#include "elhash.h"
#include "insdel.h"
#include "lstream.h"
+#include "opaque.h"
#ifdef MULE
#include "mule-ccl.h"
#include "chartab.h"
This describes a permutation of the possible coding categories. */
int coding_category_by_priority[CODING_CATEGORY_LAST + 1];
+#ifdef MULE
Lisp_Object ucs_to_mule_table[65536];
+#endif
} *fcd;
static const struct lrecord_description fcd_description_1[] = {
- { XD_LISP_OBJECT, offsetof(struct file_coding_dump, coding_category_system), CODING_CATEGORY_LAST + 1 },
- { XD_LISP_OBJECT, offsetof(struct file_coding_dump, ucs_to_mule_table), 65536 },
+ { XD_LISP_OBJECT_ARRAY, offsetof (struct file_coding_dump, coding_category_system), CODING_CATEGORY_LAST + 1 },
+#ifdef MULE
+ { XD_LISP_OBJECT_ARRAY, offsetof (struct file_coding_dump, ucs_to_mule_table), 65536 },
+#endif
{ XD_END }
};
static const struct struct_description fcd_description = {
- sizeof(struct file_coding_dump),
+ sizeof (struct file_coding_dump),
fcd_description_1
};
Lisp_Object Qforce_g2_on_output, Qforce_g3_on_output;
Lisp_Object Qno_iso6429;
Lisp_Object Qinput_charset_conversion, Qoutput_charset_conversion;
-Lisp_Object Qctext, Qescape_quoted;
+Lisp_Object Qescape_quoted;
Lisp_Object Qshort, Qno_ascii_eol, Qno_ascii_cntl, Qseven, Qlock_shift;
#endif
Lisp_Object Qencode, Qdecode;
} codesys_prop_dynarr;
static const struct lrecord_description codesys_prop_description_1[] = {
- { XD_LISP_OBJECT, offsetof(codesys_prop, sym), 1 },
+ { XD_LISP_OBJECT, offsetof (codesys_prop, sym) },
{ XD_END }
};
static const struct struct_description codesys_prop_description = {
- sizeof(codesys_prop),
+ sizeof (codesys_prop),
codesys_prop_description_1
};
static const struct lrecord_description codesys_prop_dynarr_description_1[] = {
- XD_DYNARR_DESC(codesys_prop_dynarr, &codesys_prop_description),
+ XD_DYNARR_DESC (codesys_prop_dynarr, &codesys_prop_description),
{ XD_END }
};
static const struct struct_description codesys_prop_dynarr_description = {
- sizeof(codesys_prop_dynarr),
+ sizeof (codesys_prop_dynarr),
codesys_prop_dynarr_description_1
};
#ifdef MULE
static const struct lrecord_description ccs_description_1[] = {
- { XD_LISP_OBJECT, offsetof(charset_conversion_spec, from_charset), 2 },
+ { XD_LISP_OBJECT, offsetof (charset_conversion_spec, from_charset) },
+ { XD_LISP_OBJECT, offsetof (charset_conversion_spec, to_charset) },
{ XD_END }
};
static const struct struct_description ccs_description = {
- sizeof(charset_conversion_spec),
+ sizeof (charset_conversion_spec),
ccs_description_1
};
static const struct lrecord_description ccsd_description_1[] = {
- XD_DYNARR_DESC(charset_conversion_spec_dynarr, &ccs_description),
+ XD_DYNARR_DESC (charset_conversion_spec_dynarr, &ccs_description),
{ XD_END }
};
static const struct struct_description ccsd_description = {
- sizeof(charset_conversion_spec_dynarr),
+ sizeof (charset_conversion_spec_dynarr),
ccsd_description_1
};
#endif
static const struct lrecord_description coding_system_description[] = {
- { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, name), 2 },
- { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, mnemonic), 3 },
- { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, eol_lf), 3 },
+ { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, name) },
+ { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, doc_string) },
+ { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, mnemonic) },
+ { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, post_read_conversion) },
+ { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, pre_write_conversion) },
+ { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol_lf) },
+ { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol_crlf) },
+ { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol_cr) },
#ifdef MULE
- { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, iso2022.initial_charset), 4 },
- { XD_STRUCT_PTR, offsetof(struct Lisp_Coding_System, iso2022.input_conv), 1, &ccsd_description },
- { XD_STRUCT_PTR, offsetof(struct Lisp_Coding_System, iso2022.output_conv), 1, &ccsd_description },
- { XD_LISP_OBJECT, offsetof(struct Lisp_Coding_System, ccl.decode), 2 },
+ { XD_LISP_OBJECT_ARRAY, offsetof (Lisp_Coding_System, iso2022.initial_charset), 4 },
+ { XD_STRUCT_PTR, offsetof (Lisp_Coding_System, iso2022.input_conv), 1, &ccsd_description },
+ { XD_STRUCT_PTR, offsetof (Lisp_Coding_System, iso2022.output_conv), 1, &ccsd_description },
+ { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, ccl.decode) },
+ { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, ccl.encode) },
#endif
{ XD_END }
};
mark_coding_system, print_coding_system,
finalize_coding_system,
0, 0, coding_system_description,
- struct Lisp_Coding_System);
+ Lisp_Coding_System);
static Lisp_Object
mark_coding_system (Lisp_Object obj)
*/
(coding_system_or_name))
{
- if (CODING_SYSTEMP (coding_system_or_name))
- return coding_system_or_name;
-
if (NILP (coding_system_or_name))
coding_system_or_name = Qbinary;
+ else if (CODING_SYSTEMP (coding_system_or_name))
+ return coding_system_or_name;
else
CHECK_SYMBOL (coding_system_or_name);
- return Fgethash (coding_system_or_name, Vcoding_system_hash_table, Qnil);
+ while (1)
+ {
+ coding_system_or_name =
+ Fgethash (coding_system_or_name, Vcoding_system_hash_table, Qnil);
+
+ if (CODING_SYSTEMP (coding_system_or_name) || NILP (coding_system_or_name))
+ return coding_system_or_name;
+ }
}
DEFUN ("get-coding-system", Fget_coding_system, 1, 1, 0, /*
return new_coding_system;
}
+DEFUN ("coding-system-canonical-name-p", Fcoding_system_canonical_name_p, 1, 1, 0, /*
+Return t if OBJECT names a coding system, and is not a coding system alias.
+*/
+ (object))
+{
+ return CODING_SYSTEMP (Fgethash (object, Vcoding_system_hash_table, Qnil))
+ ? Qt : Qnil;
+}
+
+DEFUN ("coding-system-alias-p", Fcoding_system_alias_p, 1, 1, 0, /*
+Return t if OBJECT is a coding system alias.
+All coding system aliases are created by `define-coding-system-alias'.
+*/
+ (object))
+{
+ return SYMBOLP (Fgethash (object, Vcoding_system_hash_table, Qzero))
+ ? Qt : Qnil;
+}
+
+DEFUN ("coding-system-aliasee", Fcoding_system_aliasee, 1, 1, 0, /*
+Return the coding-system symbol for which symbol ALIAS is an alias.
+*/
+ (alias))
+{
+ Lisp_Object aliasee = Fgethash (alias, Vcoding_system_hash_table, Qnil);
+ if (SYMBOLP (aliasee))
+ return aliasee;
+ else
+ signal_simple_error ("Symbol is not a coding system alias", alias);
+}
+
+static Lisp_Object
+append_suffix_to_symbol (Lisp_Object symbol, const char *ascii_string)
+{
+ return Fintern (concat2 (Fsymbol_name (symbol), build_string (ascii_string)),
+ Qnil);
+}
+
+/* A maphash function, for removing dangling coding system aliases. */
+static int
+dangling_coding_system_alias_p (Lisp_Object alias,
+ Lisp_Object aliasee,
+ void *dangling_aliases)
+{
+ if (SYMBOLP (aliasee)
+ && NILP (Fgethash (aliasee, Vcoding_system_hash_table, Qnil)))
+ {
+ (*(int *) dangling_aliases)++;
+ return 1;
+ }
+ else
+ return 0;
+}
+
DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, 2, 2, 0, /*
-Define symbol ALIAS as an alias for coding system CODING-SYSTEM.
+Define symbol ALIAS as an alias for coding system ALIASEE.
+
+You can use this function to redefine an alias that has already been defined,
+but you cannot redefine a name which is the canonical name for a coding system.
+\(a canonical name of a coding system is what is returned when you call
+`coding-system-name' on a coding system).
+
+ALIASEE itself can be an alias, which allows you to define nested aliases.
+
+You are forbidden, however, from creating alias loops or `dangling' aliases.
