+#ifdef VMS
+ bool got_err;
+#endif
+
+#ifdef DOS_NT
+ _fmode = O_BINARY; /* all of files are treated as binary files */
+#endif /* DOS_NT */
+
+ progname = argv[0];
+ nincluded_files = 0;
+ included_files = xnew (argc, char *);
+ current_arg = 0;
+ file_count = 0;
+
+ /* Allocate enough no matter what happens. Overkill, but each one
+ is small. */
+ argbuffer = xnew (argc, argument);
+
+#ifdef ETAGS_REGEXPS
+ /* Set syntax for regular expression routines. */
+ re_set_syntax (RE_SYNTAX_EMACS | RE_INTERVALS);
+#endif /* ETAGS_REGEXPS */
+
+ /*
+ * If etags, always find typedefs and structure tags. Why not?
+ * Also default is to find macro constants, enum constants and
+ * global variables.
+ */
+ if (!CTAGS)
+ {
+ typedefs = typedefs_and_cplusplus = constantypedefs = TRUE;
+ globals = TRUE;
+ members = FALSE;
+ }
+
+ while (1)
+ {
+ int opt;
+ char *optstring;
+
+#ifdef ETAGS_REGEXPS
+#ifndef OO_BROWSER
+ optstring = "-aCdDf:Il:o:r:RStTi:BuvxwVhH";
+#else
+ optstring = "-aCdDf:Il:o:r:RStTi:BOuvxwVhH";
+#endif
+#else
+#ifndef OO_BROWSER
+ optstring = "-aCdDf:Il:o:StTi:BuvxwVhH";
+#else
+ optstring = "-aCdDf:Il:o:StTi:BOuvxwVhH";
+#endif
+#endif /* ETAGS_REGEXPS */
+
+#ifndef LONG_OPTIONS
+ optstring = optstring + 1;
+#endif /* LONG_OPTIONS */
+
+ opt = getopt_long (argc, argv, optstring, longopts, 0);
+ if (opt == EOF)
+ break;
+
+ switch (opt)
+ {
+ case 0:
+ /* If getopt returns 0, then it has already processed a
+ long-named option. We should do nothing. */
+ break;
+
+ case 1:
+ /* This means that a file name has been seen. Record it. */
+ argbuffer[current_arg].arg_type = at_filename;
+ argbuffer[current_arg].what = optarg;
+ ++current_arg;
+ ++file_count;
+ break;
+
+ /* Common options. */
+ case 'a': append_to_tagfile = TRUE; break;
+ case 'C': cplusplus = TRUE; break;
+ case 'd': constantypedefs = TRUE; break;
+ case 'D': constantypedefs = FALSE; break;
+ case 'f': /* for compatibility with old makefiles */
+ case 'o':
+ if (tagfile)
+ {
+ /* convert char to string, to call error with */
+ char buf[2];
+ sprintf (buf, "%c", opt);
+ error ("-%s option may only be given once.", buf);
+ suggest_asking_for_help ();
+ }
+ tagfile = optarg;
+ break;
+#ifdef OO_BROWSER
+ case 'O':
+ oo_browser_format = TRUE;
+ break;
+#endif
+ case 'I':
+ case 'S': /* for backward compatibility */
+ noindentypedefs = TRUE;
+ break;
+ case 'l':
+ {
+ language *lang = get_language_from_name (optarg);
+ if (lang != NULL)
+ {
+ argbuffer[current_arg].lang = lang;
+ argbuffer[current_arg].arg_type = at_language;
+ ++current_arg;
+ }
+ }
+ break;
+#ifdef ETAGS_REGEXPS
+ case 'r':
+ argbuffer[current_arg].arg_type = at_regexp;
+ argbuffer[current_arg].what = optarg;
+ ++current_arg;
+ break;
+ case 'R':
+ argbuffer[current_arg].arg_type = at_regexp;
+ argbuffer[current_arg].what = NULL;
+ ++current_arg;
+ break;
+#endif /* ETAGS_REGEXPS */
+ case 'V':
+ print_version ();
+ break;
+ case 'h':
+ case 'H':
+ print_help ();
+ break;
+ case 't':
+ typedefs = TRUE;
+ break;
+ case 'T':
+ typedefs = typedefs_and_cplusplus = TRUE;
+ break;
+#if (!CTAGS)
+ /* Etags options */
+ case 'i':
+ included_files[nincluded_files++] = optarg;
+ break;
+#else /* CTAGS */
+ /* Ctags options. */
+ case 'B': searchar = '?'; break;
+ case 'u': update = TRUE; break;
+ case 'v': vgrind_style = TRUE; /*FALLTHRU*/
+ case 'x': cxref_style = TRUE; break;
+ case 'w': no_warnings = TRUE; break;
+#endif /* CTAGS */
+ default:
+ suggest_asking_for_help ();
+ }
+ }
+
+ for (; optind < argc; ++optind)
+ {
+ argbuffer[current_arg].arg_type = at_filename;
+ argbuffer[current_arg].what = argv[optind];
+ ++current_arg;
+ ++file_count;
+ }
+
+ if (nincluded_files == 0 && file_count == 0)
+ {
+ error ("no input files specified.", 0);
+ suggest_asking_for_help ();
+ }
+
+ if (tagfile == NULL)
+ tagfile = CTAGS ? "tags" : "TAGS";
+ cwd = etags_getcwd (); /* the current working directory */
+ if (cwd[strlen (cwd) - 1] != '/')
+ {
+ char *oldcwd = cwd;
+ cwd = concat (oldcwd, "/", "");
+ free (oldcwd);
+ }
+ if (streq (tagfile, "-"))
+ tagfiledir = cwd;
+ else
+ tagfiledir = absolute_dirname (tagfile, cwd);
+
+ init (); /* set up boolean "functions" */
+
+ initbuffer (&lb);
+ initbuffer (&token_name);
+ initbuffer (&lbs[0].lb);
+ initbuffer (&lbs[1].lb);
+ initbuffer (&filename_lb);
+
+ if (!CTAGS)
+ {
+ if (streq (tagfile, "-"))
+ {
+ tagf = stdout;
+#ifdef DOS_NT
+ /* Switch redirected `stdout' to binary mode (setting `_fmode'
+ doesn't take effect until after `stdout' is already open). */
+ if (!isatty (fileno (stdout)))
+ setmode (fileno (stdout), O_BINARY);
+#endif /* DOS_NT */
+ }
+ else
+ tagf = fopen (tagfile, append_to_tagfile ? "a" : "w");
+ if (tagf == NULL)
+ pfatal (tagfile);
+ }
+
+ /*
+ * Loop through files finding functions.
+ */
+ for (i = 0; i < current_arg; ++i)
+ {
+ switch (argbuffer[i].arg_type)
+ {
+ case at_language:
+ forced_lang = argbuffer[i].lang;
+ break;
+#ifdef ETAGS_REGEXPS
+ case at_regexp:
+ analyse_regex (argbuffer[i].what);
+ break;
+#endif
+ case at_filename:
+#ifdef VMS
+ while ((this_file = gfnames (argbuffer[i].what, &got_err)) != NULL)
+ {
+ if (got_err)
+ {
+ error ("can't find file %s\n", this_file);
+ argc--, argv++;
+ }
+ else
+ {
+ this_file = massage_name (this_file);
+ }
+#else
+ this_file = argbuffer[i].what;
+#endif
+#ifdef OO_BROWSER
+ oo_browser_clear_all_globals();
+#endif
+ /* Input file named "-" means read file names from stdin
+ (one per line) and use them. */
+ if (streq (this_file, "-"))
+ while (readline_internal (&filename_lb, stdin) > 0)
+#ifdef OO_BROWSER
+ {
+ oo_browser_clear_some_globals();
+#endif
+ process_file (filename_lb.buffer);
+#ifdef OO_BROWSER
+ }
+#endif
+ else
+ process_file (this_file);
+#ifdef VMS
+ }
+#endif
+ break;
+ }
+ }
+
+#ifdef ETAGS_REGEXPS
+ free_patterns ();
+#endif /* ETAGS_REGEXPS */
+
+ if (!CTAGS)
+ {
+ while (nincluded_files-- > 0)
+ fprintf (tagf, "\f\n%s,include\n", *included_files++);
+
+ fclose (tagf);
+ exit (GOOD);
+ }
+
+ /* If CTAGS, we are here. process_file did not write the tags yet,
+ because we want them ordered. Let's do it now. */
+ if (cxref_style)
+ {
+ put_entries (head);
+ exit (GOOD);
+ }
+
+ if (update)
+ {
+ char cmd[BUFSIZ];
+ for (i = 0; i < current_arg; ++i)
+ {
+ if (argbuffer[i].arg_type != at_filename)
+ continue;
+ sprintf (cmd,
+ "mv %s OTAGS;fgrep -v '\t%s\t' OTAGS >%s;rm OTAGS",
+ tagfile, argbuffer[i].what, tagfile);
+ if (system (cmd) != GOOD)
+ fatal ("failed to execute shell command", (char *)NULL);
+ }
+ append_to_tagfile = TRUE;
+ }
+
+ tagf = fopen (tagfile, append_to_tagfile ? "a" : "w");
+ if (tagf == NULL)
+ pfatal (tagfile);
+ put_entries (head);
+ fclose (tagf);
+
+ if (update)
+ {
+ char cmd[BUFSIZ];
+ sprintf (cmd, "sort %s -o %s", tagfile, tagfile);
+ exit (system (cmd));
+ }
+ return GOOD;
+}
+
+
+/*
+ * Return a language given the name.
+ */
+language *
+get_language_from_name (name)
+ char *name;
+{
+ language *lang;
+
+ if (name == NULL)
+ error ("empty language name", (char *)NULL);
+ else
+ {
+ for (lang = lang_names; lang->name != NULL; lang++)
+ if (streq (name, lang->name))
+ return lang;
+ error ("unknown language \"%s\"", name);
+ }
+
+ return NULL;
+}
+
+
+/*
+ * Return a language given the interpreter name.
+ */
+language *
+get_language_from_interpreter (interpreter)
+ char *interpreter;
+{
+ language *lang;
+ char **iname;
+
+ if (interpreter == NULL)
+ return NULL;
+ for (lang = lang_names; lang->name != NULL; lang++)
+ if (lang->interpreters != NULL)
+ for (iname = lang->interpreters; *iname != NULL; iname++)
+ if (streq (*iname, interpreter))
+ return lang;
+
+ return NULL;
+}
+
+
+
+/*
+ * Return a language given the file suffix.
+ */
+language *
+get_language_from_suffix (suffix)
+ char *suffix;
+{
+ language *lang;
+ char **ext;
+
+ if (suffix == NULL)
+ return NULL;
+ for (lang = lang_names; lang->name != NULL; lang++)
+ if (lang->suffixes != NULL)
+ for (ext = lang->suffixes; *ext != NULL; ext++)
+ if (streq (*ext, suffix))
+ return lang;
+
+ return NULL;
+}
+
+
+/*
+ * This routine is called on each file argument.
+ */
+void
+process_file (file)
+ char *file;
+{
+ struct stat stat_buf;
+ FILE *inf;
+
+ canonicalize_filename (file);
+ if (stat (file, &stat_buf) == 0 && !S_ISREG (stat_buf.st_mode))
+ {
+ error ("skipping %s: it is not a regular file.", file);
+ return;
+ }
+ if (streq (file, tagfile) && !streq (tagfile, "-"))
+ {
+ error ("skipping inclusion of %s in self.", file);
+ return;
+ }
+ inf = fopen (file, "r");
+ if (inf == NULL)
+ {
+ perror (file);
+ return;
+ }
+
+ find_entries (file, inf);
+
+ if (!CTAGS)
+ {
+ char *filename;
+
+ if (filename_is_absolute (file))
+ {
+ /* file is an absolute file name. Canonicalise it. */
+ filename = absolute_filename (file, cwd);
+ }
+ else
+ {
+ /* file is a file name relative to cwd. Make it relative
+ to the directory of the tags file. */
+ filename = relative_filename (file, tagfiledir);
+ }
+#ifdef OO_BROWSER
+ if (oo_browser_format)
+ fprintf (tagf, "\f\n%s\n", filename);
+ else
+#endif
+ fprintf (tagf, "\f\n%s,%d\n", filename, total_size_of_entries (head));
+ free (filename);
+ put_entries (head);
+ free_tree (head);
+ head = NULL;
+ }
+}
+
+/*
+ * This routine sets up the boolean pseudo-functions which work
+ * by setting boolean flags dependent upon the corresponding character.
+ * Every char which is NOT in that string is not a white char. Therefore,
+ * all of the array "_wht" is set to FALSE, and then the elements
+ * subscripted by the chars in "white" are set to TRUE. Thus "_wht"
+ * of a char is TRUE if it is the string "white", else FALSE.
+ */
+void
+init ()
+{
+ register char *sp;
+ register int i;
+
+ for (i = 0; i < CHARS; i++)
+ iswhite(i) = notinname(i) = begtoken(i) = intoken(i) = endtoken(i) = FALSE;
+ for (sp = white; *sp != '\0'; sp++) iswhite (*sp) = TRUE;
+ for (sp = nonam; *sp != '\0'; sp++) notinname (*sp) = TRUE;
+ for (sp = begtk; *sp != '\0'; sp++) begtoken (*sp) = TRUE;
+ for (sp = midtk; *sp != '\0'; sp++) intoken (*sp) = TRUE;
+ for (sp = endtk; *sp != '\0'; sp++) endtoken (*sp) = TRUE;
+ iswhite('\0') = iswhite('\n');
+ notinname('\0') = notinname('\n');
+ begtoken('\0') = begtoken('\n');
+ intoken('\0') = intoken('\n');
+ endtoken('\0') = endtoken('\n');
+}
+
+/*
+ * This routine opens the specified file and calls the function
+ * which finds the function and type definitions.
+ */
+node *last_node = NULL;
+
+void
+find_entries (file, inf)
+ char *file;
+ FILE *inf;
+{
+ char *cp;
+ language *lang;
+ node *old_last_node;
+
+ curfile = savestr (file);
+
+ /* If user specified a language, use it. */
+ lang = forced_lang;
+ if (lang != NULL && lang->function != NULL)
+ {
+ curlang = lang;
+ lang->function (inf);
+ free (curfile);
+ fclose (inf);
+ return;
+ }
+
+ cp = etags_strrchr (file, '.');
+ if (cp != NULL)
+ {
+ cp += 1;
+ lang = get_language_from_suffix (cp);
+ if (lang != NULL && lang->function != NULL)
+ {
+ curlang = lang;
+ lang->function (inf);
+ free (curfile);
+ fclose (inf);
+ return;
+ }
+ }
+
+ /* Look for sharp-bang as the first two characters. */
+ if (readline_internal (&lb, inf) > 0
+ && lb.len >= 2
+ && lb.buffer[0] == '#'
+ && lb.buffer[1] == '!')
+ {
+ char *lp;
+
+ /* Set lp to point at the first char after the last slash in the
+ line or, if no slashes, at the first nonblank. Then set cp to
+ the first successive blank and terminate the string. */
+ lp = etags_strrchr (lb.buffer+2, '/');
+ if (lp != NULL)
+ lp += 1;
+ else
+ lp = skip_spaces (lb.buffer + 2);
+ cp = skip_non_spaces (lp);
+ *cp = '\0';
+
+ if (strlen (lp) > 0)
+ {
+ lang = get_language_from_interpreter (lp);
+ if (lang != NULL && lang->function != NULL)
+ {
+ curlang = lang;
+ lang->function (inf);
+ fclose (inf);
+ free (curfile);
+ return;
+ }
+ }
+ }
+ rewind (inf);
+
+ /* Try Fortran. */
+ old_last_node = last_node;
+ curlang = get_language_from_name ("fortran");
+ Fortran_functions (inf);
+
+ /* No Fortran entries found. Try C. */
+ if (old_last_node == last_node)
+ {
+ rewind (inf);
+ curlang = get_language_from_name (cplusplus ? "c++" : "c");
+ default_C_entries (inf);
+ }
+ free (curfile);
+ fclose (inf);
+ return;
+}
+\f
+/* Record a tag. */
+void
+pfnote (name, is_func, linestart, linelen, lno, cno)
+ char *name; /* tag name, or NULL if unnamed */
+ bool is_func; /* tag is a function */
+ char *linestart; /* start of the line where tag is */
+ int linelen; /* length of the line where tag is */
+ int lno; /* line number */
+ long cno; /* character number */
+{
+ register node *np;
+
+ if (CTAGS && name == NULL)
+ return;
+
+ np = xnew (1, node);
+
+ /* If ctags mode, change name "main" to M<thisfilename>. */
+ if (CTAGS && !cxref_style && streq (name, "main"))
+ {
+ register char *fp = etags_strrchr (curfile, '/');
+ np->name = concat ("M", fp == 0 ? curfile : fp + 1, "");
+ fp = etags_strrchr (np->name, '.');
+ if (fp && fp[1] != '\0' && fp[2] == '\0')
+ fp[0] = 0;
+ }
+ else
+ np->name = name;
+ np->been_warned = FALSE;
+ np->file = curfile;
+ np->is_func = is_func;
+ np->lno = lno;
+ /* Our char numbers are 0-base, because of C language tradition?
