/* String search routines for GNU Emacs.
-Copyright (C) 1985-1987, 1993-1994, 1997-1999, 2001-2012
- Free Software Foundation, Inc.
+Copyright (C) 1985-1987, 1993-1994, 1997-1999, 2001-2013 Free Software
+Foundation, Inc.
This file is part of GNU Emacs.
for this pattern. 0 means backtrack only enough to get a valid match. */
struct re_pattern_buffer *
-compile_pattern (Lisp_Object pattern, struct re_registers *regp, Lisp_Object translate, int posix, int multibyte)
+compile_pattern (Lisp_Object pattern, struct re_registers *regp,
+ Lisp_Object translate, int posix, bool multibyte)
{
struct regexp_cache *cp, **cpp;
data. */
ptrdiff_t
-fast_looking_at (Lisp_Object regexp, ptrdiff_t pos, ptrdiff_t pos_byte, ptrdiff_t limit, ptrdiff_t limit_byte, Lisp_Object string)
+fast_looking_at (Lisp_Object regexp, ptrdiff_t pos, ptrdiff_t pos_byte,
+ ptrdiff_t limit, ptrdiff_t limit_byte, Lisp_Object string)
{
- int multibyte;
+ bool multibyte;
struct re_pattern_buffer *buf;
unsigned char *p1, *p2;
ptrdiff_t s1, s2;
}
\f
-/* Search for COUNT instances of the character TARGET between START and END.
+/* Search for COUNT newlines between START/START_BYTE and END/END_BYTE.
If COUNT is positive, search forwards; END must be >= START.
If COUNT is negative, search backwards for the -COUNTth instance;
this is not the same as the usual convention for Emacs motion commands.
If we don't find COUNT instances before reaching END, set *SHORTAGE
- to the number of TARGETs left unfound, and return END.
+ to the number of newlines left unfound, and return END.
- If ALLOW_QUIT is non-zero, set immediate_quit. That's good to do
+ If BYTEPOS is not NULL, set *BYTEPOS to the byte position corresponding
+ to the returned character position.
+
+ If ALLOW_QUIT, set immediate_quit. That's good to do
except when inside redisplay. */
ptrdiff_t
-scan_buffer (register int target, ptrdiff_t start, ptrdiff_t end,
- ptrdiff_t count, ptrdiff_t *shortage, int allow_quit)
+find_newline (ptrdiff_t start, ptrdiff_t start_byte, ptrdiff_t end,
+ ptrdiff_t end_byte, ptrdiff_t count, ptrdiff_t *shortage,
+ ptrdiff_t *bytepos, bool allow_quit)
{
struct region_cache *newline_cache;
int direction;
if (count > 0)
{
direction = 1;
- if (! end) end = ZV;
+ if (!end)
+ end = ZV, end_byte = ZV_BYTE;
}
else
{
direction = -1;
- if (! end) end = BEGV;
+ if (!end)
+ end = BEGV, end_byte = BEGV_BYTE;
}
+ if (end_byte == -1)
+ end_byte = CHAR_TO_BYTE (end);
newline_cache_on_off (current_buffer);
newline_cache = current_buffer->newline_cache;
the position of the last character before the next such
obstacle --- the last character the dumb search loop should
examine. */
- ptrdiff_t ceiling_byte = CHAR_TO_BYTE (end) - 1;
- ptrdiff_t start_byte;
- ptrdiff_t tem;
+ ptrdiff_t tem, ceiling_byte = end_byte - 1;
/* If we're looking for a newline, consult the newline cache
to see where we can avoid some scanning. */
- if (target == '\n' && newline_cache)
+ if (newline_cache)
{
ptrdiff_t next_change;
immediate_quit = 0;
next_change is the position of the next known region. */
ceiling_byte = min (CHAR_TO_BYTE (next_change) - 1, ceiling_byte);
}
- else
+ else if (start_byte == -1)
start_byte = CHAR_TO_BYTE (start);
/* The dumb loop can only scan text stored in contiguous
while (cursor < ceiling_addr)
{
- unsigned char *scan_start = cursor;
-
/* The dumb loop. */
- while (*cursor != target && ++cursor < ceiling_addr)
- ;
+ unsigned char *nl = memchr (cursor, '\n', ceiling_addr - cursor);
/* If we're looking for newlines, cache the fact that
