diff options
Diffstat (limited to 'src/coding.c')
| -rw-r--r-- | src/coding.c | 177 |
1 files changed, 135 insertions, 42 deletions
diff --git a/src/coding.c b/src/coding.c index b0dfc498add..74cf232cfb2 100644 --- a/src/coding.c +++ b/src/coding.c @@ -847,16 +847,16 @@ static int encode_coding_ccl (struct coding_system *); static void decode_coding_raw_text (struct coding_system *); static int encode_coding_raw_text (struct coding_system *); -static void coding_set_source (struct coding_system *); -static void coding_set_destination (struct coding_system *); +static ptrdiff_t coding_set_source (struct coding_system *); +static ptrdiff_t coding_set_destination (struct coding_system *); static void coding_alloc_by_realloc (struct coding_system *, ptrdiff_t); static void coding_alloc_by_making_gap (struct coding_system *, ptrdiff_t, ptrdiff_t); static unsigned char *alloc_destination (struct coding_system *, ptrdiff_t, unsigned char *); static void setup_iso_safe_charsets (Lisp_Object); -static unsigned char *encode_designation_at_bol (struct coding_system *, - int *, unsigned char *); +static int encode_designation_at_bol (struct coding_system *, + int *, int *, unsigned char *); static int detect_eol (const unsigned char *, ptrdiff_t, enum coding_category); static Lisp_Object adjust_coding_eol_type (struct coding_system *, int); @@ -915,27 +915,68 @@ record_conversion_result (struct coding_system *coding, } } -/* This wrapper macro is used to preserve validity of pointers into - buffer text across calls to decode_char, which could cause - relocation of buffers if it loads a charset map, because loading a - charset map allocates large structures. */ +/* These wrapper macros are used to preserve validity of pointers into + buffer text across calls to decode_char, encode_char, etc, which + could cause relocation of buffers if it loads a charset map, + because loading a charset map allocates large structures. */ + #define CODING_DECODE_CHAR(coding, src, src_base, src_end, charset, code, c) \ do { \ + ptrdiff_t offset; \ + \ charset_map_loaded = 0; \ c = DECODE_CHAR (charset, code); \ - if (charset_map_loaded) \ + if (charset_map_loaded \ + && (offset = coding_set_source (coding))) \ { \ - const unsigned char *orig = coding->source; \ - ptrdiff_t offset; \ - \ - coding_set_source (coding); \ - offset = coding->source - orig; \ src += offset; \ src_base += offset; \ src_end += offset; \ } \ } while (0) +#define CODING_ENCODE_CHAR(coding, dst, dst_end, charset, c, code) \ + do { \ + ptrdiff_t offset; \ + \ + charset_map_loaded = 0; \ + code = ENCODE_CHAR (charset, c); \ + if (charset_map_loaded \ + && (offset = coding_set_destination (coding))) \ + { \ + dst += offset; \ + dst_end += offset; \ + } \ + } while (0) + +#define CODING_CHAR_CHARSET(coding, dst, dst_end, c, charset_list, code_return, charset) \ + do { \ + ptrdiff_t offset; \ + \ + charset_map_loaded = 0; \ + charset = char_charset (c, charset_list, code_return); \ + if (charset_map_loaded \ + && (offset = coding_set_destination (coding))) \ + { \ + dst += offset; \ + dst_end += offset; \ + } \ + } while (0) + +#define CODING_CHAR_CHARSET_P(coding, dst, dst_end, c, charset, result) \ + do { \ + ptrdiff_t offset; \ + \ + charset_map_loaded = 0; \ + result = CHAR_CHARSET_P (c, charset); \ + if (charset_map_loaded \ + && (offset = coding_set_destination (coding))) \ + { \ + dst += offset; \ + dst_end += offset; \ + } \ + } while (0) + /* If there are at least BYTES length of room at dst, allocate memory for coding->destination and update dst and dst_end. We don't have @@ -1015,9 +1056,14 @@ record_conversion_result (struct coding_system *coding, | ((p)[-1] & 0x3F)))) -static void +/* Update coding->source from coding->src_object, and return how many + bytes coding->source was changed. */ + +static