--- /dev/null
+/* Work-alike for termcap, plus extra features.
+ Copyright (C) 1985, 1986, 1993 Free Software Foundation, Inc.
+
+This file is part of XEmacs.
+
+XEmacs 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, or (at your option) any
+later version.
+
+XEmacs 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 XEmacs; see the file COPYING. If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+/* Synched up with: Not synched with FSF. */
+
+/* config.h may rename various library functions such as malloc. */
+#ifdef emacs
+#include <config.h>
+#include "lisp.h" /* For encapsulated open, close, read */
+#include "device.h" /* For DEVICE_BAUD_RATE */
+#else /* not emacs */
+#if defined(USG) || defined(STDC_HEADERS)
+#define memcpy(d, s, n) memcpy ((d), (s), (n))
+#endif
+
+#ifdef STDC_HEADERS
+#include <stdlib.h>
+#include <string.h>
+#else
+char *getenv ();
+char *malloc ();
+char *realloc ();
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef _POSIX_VERSION
+#include <fcntl.h>
+#endif
+
+#endif /* not emacs */
+
+/* BUFSIZE is the initial size allocated for the buffer
+ for reading the termcap file.
+ It is not a limit.
+ Make it large normally for speed.
+ Make it variable when debugging, so can exercise
+ increasing the space dynamically. */
+
+#ifndef BUFSIZE
+#ifdef DEBUG
+#define BUFSIZE bufsize
+
+int bufsize = 128;
+#else
+#define BUFSIZE 2048
+#endif
+#endif
+
+#ifndef emacs
+static void
+memory_out ()
+{
+ write (2, "virtual memory exhausted\n", 25);
+ exit (1);
+}
+
+static char *
+xmalloc (size)
+ unsigned int size;
+{
+ char *tem = malloc (size);
+
+ if (!tem)
+ memory_out ();
+ return tem;
+}
+
+static char *
+xrealloc (ptr, size)
+ char *ptr;
+ unsigned size;
+{
+ char *tem = realloc (ptr, size);
+
+ if (!tem)
+ memory_out ();
+ return tem;
+}
+#endif /* not emacs */
+\f
+/* Looking up capabilities in the entry already found. */
+
+/* The pointer to the data made by tgetent is left here
+ for tgetnum, tgetflag and tgetstr to find. */
+static char *term_entry;
+
+static CONST char *tgetst1 (CONST char *ptr, char **area);
+
+/* Search entry BP for capability CAP.
+ Return a pointer to the capability (in BP) if found,
+ 0 if not found. */
+
+static CONST char *
+find_capability (bp, cap)
+ CONST char *bp;
+ CONST char *cap;
+{
+ for (; *bp; bp++)
+ if (bp[0] == ':'
+ && bp[1] == cap[0]
+ && bp[2] == cap[1])
+ return &bp[4];
+ return 0;
+}
+
+int
+tgetnum (cap)
+ CONST char *cap;
+{
+ CONST char *ptr = find_capability (term_entry, cap);
+ if (!ptr || ptr[-1] != '#')
+ return -1;
+ return atoi (ptr);
+}
+
+int
+tgetflag (cap)
+ CONST char *cap;
+{
+ CONST char *ptr = find_capability (term_entry, cap);
+ return 0 != ptr && ptr[-1] == ':';
+}
+
+/* Look up a string-valued capability CAP.
+ If AREA is nonzero, it points to a pointer to a block in which
+ to store the string. That pointer is advanced over the space used.
+ If AREA is zero, space is allocated with `malloc'. */
+
+CONST char *
+tgetstr (cap, area)
+ CONST char *cap;
+ char **area;
+{
+ CONST char *ptr = find_capability (term_entry, cap);
+ if (!ptr || (ptr[-1] != '=' && ptr[-1] != '~'))
+ return 0;
+ return tgetst1 (ptr, area);
+}
+
+/* Table, indexed by a character in range 0100 to 0140 with 0100 subtracted,
+ gives meaning of character following \, or a space if no special meaning.
+ Eight characters per line within the string. */
+
+static char esctab[]
+ = " \007\010 \033\014 "
+" \012 "
+" \015 \011 \013 "
+" ";
+
+/* PTR points to a string value inside a termcap entry.