+These will be detected, and an error will be signaled if you attempt to do so.
+
+If ALIASEE is nil, then ALIAS will simply be undefined.
+
+See also `coding-system-alias-p', `coding-system-aliasee',
+and `coding-system-canonical-name-p'.
*/
- (alias, coding_system))
+ (alias, aliasee))
{
+ Lisp_Object real_coding_system, probe;
+
CHECK_SYMBOL (alias);
- if (!NILP (Ffind_coding_system (alias)))
- signal_simple_error ("Symbol already names a coding system", alias);
- coding_system = Fget_coding_system (coding_system);
- Fputhash (alias, coding_system, Vcoding_system_hash_table);
- /* Set up aliases for subsidiaries. */
- if (XCODING_SYSTEM_EOL_TYPE (coding_system) == EOL_AUTODETECT)
+ if (!NILP (Fcoding_system_canonical_name_p (alias)))
+ signal_simple_error
+ ("Symbol is the canonical name of a coding system and cannot be redefined",
+ alias);
+
+ if (NILP (aliasee))
+ {
+ Lisp_Object subsidiary_unix = append_suffix_to_symbol (alias, "-unix");
+ Lisp_Object subsidiary_dos = append_suffix_to_symbol (alias, "-dos");
+ Lisp_Object subsidiary_mac = append_suffix_to_symbol (alias, "-mac");
+
+ Fremhash (alias, Vcoding_system_hash_table);
+
+ /* Undefine subsidiary aliases,
+ presumably created by a previous call to this function */
+ if (! NILP (Fcoding_system_alias_p (subsidiary_unix)) &&
+ ! NILP (Fcoding_system_alias_p (subsidiary_dos)) &&
+ ! NILP (Fcoding_system_alias_p (subsidiary_mac)))
+ {
+ Fdefine_coding_system_alias (subsidiary_unix, Qnil);
+ Fdefine_coding_system_alias (subsidiary_dos, Qnil);
+ Fdefine_coding_system_alias (subsidiary_mac, Qnil);
+ }
+
+ /* Undefine dangling coding system aliases. */
+ {
+ int dangling_aliases;
+
+ do {
+ dangling_aliases = 0;
+ elisp_map_remhash (dangling_coding_system_alias_p,
+ Vcoding_system_hash_table,
+ &dangling_aliases);
+ } while (dangling_aliases > 0);
+ }
+
+ return Qnil;
+ }
+
+ if (CODING_SYSTEMP (aliasee))
+ aliasee = XCODING_SYSTEM_NAME (aliasee);
+
+ /* Checks that aliasee names a coding-system */
+ real_coding_system = Fget_coding_system (aliasee);
+
+ /* Check for coding system alias loops */
+ if (EQ (alias, aliasee))
+ alias_loop: signal_simple_error_2
+ ("Attempt to create a coding system alias loop", alias, aliasee);
+
+ for (probe = aliasee;
+ SYMBOLP (probe);
+ probe = Fgethash (probe, Vcoding_system_hash_table, Qzero))
{
- Lisp_Object str;
- XSETSTRING (str, symbol_name (XSYMBOL (alias)));
-#define FROB(type, name) \
- do { \
- Lisp_Object subsidiary = XCODING_SYSTEM_EOL_##type (coding_system); \
- if (!NILP (subsidiary)) \
- Fdefine_coding_system_alias \
- (Fintern (concat2 (str, build_string (name)), Qnil), subsidiary); \
- } while (0)
- FROB (LF, "-unix");
- FROB (CRLF, "-dos");
- FROB (CR, "-mac");
-#undef FROB
+ if (EQ (probe, alias))
+ goto alias_loop;
}
+
+ Fputhash (alias, aliasee, Vcoding_system_hash_table);
+
+ /* Set up aliases for subsidiaries.