ptrdiff_t coding_set_source (struct coding_system *coding) { + const unsigned char *orig = coding->source; + if (BUFFERP (coding->src_object)) { struct buffer *buf = XBUFFER (coding->src_object); @@ -1036,11 +1082,18 @@ coding_set_source (struct coding_system *coding) /* Otherwise, the source is C string and is never relocated automatically. Thus we don't have to update anything. */ } + return coding->source - orig; } -static void + +/* Update coding->destination from coding->dst_object, and return how + many bytes coding->destination was changed. */ + +static ptrdiff_t coding_set_destination (struct coding_system *coding) { + const unsigned char *orig = coding->destination; + if (BUFFERP (coding->dst_object)) { if (BUFFERP (coding->src_object) && coding->src_pos < 0) @@ -1065,6 +1118,7 @@ coding_set_destination (struct coding_system *coding) /* Otherwise, the destination is C string and is never relocated automatically. Thus we don't have to update anything. */ } + return coding->destination - orig; } @@ -2650,14 +2704,19 @@ encode_coding_emacs_mule (struct coding_system *coding) if (preferred_charset_id >= 0) { + int result; + charset = CHARSET_FROM_ID (preferred_charset_id); - if (CHAR_CHARSET_P (c, charset)) + CODING_CHAR_CHARSET_P (coding, dst, dst_end, c, charset, result); + if (result) code = ENCODE_CHAR (charset, c); else - charset = char_charset (c, charset_list, &code); + CODING_CHAR_CHARSET (coding, dst, dst_end, c, charset_list, + &code, charset); } else - charset = char_charset (c, charset_list, &code); + CODING_CHAR_CHARSET (coding, dst, dst_end, c, charset_list, + &code, charset); if (! charset) { c = coding->default_char; @@ -2666,7 +2725,8 @@ encode_coding_emacs_mule (struct coding_system *coding) EMIT_ONE_ASCII_BYTE (c); continue; } - charset = char_charset (c, charset_list, &code); + CODING_CHAR_CHARSET (coding, dst, dst_end, c, charset_list, + &code, charset); } dimension = CHARSET_DIMENSION (charset); emacs_mule_id = CHARSET_EMACS_MULE_ID (charset); @@ -4185,7 +4245,8 @@ decode_coding_iso_2022 (struct coding_system *coding) #define ENCODE_ISO_CHARACTER(charset, c) \ do { \ - unsigned code = ENCODE_CHAR ((charset), (c)); \ + unsigned code; \ + CODING_ENCODE_CHAR (coding, dst, dst_end, (charset), (c), code); \ \ if (CHARSET_DIMENSION (charset) == 1) \ ENCODE_ISO_CHARACTER_DIMENSION1 ((charset), code); \ @@ -4283,15 +4344,19 @@ encode_invocation_designation (struct charset *charset, /* Produce designation sequences of charsets in the line started from - SRC to a place pointed by DST, and return updated DST. + CHARBUF to a place pointed by DST, and return the number of + produced bytes. DST should not directly point a buffer text area + which may be relocated by char_charset call. If the current block ends before any end-of-line, we may fail to find all the necessary designations. */ -static unsigned char * -encode_designation_at_bol (struct coding_system *coding, int *charbuf, +static int +encode_designation_at_bol (struct coding_system *coding, + int *charbuf, int *charbuf_end, unsigned char *dst) { + unsigned char *orig = dst; struct charset *charset; /* Table of charsets to be designated to each graphic register. */ int r[4]; @@ -4309,7 +4374,7 @@ encode_designation_at_bol (struct coding_system *coding, int *charbuf, for (reg = 0; reg < 4; reg++) r[reg] = -1; - while (found < 4) + while (charbuf < charbuf_end && found < 4) { int id; @@ -4334,7 +4399,7 @@ encode_designation_at_bol (struct coding_system *coding, int *charbuf, ENCODE_DESIGNATION (CHARSET_FROM_ID (r[reg]), reg, coding); } - return dst; + return dst - orig; } /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". */ @@ -4378,13 +4443,26 @@ encode_coding_iso_2022 (struct coding_system *coding) if (bol_designation) { - unsigned char *dst_prev = dst; - /* We have to