the region from start to cursor is free of them. */
- if (target == '\n' && newline_cache)
- know_region_cache (current_buffer, newline_cache,
- BYTE_TO_CHAR (start_byte + scan_start - base),
- BYTE_TO_CHAR (start_byte + cursor - base));
-
- /* Did we find the target character? */
- if (cursor < ceiling_addr)
- {
- if (--count == 0)
- {
- immediate_quit = 0;
- return BYTE_TO_CHAR (start_byte + cursor - base + 1);
- }
- cursor++;
- }
+ if (newline_cache)
+ {
+ unsigned char *low = cursor;
+ unsigned char *lim = nl ? nl : ceiling_addr;
+ know_region_cache (current_buffer, newline_cache,
+ BYTE_TO_CHAR (low - base + start_byte),
+ BYTE_TO_CHAR (lim - base + start_byte));
+ }
+
+ if (! nl)
+ break;
+
+ if (--count == 0)
+ {
+ immediate_quit = 0;
+ if (bytepos)
+ *bytepos = nl + 1 - base + start_byte;
+ return BYTE_TO_CHAR (nl + 1 - base + start_byte);
+ }
+ cursor = nl + 1;
}
- start = BYTE_TO_CHAR (start_byte + cursor - base);
+ start_byte += ceiling_addr - base;
+ start = BYTE_TO_CHAR (start_byte);
}
}
else
while (start > end)
{
/* The last character to check before the next obstacle. */
- ptrdiff_t ceiling_byte = CHAR_TO_BYTE (end);
- ptrdiff_t start_byte;
- ptrdiff_t tem;
+ ptrdiff_t tem, ceiling_byte = end_byte;
/* Consult the newline cache, if appropriate. */
- if (target == '\n' && newline_cache)
+ if (newline_cache)
{
ptrdiff_t next_change;
immediate_quit = 0;
next_change is the position of the next known region. */
ceiling_byte = max (CHAR_TO_BYTE (next_change), ceiling_byte);
}
- else
+ else if (start_byte == -1)
start_byte = CHAR_TO_BYTE (start);
/* Stop scanning before the gap. */
while (cursor >= ceiling_addr)
{
- unsigned char *scan_start = cursor;
-
- while (*cursor != target && --cursor >= ceiling_addr)
- ;
+ unsigned char *nl = memrchr (ceiling_addr, '\n',
+ cursor + 1 - ceiling_addr);
/* If we're looking for newlines, cache the fact that
the region from after the cursor to start is free of them. */
- if (target == '\n' && newline_cache)
- know_region_cache (current_buffer, newline_cache,
- BYTE_TO_CHAR (start_byte + cursor - base),
- BYTE_TO_CHAR (start_byte + scan_start - base));
-
- /* Did we find the target character? */
- if (cursor >= ceiling_addr)
- {
- if (++count >= 0)
- {
- immediate_quit = 0;
- return BYTE_TO_CHAR (start_byte + cursor - base);
- }
- cursor--;
- }
+ if (newline_cache)
+ {
+ unsigned char *low = nl ? nl : ceiling_addr - 1;
+ unsigned char *lim = cursor;
+ know_region_cache (current_buffer, newline_cache,
+ BYTE_TO_CHAR (low - base + start_byte),
+ BYTE_TO_CHAR (lim - base + start_byte));
+ }
+
+ if (! nl)
+ break;
+
+ if (++count >= 0)
+ {
+ immediate_quit = 0;
+ if (bytepos)
+ *bytepos = nl - base + start_byte;
+ return BYTE_TO_CHAR (nl - base + start_byte);
+ }
+ cursor = nl - 1;
}
- start = BYTE_TO_CHAR (start_byte + cursor - base);
+ start_byte += ceiling_addr - 1 - base;
+ start = BYTE_TO_CHAR (start_byte);
}
}
immediate_quit = 0;
- if (shortage != 0)
+ if (shortage)
*shortage = count * direction;
+ if (bytepos)
+ {
+ *bytepos = start_byte == -1 ? CHAR_TO_BYTE (start) : start_byte;
+ eassert (*bytepos == CHAR_TO_BYTE (start));
+ }
return start;
}
\f
-/* Search for COUNT instances of a line boundary, which means either a
- newline or (if selective display enabled) a carriage return.
+/* Search for COUNT instances of a line boundary.
Start at START. If COUNT is negative, search backwards.
We report the resulting position by calling TEMP_SET_PT_BOTH.
the number of line boundaries left unfound, and position at
the limit we bumped up against.