+ ctags compatibility? old versions compatibility? I don't know.
+ Anyway, since emacs's are 1-base we expect etags.el to take care
+ of the difference. If we wanted to have 1-based numbers, we would
+ uncomment the +1 below. */
+ np->cno = cno /* + 1 */ ;
+ np->left = np->right = NULL;
+ if (CTAGS && !cxref_style)
+ {
+ if (strlen (linestart) < 50)
+ np->pat = concat (linestart, "$", "");
+ else
+ np->pat = savenstr (linestart, 50);
+ }
+ else
+ np->pat = savenstr (linestart, linelen);
+
+#ifdef OO_BROWSER
+ if (oo_browser_format)
+ np->construct = oo_browser_construct;
+ oo_browser_construct = C_NULL;
+ oo_browser_check_and_clear_structtype();
+#endif
+
+ add_node (np, &head);
+}
+
+/* Date: Wed, 22 Jan 1997 02:56:31 -0500 [last amended 18 Sep 1997]
+ * From: Sam Kendall <kendall@mv.mv.com>
+ * Subject: Proposal for firming up the TAGS format specification
+ * To: F.Potorti@cnuce.cnr.it
+ *
+ * pfnote should emit the optimized form [unnamed tag] only if:
+ * 1. name does not contain any of the characters " \t\r\n(),;";
+ * 2. linestart contains name as either a rightmost, or rightmost but
+ * one character, substring;
+ * 3. the character, if any, immediately before name in linestart must
+ * be one of the characters " \t(),;";
+ * 4. the character, if any, immediately after name in linestart must
+ * also be one of the characters " \t(),;".
+ *
+ * The real implementation uses the notinname() macro, which recognises
+ * characters slightly different form " \t\r\n(),;". See the variable
+ * `nonam'.
+ */
+#define traditional_tag_style TRUE
+void
+new_pfnote (name, namelen, is_func, linestart, linelen, lno, cno)
+ char *name; /* tag name, or NULL if unnamed */
+ int namelen; /* tag length */
+ bool is_func; /* tag is a function */
+ char *linestart; /* start of the line where tag is */
+ int linelen; /* length of the line where tag is */
+ int lno; /* line number */
+ long cno; /* character number */
+{
+ register char *cp;
+ bool named;
+
+ named = TRUE;
+ if (!CTAGS)
+ {
+ for (cp = name; !notinname (*cp); cp++)
+ continue;
+ if (*cp == '\0') /* rule #1 */
+ {
+ cp = linestart + linelen - namelen;
+ if (notinname (linestart[linelen-1]))
+ cp -= 1; /* rule #4 */
+#ifdef OO_BROWSER
+ if (!oo_browser_format
+ && cp >= linestart /* rule #2 */
+#else
+ if (cp >= linestart /* rule #2 */
+#endif
+ && (cp == linestart
+ || notinname (cp[-1])) /* rule #3 */
+ && strneq (name, cp, namelen)) /* rule #2 */
+ named = FALSE; /* use unnamed tag */
+ }
+ }
+
+ if (named)
+ name = savenstr (name, namelen);
+ else
+ name = NULL;
+ pfnote (name, is_func, linestart, linelen, lno, cno);
+}
+
+/*
+ * free_tree ()
+ * recurse on left children, iterate on right children.
+ */
+void
+free_tree (np)
+ register node *np;
+{
+ while (np)
+ {
+ register node *node_right = np->right;
+ free_tree (np->left);
+ if (np->name != NULL)
+ free (np->name);
+ free (np->pat);
+ free (np);
+ np = node_right;
+ }
+}
+
+/*
+ * add_node ()
+ * Adds a node to the tree of nodes. In etags mode, we don't keep
+ * it sorted; we just keep a linear list. In ctags mode, maintain
+ * an ordered tree, with no attempt at balancing.
+ *
+ * add_node is the only function allowed to add nodes, so it can
+ * maintain state.
+ */
+void
+add_node (np, cur_node_p)
+ node *np, **cur_node_p;
+{
+ register int dif;
+ register node *cur_node = *cur_node_p;
+
+ if (cur_node == NULL)
+ {
+ *cur_node_p = np;
+ last_node = np;
+ return;
+ }
+
+ if (!CTAGS)
+ {
+ /* Etags Mode */
+ if (last_node == NULL)
+ fatal ("internal error in add_node", (char *)NULL);
+ last_node->right = np;
+ last_node = np;
+ }
+ else
+ {
+ /* Ctags Mode */
+ dif = strcmp (np->name, cur_node->name);
+
+ /*
+ * If this tag name matches an existing one, then
+ * do not add the node, but maybe print a warning.
+ */
+ if (!dif)
+ {
+ if (streq (np->file, cur_node->file))
+ {
+ if (!no_warnings)
+ {
+ fprintf (stderr, "Duplicate entry in file %s, line %d: %s\n",
+ np->file, lineno, np->name);
+ fprintf (stderr, "Second entry ignored\n");
+ }
+ }
+ else if (!cur_node->been_warned && !no_warnings)
+ {
+ fprintf
+ (stderr,
+ "Duplicate entry in files %s and %s: %s (Warning only)\n",
+ np->file, cur_node->file, np->name);
+ cur_node->been_warned = TRUE;
+ }
+ return;
+ }
+
+ /* Actually add the node */
+ add_node (np, dif < 0 ? &cur_node->left : &cur_node->right);
+ }
+}
+\f
+#ifdef OO_BROWSER
+/* Default class name for the current OO-Browser tag. */
+static char *oo_browser_class;
+/* Prefix character to use in OO-Browser listings for the current tag. */
+static char oo_browser_prefix;
+#endif
+
+void
+put_entries (np)
+ register node *np;
+{
+ register char *sp;
+
+ if (np == NULL)
+ return;
+
+ /* Output subentries that precede this one */
+ put_entries (np->left);
+
+ /* Output this entry */
+
+ if (!CTAGS)
+ {
+#ifdef OO_BROWSER
+ if (oo_browser_format)
+ {
+ /* Omit C++ `class' and `method' entries as well as Objective-C
+ entries from this OO-Browser tags file since the browser handles
+ them independently of this file. Omit `extern' variable declarations
+ as they are unused by the OO-Browser. */
+ if (np->construct != C_CLASS
+ && np->construct != C_METHOD
+ && np->construct != C_EXTERN
+ && np->construct != C_OBJC)
+ {
+ oo_browser_class = oo_browser_default_classes[np->construct];
+ switch (np->construct)
+ {
+ case C_CONSTANT:
+ case C_ENUMERATION:
+ case C_ENUM_LABEL:
+ case C_STRUCTURE:
+ case C_TYPE:
+ case C_UNION:
+ case C_VARIABLE:
+ oo_browser_prefix = '=';
+ break;
+ case C_FUNCTION:
+ case C_MACRO:
+ oo_browser_prefix = '-';
+ break;
+ }
+ if (np->name != NULL)
+ fprintf (tagf, "%s@%c %s@%s\n",
+ oo_browser_class, oo_browser_prefix,
+ np->name, np->pat);
+ else
+ fprintf (tagf, "%s@%c ???@%s\n",
+ oo_browser_class, oo_browser_prefix, np->pat);
+ }
+ }
+ else
+ {
+#endif
+ if (np->name != NULL)
+ fprintf (tagf, "%s\177%s\001%d,%ld\n",
+ np->pat, np->name, np->lno, np->cno);
+ else
+ fprintf (tagf, "%s\177%d,%ld\n",
+ np->pat, np->lno, np->cno);
+#ifdef OO_BROWSER
+ }
+#endif
+ }
+ else
+ {
+ if (np->name == NULL)
+ error ("internal error: NULL name in ctags mode.", (char *)NULL);
+
+ if (cxref_style)
+ {
+ if (vgrind_style)
+ fprintf (stdout, "%s %s %d\n",
+ np->name, np->file, (np->lno + 63) / 64);
+ else
+ fprintf (stdout, "%-16s %3d %-16s %s\n",
+ np->name, np->lno, np->file, np->pat);
+ }
+ else
+ {
+ fprintf (tagf, "%s\t%s\t", np->name, np->file);
+
+ if (np->is_func)
+ { /* a function */
+ putc (searchar, tagf);
+ putc ('^', tagf);
+
+ for (sp = np->pat; *sp; sp++)
+ {
+ if (*sp == '\\' || *sp == searchar)
+ putc ('\\', tagf);
+ putc (*sp, tagf);
+ }
+ putc (searchar, tagf);
+ }
+ else
+ { /* a typedef; text pattern inadequate */
+ fprintf (tagf, "%d", np->lno);
+ }
+ putc ('\n', tagf);
+ }
+ }
+
+ /* Output subentries that follow this one */
+ put_entries (np->right);
+}
+
+/* Length of a number's decimal representation. */
+int number_len PP ((long num));
+int
+number_len (num)
+ long num;
+{
+ int len = 1;
+ while ((num /= 10) > 0)
+ len += 1;
+ return len;
+}
+
+/*
+ * Return total number of characters that put_entries will output for
+ * the nodes in the subtree of the specified node. Works only if
+ * we are not ctags, but called only in that case. This count
+ * is irrelevant with the new tags.el, but is still supplied for
+ * backward compatibility.
+ */
+int
+total_size_of_entries (np)
+ register node *np;
+{
+ register int total;
+
+ if (np == NULL)
+ return 0;
+
+ for (total = 0; np != NULL; np = np->right)
+ {
+ /* Count left subentries. */
+ total += total_size_of_entries (np->left);
+
+ /* Count this entry */
+ total += strlen (np->pat) + 1;
+ total += number_len ((long) np->lno) + 1 + number_len (np->cno) + 1;
+ if (np->name != NULL)
+ total += 1 + strlen (np->name); /* \001name */
+ }
+
+ return total;
+}
+\f
+/*
+ * The C symbol tables.
+ */
+enum sym_type
+{
+ st_none,
+ st_C_objprot, st_C_objimpl, st_C_objend,
+ st_C_gnumacro,
+ st_C_ignore,
+ st_C_javastruct,
+ st_C_struct, st_C_enum, st_C_define, st_C_typedef, st_C_typespec,
+ st_C_const
+#ifdef OO_BROWSER
+ , st_C_union, st_C_class, st_C_extern, st_C_inline
+#endif
+};
+
+/* Feed stuff between (but not including) %[ and %] lines to:
+ gperf -c -k 1,3 -o -p -r -t
+%[
+struct C_stab_entry { char *name; int c_ext; enum sym_type type; }
+%%
+@interface, 0, st_C_objprot
+@protocol, 0, st_C_objprot
+@implementation,0, st_C_objimpl
+@end, 0, st_C_objend
+import, C_JAVA, st_C_ignore
+package, C_JAVA, st_C_ignore
+friend, C_PLPL, st_C_ignore
+extends, C_JAVA, st_C_javastruct
+implements, C_JAVA, st_C_javastruct
+interface, C_JAVA, st_C_struct
+class, C_PLPL, st_C_class
+namespace, C_PLPL, st_C_struct
+domain, C_STAR, st_C_struct
+union, 0, st_C_union
+struct, 0, st_C_struct
+enum, 0, st_C_enum
+typedef, 0, st_C_typedef
+define, 0, st_C_define
+inline, 0, st_C_inline
+bool, C_PLPL, st_C_typespec
+long, 0, st_C_typespec
+short, 0, st_C_typespec
+int, 0, st_C_typespec
+char, 0, st_C_typespec
+float, 0, st_C_typespec
+double, 0, st_C_typespec
+signed, 0, st_C_typespec
+unsigned, 0, st_C_typespec
+auto, 0, st_C_typespec
+void, 0, st_C_typespec
+extern, 0, st_C_extern
+static, 0, st_C_typespec
+const, 0, st_C_const
+volatile, 0, st_C_typespec
+explicit, C_PLPL, st_C_typespec
+mutable, C_PLPL, st_C_typespec
+typename, C_PLPL, st_C_typespec
+# DEFUN used in emacs, the next three used in glibc (SYSCALL only for mach).
+DEFUN, 0, st_C_gnumacro
+SYSCALL, 0, st_C_gnumacro
+ENTRY, 0, st_C_gnumacro
+PSEUDO, 0, st_C_gnumacro
+# These are defined inside C functions, so currently they are not met.
+# EXFUN used in glibc, DEFVAR_* in emacs.