+ Copy that value, processing \ and ^ abbreviations,
+ into the block that *AREA points to,
+ or to newly allocated storage if AREA is 0. */
+
+static CONST char *
+tgetst1 (ptr, area)
+ CONST char *ptr;
+ char **area;
+{
+ CONST char *p;
+ char *r;
+ int c;
+ int size;
+ char *ret;
+ int c1;
+
+ if (!ptr)
+ return 0;
+
+ /* `ret' gets address of where to store the string. */
+ if (!area)
+ {
+ /* Compute size of block needed (may overestimate). */
+ p = ptr;
+ while ((c = *p++) && c != ':' && c != '\n')
+ ;
+ ret = (char *) xmalloc (p - ptr + 1);
+ }
+ else
+ ret = *area;
+
+ /* Copy the string value, stopping at null or colon.
+ Also process ^ and \ abbreviations. */
+ p = ptr;
+ r = ret;
+ while ((c = *p++) && c != ':' && c != '\n')
+ {
+ if (c == '^')
+ c = *p++ & 037;
+ else if (c == '\\')
+ {
+ c = *p++;
+ if (c >= '0' && c <= '7')
+ {
+ c -= '0';
+ size = 0;
+
+ while (++size < 3 && (c1 = *p) >= '0' && c1 <= '7')
+ {
+ c *= 8;
+ c += c1 - '0';
+ p++;
+ }
+ }
+ else if (c >= 0100 && c < 0200)
+ {
+ c1 = esctab[(c & ~040) - 0100];
+ if (c1 != ' ')
+ c = c1;
+ }
+ }
+ *r++ = c;
+ }
+ *r = 0;
+ /* Update *AREA. */
+ if (area)
+ *area = r + 1;
+ return ret;
+}
+\f
+/* Outputting a string with padding. */
+
+#ifdef LINUX
+speed_t ospeed;
+#else
+short ospeed;
+#endif
+/* If `ospeed' is 0, we use `tputs_baud_rate' as the actual baud rate. */
+int tputs_baud_rate;
+char PC;
+
+/* Actual baud rate if positive;
+ - baud rate / 100 if negative. */
+
+static short speeds[] =
+ {
+ 0, 50, 75, 110, 135, 150, -2, -3, -6, -12,
+ -18, -24, -48, -96, -192, -288, -384, -576, -1152
+ };
+
+void
+tputs (string, nlines, outfun)
+ CONST char *string;
+ int nlines;
+ void (*outfun) (int);
+{
+ int padcount = 0;
+ int speed;
+
+#ifdef emacs
+ speed = DEVICE_BAUD_RATE (XDEVICE (Fselected_device (Qnil)));
+#else
+ if (ospeed == 0)
+ speed = tputs_baud_rate;
+ else
+ speed = speeds[ospeed];
+#endif
+
+ if (string == (char *) 0)
+ return;
+
+ while (isdigit (* (CONST unsigned char *) string))
+ {
+ padcount += *string++ - '0';
+ padcount *= 10;
+ }
+ if (*string == '.')
+ {
+ string++;
+ padcount += *string++ - '0';
+ }
+ if (*string == '*')
+ {
+ string++;
+ padcount *= nlines;
+ }
+ while (*string)
+ (*outfun) (*string++);
+
+ /* padcount is now in units of tenths of msec. */
+ padcount *= speeds[ospeed];
+ padcount += 500;
+ padcount /= 1000;
+ if (speeds[ospeed] < 0)
+ padcount = -padcount;
+ else
+ {
+ padcount += 50;
+ padcount /= 100;
+ }
+
+ while (padcount-- > 0)
+ (*outfun) (PC);
+}
+\f
+/* Finding the termcap entry in the termcap data base. */
+
+struct buffer
+ {
+ char *beg;
+ int size;
+ char *ptr;
+ int ateof;
+ int full;
+ };
+
+/* Forward declarations of static functions. */
+
+static int scan_file ();
+static char *gobble_line ();
+static int compare_contin ();
+static int name_match ();
+
+
+/* Find the termcap entry data for terminal type NAME
+ and store it in the block that BP points to.
+ Record its address for future use.
+
+ If BP is zero, space is dynamically allocated. */
+
+extern char *getenv ();
+
+int
+tgetent (bp, name)
+ char *bp;
+ CONST char *name;
+{
+ char *tem;
+ int fd;
+ struct buffer buf;
+ char *bp1;
+ char *bp2;
+ CONST char *term;
+ int malloc_size = 0;
+ int c;
+ char *tcenv; /* TERMCAP value, if it contais :tc=. */
+ CONST char *indirect = 0; /* Terminal type in :tc= in TERMCAP value. */
+
+ tem = getenv ("TERMCAP");
+ if (tem && *tem == 0) tem = 0;
+
+
+ /* If tem is non-null and starts with / (in the un*x case, that is),
+ it is a file name to use instead of /etc/termcap.