produce designation sequences if any now. */ - dst = encode_designation_at_bol (coding, charbuf, dst); - bol_designation = 0; + unsigned char desig_buf[16]; + int nbytes; + ptrdiff_t offset; + + charset_map_loaded = 0; + nbytes = encode_designation_at_bol (coding, charbuf, charbuf_end, + desig_buf); + if (charset_map_loaded + && (offset = coding_set_destination (coding))) + { + dst += offset; + dst_end += offset; + } + memcpy (dst, desig_buf, nbytes); + dst += nbytes; /* We are sure that designation sequences are all ASCII bytes. */ - produced_chars += dst - dst_prev; + produced_chars += nbytes; + bol_designation = 0; + ASSURE_DESTINATION (safe_room); } c = *charbuf++; @@ -4455,12 +4533,17 @@ encode_coding_iso_2022 (struct coding_system *coding) if (preferred_charset_id >= 0) { + int result; + charset = CHARSET_FROM_ID (preferred_charset_id); - if (! CHAR_CHARSET_P (c, charset)) - charset = char_charset (c, charset_list, NULL); + CODING_CHAR_CHARSET_P (coding, dst, dst_end, c, charset, result); + if (! result) + CODING_CHAR_CHARSET (coding, dst, dst_end, c, charset_list, + NULL, charset); } else - charset = char_charset (c, charset_list, NULL); + CODING_CHAR_CHARSET (coding, dst, dst_end, c, charset_list, + NULL, charset); if (!charset) { if (coding->mode & CODING_MODE_SAFE_ENCODING) @@ -4471,7 +4554,8 @@ encode_coding_iso_2022 (struct coding_system *coding) else { c = coding->default_char; - charset = char_charset (c, charset_list, NULL); + CODING_CHAR_CHARSET (coding, dst, dst_end, c, + charset_list, NULL, charset); } } ENCODE_ISO_CHARACTER (charset, c); @@ -4897,7 +4981,9 @@ encode_coding_sjis (struct coding_system *coding) else { unsigned code; - struct charset *charset = char_charset (c, charset_list, &code); + struct charset *charset; + CODING_CHAR_CHARSET (coding, dst, dst_end, c, charset_list, + &code, charset); if (!charset) { @@ -4909,7 +4995,8 @@ encode_coding_sjis (struct coding_system *coding) else { c = coding->default_char; - charset = char_charset (c, charset_list, &code); + CODING_CHAR_CHARSET (coding, dst, dst_end, c, + charset_list, &code, charset); } } if (code == CHARSET_INVALID_CODE (charset)) @@ -4984,7 +5071,9 @@ encode_coding_big5 (struct coding_system *coding) else { unsigned code; - struct charset *charset = char_charset (c, charset_list, &code); + struct charset *charset; + CODING_CHAR_CHARSET (coding, dst, dst_end, c, charset_list, + &code, charset); if (! charset) { @@ -4996,7 +5085,8 @@ encode_coding_big5 (struct coding_system *coding) else { c = coding->default_char; - charset = char_charset (c, charset_list, &code); + CODING_CHAR_CHARSET (coding, dst, dst_end, c, + charset_list, &code, charset); } } if (code == CHARSET_INVALID_CODE (charset)) @@ -5154,7 +5244,7 @@ encode_coding_ccl (struct coding_system *coding) && coding->mode & CODING_MODE_LAST_BLOCK) ccl->last_block = 1; - while (charbuf < charbuf_end) + do { ccl_driver (ccl, charbuf, destination_charbuf, charbuf_end - charbuf, 1024, charset_list); @@ -5176,6 +5266,7 @@ encode_coding_ccl (struct coding_system *coding) || ccl->status == CCL_STAT_INVALID_CMD) break; } + while (charbuf < charbuf_end); switch (ccl->status) { @@ -5572,7 +5663,9 @@ encode_coding_charset (struct coding_system *coding) } else { - charset = char_charset (c, charset_list, &code); + CODING_CHAR_CHARSET (coding, dst, dst_end, c, charset_list, + &code, charset); + if (charset) { if (CHARSET_DIMENSION (charset) == 1) @@ -9207,7 +9300,7 @@ frame's terminal device. */) = TERMINAL_TERMINAL_CODING (get_terminal (terminal, 1)); Lisp_Object coding_system = CODING_ID_NAME (terminal_coding->id); - /* For backward compatibility, return nil if it is `undecided'. */ + /* For backward compatibility, return nil if it is `undecided'. */ return (! EQ (coding_system, Qundecided) ? coding_system : Qnil); } |