+#EXFUN, 0, st_C_gnumacro
+#DEFVAR_, 0, st_C_gnumacro
+%]
+and replace lines between %< and %> with its output. */
+/*%<*/
+/* C code produced by gperf version 2.5 (GNU C++ version) */
+/* Command-line: gperf -c -k 1,3 -o -p -r -t */
+struct C_stab_entry { char *name; int c_ext; enum sym_type type; };
+
+#define TOTAL_KEYWORDS 41
+#define MIN_WORD_LENGTH 3
+#define MAX_WORD_LENGTH 15
+#define MIN_HASH_VALUE 13
+#define MAX_HASH_VALUE 129
+/* maximum key range = 117, duplicates = 0 */
+
+static unsigned int
+hash (str, len)
+ register char *str;
+ register int unsigned len;
+{
+ static unsigned char asso_values[] =
+ {
+ 130, 130, 130, 130, 130, 130, 130, 130, 130, 130,
+ 130, 130, 130, 130, 130, 130, 130, 130, 130, 130,
+ 130, 130, 130, 130, 130, 130, 130, 130, 130, 130,
+ 130, 130, 130, 130, 130, 130, 130, 130, 130, 130,
+ 130, 130, 130, 130, 130, 130, 130, 130, 130, 130,
+ 130, 130, 130, 130, 130, 130, 130, 130, 130, 130,
+ 130, 130, 130, 130, 13, 130, 130, 130, 33, 32,
+ 47, 130, 130, 130, 130, 130, 130, 130, 130, 130,
+ 5, 130, 130, 20, 32, 130, 130, 130, 130, 130,
+ 130, 130, 130, 130, 130, 130, 130, 47, 55, 8,
+ 15, 33, 61, 38, 130, 60, 130, 130, 2, 9,
+ 10, 62, 59, 130, 28, 27, 50, 19, 3, 130,
+ 130, 130, 130, 130, 130, 130, 130, 130,
+ };
+ return len + asso_values[str[2]] + asso_values[str[0]];
+}
+
+struct C_stab_entry *
+in_word_set (str, len)
+ register char *str;
+ register unsigned int len;
+{
+ static struct C_stab_entry wordlist[] =
+ {
+ {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",},
+ {"",}, {"",}, {"",}, {"",},
+ {"volatile", 0, st_C_typespec},
+ {"",}, {"",},
+ {"long", 0, st_C_typespec},
+ {"",}, {"",}, {"",}, {"",}, {"",}, {"",},
+ {"const", 0, st_C_const},
+ {"",}, {"",}, {"",},
+ {"@end", 0, st_C_objend},
+ {"namespace", C_PLPL, st_C_struct},
+ {"",},
+ {"domain", C_STAR, st_C_struct},
+ {"",}, {"",},
+ {"@interface", 0, st_C_objprot},
+ {"",}, {"",}, {"",},
+ {"@implementation", 0, st_C_objimpl},
+ {"",}, {"",},
+ {"double", 0, st_C_typespec},
+ {"",}, {"",},
+ {"PSEUDO", 0, st_C_gnumacro},
+ {"",}, {"",}, {"",},
+ {"SYSCALL", 0, st_C_gnumacro},
+ {"",}, {"",},
+ {"@protocol", 0, st_C_objprot},
+ {"",}, {"",}, {"",},
+ {"unsigned", 0, st_C_typespec},
+ {"",},
+ {"enum", 0, st_C_enum},
+ {"",}, {"",},
+ {"char", 0, st_C_typespec},
+ {"class", C_PLPL, st_C_class},
+ {"struct", 0, st_C_struct},
+ {"",}, {"",}, {"",}, {"",},
+ {"mutable", C_PLPL, st_C_typespec},
+ {"void", 0, st_C_typespec},
+ {"inline", 0, st_C_inline},
+ {"ENTRY", 0, st_C_gnumacro},
+ {"",},
+ {"signed", 0, st_C_typespec},
+ {"",}, {"",},
+ {"package", C_JAVA, st_C_ignore},
+ {"",}, {"",}, {"",}, {"",}, {"",},
+ {"static", 0, st_C_typespec},
+ {"",},
+ {"define", 0, st_C_define},
+ {"",},
+ {"union", 0, st_C_union},
+ {"DEFUN", 0, st_C_gnumacro},
+ {"",}, {"",}, {"",},
+ {"extern", 0, st_C_extern},
+ {"extends", C_JAVA, st_C_javastruct},
+ {"",}, {"",}, {"",},
+ {"short", 0, st_C_typespec},
+ {"",}, {"",}, {"",}, {"",}, {"",},
+ {"explicit", C_PLPL, st_C_typespec},
+ {"auto", 0, st_C_typespec},
+ {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",},
+ {"",}, {"",},
+ {"int", 0, st_C_typespec},
+ {"",}, {"",},
+ {"typedef", 0, st_C_typedef},
+ {"typename", C_PLPL, st_C_typespec},
+ {"",},
+ {"interface", C_JAVA, st_C_struct},
+ {"",},
+ {"bool", C_PLPL, st_C_typespec},
+ {"",}, {"",}, {"",},
+ {"import", C_JAVA, st_C_ignore},
+ {"",},
+ {"friend", C_PLPL, st_C_ignore},
+ {"float", 0, st_C_typespec},
+ {"implements", C_JAVA, st_C_javastruct},
+ };
+
+ if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)
+ {
+ register int key = hash (str, len);
+
+ if (key <= MAX_HASH_VALUE && key >= 0)
+ {
+ register char *s = wordlist[key].name;
+
+ if (*s == *str && !strncmp (str + 1, s + 1, len - 1))
+ return &wordlist[key];
+ }
+ }
+ return 0;
+}
+/*%>*/
+
+enum sym_type C_symtype PP ((char *str, int len, int c_ext));
+enum sym_type
+C_symtype (str, len, c_ext)
+ char *str;
+ int len;
+ int c_ext;
+{
+ register struct C_stab_entry *se = in_word_set (str, len);
+
+ if (se == NULL || (se->c_ext && !(c_ext & se->c_ext)))
+ return st_none;
+ return se->type;
+}
+\f
+ /*
+ * C functions and variables are recognized using a simple
+ * finite automaton. fvdef is its state variable.
+ */
+enum
+{
+ fvnone, /* nothing seen */
+ fvnameseen, /* function or variable name seen */
+ fstartlist, /* func: just after open parenthesis */
+ finlist, /* func: in parameter list */
+ flistseen, /* func: after parameter list */
+ fignore, /* func: before open brace */
+ vignore /* var-like: ignore until ';' */
+} fvdef;
+
+
+ /*
+ * typedefs are recognized using a simple finite automaton.
+ * typdef is its state variable.
+ */
+enum
+{
+ tnone, /* nothing seen */
+ ttypedseen, /* typedef keyword seen */
+ tinbody, /* inside typedef body */
+ tend, /* just before typedef tag */
+ tignore /* junk after typedef tag */
+} typdef;
+
+
+ /*
+ * struct-like structures (enum, struct and union) are recognized
+ * using another simple finite automaton. `structdef' is its state
+ * variable.
+ */
+enum
+{
+ snone, /* nothing seen yet */
+ skeyseen, /* struct-like keyword seen */
+ stagseen, /* struct-like tag seen */
+ scolonseen, /* colon seen after struct-like tag */
+ sinbody /* in struct body: recognize member func defs*/
+} structdef;
+
+/*
+ * When structdef is stagseen, scolonseen, or sinbody, structtag is the
+ * struct tag, and structtype is the type of the preceding struct-like
+ * keyword.
+ */
+char *structtag = "<uninited>";
+enum sym_type structtype;
+
+#ifdef OO_BROWSER
+void
+oo_browser_check_and_clear_structtype()
+{
+ /* Allow for multiple enum_label tags. */
+ if (structtype != st_C_enum)
+ structtype = st_none;
+}
+#endif
+
+/*
+ * When objdef is different from onone, objtag is the name of the class.
+ */
+char *objtag = "<uninited>";
+
+/*
+ * Yet another little state machine to deal with preprocessor lines.
+ */
+enum
+{
+ dnone, /* nothing seen */
+ dsharpseen, /* '#' seen as first char on line */
+ ddefineseen, /* '#' and 'define' seen */
+ dignorerest /* ignore rest of line */
+} definedef;
+
+/*
+ * State machine for Objective C protocols and implementations.
+ * Tom R.Hageman <tom@basil.icce.rug.nl>
+ */
+enum
+{
+ onone, /* nothing seen */
+ oprotocol, /* @interface or @protocol seen */
+ oimplementation, /* @implementations seen */
+ otagseen, /* class name seen */
+ oparenseen, /* parenthesis before category seen */
+ ocatseen, /* category name seen */
+ oinbody, /* in @implementation body */
+ omethodsign, /* in @implementation body, after +/- */
+ omethodtag, /* after method name */
+ omethodcolon, /* after method colon */
+ omethodparm, /* after method parameter */
+ oignore /* wait for @end */
+} objdef;
+
+/*
+ * Use this structure to keep info about the token read, and how it
+ * should be tagged. Used by the make_C_tag function to build a tag.
+ */
+typedef struct
+{
+ bool valid;
+ char *str;
+ bool named;
+ int linelen;
+ int lineno;
+ long linepos;
+ char *buffer;
+} token;
+
+token tok; /* latest token read */
+
+/*
+ * Set this to TRUE, and the next token considered is called a function.
+ * Used only for GNU emacs's function-defining macros.
+ */
+bool next_token_is_func;
+
+/*
+ * TRUE in the rules part of a yacc file, FALSE outside (parse as C).
+ */
+bool yacc_rules;
+
+/*
+ * methodlen is the length of the method name stored in token_name.
+ */
+int methodlen;
+
+#ifdef OO_BROWSER
+void
+oo_browser_clear_all_globals()
+{
+ /* Initialize globals so there is no carry over between files. */
+ oo_browser_construct = C_NULL;
+ fvdef = fvnone; typdef = tnone; structdef = snone;
+ definedef = dnone; objdef = onone;
+ structtype = st_none;
+ next_token_is_func = yacc_rules = FALSE;
+}
+
+void
+oo_browser_clear_some_globals()
+{
+ oo_browser_construct = C_NULL;
+ structtype = st_none;
+}
+#endif
+
+/*
+ * consider_token ()
+ * checks to see if the current token is at the start of a
+ * function or variable, or corresponds to a typedef, or
+ * is a struct/union/enum tag, or #define, or an enum constant.
+ *
+ * *IS_FUNC gets TRUE iff the token is a function or #define macro
+ * with args. C_EXT is which language we are looking at.
+ *
+ * In the future we will need some way to adjust where the end of
+ * the token is; for instance, implementing the C++ keyword
+ * `operator' properly will adjust the end of the token to be after
+ * whatever follows `operator'.
+ *
+ * Globals
+ * fvdef IN OUT
+ * structdef IN OUT
+ * definedef IN OUT
+ * typdef IN OUT
+ * objdef IN OUT
+ * next_token_is_func IN OUT
+ */
+bool consider_token PP ((char *str, int len, int c, int c_ext,
+ int cblev, int parlev, bool *is_func_or_var));
+bool
+consider_token (str, len, c, c_ext, cblev, parlev, is_func_or_var)
+ register char *str; /* IN: token pointer */
+ register int len; /* IN: token length */
+ register int c; /* IN: first char after the token */
+ int c_ext; /* IN: C extensions mask */
+ int cblev; /* IN: curly brace level */
+ int parlev; /* IN: parenthesis level */
+ bool *is_func_or_var; /* OUT: function or variable found */
+{
+ enum sym_type toktype = C_symtype (str, len, c_ext);
+
+#ifdef OO_BROWSER
+ switch (toktype)
+ {
+ case st_C_struct:
+ set_construct(C_STRUCTURE);
+ break;
+ case st_C_union:
+ set_construct(C_UNION);
+ break;
+ case st_C_class:
+ set_construct(C_CLASS);
+ break;
+ case st_C_enum:
+ set_construct(C_ENUMERATION);
+ break;
+ case st_C_typedef:
+ set_construct(C_TYPE);
+ break;
+ case st_C_extern:
+ set_construct(C_EXTERN);
+ break;
+ case st_C_inline:
+ set_construct(C_FUNCTION);
+ break;
+ }
+#endif
+
+ /*
+ * Advance the definedef state machine.
+ */
+ switch (definedef)
+ {
+ case dnone:
+ /* We're not on a preprocessor line. */
+ break;
+ case dsharpseen:
+ if (toktype == st_C_define)
+ {
+ definedef = ddefineseen;
+ }
+ else
+ {
+ definedef = dignorerest;
+ }
+ return FALSE;
+ case ddefineseen:
+ /*
+ * Make a tag for any macro, unless it is a constant
+ * and constantypedefs is FALSE.
+ */
+ definedef = dignorerest;
+#ifndef OO_BROWSER
+ *is_func_or_var = (c == '(');
+#else
+ {
+ char *p = str + len * sizeof(char);
+
+ if (*p == '(')
+ /* This must be a macro since there is no
+ whitespace between the opening parenthesis
+ and the definition name. */
+ *is_func_or_var = TRUE;
+ else
+ {
+ *is_func_or_var = FALSE;
+
+ /* Handle possible whitespace between macro tag and opening
+ parenthesis and ensure this is an actual macro.
+ -- Bob Weiner, Altrasoft, 11/19/1997 */
+ while (*p && isspace(*p)) p++;
+ if (*p) c = *p;
+
+ /* Skip over nested parentheses. */
+ if (c == '(')
+ {
+ short depth = 1;
+
+ while (*++p && depth > 0 && *p != '\n')
+ {
+ switch (*p)
+ {
+ case '(':
+ depth++; break;
+ case ')':
+ depth--; break;
+ }
+ }
+
+ /* If this is a macro, we have just passed
+ the arguments and there will be more on
+ the line before the NULL character that marks
+ the end of the line token. */
+ while (*p == ' ' || *p == '\t') p++;
+ if (*p) *is_func_or_var = TRUE;
+ }
+ }
+ }
+
+ set_construct((*is_func_or_var) ? C_MACRO : C_CONSTANT);
+#endif
+ if (!*is_func_or_var && !constantypedefs)
+ return FALSE;
+ else
+ return TRUE;
+ case dignorerest:
+ return FALSE;
+ default:
+ error ("internal error: definedef value.", (char *)NULL);
+ }
+
+ /*
+ * Now typedefs
+ */
+ switch (typdef)
+ {
+ case tnone:
+ if (toktype == st_C_typedef)
+ {
+ if (typedefs)
+ typdef = ttypedseen;
+ fvdef = fvnone;
+ return FALSE;
+ }
+ break;
+ case ttypedseen:
+ switch (toktype)
+ {
+ case st_C_const:
+ set_construct(C_CONSTANT);
+ /* fall through */
+ case st_none:
+ case st_C_typespec:
+#ifdef OO_BROWSER
+ case st_C_extern:
+#endif
+ typdef = tend;
+ break;
+ case st_C_struct:
+ case st_C_enum:
+#ifdef OO_BROWSER
+ case st_C_union:
+ case st_C_class:
+#endif
+ break;
+ }
+ /* Do not return here, so the structdef stuff has a chance. */
+ break;
+ case tend:
+ switch (toktype)
+ {
+ case st_C_const:
+ set_construct(C_CONSTANT);
+ /* fall through */
+ case st_C_typespec:
+ case st_C_struct:
+ case st_C_enum:
+#ifdef OO_BROWSER
+ case st_C_extern:
+ case st_C_union:
+ case st_C_class:
+#endif
+ return FALSE;
+ }
+ return TRUE;
+ }
+
+ /*
+ * This structdef business is currently only invoked when cblev==0.
+ * It should be recursively invoked whatever the curly brace level,
+ * and a stack of states kept, to allow for definitions of structs
+ * within structs.
+ *
+ * This structdef business is NOT invoked when we are ctags and the
+ * file is plain C. This is because a struct tag may have the same
+ * name as another tag, and this loses with ctags.
+ */
+ switch (toktype)
+ {
+ case st_C_javastruct:
+ if (structdef == stagseen)
+ structdef = scolonseen;
+ return FALSE;
+ case st_C_struct:
+ case st_C_enum:
+#ifdef OO_BROWSER
+ case st_C_union:
+ case st_C_class:
+ case st_C_extern:
+#endif
+ if (typdef == ttypedseen
+ || (typedefs_and_cplusplus && cblev == 0 && structdef == snone))
+ {
+ structdef = skeyseen;
+ structtype = toktype;
+ }
+ return FALSE;
+ }
+
+ if (structdef == skeyseen)
+ {
+ /* Save the tag for struct/union/class, for functions and variables
+ that may be defined inside. */
+#ifndef OO_BROWSER
+ if (structtype == st_C_struct)
+#else
+ if (structtype == st_C_struct
+ || structtype == st_C_union
+ || structtype == st_C_class)
+#endif
+ structtag = savenstr (str, len);
+ else
+ structtag = "<enum>";
+ structdef = stagseen;
+ return TRUE;
+ }
+
+ /* Avoid entering fvdef stuff if typdef is going on. */
+ if (typdef != tnone)
+ {
+ definedef = dnone;
+ return FALSE;
+ }
+
+ /* Detect GNU macros.
+
+ DEFUN note for writers of emacs C code:
+ The DEFUN macro, used in emacs C source code, has a first arg
+ that is a string (the lisp function name), and a second arg that
+ is a C function name. Since etags skips strings, the second arg
+ is tagged. This is unfortunate, as it would be better to tag the
+ first arg. The simplest way to deal with this problem would be
+ to name the tag with a name built from the function name, by
+ removing the initial 'F' character and substituting '-' for '_'.
+ Anyway, this assumes that the conventions of naming lisp
+ functions will never change. Currently, this method is not
+ implemented, so writers of emacs code are recommended to put the
+ first two args of a DEFUN on the same line. */
+ if (definedef == dnone && toktype == st_C_gnumacro)
+ {
+ next_token_is_func = TRUE;
+ return FALSE;
+ }
+ if (next_token_is_func)
+ {
+ next_token_is_func = FALSE;
+ fvdef = fignore;
+ *is_func_or_var = TRUE;
+ return TRUE;
+ }
+
+ /* Detect Objective C constructs. */
+ switch (objdef)
+ {
+ case onone:
+ switch (toktype)
+ {
+ case st_C_objprot:
+#ifdef OO_BROWSER
+ set_construct(C_OBJC);
+#endif
+ objdef = oprotocol;
+ return FALSE;
+ case st_C_objimpl:
+#ifdef OO_BROWSER
+ set_construct(C_OBJC);
+#endif
+ objdef = oimplementation;
+ return FALSE;
+ }
+ break;
+ case oimplementation:
+ /* Save the class tag for functions or variables defined inside. */
+ objtag = savenstr (str, len);
+ objdef = oinbody;
+ return FALSE;
+ case oprotocol:
+ /* Save the class tag for categories. */
+ objtag = savenstr (str, len);
+ objdef = otagseen;
+ *is_func_or_var = TRUE;
+ return TRUE;
+ case oparenseen:
+ objdef = ocatseen;
+ *is_func_or_var = TRUE;
+ return TRUE;
+ case oinbody:
+ break;
+ case omethodsign:
+ if (parlev == 0)
+ {
+ objdef = omethodtag;
+ methodlen = len;
+ grow_linebuffer (&token_name, methodlen + 1);
+ strncpy (token_name.buffer, str, len);
+ token_name.buffer[methodlen] = '\0';
+ token_name.len = methodlen;
+ return TRUE;
+ }
+ return FALSE;
+ case omethodcolon:
+ if (parlev == 0)
+ objdef = omethodparm;
+ return FALSE;
+ case omethodparm:
+ if (parlev == 0)
+ {
+ objdef = omethodtag;
+ methodlen += len;
+ grow_linebuffer (&token_name, methodlen + 1);
+ strncat (token_name.buffer, str, len);
+ token_name.len = methodlen;
+ return TRUE;
+ }
+ return FALSE;
+ case oignore:
+ if (toktype == st_C_objend)
+ {
+ /* Memory leakage here: the string pointed by objtag is
+ never released, because many tests would be needed to
+ avoid breaking on incorrect input code. The amount of
+ memory leaked here is the sum of the lengths of the
+ class tags.