+ #### There must be a better way to handle subsidiary coding systems. */
+ {
+ static const char *suffixes[] = { "-unix", "-dos", "-mac" };
+ int i;
+ for (i = 0; i < countof (suffixes); i++)
+ {
+ Lisp_Object alias_subsidiary =
+ append_suffix_to_symbol (alias, suffixes[i]);
+ Lisp_Object aliasee_subsidiary =
+ append_suffix_to_symbol (aliasee, suffixes[i]);
+
+ if (! NILP (Ffind_coding_system (aliasee_subsidiary)))
+ Fdefine_coding_system_alias (alias_subsidiary, aliasee_subsidiary);
+ }
+ }
/* FSF return value is a vector of [ALIAS-unix ALIAS-dos ALIAS-mac],
but it doesn't look intentional, so I'd rather return something
meaningful or nothing at all. */
}
\f
-/************************************************************************/
-/* Simple internal/external functions */
-/************************************************************************/
-
-static Extbyte_dynarr *conversion_out_dynarr;
-static Bufbyte_dynarr *conversion_in_dynarr;
-
-/* Determine coding system from coding format */
-
-/* #### not correct for all values of `fmt'! */
-static Lisp_Object
-external_data_format_to_coding_system (enum external_data_format fmt)
-{
- switch (fmt)
- {
- case FORMAT_FILENAME:
- case FORMAT_TERMINAL:
- if (EQ (Vfile_name_coding_system, Qnil) ||
- EQ (Vfile_name_coding_system, Qbinary))
- return Qnil;
- else
- return Fget_coding_system (Vfile_name_coding_system);
-#ifdef MULE
- case FORMAT_CTEXT:
- return Fget_coding_system (Qctext);
-#endif
- default:
- return Qnil;
- }
-}
-
-Extbyte *
-convert_to_external_format (CONST Bufbyte *ptr,
- Bytecount len,
- Extcount *len_out,
- enum external_data_format fmt)
-{
- Lisp_Object coding_system = external_data_format_to_coding_system (fmt);
-
- if (!conversion_out_dynarr)
- conversion_out_dynarr = Dynarr_new (Extbyte);
- else
- Dynarr_reset (conversion_out_dynarr);
-
- if (NILP (coding_system))
- {
- CONST Bufbyte *end = ptr + len;
-
- for (; ptr < end;)
- {
- Bufbyte c =
- (BYTE_ASCII_P (*ptr)) ? *ptr :
- (*ptr == LEADING_BYTE_CONTROL_1) ? (*(ptr+1) - 0x20) :
- (*ptr == LEADING_BYTE_LATIN_ISO8859_1) ? (*(ptr+1)) :
- '~';
-
- Dynarr_add (conversion_out_dynarr, (Extbyte) c);
- INC_CHARPTR (ptr);
- }
-
-#ifdef ERROR_CHECK_BUFPOS
- assert (ptr == end);
-#endif
- }
- else
- {
- Lisp_Object instream, outstream, da_outstream;
- Lstream *istr, *ostr;
- struct gcpro gcpro1, gcpro2, gcpro3;
- char tempbuf[1024]; /* some random amount */
-
- instream = make_fixed_buffer_input_stream ((unsigned char *) ptr, len);
- da_outstream = make_dynarr_output_stream
- ((unsigned_char_dynarr *) conversion_out_dynarr);
- outstream =
- make_encoding_output_stream (XLSTREAM (da_outstream), coding_system);
- istr = XLSTREAM (instream);
- ostr = XLSTREAM (outstream);
- GCPRO3 (instream, outstream, da_outstream);
- while (1)
- {
- ssize_t size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
- if (!size_in_bytes)
- break;
- Lstream_write (ostr, tempbuf, size_in_bytes);
- }
- Lstream_close (istr);
- Lstream_close (ostr);
- UNGCPRO;
- Lstream_delete (istr);
- Lstream_delete (ostr);
- Lstream_delete (XLSTREAM (da_outstream));
- }
-
- *len_out = Dynarr_length (conversion_out_dynarr);
- Dynarr_add (conversion_out_dynarr, 0); /* remember to zero-terminate! */
- return Dynarr_atp (conversion_out_dynarr, 0);
-}
-
-Bufbyte *
-convert_from_external_format (CONST Extbyte *ptr,
- Extcount len,
- Bytecount *len_out,
- enum external_data_format fmt)
-{
- Lisp_Object coding_system = external_data_format_to_coding_system (fmt);
-
- if (!conversion_in_dynarr)
- conversion_in_dynarr = Dynarr_new (Bufbyte);
- else
- Dynarr_reset (conversion_in_dynarr);
-
- if (NILP (coding_system))
- {
- CONST Extbyte *end = ptr + len;
- for (; ptr < end; ptr++)
- {
- Extbyte c = *ptr;
- DECODE_ADD_BINARY_CHAR (c, conversion_in_dynarr);
- }
- }
- else
- {
- Lisp_Object instream, outstream, da_outstream;
- Lstream *istr, *ostr;