+ If it is non-null and does not start with /,
+ it is the entry itself, but only if
+ the name the caller requested matches the TERM variable. */
+
+ if (tem && !IS_DIRECTORY_SEP (*tem) && !strcmp (name, (char *) getenv ("TERM")))
+ {
+ indirect = tgetst1 (find_capability (tem, "tc"), 0);
+ if (!indirect)
+ {
+ if (!bp)
+ bp = tem;
+ else
+ strcpy (bp, tem);
+ goto ret;
+ }
+ else
+ { /* We will need to read /etc/termcap. */
+ tcenv = tem;
+ tem = 0;
+ }
+ }
+ else
+ indirect = (char *) 0;
+
+ if (!tem)
+ tem = "/etc/termcap";
+
+ /* Here we know we must search a file and tem has its name. */
+
+ fd = open (tem, 0, 0);
+ if (fd < 0)
+ return -1;
+
+ buf.size = BUFSIZE;
+ /* Add 1 to size to ensure room for terminating null. */
+ buf.beg = (char *) xmalloc (buf.size + 1);
+ term = indirect ? indirect : name;
+
+ if (!bp)
+ {
+ malloc_size = indirect ? strlen (tcenv) + 1 : buf.size;
+ bp = (char *) xmalloc (malloc_size);
+ }
+ bp1 = bp;
+
+ if (indirect)
+ /* Copy the data from the environment variable. */
+ {
+ strcpy (bp, tcenv);
+ bp1 += strlen (tcenv);
+ }
+
+ while (term)
+ {
+ /* Scan the file, reading it via buf, till find start of main entry. */
+ if (scan_file (term, fd, &buf) == 0)
+ return 0;
+
+ /* Free old `term' if appropriate. */
+ if (term != name)
+ xfree (term);
+
+ /* If BP is malloc'd by us, make sure it is big enough. */
+ if (malloc_size)
+ {
+ malloc_size = bp1 - bp + buf.size;
+ tem = (char *) xrealloc (bp, malloc_size);
+ bp1 += tem - bp;
+ bp = tem;
+ }
+
+ bp2 = bp1;
+
+ /* Copy the line of the entry from buf into bp. */
+ tem = buf.ptr;
+ while ((*bp1++ = c = *tem++) && c != '\n')
+ /* Drop out any \ newline sequence. */
+ if (c == '\\' && *tem == '\n')
+ {
+ bp1--;
+ tem++;
+ }
+ *bp1 = 0;
+
+ /* Does this entry refer to another terminal type's entry?
+ If something is found, copy it into heap and null-terminate it. */
+ term = tgetst1 (find_capability (bp2, "tc"), 0);
+ }
+
+ close (fd);
+ xfree (buf.beg);
+
+ if (malloc_size)
+ {
+ bp = (char *) xrealloc (bp, bp1 - bp + 1);
+ }
+
+ ret:
+ term_entry = bp;
+ if (malloc_size)
+ /* #### yuck, why the hell are we casting a pointer to an int? */
+ return (int) (long) bp;
+ return 1;
+}
+
+/* Given file open on FD and buffer BUFP,
+ scan the file from the beginning until a line is found
+ that starts the entry for terminal type STRING.