+ free (objtag); */
+ objdef = onone;
+ }
+ return FALSE;
+ }
+
+ /* A function, variable or enum constant? */
+ switch (toktype)
+ {
+ case st_C_const:
+ set_construct(C_CONSTANT);
+ /* fall through */
+ case st_C_typespec:
+#ifdef OO_BROWSER
+ case st_C_extern:
+#endif
+ if (fvdef != finlist && fvdef != fignore && fvdef != vignore)
+ fvdef = fvnone; /* should be useless */
+ return FALSE;
+ case st_C_ignore:
+ fvdef = vignore;
+ return FALSE;
+ case st_none:
+ if (constantypedefs && structdef == sinbody && structtype == st_C_enum)
+#ifdef OO_BROWSER
+ {
+ oo_browser_construct = C_ENUM_LABEL;
+#endif
+ return TRUE;
+#ifdef OO_BROWSER
+ }
+#endif
+ if (fvdef == fvnone)
+ {
+ fvdef = fvnameseen; /* function or variable */
+ *is_func_or_var = TRUE;
+ return TRUE;
+ }
+ }
+
+ return FALSE;
+}
+
+/*
+ * C_entries ()
+ * This routine finds functions, variables, typedefs,
+ * #define's, enum constants and struct/union/enum definitions in
+ * #C syntax and adds them to the list.
+ */
+#define current_lb_is_new (newndx == curndx)
+#define switch_line_buffers() (curndx = 1 - curndx)
+
+#define curlb (lbs[curndx].lb)
+#define othlb (lbs[1-curndx].lb)
+#define newlb (lbs[newndx].lb)
+#define curlinepos (lbs[curndx].linepos)
+#define othlinepos (lbs[1-curndx].linepos)
+#define newlinepos (lbs[newndx].linepos)
+
+#define CNL_SAVE_DEFINEDEF() \
+do { \
+ curlinepos = charno; \
+ lineno++; \
+ linecharno = charno; \
+ charno += readline (&curlb, inf); \
+ lp = curlb.buffer; \
+ quotednl = FALSE; \
+ newndx = curndx; \
+} while (0)
+
+#define CNL() \
+do { \
+ CNL_SAVE_DEFINEDEF(); \
+ if (savetok.valid) \
+ { \
+ tok = savetok; \
+ savetok.valid = FALSE; \
+ } \
+ definedef = dnone; \
+} while (0)
+
+
+void make_C_tag PP ((bool isfun));
+void
+make_C_tag (isfun)
+ bool isfun;
+{
+ /* This function should never be called when tok.valid is FALSE, but
+ we must protect against invalid input or internal errors. */
+ if (tok.valid)
+ {
+ if (traditional_tag_style)
+ {
+ /* This was the original code. Now we call new_pfnote instead,
+ which uses the new method for naming tags (see new_pfnote). */
+ char *name = NULL;
+
+ if (CTAGS || tok.named)
+ name = savestr (token_name.buffer);
+ pfnote (name, isfun,
+ tok.buffer, tok.linelen, tok.lineno, tok.linepos);
+ }
+ else
+ new_pfnote (token_name.buffer, token_name.len, isfun,
+ tok.buffer, tok.linelen, tok.lineno, tok.linepos);
+ tok.valid = FALSE;
+ }
+ else if (DEBUG)
+ abort ();
+}
+
+
+void
+C_entries (c_ext, inf)
+ int c_ext; /* extension of C */
+ FILE *inf; /* input file */
+{
+ register char c; /* latest char read; '\0' for end of line */
+ register char *lp; /* pointer one beyond the character `c' */
+ int curndx, newndx; /* indices for current and new lb */
+ register int tokoff; /* offset in line of start of current token */
+ register int toklen; /* length of current token */
+ char *qualifier; /* string used to qualify names */
+ int qlen; /* length of qualifier */
+ int cblev; /* current curly brace level */
+ int parlev; /* current parenthesis level */
+ bool incomm, inquote, inchar, quotednl, midtoken;
+ bool cplpl, cjava;
+ token savetok; /* token saved during preprocessor handling */
+
+
+ tokoff = toklen = 0; /* keep compiler quiet */
+ curndx = newndx = 0;
+ lineno = 0;
+ charno = 0;
+ lp = curlb.buffer;
+ *lp = 0;
+
+ fvdef = fvnone; typdef = tnone; structdef = snone;
+ definedef = dnone; objdef = onone;
+ next_token_is_func = yacc_rules = FALSE;
+ midtoken = inquote = inchar = incomm = quotednl = FALSE;
+ tok.valid = savetok.valid = FALSE;
+ cblev = 0;
+ parlev = 0;
+ cplpl = (c_ext & C_PLPL) == C_PLPL;
+ cjava = (c_ext & C_JAVA) == C_JAVA;
+ if (cjava)
+ { qualifier = "."; qlen = 1; }
+ else
+ { qualifier = "::"; qlen = 2; }
+
+ while (!feof (inf))
+ {
+ c = *lp++;
+ if (c == '\\')
+ {
+ /* If we're at the end of the line, the next character is a
+ '\0'; don't skip it, because it's the thing that tells us
+ to read the next line. */
+ if (*lp == '\0')
+ {
+ quotednl = TRUE;
+ continue;
+ }
+ lp++;
+ c = ' ';
+ }
+ else if (incomm)
+ {
+ switch (c)
+ {
+ case '*':
+ if (*lp == '/')
+ {
+ c = *lp++;
+ incomm = FALSE;
+ }
+ break;
+ case '\0':
+ /* Newlines inside comments do not end macro definitions in
+ traditional cpp. */
+ CNL_SAVE_DEFINEDEF ();
+ break;
+ }
+ continue;
+ }
+ else if (inquote)
+ {
+ switch (c)
+ {
+ case '"':
+ inquote = FALSE;
+ break;
+ case '\0':
+ /* Newlines inside strings do not end macro definitions
+ in traditional cpp, even though compilers don't
+ usually accept them. */
+ CNL_SAVE_DEFINEDEF ();
+ break;
+ }
+ continue;
+ }
+ else if (inchar)
+ {
+ switch (c)
+ {
+ case '\0':
+ /* Hmmm, something went wrong. */
+ CNL ();
+ /* FALLTHRU */
+ case '\'':
+ inchar = FALSE;
+ break;
+ }
+ continue;
+ }
+ else
+ switch (c)
+ {
+ case '"':
+ inquote = TRUE;
+ if (fvdef != finlist && fvdef != fignore && fvdef !=vignore)
+ fvdef = fvnone;
+ continue;
+ case '\'':
+ inchar = TRUE;
+ if (fvdef != finlist && fvdef != fignore && fvdef !=vignore)
+ fvdef = fvnone;
+ continue;
+ case '/':
+ if (*lp == '*')
+ {
+ lp++;
+ incomm = TRUE;
+ continue;
+ }
+ else if (/* cplpl && */ *lp == '/')
+ {
+ c = '\0';
+ break;
+ }
+ else
+ break;
+ case '%':
+ if ((c_ext & YACC) && *lp == '%')
+ {
+ /* entering or exiting rules section in yacc file */
+ lp++;
+ definedef = dnone; fvdef = fvnone;
+ typdef = tnone; structdef = snone;
+ next_token_is_func = FALSE;
+ midtoken = inquote = inchar = incomm = quotednl = FALSE;
+ cblev = 0;
+ yacc_rules = !yacc_rules;
+ continue;
+ }
+ else
+ break;
+ case '#':
+ if (definedef == dnone)
+ {
+ char *cp;
+ bool cpptoken = TRUE;
+
+ /* Look back on this line. If all blanks, or nonblanks
+ followed by an end of comment, this is a preprocessor
+ token. */
+ for (cp = newlb.buffer; cp < lp-1; cp++)
+ if (!iswhite (*cp))
+ {
+ if (*cp == '*' && *(cp+1) == '/')
+ {
+ cp++;
+ cpptoken = TRUE;
+ }
+ else
+ cpptoken = FALSE;
+ }
+ if (cpptoken)
+ definedef = dsharpseen;
+ } /* if (definedef == dnone) */
+
+ continue;
+ } /* switch (c) */
+
+
+ /* Consider token only if some complicated conditions are satisfied. */
+ if ((definedef != dnone
+ || (cblev == 0 && structdef != scolonseen)
+ || (cblev == 1 && cplpl && structdef == sinbody)
+ || (structdef == sinbody && structtype == st_C_enum))
+ && typdef != tignore
+ && definedef != dignorerest
+ && fvdef != finlist)
+ {
+ if (midtoken)
+ {
+ if (endtoken (c))
+ {
+ if (c == ':' && cplpl && *lp == ':' && begtoken(*(lp + 1)))
+ {
+ /*
+ * This handles :: in the middle, but not at the
+ * beginning of an identifier.
+ */
+ lp += 2;
+ toklen += 3;
+#ifdef OO_BROWSER
+ set_construct(C_METHOD);
+#endif
+ }
+ else
+ {
+ bool funorvar = FALSE;
+
+ if (yacc_rules
+ || consider_token (newlb.buffer + tokoff, toklen, c,
+ c_ext, cblev, parlev, &funorvar))
+ {
+ tok.named = FALSE;
+ if (structdef == sinbody
+ && definedef == dnone
+ && funorvar)
+ /* function or var defined in C++ class body */
+ {
+ int len = strlen (structtag) + qlen + toklen;
+ grow_linebuffer (&token_name, len + 1);
+ strcpy (token_name.buffer, structtag);
+ strcat (token_name.buffer, qualifier);
+ strncat (token_name.buffer,
+ newlb.buffer + tokoff, toklen);
+ token_name.len = len;
+ tok.named = TRUE;
+#ifdef OO_BROWSER
+ oo_browser_construct = C_METHOD;
+#endif
+ }
+ else if (objdef == ocatseen)
+ /* Objective C category */
+ {
+ int len = strlen (objtag) + 2 + toklen;
+ grow_linebuffer (&token_name, len + 1);
+ strcpy (token_name.buffer, objtag);
+ strcat (token_name.buffer, "(");
+ strncat (token_name.buffer,
+ newlb.buffer + tokoff, toklen);
+ strcat (token_name.buffer, ")");
+ token_name.len = len;
+ tok.named = TRUE;
+#ifdef OO_BROWSER
+ oo_browser_construct = C_OBJC;
+#endif
+ }
+ else if (objdef == omethodtag
+ || objdef == omethodparm)
+ /* Objective C method */
+ {
+ tok.named = TRUE;
+#ifdef OO_BROWSER
+ oo_browser_construct = C_OBJC;
+#endif
+ }
+ else
+ {
+ grow_linebuffer (&token_name, toklen + 1);
+ strncpy (token_name.buffer,
+ newlb.buffer + tokoff, toklen);
+ token_name.buffer[toklen] = '\0';
+ token_name.len = toklen;
+ /* Name macros. */
+ tok.named
+ = (structdef == stagseen
+ || typdef == tend
+#ifdef OO_BROWSER
+ /* Also name #define constants,
+ enumerations and enum_labels.
+ Conditionalize `funorvar' reference
+ here or #defines will appear without
+ their #names.
+ -- Bob Weiner, Altrasoft, 4/25/1998 */
+ || ((oo_browser_format || funorvar)
+ && definedef == dignorerest)
+ || (oo_browser_format
+ && (oo_browser_construct == C_ENUMERATION
+ || oo_browser_construct == C_ENUM_LABEL))
+#else
+ || (funorvar
+ && definedef == dignorerest)
+#endif
+ );
+ }
+ tok.lineno = lineno;
+ tok.linelen = tokoff + toklen + 1;
+ tok.buffer = newlb.buffer;
+ tok.linepos = newlinepos;
+ tok.valid = TRUE;
+
+ if (definedef == dnone
+ && (fvdef == fvnameseen
+ || structdef == stagseen
+ || typdef == tend
+ || objdef != onone))
+ {
+ if (current_lb_is_new)
+ switch_line_buffers ();
+ }
+ else
+ make_C_tag (funorvar);
+ }
+ midtoken = FALSE;
+ }
+ } /* if (endtoken (c)) */
+ else if (intoken (c))
+ {
+ toklen++;
+ continue;
+ }
+ } /* if (midtoken) */
+ else if (begtoken (c))
+ {
+ switch (definedef)
+ {
+ case dnone:
+ switch (fvdef)
+ {
+ case fstartlist:
+ fvdef = finlist;
+ continue;
+ case flistseen:
+#ifdef OO_BROWSER
+ set_construct(C_MACRO);
+#endif
+ make_C_tag (TRUE); /* a function */
+ fvdef = fignore;
+ break;
+ case fvnameseen:
+ fvdef = fvnone;
+ break;
+ }
+ if (structdef == stagseen && !cjava)
+ structdef = snone;
+ break;
+ case dsharpseen:
+ savetok = tok;
+ }
+ if (!yacc_rules || lp == newlb.buffer + 1)
+ {
+ tokoff = lp - 1 - newlb.buffer;
+ toklen = 1;
+ midtoken = TRUE;
+ }
+ continue;
+ } /* if (begtoken) */
+ } /* if must look at token */
+
+
+ /* Detect end of line, colon, comma, semicolon and various braces
+ after having handled a token.*/
+ switch (c)
+ {
+ case ':':
+ if (definedef != dnone)
+ break;
+ switch (objdef)
+ {
+ case otagseen:
+ objdef = oignore;
+ make_C_tag (TRUE); /* an Objective C class */
+ break;
+ case omethodtag:
+ case omethodparm:
+ objdef = omethodcolon;
+ methodlen += 1;
+ grow_linebuffer (&token_name, methodlen + 1);
+ strcat (token_name.buffer, ":");
+ token_name.len = methodlen;
+ break;
+ }
+ if (structdef == stagseen)
+ structdef = scolonseen;
+ else
+ switch (fvdef)
+ {
+ case fvnameseen:
+ if (yacc_rules)
+ {
+ make_C_tag (FALSE); /* a yacc function */
+ fvdef = fignore;
+ }
+ break;
+ case fstartlist:
+ fvdef = fvnone;
+ break;
+ }
+ break;
+ case ';':
+ if (definedef != dnone)
+ break;
+ if (cblev == 0)
+ switch (typdef)
+ {
+ case tend:
+#ifdef OO_BROWSER
+ set_construct(C_TYPE);
+#endif
+ make_C_tag (FALSE); /* a typedef */
+ /* FALLTHRU */
+ default:
+ typdef = tnone;
+ }
+ switch (fvdef)
+ {
+ case fignore:
+ break;
+ case fvnameseen:
+ if ((globals && cblev == 0) || (members && cblev == 1))
+#ifndef OO_BROWSER
+ make_C_tag (FALSE); /* a variable */
+#else
+/* if (constantypedefs && structdef == snone)*/
+ {
+ tok.named = TRUE;
+ switch (structtype)
+ {
+ case st_C_enum:
+ set_construct(C_ENUMERATION);
+ break;
+ case st_C_class:
+ set_construct(C_CLASS);
+ break;
+ default:
+ set_construct(C_VARIABLE);
+ break;
+ }
+ make_C_tag (FALSE);
+ /* Force reset of st_C_enum structtype value. */
+ structtype = st_none;
+ }
+#endif
+ /* FALLTHRU */
+ default:
+ fvdef = fvnone;
+ /* The following instruction invalidates the token.