- If ALLOW_QUIT is non-zero, set immediate_quit. That's good to do
+ If ALLOW_QUIT, set immediate_quit. That's good to do
except in special cases. */
EMACS_INT
scan_newline (ptrdiff_t start, ptrdiff_t start_byte,
ptrdiff_t limit, ptrdiff_t limit_byte,
- register EMACS_INT count, int allow_quit)
+ EMACS_INT count, bool allow_quit)
{
int direction = ((count > 0) ? 1 : -1);
- register unsigned char *cursor;
+ unsigned char *cursor;
unsigned char *base;
ptrdiff_t ceiling;
- register unsigned char *ceiling_addr;
+ unsigned char *ceiling_addr;
- int old_immediate_quit = immediate_quit;
-
- /* The code that follows is like scan_buffer
- but checks for either newline or carriage return. */
+ bool old_immediate_quit = immediate_quit;
if (allow_quit)
immediate_quit++;
- start_byte = CHAR_TO_BYTE (start);
-
if (count > 0)
{
while (start_byte < limit_byte)
ceiling = min (limit_byte - 1, ceiling);
ceiling_addr = BYTE_POS_ADDR (ceiling) + 1;
base = (cursor = BYTE_POS_ADDR (start_byte));
- while (1)
- {
- while (*cursor != '\n' && ++cursor != ceiling_addr)
- ;
- if (cursor != ceiling_addr)
+ do
+ {
+ unsigned char *nl = memchr (cursor, '\n', ceiling_addr - cursor);
+ if (! nl)
+ break;
+ if (--count == 0)
{
- if (--count == 0)
- {
- immediate_quit = old_immediate_quit;
- start_byte = start_byte + cursor - base + 1;
- start = BYTE_TO_CHAR (start_byte);
- TEMP_SET_PT_BOTH (start, start_byte);
- return 0;
- }
- else
- if (++cursor == ceiling_addr)
- break;
+ immediate_quit = old_immediate_quit;
+ start_byte += nl - base + 1;
+ start = BYTE_TO_CHAR (start_byte);
+ TEMP_SET_PT_BOTH (start, start_byte);
+ return 0;
}
- else
- break;
+ cursor = nl + 1;
}
- start_byte += cursor - base;
+ while (cursor < ceiling_addr);
+
+ start_byte += ceiling_addr - base;
}
}
else
{
ceiling = BUFFER_FLOOR_OF (start_byte - 1);
ceiling = max (limit_byte, ceiling);
- ceiling_addr = BYTE_POS_ADDR (ceiling) - 1;
+ ceiling_addr = BYTE_POS_ADDR (ceiling);
base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1);
while (1)
{
- while (--cursor != ceiling_addr && *cursor != '\n')
- ;
+ unsigned char *nl = memrchr (ceiling_addr, '\n',
+ cursor - ceiling_addr);
+ if (! nl)
+ break;
- if (cursor != ceiling_addr)
+ if (++count == 0)
{
- if (++count == 0)
- {
- immediate_quit = old_immediate_quit;
- /* Return the position AFTER the match we found. */
- start_byte = start_byte + cursor - base + 1;
- start = BYTE_TO_CHAR (start_byte);
- TEMP_SET_PT_BOTH (start, start_byte);
- return 0;
- }
+ immediate_quit = old_immediate_quit;
+ /* Return the position AFTER the match we found. */
+ start_byte += nl - base + 1;
+ start = BYTE_TO_CHAR (start_byte);
+ TEMP_SET_PT_BOTH (start, start_byte);
+ return 0;
}
- else
- break;
+
+ cursor = nl;
}
- /* Here we add 1 to compensate for the last decrement
- of CURSOR, which took it past the valid range. */
- start_byte += cursor - base + 1;
+ start_byte += ceiling_addr - base;
}
}
return count * direction;
}
+/* Like find_newline, but doesn't allow QUITting and doesn't return
+ SHORTAGE. */
ptrdiff_t
-find_next_newline_no_quit (ptrdiff_t from, ptrdiff_t cnt)
+find_newline_no_quit (ptrdiff_t from, ptrdiff_t frombyte,
+ ptrdiff_t cnt, ptrdiff_t *bytepos)
{
- return scan_buffer ('\n', from, 0, cnt, (ptrdiff_t *) 0, 0);
+ return find_newline (from, frombyte, 0, -1, cnt, NULL, bytepos, 0);
}
-/* Like find_next_newline, but returns position before the newline,
- not after, and only search up to TO. This isn't just
- find_next_newline (...)-1, because you might hit TO. */
+/* Like find_newline, but returns position before the newline, not
+ after, and only search up to TO.