+ Returns 1 if successful, with that line in BUFP,
+ or returns 0 if no entry found in the file. */
+
+static int
+scan_file (string, fd, bufp)
+ char *string;
+ int fd;
+ struct buffer *bufp;
+{
+ char *end;
+
+ bufp->ptr = bufp->beg;
+ bufp->full = 0;
+ bufp->ateof = 0;
+ *bufp->ptr = 0;
+
+ lseek (fd, 0L, 0);
+
+ while (!bufp->ateof)
+ {
+ /* Read a line into the buffer. */
+ end = 0;
+ do
+ {
+ /* if it is continued, append another line to it,
+ until a non-continued line ends. */
+ end = gobble_line (fd, bufp, end);
+ }
+ while (!bufp->ateof && end[-2] == '\\');
+
+ if (*bufp->ptr != '#'
+ && name_match (bufp->ptr, string))
+ return 1;
+
+ /* Discard the line just processed. */
+ bufp->ptr = end;
+ }
+ return 0;
+}
+
+/* Return nonzero if NAME is one of the names specified
+ by termcap entry LINE. */
+
+static int
+name_match (line, name)
+ char *line, *name;
+{
+ char *tem;
+
+ if (!compare_contin (line, name))
+ return 1;
+ /* This line starts an entry. Is it the right one? */
+ for (tem = line; *tem && *tem != '\n' && *tem != ':'; tem++)
+ if (*tem == '|' && !compare_contin (tem + 1, name))
+ return 1;
+
+ return 0;
+}
+
+static int
+compare_contin (str1, str2)
+ char *str1, *str2;
+{
+ int c1, c2;
+ while (1)
+ {
+ c1 = *str1++;
+ c2 = *str2++;
+ while (c1 == '\\' && *str1 == '\n')
+ {
+ str1++;
+ while ((c1 = *str1++) == ' ' || c1 == '\t');
+ }
+ if (c2 == '\0')
+ {
+ /* End of type being looked up. */
+ if (c1 == '|' || c1 == ':')
+ /* If end of name in data base, we win. */
+ return 0;
+ else
+ return 1;
+ }
+ else if (c1 != c2)
+ return 1;
+ }
+}
+
+/* Make sure that the buffer <- BUFP contains a full line
+ of the file open on FD, starting at the place BUFP->ptr
+ points to. Can read more of the file, discard stuff before
+ BUFP->ptr, or make the buffer bigger.
+
+ Returns the pointer to after the newline ending the line,
+ or to the end of the file, if there is no newline to end it.
+
+ Can also merge on continuation lines. If APPEND_END is
+ nonzero, it points past the newline of a line that is
+ continued; we add another line onto it and regard the whole
+ thing as one line. The caller decides when a line is continued. */
+
+static char *
+gobble_line (fd, bufp, append_end)
+ int fd;
+ struct buffer *bufp;
+ char *append_end;
+{
+ char *end;
+ int nread;
+ char *buf = bufp->beg;
+ char *tem;
+
+ if (append_end == 0)
+ append_end = bufp->ptr;
+
+ while (1)
+ {
+ end = append_end;
+ while (*end && *end != '\n') end++;
+ if (*end)
+ break;
+ if (bufp->ateof)
+ return buf + bufp->full;
+ if (bufp->ptr == buf)
+ {
+ if (bufp->full == bufp->size)
+ {
+ bufp->size *= 2;
+ /* Add 1 to size to ensure room for terminating null. */
+ tem = (char *) xrealloc (buf, bufp->size + 1);
+ bufp->ptr = (bufp->ptr - buf) + tem;
+ append_end = (append_end - buf) + tem;
+ bufp->beg = buf = tem;
+ }
+ }
+ else
+ {
+ append_end -= bufp->ptr - buf;
+ memcpy (buf, bufp->ptr, bufp->full -= bufp->ptr - buf);
+ bufp->ptr = buf;
+ }
+ if (!(nread = read (fd, buf + bufp->full, bufp->size - bufp->full)))
+ bufp->ateof = 1;
+ bufp->full += nread;
+ buf[bufp->full] = 0;
+ }
+ return end + 1;
+}
+\f
+#ifdef TEST
+
+#include <stdio.h>
+
+main (argc, argv)
+ int argc;
+ char **argv;
+{
+ char *term;
+ char *buf;
+
+ term = argv[1];
+ printf ("TERM: %s\n", term);
+
+ buf = (char *) tgetent (0, term);
+ if ((int) buf <= 0)
+ {
+ printf ("No entry.\n");
+ return 0;
+ }
+
+ printf ("Entry: %s\n", buf);
+
+ tprint ("cm");
+ tprint ("AL");
+
+ printf ("co: %d\n", tgetnum ("co"));
+ printf ("am: %d\n", tgetflag ("am"));
+}
+
+tprint (cap)
+ CONST char *cap;
+{
+ char *x = tgetstr (cap, 0);
+ char *y;
+
+ printf ("%s: ", cap);
+ if (x)
+ {
+ for (y = x; *y; y++)
+ if (*y <= ' ' || *y == 0177)
+ printf ("\\%0o", *y);
+ else
+ putchar (*y);
+ xfree (x);
+ }
+ else
+ printf ("none");
+ putchar ('\n');
+}
+
+#endif /* TEST */
+
projects / chise / xemacs-chise.git.1 / blobdiff