+ Probably the token should be invalidated in all
+ other cases where some state machine is reset. */
+ tok.valid = FALSE;
+ }
+ if (structdef == stagseen)
+ structdef = snone;
+ break;
+ case ',':
+ if (definedef != dnone)
+ break;
+ switch (objdef)
+ {
+ case omethodtag:
+ case omethodparm:
+ make_C_tag (TRUE); /* an Objective C method */
+ objdef = oinbody;
+ break;
+ }
+ switch (fvdef)
+ {
+ case finlist:
+ case fignore:
+ case vignore:
+ break;
+ case fvnameseen:
+ if ((globals && cblev == 0) || (members && cblev == 1))
+ make_C_tag (FALSE); /* a variable */
+ break;
+ default:
+ fvdef = fvnone;
+ }
+ if (structdef == stagseen)
+ structdef = snone;
+ break;
+ case '[':
+ if (definedef != dnone)
+ break;
+ if (cblev == 0 && typdef == tend)
+ {
+#ifdef OO_BROWSER
+ set_construct(C_TYPE);
+#endif
+ typdef = tignore;
+ make_C_tag (FALSE); /* a typedef */
+ break;
+ }
+ switch (fvdef)
+ {
+ case finlist:
+ case fignore:
+ case vignore:
+ break;
+ case fvnameseen:
+#ifndef OO_BROWSER
+ if ((globals && cblev == 0) || (members && cblev == 1))
+ make_C_tag (FALSE); /* a variable */
+#else
+ if (constantypedefs && structdef == snone)
+ {
+ tok.named = TRUE;
+ switch (structtype)
+ {
+ case st_C_enum:
+ set_construct(C_ENUMERATION);
+ break;
+ case st_C_class:
+ set_construct(C_CLASS);
+ break;
+ default:
+ set_construct(C_VARIABLE);
+ break;
+ }
+ make_C_tag (FALSE);
+ /* Force reset of st_C_enum structtype value. */
+ structtype = st_none;
+ }
+#endif
+ /* FALLTHRU */
+ default:
+ fvdef = fvnone;
+ }
+ if (structdef == stagseen)
+ structdef = snone;
+ break;
+ case '(':
+ if (definedef != dnone)
+ break;
+ if (objdef == otagseen && parlev == 0)
+ objdef = oparenseen;
+ switch (fvdef)
+ {
+ case fvnone:
+ switch (typdef)
+ {
+ case ttypedseen:
+ case tend:
+ if (tok.valid && *lp != '*')
+ {
+ /* This handles constructs like:
+ typedef void OperatorFun (int fun); */
+ typdef = tignore;
+#ifdef OO_BROWSER
+ set_construct(C_TYPE);
+#endif
+ make_C_tag (FALSE);
+ }
+ break;
+ } /* switch (typdef) */
+ break;
+ case fvnameseen:
+ fvdef = fstartlist;
+ break;
+ case flistseen:
+ fvdef = finlist;
+ break;
+ }
+ parlev++;
+ break;
+ case ')':
+ if (definedef != dnone)
+ break;
+ if (objdef == ocatseen && parlev == 1)
+ {
+ make_C_tag (TRUE); /* an Objective C category */
+ objdef = oignore;
+ }
+ if (--parlev == 0)
+ {
+ switch (fvdef)
+ {
+ case fstartlist:
+ case finlist:
+ fvdef = flistseen;
+ break;
+ }
+ if (cblev == 0 && typdef == tend)
+ {
+#ifdef OO_BROWSER
+ set_construct(C_TYPE);
+#endif
+ typdef = tignore;
+ make_C_tag (FALSE); /* a typedef */
+ }
+ }
+ else if (parlev < 0) /* can happen due to ill-conceived #if's. */
+ parlev = 0;
+ break;
+ case '{':
+ if (definedef != dnone)
+ break;
+ if (typdef == ttypedseen)
+ typdef = tinbody;
+ switch (structdef)
+ {
+ case skeyseen: /* unnamed struct */
+ structdef = sinbody;
+ structtag = "_anonymous_";
+ break;
+ case stagseen:
+ case scolonseen: /* named struct */
+ structdef = sinbody;
+ make_C_tag (FALSE); /* a struct */
+ break;
+ }
+ switch (fvdef)
+ {
+ case flistseen:
+#ifdef OO_BROWSER
+ set_construct(C_FUNCTION);
+ /* Ensure function name is recorded.
+ -- Bob Weiner, Altrasoft */
+ tok.named = TRUE;
+#endif
+ make_C_tag (TRUE); /* a function */
+ /* FALLTHRU */
+ case fignore:
+ fvdef = fvnone;
+ break;
+ case fvnone:
+ switch (objdef)
+ {
+ case otagseen:
+ make_C_tag (TRUE); /* an Objective C class */
+ objdef = oignore;
+ break;
+ case omethodtag:
+ case omethodparm:
+ make_C_tag (TRUE); /* an Objective C method */
+ objdef = oinbody;
+ break;
+ default:
+ /* Neutralize `extern "C" {' grot. */
+ if (cblev == 0 && structdef == snone && typdef == tnone)
+ cblev = -1;
+ }
+ }
+ cblev++;
+ break;
+ case '*':
+ if (definedef != dnone)
+ break;
+ if (fvdef == fstartlist)
+ fvdef = fvnone; /* avoid tagging `foo' in `foo (*bar()) ()' */
+ break;
+ case '}':
+ if (definedef != dnone)
+ break;
+ if (!noindentypedefs && lp == newlb.buffer + 1)
+ {
+ cblev = 0; /* reset curly brace level if first column */
+ parlev = 0; /* also reset paren level, just in case... */
+ }
+ else if (cblev > 0)
+ cblev--;
+ if (cblev == 0)
+ {
+ if (typdef == tinbody)
+ typdef = tend;
+ /* Memory leakage here: the string pointed by structtag is
+ never released, because I fear to miss something and
+ break things while freeing the area. The amount of
+ memory leaked here is the sum of the lengths of the
+ struct tags.
+ if (structdef == sinbody)
+ free (structtag); */
+
+ structdef = snone;
+ structtag = "<error>";
+#ifdef OO_BROWSER
+ /* Next line added to avoid any state carryover between
+ functions. -- Bob Weiner, Altrasoft, 11/19/1997 */
+ fvdef = fvnone; oo_browser_construct = C_NULL;
+#endif
+ }
+ break;
+ case '=':
+ if (definedef != dnone)
+ break;
+#ifdef OO_BROWSER
+ {
+ int is_method = 0;
+#endif
+ switch (fvdef)
+ {
+ case finlist:
+ case fignore:
+ case vignore:
+ break;
+ case fvnameseen:
+ if ((globals && cblev == 0) || (members && cblev == 1))
+#ifndef OO_BROWSER
+ make_C_tag (FALSE); /* a variable */
+#else
+ {
+ tok.named = TRUE;
+ switch (structtype)
+ {
+ case st_C_enum:
+ set_construct(C_ENUMERATION);
+ break;
+ case st_C_class:
+ set_construct(C_CLASS);
+ break;
+ default:
+ /* a global variable */
+ set_construct(C_VARIABLE);
+ break;
+ }
+
+ /* ootags categorizes each tag found whereas etags doesn't.
+ Set the is_method flag if this tag has been marked as
+ such by an earlier section of code.
+ -- Steve Baur, Altrasoft, 5/7/1998 */
+ is_method = (oo_browser_construct == C_METHOD);
+
+ make_C_tag (FALSE);
+ /* Force reset of st_C_enum structtype value. */
+ structtype = st_none;
+ }
+#endif
+ /* FALLTHRU */
+ default:
+#ifdef OO_BROWSER
+ fvdef = is_method ? fignore : vignore;
+#else
+ fvdef = vignore;
+#endif
+ }
+#ifdef OO_BROWSER
+ }
+#endif
+ break;
+ case '+':
+ case '-':
+ if (objdef == oinbody && cblev == 0)
+ {
+ objdef = omethodsign;
+ break;
+ }
+ /* FALLTHRU */
+ case '#': case '~': case '&': case '%': case '/': case '|':
+ case '^': case '!': case '<': case '>': case '.': case '?': case ']':
+ if (definedef != dnone)
+ break;
+#ifdef OO_BROWSER
+ if (!cplpl)
+ {
+#endif
+ /* The above characters cannot follow a function tag in C, so
+ unmark this as a function entry. For C++, these characters
+ may follow an `operator' function construct, so skip the
+ unmarking conditional below.
+ -- Steve Baur, Altrasoft, 5/7/1998 */
+ if (fvdef != finlist && fvdef != fignore && fvdef != vignore)
+ fvdef = fvnone;
+#ifdef OO_BROWSER
+ }
+#endif
+ break;
+ case '\0':
+ if (objdef == otagseen)
+ {
+ make_C_tag (TRUE); /* an Objective C class */
+ objdef = oignore;
+ }
+ /* If a macro spans multiple lines don't reset its state. */
+ if (quotednl)
+ CNL_SAVE_DEFINEDEF ();
+ else
+ CNL ();
+ break;
+ } /* switch (c) */
+
+ } /* while not eof */
+}
+
+/*
+ * Process either a C++ file or a C file depending on the setting
+ * of a global flag.
+ */
+void
+default_C_entries (inf)
+ FILE *inf;
+{
+ C_entries (cplusplus ? C_PLPL : 0, inf);
+}
+
+/* Always do plain ANSI C. */
+void
+plain_C_entries (inf)
+ FILE *inf;
+{
+ C_entries (0, inf);
+}
+
+/* Always do C++. */
+void
+Cplusplus_entries (inf)
+ FILE *inf;
+{
+ C_entries (C_PLPL, inf);
+}
+
+/* Always do Java. */
+void
+Cjava_entries (inf)
+ FILE *inf;
+{
+ C_entries (C_JAVA, inf);
+}
+
+/* Always do C*. */
+void
+Cstar_entries (inf)
+ FILE *inf;
+{
+ C_entries (C_STAR, inf);
+}
+
+/* Always do Yacc. */
+void
+Yacc_entries (inf)
+ FILE *inf;
+{
+ C_entries (YACC, inf);
+}
+\f
+/* A useful macro. */
+#define LOOP_ON_INPUT_LINES(file_pointer, line_buffer, char_pointer) \
+ for (lineno = charno = 0; /* loop initialization */ \
+ !feof (file_pointer) /* loop test */ \
+ && (lineno++, /* instructions at start of loop */ \
+ linecharno = charno, \
+ charno += readline (&line_buffer, file_pointer), \
+ char_pointer = lb.buffer, \
+ TRUE); \
+ )
+
+
+/*
+ * Read a file, but do no processing. This is used to do regexp
+ * matching on files that have no language defined.
+ */
+void
+just_read_file (inf)
+ FILE *inf;
+{
+ register char *dummy;
+
+ LOOP_ON_INPUT_LINES (inf, lb, dummy)
+ continue;
+}
+\f
+/* Fortran parsing */
+
+bool tail PP ((char *cp));
+bool
+tail (cp)
+ char *cp;
+{
+ register int len = 0;
+
+ while (*cp && lowcase(*cp) == lowcase(dbp[len]))
+ cp++, len++;
+ if (*cp == '\0' && !intoken(dbp[len]))
+ {
+ dbp += len;
+ return TRUE;
+ }
+ return FALSE;
+}
+
+void
+takeprec ()
+{
+ dbp = skip_spaces (dbp);
+ if (*dbp != '*')
+ return;
+ dbp++;
+ dbp = skip_spaces (dbp);
+ if (strneq (dbp, "(*)", 3))
+ {
+ dbp += 3;
+ return;
+ }
+ if (!isdigit (*dbp))
+ {
+ --dbp; /* force failure */
+ return;
+ }
+ do
+ dbp++;
+ while (isdigit (*dbp));
+}
+
+void getit PP ((FILE *inf));
+void
+getit (inf)
+ FILE *inf;
+{
+ register char *cp;
+
+ dbp = skip_spaces (dbp);
+ if (*dbp == '\0')
+ {
+ lineno++;
+ linecharno = charno;
+ charno += readline (&lb, inf);
+ dbp = lb.buffer;
+ if (dbp[5] != '&')
+ return;
+ dbp += 6;
+ dbp = skip_spaces (dbp);
+ }
+ if (!isalpha (*dbp)
+ && *dbp != '_'
+ && *dbp != '$')
+ return;
+ for (cp = dbp + 1; *cp && intoken (*cp); cp++)
+ continue;
+ pfnote ((CTAGS) ? savenstr (dbp, cp-dbp) : NULL, TRUE,
+ lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+}
+
+
+void
+Fortran_functions (inf)
+ FILE *inf;
+{
+ LOOP_ON_INPUT_LINES (inf, lb, dbp)
+ {
+ if (*dbp == '%')
+ dbp++; /* Ratfor escape to fortran */
+ dbp = skip_spaces (dbp);
+ if (*dbp == '\0')
+ continue;
+ switch (lowcase (*dbp))
+ {
+ case 'i':
+ if (tail ("integer"))
+ takeprec ();
+ break;
+ case 'r':
+ if (tail ("real"))
+ takeprec ();
+ break;
+ case 'l':
+ if (tail ("logical"))
+ takeprec ();
+ break;
+ case 'c':
+ if (tail ("complex") || tail ("character"))
+ takeprec ();
+ break;
+ case 'd':
+ if (tail ("double"))
+ {
+ dbp = skip_spaces (dbp);
+ if (*dbp == '\0')
+ continue;
+ if (tail ("precision"))
+ break;
+ continue;
+ }
+ break;
+ }
+ dbp = skip_spaces (dbp);
+ if (*dbp == '\0')
+ continue;
+ switch (lowcase (*dbp))
+ {
+ case 'f':
+ if (tail ("function"))
+ getit (inf);
+ continue;
+ case 's':
+ if (tail ("subroutine"))
+ getit (inf);
+ continue;
+ case 'e':
+ if (tail ("entry"))
+ getit (inf);
+ continue;
+ case 'p':
+ if (tail ("program"))
+ {
+ getit (inf);
+ continue;
+ }
+ if (tail ("procedure"))
+ getit (inf);
+ continue;
+ }
+ }
+}
+\f
+/*
+ * Bob Weiner, Motorola Inc., 4/3/94
+ * Unix and microcontroller assembly tag handling
+ * look for '^[a-zA-Z_.$][a-zA_Z0-9_.$]*[: ^I^J]'
+ */
+void
+Asm_labels (inf)
+ FILE *inf;
+{
+ register char *cp;
+
+ LOOP_ON_INPUT_LINES (inf, lb, cp)
+ {
+ /* If first char is alphabetic or one of [_.$], test for colon
+ following identifier. */
+ if (isalpha (*cp) || *cp == '_' || *cp == '.' || *cp == '$')
+ {
+ /* Read past label. */
+ cp++;
+ while (isalnum (*cp) || *cp == '_' || *cp == '.' || *cp == '$')
+ cp++;
+ if (*cp == ':' || isspace (*cp))
+ {
+ /* Found end of label, so copy it and add it to the table. */
+ pfnote ((CTAGS) ? savenstr(lb.buffer, cp-lb.buffer) : NULL, TRUE,
+ lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+ }
+ }
+ }
+}
+\f
+/*
+ * Perl support by Bart Robinson <lomew@cs.utah.edu>
+ * enhanced by Michael Ernst <mernst@alum.mit.edu>
+ * Perl sub names: look for /^sub[ \t\n]+[^ \t\n{]+/
+ * Perl variable names: /^(my|local).../
+ */
+void
+Perl_functions (inf)
+ FILE *inf;
+{
+ register char *cp;
+
+ LOOP_ON_INPUT_LINES (inf, lb, cp)
+ {
+ if (*cp++ == 's'
+ && *cp++ == 'u'
+ && *cp++ == 'b' && isspace (*cp++))
+ {
+ cp = skip_spaces (cp);
+ if (*cp != '\0')
+ {
+ while (*cp != '\0'
+ && !isspace (*cp) && *cp != '{' && *cp != '(')
+ cp++;
+ pfnote ((CTAGS) ? savenstr(lb.buffer, cp-lb.buffer) : NULL, TRUE,
+ lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+ }
+ }
+ else if (globals /* only if tagging global vars is enabled */
+ && ((cp = lb.buffer,
+ *cp++ == 'm'
+ && *cp++ == 'y')
+ || (cp = lb.buffer,
+ *cp++ == 'l'
+ && *cp++ == 'o'
+ && *cp++ == 'c'
+ && *cp++ == 'a'
+ && *cp++ == 'l'))
+ && (*cp == '(' || isspace (*cp)))
+ {
+ /* After "my" or "local", but before any following paren or space. */
+ char *varname = NULL;
+
+ cp = skip_spaces (cp);
+ if (*cp == '$' || *cp == '@' || *cp == '%')
+ {
+ char* varstart = ++cp;
+ while (isalnum (*cp) || *cp == '_')
+ cp++;
+ varname = savenstr (varstart, cp-varstart);
+ }
+ else
+ {
+ /* Should be examining a variable list at this point;
+ could insist on seeing an open parenthesis. */
+ while (*cp != '\0' && *cp != ';' && *cp != '=' && *cp != ')')
+ cp++;
+ }
+
+ /* Perhaps I should back cp up one character, so the TAGS table
+ doesn't mention (and so depend upon) the following char. */
+ pfnote ((CTAGS) ? savenstr (lb.buffer, cp-lb.buffer) : varname,
+ FALSE, lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+ }
+ }
+}
+\f
+/*
+ * Python support by Eric S. Raymond <esr@thyrsus.com>
+ * Look for /^def[ \t\n]+[^ \t\n(:]+/ or /^class[ \t\n]+[^ \t\n(:]+/
+ */
+void
+Python_functions (inf)
+ FILE *inf;
+{
+ register char *cp;
+
+ LOOP_ON_INPUT_LINES (inf, lb, cp)
+ {
+ if (*cp++ == 'd'
+ && *cp++ == 'e'
+ && *cp++ == 'f' && isspace (*cp++))
+ {
+ cp = skip_spaces (cp);
+ while (*cp != '\0' && !isspace (*cp) && *cp != '(' && *cp != ':')
+ cp++;
+ pfnote ((char *) NULL, TRUE,
+ lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+ }
+
+ cp = lb.buffer;
+ if (*cp++ == 'c'
+ && *cp++ == 'l'
+ && *cp++ == 'a'
+ && *cp++ == 's'
+ && *cp++ == 's' && isspace (*cp++))
+ {
+ cp = skip_spaces (cp);
+ while (*cp != '\0' && !isspace (*cp) && *cp != '(' && *cp != ':')
+ cp++;
+ pfnote ((char *) NULL, TRUE,
+ lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+ }
+ }
+}
+\f
+/* Idea by Corny de Souza
+ * Cobol tag functions
+ * We could look for anything that could be a paragraph name.