- struct gcpro gcpro1, gcpro2, gcpro3;
- char tempbuf[1024]; /* some random amount */
-
- instream = make_fixed_buffer_input_stream ((unsigned char *) ptr, len);
- da_outstream = make_dynarr_output_stream
- ((unsigned_char_dynarr *) conversion_in_dynarr);
- outstream =
- make_decoding_output_stream (XLSTREAM (da_outstream), coding_system);
- istr = XLSTREAM (instream);
- ostr = XLSTREAM (outstream);
- GCPRO3 (instream, outstream, da_outstream);
- while (1)
- {
- ssize_t size_in_bytes = Lstream_read (istr, tempbuf, sizeof (tempbuf));
- if (!size_in_bytes)
- break;
- Lstream_write (ostr, tempbuf, size_in_bytes);
- }
- Lstream_close (istr);
- Lstream_close (ostr);
- UNGCPRO;
- Lstream_delete (istr);
- Lstream_delete (ostr);
- Lstream_delete (XLSTREAM (da_outstream));
- }
- *len_out = Dynarr_length (conversion_in_dynarr);
- Dynarr_add (conversion_in_dynarr, 0); /* remember to zero-terminate! */
- return Dynarr_atp (conversion_in_dynarr, 0);
-}
-
-\f
/************************************************************************/
/* Initialization */
/************************************************************************/
DEFSUBR (Fcoding_system_name);
DEFSUBR (Fmake_coding_system);
DEFSUBR (Fcopy_coding_system);
+ DEFSUBR (Fcoding_system_canonical_name_p);
+ DEFSUBR (Fcoding_system_alias_p);
+ DEFSUBR (Fcoding_system_aliasee);
DEFSUBR (Fdefine_coding_system_alias);
DEFSUBR (Fsubsidiary_coding_system);
defsymbol (&Qdecode, "decode");
#ifdef MULE
- defsymbol (&Qctext, "ctext");
defsymbol (&coding_category_symbol[CODING_CATEGORY_SHIFT_JIS],
"shift-jis");
defsymbol (&coding_category_symbol[CODING_CATEGORY_BIG5],
Vterminal_coding_system = Qnil;
DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read /*
-Overriding coding system used when writing a file or process.
-You should *bind* this, not set it. If this is non-nil, it specifies
-the coding system that will be used when a file or process is read
-in, and overrides `buffer-file-coding-system-for-read',
+Overriding coding system used when reading from a file or process.
+You should bind this variable with `let', but do not set it globally.
+If this is non-nil, it specifies the coding system that will be used
+to decode input on read operations, such as from a file or process.
+It overrides `buffer-file-coding-system-for-read',
`insert-file-contents-pre-hook', etc. Use those variables instead of
-this one for permanent changes to the environment.
-*/ );
+this one for permanent changes to the environment. */ );
Vcoding_system_for_read = Qnil;
DEFVAR_LISP ("coding-system-for-write",
&Vcoding_system_for_write /*
-Overriding coding system used when writing a file or process.
-You should *bind* this, not set it. If this is non-nil, it specifies
-the coding system that will be used when a file or process is wrote
-in, and overrides `buffer-file-coding-system',
-`write-region-pre-hook', etc. Use those variables instead of this one
-for permanent changes to the environment.
-*/ );
+Overriding coding system used when writing to a file or process.
+You should bind this variable with `let', but do not set it globally.
+If this is non-nil, it specifies the coding system that will be used
+to encode output for write operations, such as to a file or process.
+It overrides `buffer-file-coding-system', `write-region-pre-hook', etc.
+Use those variables instead of this one for permanent changes to the
+environment. */ );
Vcoding_system_for_write = Qnil;
DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system /*
Fdefine_coding_system_alias (Qno_conversion, Qraw_text);
+ Fdefine_coding_system_alias (Qfile_name, Qbinary);
+
+ Fdefine_coding_system_alias (Qterminal, Qbinary);
+ Fdefine_coding_system_alias (Qkeyboard, Qbinary);
+
/* Need this for bootstrapping */
fcd->coding_category_system[CODING_CATEGORY_NO_CONVERSION] =
Fget_coding_system (Qraw_text);
projects / chise / xemacs-chise.git.1 / blobdiff