+ This isn't just find_newline_no_quit (...)-1, because you might hit TO. */
ptrdiff_t
-find_before_next_newline (ptrdiff_t from, ptrdiff_t to, ptrdiff_t cnt)
+find_before_next_newline (ptrdiff_t from, ptrdiff_t to,
+ ptrdiff_t cnt, ptrdiff_t *bytepos)
{
ptrdiff_t shortage;
- ptrdiff_t pos = scan_buffer ('\n', from, to, cnt, &shortage, 1);
+ ptrdiff_t pos = find_newline (from, -1, to, -1, cnt, &shortage, bytepos, 1);
if (shortage == 0)
- pos--;
-
+ {
+ if (bytepos)
+ DEC_BOTH (pos, *bytepos);
+ else
+ pos--;
+ }
return pos;
}
\f
if (!EQ (noerror, Qt))
{
- if (lim < BEGV || lim > ZV)
- emacs_abort ();
+ eassert (BEGV <= lim && lim <= ZV);
SET_PT_BOTH (lim, lim_byte);
return Qnil;
#if 0 /* This would be clean, but maybe programs depend on
return Qnil;
}
- if (np < BEGV || np > ZV)
- emacs_abort ();
-
+ eassert (BEGV <= np && np <= ZV);
SET_PT (np);
return make_number (np);
ptrdiff_t raw_pattern_size;
ptrdiff_t raw_pattern_size_byte;
unsigned char *patbuf;
- int multibyte = !NILP (BVAR (current_buffer, enable_multibyte_characters));
+ bool multibyte = !NILP (BVAR (current_buffer, enable_multibyte_characters));
unsigned char *base_pat;
/* Set to positive if we find a non-ASCII char that need
translation. Otherwise set to zero later. */
non-nil, we can use boyer-moore search only if TRT can be
represented by the byte array of 256 elements. For that,
all non-ASCII case-equivalents of all case-sensitive
- characters in STRING must belong to the same charset and
- row. */
+ characters in STRING must belong to the same character
+ group (two characters belong to the same group iff their
+ multibyte forms are the same except for the last byte;
+ i.e. every 64 characters form a group; U+0000..U+003F,
+ U+0040..U+007F, U+0080..U+00BF, ...). */
while (--len >= 0)
{
char_base = 0;
while (--len >= 0)
{
- int c, translated;
+ int c, translated, inverse;
/* If we got here and the RE flag is set, it's because we're
dealing with a regexp known to be trivial, so the backslash
c = *base_pat++;
TRANSLATE (translated, trt, c);
*pat++ = translated;
+ /* Check that none of C's equivalents violates the
+ assumptions of boyer_moore. */
+ TRANSLATE (inverse, inverse_trt, c);
+ while (1)
+ {
+ if (inverse >= 0200)
+ {
+ boyer_moore_ok = 0;
+ break;
+ }
+ if (c == inverse)
+ break;
+ TRANSLATE (inverse, inverse_trt, inverse);
+ }
}
}
ptrdiff_t pos, ptrdiff_t pos_byte,
ptrdiff_t lim, ptrdiff_t lim_byte)
{
- int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters));
- int forward = n > 0;
+ bool multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters));
+ bool forward = n > 0;
/* Number of buffer bytes matched. Note that this may be different
from len_byte in a multibyte buffer. */
ptrdiff_t match_byte = PTRDIFF_MIN;
register ptrdiff_t i;
register int j;
unsigned char *pat, *pat_end;
- int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters));
+ bool multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters));
unsigned char simple_translate[0400];
/* These are set to the preceding bytes of a byte to be translated
ptrdiff_t length = SBYTES (newtext);
unsigned char *substed;
ptrdiff_t substed_alloc_size, substed_len;
- int buf_multibyte = !NILP (BVAR (current_buffer, enable_multibyte_characters));
- int str_multibyte = STRING_MULTIBYTE (newtext);
+ bool buf_multibyte = !NILP (BVAR (current_buffer, enable_multibyte_characters));
+ bool str_multibyte = STRING_MULTIBYTE (newtext);
int really_changed = 0;
substed_alloc_size = ((STRING_BYTES_BOUND - 100) / 2 < length
ptrdiff_t begbyte = CHAR_TO_BYTE (search_regs.start[idx]);
add_len = CHAR_TO_BYTE (search_regs.end[idx]) - begbyte;
if (search_regs.start[idx] < GPT && GPT < search_regs.end[idx])
- move_gap (search_regs.start[idx]);
+ move_gap_both (search_regs.start[idx], begbyte);
add_stuff = BYTE_POS_ADDR (begbyte);
}
HCoop / bpt / emacs.git / blobdiff