+ * i.e. anything that starts in column 8 is one word and ends in a full stop.
+ */
+void
+Cobol_paragraphs (inf)
+ FILE *inf;
+{
+ register char *bp, *ep;
+
+ LOOP_ON_INPUT_LINES (inf, lb, bp)
+ {
+ if (lb.len < 9)
+ continue;
+ bp += 8;
+
+ /* If eoln, compiler option or comment ignore whole line. */
+ if (bp[-1] != ' ' || !isalnum (bp[0]))
+ continue;
+
+ for (ep = bp; isalnum (*ep) || *ep == '-'; ep++)
+ continue;
+ if (*ep++ == '.')
+ pfnote ((CTAGS) ? savenstr (bp, ep-bp) : NULL, TRUE,
+ lb.buffer, ep - lb.buffer + 1, lineno, linecharno);
+ }
+}
+\f
+/* Added by Mosur Mohan, 4/22/88 */
+/* Pascal parsing */
+
+/*
+ * Locates tags for procedures & functions. Doesn't do any type- or
+ * var-definitions. It does look for the keyword "extern" or
+ * "forward" immediately following the procedure statement; if found,
+ * the tag is skipped.
+ */
+void
+Pascal_functions (inf)
+ FILE *inf;
+{
+ linebuffer tline; /* mostly copied from C_entries */
+ long save_lcno;
+ int save_lineno, save_len;
+ char c, *cp, *namebuf;
+
+ bool /* each of these flags is TRUE iff: */
+ incomment, /* point is inside a comment */
+ inquote, /* point is inside '..' string */
+ get_tagname, /* point is after PROCEDURE/FUNCTION
+ keyword, so next item = potential tag */
+ found_tag, /* point is after a potential tag */
+ inparms, /* point is within parameter-list */
+ verify_tag; /* point has passed the parm-list, so the
+ next token will determine whether this
+ is a FORWARD/EXTERN to be ignored, or
+ whether it is a real tag */
+
+ save_lcno = save_lineno = save_len = 0; /* keep compiler quiet */
+ namebuf = NULL; /* keep compiler quiet */
+ lineno = 0;
+ charno = 0;
+ dbp = lb.buffer;
+ *dbp = '\0';
+ initbuffer (&tline);
+
+ incomment = inquote = FALSE;
+ found_tag = FALSE; /* have a proc name; check if extern */
+ get_tagname = FALSE; /* have found "procedure" keyword */
+ inparms = FALSE; /* found '(' after "proc" */
+ verify_tag = FALSE; /* check if "extern" is ahead */
+
+
+ while (!feof (inf)) /* long main loop to get next char */
+ {
+ c = *dbp++;
+ if (c == '\0') /* if end of line */
+ {
+ lineno++;
+ linecharno = charno;
+ charno += readline (&lb, inf);
+ dbp = lb.buffer;
+ if (*dbp == '\0')
+ continue;
+ if (!((found_tag && verify_tag)
+ || get_tagname))
+ c = *dbp++; /* only if don't need *dbp pointing
+ to the beginning of the name of
+ the procedure or function */
+ }
+ if (incomment)
+ {
+ if (c == '}') /* within { } comments */
+ incomment = FALSE;
+ else if (c == '*' && *dbp == ')') /* within (* *) comments */
+ {
+ dbp++;
+ incomment = FALSE;
+ }
+ continue;
+ }
+ else if (inquote)
+ {
+ if (c == '\'')
+ inquote = FALSE;
+ continue;
+ }
+ else
+ switch (c)
+ {
+ case '\'':
+ inquote = TRUE; /* found first quote */
+ continue;
+ case '{': /* found open { comment */
+ incomment = TRUE;
+ continue;
+ case '(':
+ if (*dbp == '*') /* found open (* comment */
+ {
+ incomment = TRUE;
+ dbp++;
+ }
+ else if (found_tag) /* found '(' after tag, i.e., parm-list */
+ inparms = TRUE;
+ continue;
+ case ')': /* end of parms list */
+ if (inparms)
+ inparms = FALSE;
+ continue;
+ case ';':
+ if (found_tag && !inparms) /* end of proc or fn stmt */
+ {
+ verify_tag = TRUE;
+ break;
+ }
+ continue;
+ }
+ if (found_tag && verify_tag && (*dbp != ' '))
+ {
+ /* check if this is an "extern" declaration */
+ if (*dbp == '\0')
+ continue;
+ if (lowcase (*dbp == 'e'))
+ {
+ if (tail ("extern")) /* superfluous, really! */
+ {
+ found_tag = FALSE;
+ verify_tag = FALSE;
+ }
+ }
+ else if (lowcase (*dbp) == 'f')
+ {
+ if (tail ("forward")) /* check for forward reference */
+ {
+ found_tag = FALSE;
+ verify_tag = FALSE;
+ }
+ }
+ if (found_tag && verify_tag) /* not external proc, so make tag */
+ {
+ found_tag = FALSE;
+ verify_tag = FALSE;
+ pfnote (namebuf, TRUE,
+ tline.buffer, save_len, save_lineno, save_lcno);
+ continue;
+ }
+ }
+ if (get_tagname) /* grab name of proc or fn */
+ {
+ if (*dbp == '\0')
+ continue;
+
+ /* save all values for later tagging */
+ grow_linebuffer (&tline, lb.len + 1);
+ strcpy (tline.buffer, lb.buffer);
+ save_lineno = lineno;
+ save_lcno = linecharno;
+
+ /* grab block name */
+ for (cp = dbp + 1; *cp != '\0' && !endtoken (*cp); cp++)
+ continue;
+ namebuf = (CTAGS) ? savenstr (dbp, cp-dbp) : NULL;
+ dbp = cp; /* set dbp to e-o-token */
+ save_len = dbp - lb.buffer + 1;
+ get_tagname = FALSE;
+ found_tag = TRUE;
+ continue;
+
+ /* and proceed to check for "extern" */
+ }
+ else if (!incomment && !inquote && !found_tag)
+ {
+ /* check for proc/fn keywords */
+ switch (lowcase (c))
+ {
+ case 'p':
+ if (tail ("rocedure")) /* c = 'p', dbp has advanced */
+ get_tagname = TRUE;
+ continue;
+ case 'f':
+ if (tail ("unction"))
+ get_tagname = TRUE;
+ continue;
+ }
+ }
+ } /* while not eof */
+
+ free (tline.buffer);
+}
+\f
+/*
+ * lisp tag functions
+ * look for (def or (DEF, quote or QUOTE
+ */
+int L_isdef PP ((char *strp));
+int
+L_isdef (strp)
+ register char *strp;
+{
+ return ((strp[1] == 'd' || strp[1] == 'D')
+ && (strp[2] == 'e' || strp[2] == 'E')
+ && (strp[3] == 'f' || strp[3] == 'F'));
+}
+int L_isquote PP ((char *strp));
+int
+L_isquote (strp)
+ register char *strp;
+{
+ return ((*++strp == 'q' || *strp == 'Q')
+ && (*++strp == 'u' || *strp == 'U')
+ && (*++strp == 'o' || *strp == 'O')
+ && (*++strp == 't' || *strp == 'T')
+ && (*++strp == 'e' || *strp == 'E')
+ && isspace (*++strp));
+}
+
+void L_getit PP ((void));
+void
+L_getit ()
+{
+ register char *cp;
+
+ if (*dbp == '\'') /* Skip prefix quote */
+ dbp++;
+ else if (*dbp == '(')
+ {
+ if (L_isquote (dbp))
+ dbp += 7; /* Skip "(quote " */
+ else
+ dbp += 1; /* Skip "(" before name in (defstruct (foo)) */
+ dbp = skip_spaces (dbp);
+ }
+
+ for (cp = dbp /*+1*/;
+ *cp != '\0' && *cp != '(' && *cp != ' ' && *cp != ')';
+ cp++)
+ continue;
+ if (cp == dbp)
+ return;
+
+ pfnote ((CTAGS) ? savenstr (dbp, cp-dbp) : NULL, TRUE,
+ lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+}
+
+void
+Lisp_functions (inf)
+ FILE *inf;
+{
+ LOOP_ON_INPUT_LINES (inf, lb, dbp)
+ {
+ if (dbp[0] == '(')
+ {
+ if (L_isdef (dbp))
+ {
+ dbp = skip_non_spaces (dbp);
+ dbp = skip_spaces (dbp);
+ L_getit ();
+ }
+ else
+ {
+ /* Check for (foo::defmumble name-defined ... */
+ do
+ dbp++;
+ while (*dbp != '\0' && !isspace (*dbp)
+ && *dbp != ':' && *dbp != '(' && *dbp != ')');
+ if (*dbp == ':')
+ {
+ do
+ dbp++;
+ while (*dbp == ':');
+
+ if (L_isdef (dbp - 1))
+ {
+ dbp = skip_non_spaces (dbp);
+ dbp = skip_spaces (dbp);
+ L_getit ();
+ }
+ }
+ }
+ }
+ }
+}
+\f
+/*
+ * Postscript tag functions
+ * Just look for lines where the first character is '/'
+ * Richard Mlynarik <mly@adoc.xerox.com>
+ */
+void
+Postscript_functions (inf)
+ FILE *inf;
+{
+ register char *bp, *ep;
+
+ LOOP_ON_INPUT_LINES (inf, lb, bp)
+ {
+ if (bp[0] == '/')
+ {
+ for (ep = bp+1;
+ *ep != '\0' && *ep != ' ' && *ep != '{';
+ ep++)
+ continue;
+ pfnote ((CTAGS) ? savenstr (bp, ep-bp) : NULL, TRUE,
+ lb.buffer, ep - lb.buffer + 1, lineno, linecharno);
+ }
+ }
+}
+
+\f
+/*
+ * Scheme tag functions
+ * look for (def... xyzzy
+ * look for (def... (xyzzy
+ * look for (def ... ((...(xyzzy ....
+ * look for (set! xyzzy
+ */
+
+void get_scheme PP ((void));
+
+void
+Scheme_functions (inf)
+ FILE *inf;
+{
+ LOOP_ON_INPUT_LINES (inf, lb, dbp)
+ {
+ if (dbp[0] == '('
+ && (dbp[1] == 'D' || dbp[1] == 'd')
+ && (dbp[2] == 'E' || dbp[2] == 'e')
+ && (dbp[3] == 'F' || dbp[3] == 'f'))
+ {
+ dbp = skip_non_spaces (dbp);
+ /* Skip over open parens and white space */
+ while (isspace (*dbp) || *dbp == '(')
+ dbp++;
+ get_scheme ();
+ }
+ if (dbp[0] == '('
+ && (dbp[1] == 'S' || dbp[1] == 's')
+ && (dbp[2] == 'E' || dbp[2] == 'e')
+ && (dbp[3] == 'T' || dbp[3] == 't')
+ && (dbp[4] == '!' || dbp[4] == '!')
+ && (isspace (dbp[5])))
+ {
+ dbp = skip_non_spaces (dbp);
+ dbp = skip_spaces (dbp);
+ get_scheme ();
+ }
+ }
+}
+
+void
+get_scheme ()
+{
+ register char *cp;
+
+ if (*dbp == '\0')
+ return;
+ /* Go till you get to white space or a syntactic break */
+ for (cp = dbp + 1;
+ *cp != '\0' && *cp != '(' && *cp != ')' && !isspace (*cp);
+ cp++)
+ continue;
+ pfnote ((CTAGS) ? savenstr (dbp, cp-dbp) : NULL, TRUE,
+ lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+}
+\f
+/* Find tags in TeX and LaTeX input files. */
+
+/* TEX_toktab is a table of TeX control sequences that define tags.
+ Each TEX_tabent records one such control sequence.
+ CONVERT THIS TO USE THE Stab TYPE!! */
+struct TEX_tabent
+{
+ char *name;
+ int len;
+};
+
+struct TEX_tabent *TEX_toktab = NULL; /* Table with tag tokens */
+
+/* Default set of control sequences to put into TEX_toktab.
+ The value of environment var TEXTAGS is prepended to this. */
+
+char *TEX_defenv = "\
+:chapter:section:subsection:subsubsection:eqno:label:ref:cite:bibitem\
+:part:appendix:entry:index";
+
+void TEX_mode PP ((FILE *inf));
+struct TEX_tabent *TEX_decode_env PP ((char *evarname, char *defenv));
+int TEX_Token PP ((char *cp));
+
+char TEX_esc = '\\';
+char TEX_opgrp = '{';
+char TEX_clgrp = '}';
+
+/*
+ * TeX/LaTeX scanning loop.
+ */
+void
+TeX_functions (inf)
+ FILE *inf;
+{
+ char *cp, *lasthit;
+ register int i;
+
+ /* Select either \ or ! as escape character. */
+ TEX_mode (inf);
+
+ /* Initialize token table once from environment. */
+ if (!TEX_toktab)
+ TEX_toktab = TEX_decode_env ("TEXTAGS", TEX_defenv);
+
+ LOOP_ON_INPUT_LINES (inf, lb, cp)
+ {
+ lasthit = cp;
+ /* Look at each esc in line. */
+ while ((cp = etags_strchr (cp, TEX_esc)) != NULL)
+ {
+ if (*++cp == '\0')
+ break;
+ linecharno += cp - lasthit;
+ lasthit = cp;
+ i = TEX_Token (lasthit);
+ if (i >= 0)
+ {
+ /* We seem to include the TeX command in the tag name.
+ register char *p;
+ for (p = lasthit + TEX_toktab[i].len;
+ *p != '\0' && *p != TEX_clgrp;
+ p++)
+ continue; */
+ pfnote (/*savenstr (lasthit, p-lasthit)*/ (char *)NULL, TRUE,
+ lb.buffer, lb.len, lineno, linecharno);
+ break; /* We only tag a line once */
+ }
+ }
+ }
+}
+
+#define TEX_LESC '\\'
+#define TEX_SESC '!'
+#define TEX_cmt '%'
+
+/* Figure out whether TeX's escapechar is '\\' or '!' and set grouping
+ chars accordingly. */
+void
+TEX_mode (inf)
+ FILE *inf;
+{
+ int c;
+
+ while ((c = getc (inf)) != EOF)
+ {
+ /* Skip to next line if we hit the TeX comment char. */
+ if (c == TEX_cmt)
+ while (c != '\n')
+ c = getc (inf);
+ else if (c == TEX_LESC || c == TEX_SESC )
+ break;
+ }
+
+ if (c == TEX_LESC)
+ {
+ TEX_esc = TEX_LESC;
+ TEX_opgrp = '{';
+ TEX_clgrp = '}';
+ }
+ else
+ {
+ TEX_esc = TEX_SESC;
+ TEX_opgrp = '<';
+ TEX_clgrp = '>';
+ }
+ rewind (inf);
+}
+
+/* Read environment and prepend it to the default string.
+ Build token table. */
+struct TEX_tabent *
+TEX_decode_env (evarname, defenv)
+ char *evarname;
+ char *defenv;
+{
+ register char *env, *p;
+
+ struct TEX_tabent *tab;
+ int size, i;
+
+ /* Append default string to environment. */
+ env = getenv (evarname);
+ if (!env)
+ env = defenv;
+ else
+ {
+ char *oldenv = env;
+ env = concat (oldenv, defenv, "");
+ free (oldenv);
+ }
+
+ /* Allocate a token table */
+ for (size = 1, p = env; p;)
+ if ((p = etags_strchr (p, ':')) && *++p != '\0')
+ size++;
+ /* Add 1 to leave room for null terminator. */
+ tab = xnew (size + 1, struct TEX_tabent);
+
+ /* Unpack environment string into token table. Be careful about */
+ /* zero-length strings (leading ':', "::" and trailing ':') */
+ for (i = 0; *env;)
+ {
+ p = etags_strchr (env, ':');
+ if (!p) /* End of environment string. */
+ p = env + strlen (env);
+ if (p - env > 0)
+ { /* Only non-zero strings. */
+ tab[i].name = savenstr (env, p - env);
+ tab[i].len = strlen (tab[i].name);
+ i++;
+ }
+ if (*p)
+ env = p + 1;
+ else
+ {
+ tab[i].name = NULL; /* Mark end of table. */
+ tab[i].len = 0;
+ break;
+ }
+ }
+ return tab;
+}
+
+/* If the text at CP matches one of the tag-defining TeX command names,
+ return the pointer to the first occurrence of that command in TEX_toktab.
+ Otherwise return -1.
+ Keep the capital `T' in `token' for dumb truncating compilers
+ (this distinguishes it from `TEX_toktab' */
+int
+TEX_Token (cp)
+ char *cp;
+{
+ int i;
+
+ for (i = 0; TEX_toktab[i].len > 0; i++)
+ if (strneq (TEX_toktab[i].name, cp, TEX_toktab[i].len))
+ return i;
+ return -1;
+}
+\f
+/*
+ * Prolog support (rewritten) by Anders Lindgren, Mar. 96
+ *
+ * Assumes that the predicate starts at column 0.
+ * Only the first clause of a predicate is added.
+ */
+int prolog_pred PP ((char *s, char *last));
+void prolog_skip_comment PP ((linebuffer *plb, FILE *inf));
+int prolog_atom PP ((char *s, int pos));
+
+void
+Prolog_functions (inf)
+ FILE *inf;
+{
+ char *cp, *last;
+ int len;
+ int allocated;
+
+ allocated = 0;
+ len = 0;
+ last = NULL;
+
+ LOOP_ON_INPUT_LINES (inf, lb, cp)
+ {
+ if (cp[0] == '\0') /* Empty line */
+ continue;
+ else if (isspace (cp[0])) /* Not a predicate */
+ continue;
+ else if (cp[0] == '/' && cp[1] == '*') /* comment. */
+ prolog_skip_comment (&lb, inf);
+ else if ((len = prolog_pred (cp, last)) > 0)
+ {
+ /* Predicate. Store the function name so that we only
+ generate a tag for the first clause. */
+ if (last == NULL)
+ last = xnew(len + 1, char);
+ else if (len + 1 > allocated)
+ last = xrnew (last, len + 1, char);
+ allocated = len + 1;
+ strncpy (last, cp, len);
+ last[len] = '\0';
+ }
+ }
+}
+
+
+void
+prolog_skip_comment (plb, inf)
+ linebuffer *plb;
+ FILE *inf;
+{
+ char *cp;
+
+ do
+ {
+ for (cp = plb->buffer; *cp != '\0'; cp++)
+ if (cp[0] == '*' && cp[1] == '/')
+ return;
+ lineno++;
+ linecharno += readline (plb, inf);
+ }
+ while (!feof(inf));
+}
+
+/*
+ * A predicate definition is added if it matches:
+ * <beginning of line><Prolog Atom><whitespace>(
+ *
+ * It is added to the tags database if it doesn't match the
+ * name of the previous clause header.
+ *
+ * Return the size of the name of the predicate, or 0 if no header
+ * was found.
+ */
+int
+prolog_pred (s, last)
+ char *s;
+ char *last; /* Name of last clause. */
+{
+ int pos;
+ int len;
+
+ pos = prolog_atom (s, 0);
+ if (pos < 1)
+ return 0;
+
+ len = pos;
+ pos = skip_spaces (s + pos) - s;
+
+ if ((s[pos] == '(') || (s[pos] == '.'))
+ {
+ if (s[pos] == '(')
+ pos++;
+
+ /* Save only the first clause. */
+ if (last == NULL
+ || len != strlen (last)
+ || !strneq (s, last, len))
+ {
+ pfnote ((CTAGS) ? savenstr (s, len) : NULL, TRUE,
+ s, pos, lineno, linecharno);
+ return len;
+ }
+ }
+ return 0;
+}
+
+/*
+ * Consume a Prolog atom.
+ * Return the number of bytes consumed, or -1 if there was an error.
+ *
+ * A prolog atom, in this context, could be one of:
+ * - An alphanumeric sequence, starting with a lower case letter.
+ * - A quoted arbitrary string. Single quotes can escape themselves.
+ * Backslash quotes everything.
+ */
+int
+prolog_atom (s, pos)
+ char *s;
+ int pos;
+{
+ int origpos;
+
+ origpos = pos;
+
+ if (islower(s[pos]) || (s[pos] == '_'))
+ {
+ /* The atom is unquoted. */
+ pos++;
+ while (isalnum(s[pos]) || (s[pos] == '_'))
+ {
+ pos++;
+ }
+ return pos - origpos;
+ }
+ else if (s[pos] == '\'')
+ {
+ pos++;
+
+ while (1)
+ {
+ if (s[pos] == '\'')
+ {
+ pos++;
+ if (s[pos] != '\'')
+ break;
+ pos++; /* A double quote */
+ }
+ else if (s[pos] == '\0')
+ /* Multiline quoted atoms are ignored. */
+ return -1;
+ else if (s[pos] == '\\')
+ {
+ if (s[pos+1] == '\0')
+ return -1;
+ pos += 2;
+ }
+ else
+ pos++;
+ }
+ return pos - origpos;
+ }
+ else
+ return -1;
+}
+\f
+/*
+ * Support for Erlang -- Anders Lindgren, Feb 1996.
+ *
+ * Generates tags for functions, defines, and records.
+ *
+ * Assumes that Erlang functions start at column 0.
+ */
+int erlang_func PP ((char *s, char *last));
+void erlang_attribute PP ((char *s));
+int erlang_atom PP ((char *s, int pos));
+
+void
+Erlang_functions (inf)
+ FILE *inf;
+{
+ char *cp, *last;
+ int len;
+ int allocated;
+
+ allocated = 0;
+ len = 0;
+ last = NULL;
+
+ LOOP_ON_INPUT_LINES (inf, lb, cp)
+ {
+ if (cp[0] == '\0') /* Empty line */
+ continue;
+ else if (isspace (cp[0])) /* Not function nor attribute */
+ continue;
+ else if (cp[0] == '%') /* comment */
+ continue;
+ else if (cp[0] == '"') /* Sometimes, strings start in column one */
+ continue;
+ else if (cp[0] == '-') /* attribute, e.g. "-define" */
+ {
+ erlang_attribute (cp);
+ last = NULL;
+ }
+ else if ((len = erlang_func (cp, last)) > 0)
+ {
+ /*
+ * Function. Store the function name so that we only
+ * generates a tag for the first clause.
+ */
+ if (last == NULL)
+ last = xnew (len + 1, char);
+ else if (len + 1 > allocated)
+ last = xrnew (last, len + 1, char);
+ allocated = len + 1;
+ strncpy (last, cp, len);
+ last[len] = '\0';
+ }
+ }
+}
+
+
+/*
+ * A function definition is added if it matches:
+ * <beginning of line><Erlang Atom><whitespace>(
+ *
+ * It is added to the tags database if it doesn't match the
+ * name of the previous clause header.
+ *
+ * Return the size of the name of the function, or 0 if no function
+ * was found.
+ */
+int
+erlang_func (s, last)
+ char *s;
+ char *last; /* Name of last clause. */
+{
+ int pos;
+ int len;
+
+ pos = erlang_atom (s, 0);
+ if (pos < 1)
+ return 0;
+
+ len = pos;
+ pos = skip_spaces (s + pos) - s;
+
+ /* Save only the first clause. */
+ if (s[pos++] == '('
+ && (last == NULL
+ || len != strlen (last)
+ || !strneq (s, last, len)))
+ {
+ pfnote ((CTAGS) ? savenstr (s, len) : NULL, TRUE,
+ s, pos, lineno, linecharno);
+ return len;
+ }
+
+ return 0;
+}
+
+
+/*
+ * Handle attributes. Currently, tags are generated for defines
+ * and records.
+ *
+ * They are on the form:
+ * -define(foo, bar).
+ * -define(Foo(M, N), M+N).
+ * -record(graph, {vtab = notable, cyclic = true}).
+ */
+void
+erlang_attribute (s)
+ char *s;
+{
+ int pos;
+ int len;
+
+ if (strneq (s, "-define", 7) || strneq (s, "-record", 7))
+ {
+ pos = skip_spaces (s + 7) - s;
+ if (s[pos++] == '(')
+ {
+ pos = skip_spaces (s + pos) - s;
+ len = erlang_atom (s, pos);
+ if (len != 0)
+ pfnote ((CTAGS) ? savenstr (& s[pos], len) : NULL, TRUE,
+ s, pos + len, lineno, linecharno);
+ }
+ }
+ return;
+}
+
+
+/*
+ * Consume an Erlang atom (or variable).
+ * Return the number of bytes consumed, or -1 if there was an error.
+ */
+int
+erlang_atom (s, pos)
+ char *s;
+ int pos;
+{
+ int origpos;
+
+ origpos = pos;
+
+ if (isalpha (s[pos]) || s[pos] == '_')
+ {
+ /* The atom is unquoted. */
+ pos++;
+ while (isalnum (s[pos]) || s[pos] == '_')
+ pos++;
+ return pos - origpos;
+ }
+ else if (s[pos] == '\'')
+ {
+ pos++;
+
+ while (1)
+ {
+ if (s[pos] == '\'')
+ {
+ pos++;
+ break;
+ }
+ else if (s[pos] == '\0')
+ /* Multiline quoted atoms are ignored. */
+ return -1;
+ else if (s[pos] == '\\')
+ {
+ if (s[pos+1] == '\0')
+ return -1;
+ pos += 2;
+ }
+ else
+ pos++;
+ }
+ return pos - origpos;
+ }
+ else
+ return -1;
+}
+\f
+#ifdef ETAGS_REGEXPS
+
+/* Take a string like "/blah/" and turn it into "blah", making sure
+ that the first and last characters are the same, and handling
+ quoted separator characters. Actually, stops on the occurrence of
+ an unquoted separator. Also turns "\t" into a Tab character.
+ Returns pointer to terminating separator. Works in place. Null
+ terminates name string. */
+char * scan_separators PP ((char *name));
+char *
+scan_separators (name)
+ char *name;
+{
+ char sep = name[0];
+ char *copyto = name;
+ bool quoted = FALSE;
+
+ for (++name; *name != '\0'; ++name)
+ {
+ if (quoted)
+ {
+ if (*name == 't')
+ *copyto++ = '\t';
+ else if (*name == sep)
+ *copyto++ = sep;
+ else
+ {
+ /* Something else is quoted, so preserve the quote. */
+ *copyto++ = '\\';
+ *copyto++ = *name;
+ }
+ quoted = FALSE;
+ }
+ else if (*name == '\\')
+ quoted = TRUE;
+ else if (*name == sep)
+ break;
+ else
+ *copyto++ = *name;
+ }
+
+ /* Terminate copied string. */
+ *copyto = '\0';
+ return name;
+}
+
+/* Look at the argument of --regex or --no-regex and do the right
+ thing. Same for each line of a regexp file. */
+void
+analyse_regex (regex_arg)
+ char *regex_arg;
+{
+ if (regex_arg == NULL)
+ free_patterns (); /* --no-regex: remove existing regexps */
+
+ /* A real --regexp option or a line in a regexp file. */
+ switch (regex_arg[0])
+ {
+ /* Comments in regexp file or null arg to --regex. */
+ case '\0':
+ case ' ':
+ case '\t':
+ break;
+
+ /* Read a regex file. This is recursive and may result in a
+ loop, which will stop when the file descriptors are exhausted. */
+ case '@':
+ {
+ FILE *regexfp;
+ linebuffer regexbuf;
+ char *regexfile = regex_arg + 1;
+
+ /* regexfile is a file containing regexps, one per line. */
+ regexfp = fopen (regexfile, "r");
+ if (regexfp == NULL)
+ {
+ pfatal (regexfile);
+ return;
+ }
+ initbuffer (®exbuf);
+ while (readline_internal (®exbuf, regexfp) > 0)
+ analyse_regex (regexbuf.buffer);
+ free (regexbuf.buffer);
+ fclose (regexfp);
+ }
+ break;
+
+ /* Regexp to be used for a specific language only. */
+ case '{':
+ {
+ language *lang;
+ char *lang_name = regex_arg + 1;
+ char *cp;
+
+ for (cp = lang_name; *cp != '}'; cp++)
+ if (*cp == '\0')
+ {
+ error ("unterminated language name in regex: %s", regex_arg);
+ return;
+ }
+ *cp = '\0';
+ lang = get_language_from_name (lang_name);
+ if (lang == NULL)
+ return;
+ add_regex (cp + 1, lang);
+ }
+ break;
+
+ /* Regexp to be used for any language. */
+ default:
+ add_regex (regex_arg, NULL);
+ break;
+ }
+}
+
+/* Turn a name, which is an ed-style (but Emacs syntax) regular
+ expression, into a real regular expression by compiling it. */
+void
+add_regex (regexp_pattern, lang)
+ char *regexp_pattern;
+ language *lang;
+{
+ char *name;
+ const char *err;
+ struct re_pattern_buffer *patbuf;
+ pattern *pp;
+
+
+ if (regexp_pattern[strlen(regexp_pattern)-1] != regexp_pattern[0])
+ {
+ error ("%s: unterminated regexp", regexp_pattern);
+ return;
+ }
+ name = scan_separators (regexp_pattern);
+ if (regexp_pattern[0] == '\0')
+ {
+ error ("null regexp", (char *)NULL);
+ return;
+ }
+ (void) scan_separators (name);
+
+ patbuf = xnew (1, struct re_pattern_buffer);
+ patbuf->translate = NULL;
+ patbuf->fastmap = NULL;
+ patbuf->buffer = NULL;
+ patbuf->allocated = 0;
+
+ err = re_compile_pattern (regexp_pattern, strlen (regexp_pattern), patbuf);
+ if (err != NULL)
+ {
+ error ("%s while compiling pattern", err);
+ return;
+ }
+
+ pp = p_head;
+ p_head = xnew (1, pattern);
+ p_head->regex = savestr (regexp_pattern);
+ p_head->p_next = pp;
+ p_head->language = lang;
+ p_head->pattern = patbuf;
+ p_head->name_pattern = savestr (name);
+ p_head->error_signaled = FALSE;
+}
+
+/*
+ * Do the substitutions indicated by the regular expression and
+ * arguments.
+ */
+char * substitute PP ((char *in, char *out, struct re_registers *regs));
+char *
+substitute (in, out, regs)
+ char *in, *out;
+ struct re_registers *regs;
+{
+ char *result, *t;
+ int size, dig, diglen;
+
+ result = NULL;
+ size = strlen (out);
+
+ /* Pass 1: figure out how much to allocate by finding all \N strings. */
+ if (out[size - 1] == '\\')
+ fatal ("pattern error in \"%s\"", out);
+ for (t = etags_strchr (out, '\\');
+ t != NULL;
+ t = etags_strchr (t + 2, '\\'))
+ if (isdigit (t[1]))
+ {
+ dig = t[1] - '0';
+ diglen = regs->end[dig] - regs->start[dig];
+ size += diglen - 2;
+ }
+ else
+ size -= 1;
+
+ /* Allocate space and do the substitutions. */
+ result = xnew (size + 1, char);
+
+ for (t = result; *out != '\0'; out++)
+ if (*out == '\\' && isdigit (*++out))
+ {
+ /* Using "dig2" satisfies my debugger. Bleah. */
+ dig = *out - '0';
+ diglen = regs->end[dig] - regs->start[dig];
+ strncpy (t, in + regs->start[dig], diglen);
+ t += diglen;
+ }
+ else
+ *t++ = *out;
+ *t = '\0';
+
+ if (DEBUG && (t > result + size || t - result != strlen (result)))
+ abort ();
+
+ return result;
+}
+
+/* Deallocate all patterns. */
+void
+free_patterns ()
+{
+ pattern *pp;
+ while (p_head != NULL)
+ {
+ pp = p_head->p_next;
+ free (p_head->regex);
+ free (p_head->name_pattern);
+ free (p_head);
+ p_head = pp;
+ }
+ return;
+}
+\f
+#endif /* ETAGS_REGEXPS */
+/* Initialize a linebuffer for use */
+void
+initbuffer (lbp)
+ linebuffer *lbp;
+{
+ lbp->size = 200;
+ lbp->buffer = xnew (200, char);
+}
+
+/*
+ * Read a line of text from `stream' into `lbp', excluding the
+ * newline or CR-NL, if any. Return the number of characters read from
+ * `stream', which is the length of the line including the newline.
+ *
+ * On DOS or Windows we do not count the CR character, if any, before the
+ * NL, in the returned length; this mirrors the behavior of emacs on those
+ * platforms (for text files, it translates CR-NL to NL as it reads in the
+ * file).
+ */
+long
+readline_internal (lbp, stream)
+ linebuffer *lbp;
+ register FILE *stream;
+{
+ char *buffer = lbp->buffer;
+ register char *p = lbp->buffer;
+ register char *pend;
+ int chars_deleted;
+
+ pend = p + lbp->size; /* Separate to avoid 386/IX compiler bug. */
+
+ while (1)
+ {
+ register int c = getc (stream);
+ if (p == pend)
+ {
+ /* We're at the end of linebuffer: expand it. */
+ lbp->size *= 2;
+ buffer = xrnew (buffer, lbp->size, char);
+ p += buffer - lbp->buffer;
+ pend = buffer + lbp->size;
+ lbp->buffer = buffer;
+ }
+ if (c == EOF)
+ {
+ *p = '\0';
+ chars_deleted = 0;
+ break;
+ }
+ if (c == '\n')
+ {
+ if (p > buffer && p[-1] == '\r')
+ {
+ p -= 1;
+#ifdef DOS_NT
+ /* Assume CRLF->LF translation will be performed by Emacs
+ when loading this file, so CRs won't appear in the buffer.
+ It would be cleaner to compensate within Emacs;
+ however, Emacs does not know how many CRs were deleted
+ before any given point in the file. */
+ chars_deleted = 1;
+#else
+ chars_deleted = 2;
+#endif
+ }
+ else
+ {
+ chars_deleted = 1;
+ }
+ *p = '\0';
+ break;
+ }
+ *p++ = c;
+ }
+ lbp->len = p - buffer;
+
+ return lbp->len + chars_deleted;
+}
+
+/*
+ * Like readline_internal, above, but in addition try to match the
+ * input line against relevant regular expressions.
+ */
+long
+readline (lbp, stream)
+ linebuffer *lbp;
+ FILE *stream;
+{
+ /* Read new line. */
+ long result = readline_internal (lbp, stream);
+#ifdef ETAGS_REGEXPS
+ int match;
+ pattern *pp;
+
+ /* Match against relevant patterns. */
+ if (lbp->len > 0)
+ for (pp = p_head; pp != NULL; pp = pp->p_next)
+ {
+ /* Only use generic regexps or those for the current language. */
+ if (pp->language != NULL && pp->language != curlang)
+ continue;
+
+ match = re_match (pp->pattern, lbp->buffer, lbp->len, 0, &pp->regs);
+ switch (match)
+ {
+ case -2:
+ /* Some error. */
+ if (!pp->error_signaled)
+ {
+ error ("error while matching \"%s\"", pp->regex);
+ pp->error_signaled = TRUE;
+ }
+ break;
+ case -1:
+ /* No match. */
+ break;
+ default:
+ /* Match occurred. Construct a tag. */
+ if (pp->name_pattern[0] != '\0')
+ {
+ /* Make a named tag. */
+ char *name = substitute (lbp->buffer,
+ pp->name_pattern, &pp->regs);
+ if (name != NULL)
+ pfnote (name, TRUE, lbp->buffer, match, lineno, linecharno);
+ }
+ else
+ {
+ /* Make an unnamed tag. */
+ pfnote ((char *)NULL, TRUE,
+ lbp->buffer, match, lineno, linecharno);
+ }
+ break;
+ }
+ }
+#endif /* ETAGS_REGEXPS */
+
+ return result;
+}
+\f
+/*
+ * Return a pointer to a space of size strlen(cp)+1 allocated
+ * with xnew where the string CP has been copied.
+ */
+char *
+savestr (cp)
+ char *cp;
+{
+ return savenstr (cp, strlen (cp));
+}
+
+/*
+ * Return a pointer to a space of size LEN+1 allocated with xnew where
+ * the string CP has been copied for at most the first LEN characters.
+ */
+char *
+savenstr (cp, len)
+ char *cp;
+ int len;
+{
+ register char *dp;
+
+ dp = xnew (len + 1, char);
+ strncpy (dp, cp, len);
+ dp[len] = '\0';
+ return dp;
+}
+
+/*
+ * Return the ptr in sp at which the character c last
+ * appears; NULL if not found
+ *
+ * Identical to System V strrchr, included for portability.
+ */
+char *
+etags_strrchr (sp, c)
+ register char *sp;
+ register int c;
+{
+ register char *r;
+
+ r = NULL;
+ do
+ {
+ if (*sp == c)
+ r = sp;
+ } while (*sp++);
+ return r;
+}
+
+
+/*
+ * Return the ptr in sp at which the character c first
+ * appears; NULL if not found
+ *
+ * Identical to System V strchr, included for portability.
+ */
+char *
+etags_strchr (sp, c)
+ register char *sp;
+ register int c;
+{
+ do
+ {
+ if (*sp == c)
+ return sp;
+ } while (*sp++);
+ return NULL;
+}
+
+/* Skip spaces, return new pointer. */
+char *
+skip_spaces (cp)
+ char *cp;
+{
+ while (isspace (*cp)) /* isspace('\0')==FALSE */
+ cp++;
+ return cp;
+}
+
+/* Skip non spaces, return new pointer. */
+char *
+skip_non_spaces (cp)
+ char *cp;
+{
+ while (!iswhite (*cp)) /* iswhite('\0')==TRUE */
+ cp++;
+ return cp;
+}
+
+/* Print error message and exit. */
+void
+fatal (s1, s2)
+ char *s1, *s2;
+{
+ error (s1, s2);
+ exit (BAD);
+}
+
+void
+pfatal (s1)
+ char *s1;
+{
+ perror (s1);
+ exit (BAD);
+}
+
+void
+suggest_asking_for_help ()
+{
+ fprintf (stderr, "\tTry `%s %s' for a complete list of options.\n",
+ progname,
+#ifdef LONG_OPTIONS
+ "--help"
+#else
+ "-h"
+#endif
+ );
+ exit (BAD);
+}
+
+/* Print error message. `s1' is printf control string, `s2' is arg for it. */
+void
+error (s1, s2)
+ const char *s1, *s2;
+{
+ fprintf (stderr, "%s: ", progname);
+ fprintf (stderr, s1, s2);
+ fprintf (stderr, "\n");
+}
+
+/* Return a newly-allocated string whose contents
+ concatenate those of s1, s2, s3. */
+char *
+concat (s1, s2, s3)
+ char *s1, *s2, *s3;
+{
+ int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3);
+ char *result = xnew (len1 + len2 + len3 + 1, char);
+
+ strcpy (result, s1);
+ strcpy (result + len1, s2);
+ strcpy (result + len1 + len2, s3);
+ result[len1 + len2 + len3] = '\0';
+
+ return result;
+}
+\f
+/* Does the same work as the system V getcwd, but does not need to
+ guess the buffer size in advance. */
+char *
+etags_getcwd ()
+{
+#ifdef HAVE_GETCWD
+ int bufsize = 200;
+ char *path = xnew (bufsize, char);
+
+ while (getcwd (path, bufsize) == NULL)
+ {
+ if (errno != ERANGE)
+ pfatal ("getcwd");
+ bufsize *= 2;
+ free (path);
+ path = xnew (bufsize, char);
+ }
+
+ canonicalize_filename (path);
+ return path;
+
+#else /* not HAVE_GETCWD */
+#ifdef MSDOS
+ char *p, path[MAXPATHLEN + 1]; /* Fixed size is safe on MSDOS. */
+
+ getwd (path);
+
+ for (p = path; *p != '\0'; p++)
+ if (*p == '\\')
+ *p = '/';
+ else
+ *p = lowcase (*p);
+
+ return strdup (path);
+#else /* not MSDOS */
+ linebuffer path;
+ FILE *pipe;
+
+ initbuffer (&path);
+ pipe = (FILE *) popen ("pwd 2>/dev/null", "r");
+ if (pipe == NULL || readline_internal (&path, pipe) == 0)
+ pfatal ("pwd");
+ pclose (pipe);
+
+ return path.buffer;
+#endif /* not MSDOS */
+#endif /* not HAVE_GETCWD */
+}
+
+/* Return a newly allocated string containing the file name of FILE
+ relative to the absolute directory DIR (which should end with a slash). */
+char *
+relative_filename (file, dir)
+ char *file, *dir;
+{
+ char *fp, *dp, *afn, *res;
+ int i;
+
+ /* Find the common root of file and dir (with a trailing slash). */
+ afn = absolute_filename (file, cwd);
+ fp = afn;
+ dp = dir;
+ while (*fp++ == *dp++)
+ continue;
+ fp--, dp--; /* back to the first differing char */
+ do /* look at the equal chars until '/' */
+ fp--, dp--;
+ while (*fp != '/');
+
+ /* Build a sequence of "../" strings for the resulting relative file name. */
+ i = 0;
+ while ((dp = etags_strchr (dp + 1, '/')) != NULL)
+ i += 1;
+ res = xnew (3*i + strlen (fp + 1) + 1, char);
+ res[0] = '\0';
+ while (i-- > 0)
+ strcat (res, "../");
+
+ /* Add the file name relative to the common root of file and dir. */
+ strcat (res, fp + 1);
+ free (afn);
+
+ return res;
+}
+
+/* Return a newly allocated string containing the absolute file name
+ of FILE given DIR (which should end with a slash). */
+char *
+absolute_filename (file, dir)
+ char *file, *dir;
+{
+ char *slashp, *cp, *res;
+
+ if (filename_is_absolute (file))
+ res = savestr (file);
+#ifdef DOS_NT
+ /* We don't support non-absolute file names with a drive
+ letter, like `d:NAME' (it's too much hassle). */
+ else if (file[1] == ':')
+ fatal ("%s: relative file names with drive letters not supported", file);
+#endif
+ else
+ res = concat (dir, file, "");
+
+ /* Delete the "/dirname/.." and "/." substrings. */
+ slashp = etags_strchr (res, '/');
+ while (slashp != NULL && slashp[0] != '\0')
+ {
+ if (slashp[1] == '.')
+ {
+ if (slashp[2] == '.'
+ && (slashp[3] == '/' || slashp[3] == '\0'))
+ {
+ cp = slashp;
+ do
+ cp--;
+ while (cp >= res && !filename_is_absolute (cp));
+ if (cp < res)
+ cp = slashp; /* the absolute name begins with "/.." */
+#ifdef DOS_NT
+ /* Under MSDOS and NT we get `d:/NAME' as absolute
+ file name, so the luser could say `d:/../NAME'.
+ We silently treat this as `d:/NAME'. */
+ else if (cp[0] != '/')
+ cp = slashp;
+#endif
+ strcpy (cp, slashp + 3);
+ slashp = cp;
+ continue;
+ }
+ else if (slashp[2] == '/' || slashp[2] == '\0')
+ {
+ strcpy (slashp, slashp + 2);
+ continue;
+ }
+ }
+
+ slashp = etags_strchr (slashp + 1, '/');
+ }
+
+ if (res[0] == '\0')
+ return savestr ("/");
+ else
+ return res;
+}
+
+/* Return a newly allocated string containing the absolute
+ file name of dir where FILE resides given DIR (which should
+ end with a slash). */
+char *
+absolute_dirname (file, dir)
+ char *file, *dir;
+{
+ char *slashp, *res;
+ char save;
+
+ canonicalize_filename (file);
+ slashp = etags_strrchr (file, '/');
+ if (slashp == NULL)
+ return savestr (dir);
+ save = slashp[1];
+ slashp[1] = '\0';
+ res = absolute_filename (file, dir);
+ slashp[1] = save;
+
+ return res;
+}
+
+/* Whether the argument string is an absolute file name. The argument
+ string must have been canonicalized with canonicalize_filename. */
+bool
+filename_is_absolute (fn)
+ char *fn;
+{
+ return (fn[0] == '/'
+#ifdef DOS_NT
+ || (isalpha(fn[0]) && fn[1] == ':' && fn[2] == '/')
+#endif
+ );
+}
+
+/* Translate backslashes into slashes. Works in place. */
+void
+canonicalize_filename (fn)
+ register char *fn;
+{
+#ifdef DOS_NT
+ for (; *fn != '\0'; fn++)
+ if (*fn == '\\')
+ *fn = '/';
+#else
+ /* No action. */
+#endif
+}
+
+/* Increase the size of a linebuffer. */
+void
+grow_linebuffer (lbp, toksize)
+ linebuffer *lbp;
+ int toksize;
+{
+ while (lbp->size < toksize)
+ lbp->size *= 2;
+ lbp->buffer = xrnew (lbp->buffer, lbp->size, char);
+}
+
+/* Like malloc but get fatal error if memory is exhausted. */
+long *
+xmalloc (size)
+ unsigned int size;
+{
+ long *result = (long *) malloc (size);
+ if (result == NULL)
+ fatal ("virtual memory exhausted", (char *)NULL);
+ return result;
+}
+
+long *
+xrealloc (ptr, size)
+ char *ptr;
+ unsigned int size;
+{
+ long *result = (long *) realloc (ptr, size);
+ if (result == NULL)
+ fatal ("virtual memory exhausted", (char *)NULL);
+ return result;
+}
projects / chise / xemacs-chise.git.1 / blobdiff