1 /* This is the Assembler Pre-Processor
2 Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2006, 2007
4 Free Software Foundation, Inc.
6 This file is part of GAS, the GNU Assembler.
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
23 /* Modified by Allen Wirfs-Brock, Instantiations Inc 2/90. */
24 /* App, the assembler pre-processor. This pre-processor strips out
25 excess spaces, turns single-quoted characters into a decimal
26 constant, and turns the # in # <number> <filename> <garbage> into a
27 .linefile. This needs better error-handling. */
33 #define const /* empty */
38 /* Whether we are scrubbing in m68k MRI mode. This is different from
39 flag_m68k_mri, because the two flags will be affected by the .mri
40 pseudo-op at different times. */
41 static int scrub_m68k_mri;
43 /* The pseudo-op which switches in and out of MRI mode. See the
44 comment in do_scrub_chars. */
45 static const char mri_pseudo[] = ".mri 0";
47 #define scrub_m68k_mri 0
50 #if defined TC_ARM && defined OBJ_ELF
51 /* The pseudo-op for which we need to special-case `@' characters.
52 See the comment in do_scrub_chars. */
53 static const char symver_pseudo[] = ".symver";
54 static const char * symver_state;
58 static const char symbol_chars[] =
59 "$._ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
61 #define LEX_IS_SYMBOL_COMPONENT 1
62 #define LEX_IS_WHITESPACE 2
63 #define LEX_IS_LINE_SEPARATOR 3
64 #define LEX_IS_COMMENT_START 4
65 #define LEX_IS_LINE_COMMENT_START 5
66 #define LEX_IS_TWOCHAR_COMMENT_1ST 6
67 #define LEX_IS_STRINGQUOTE 8
68 #define LEX_IS_COLON 9
69 #define LEX_IS_NEWLINE 10
70 #define LEX_IS_ONECHAR_QUOTE 11
72 #define LEX_IS_DOUBLEDASH_1ST 12
75 #define DOUBLEBAR_PARALLEL
77 #ifdef DOUBLEBAR_PARALLEL
78 #define LEX_IS_DOUBLEBAR_1ST 13
80 #define LEX_IS_PARALLEL_SEPARATOR 14
81 #define IS_SYMBOL_COMPONENT(c) (lex[c] == LEX_IS_SYMBOL_COMPONENT)
82 #define IS_WHITESPACE(c) (lex[c] == LEX_IS_WHITESPACE)
83 #define IS_LINE_SEPARATOR(c) (lex[c] == LEX_IS_LINE_SEPARATOR)
84 #define IS_PARALLEL_SEPARATOR(c) (lex[c] == LEX_IS_PARALLEL_SEPARATOR)
85 #define IS_COMMENT(c) (lex[c] == LEX_IS_COMMENT_START)
86 #define IS_LINE_COMMENT(c) (lex[c] == LEX_IS_LINE_COMMENT_START)
87 #define IS_NEWLINE(c) (lex[c] == LEX_IS_NEWLINE)
89 static int process_escape (int);
91 /* FIXME-soon: The entire lexer/parser thingy should be
92 built statically at compile time rather than dynamically
93 each and every time the assembler is run. xoxorich. */
96 do_scrub_begin (int m68k_mri ATTRIBUTE_UNUSED)
101 lex[' '] = LEX_IS_WHITESPACE;
102 lex['\t'] = LEX_IS_WHITESPACE;
103 lex['\r'] = LEX_IS_WHITESPACE;
104 lex['\n'] = LEX_IS_NEWLINE;
105 lex[':'] = LEX_IS_COLON;
108 scrub_m68k_mri = m68k_mri;
113 lex['"'] = LEX_IS_STRINGQUOTE;
115 #if ! defined (TC_HPPA) && ! defined (TC_I370)
116 /* I370 uses single-quotes to delimit integer, float constants. */
117 lex['\''] = LEX_IS_ONECHAR_QUOTE;
120 #ifdef SINGLE_QUOTE_STRINGS
121 lex['\''] = LEX_IS_STRINGQUOTE;
125 /* Note: if any other character can be LEX_IS_STRINGQUOTE, the loop
126 in state 5 of do_scrub_chars must be changed. */
128 /* Note that these override the previous defaults, e.g. if ';' is a
129 comment char, then it isn't a line separator. */
130 for (p = symbol_chars; *p; ++p)
131 lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT;
133 for (c = 128; c < 256; ++c)
134 lex[c] = LEX_IS_SYMBOL_COMPONENT;
136 #ifdef tc_symbol_chars
137 /* This macro permits the processor to specify all characters which
138 may appears in an operand. This will prevent the scrubber from
139 discarding meaningful whitespace in certain cases. The i386
140 backend uses this to support prefixes, which can confuse the
141 scrubber as to whether it is parsing operands or opcodes. */
142 for (p = tc_symbol_chars; *p; ++p)
143 lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT;
146 /* The m68k backend wants to be able to change comment_chars. */
147 #ifndef tc_comment_chars
148 #define tc_comment_chars comment_chars
150 for (p = tc_comment_chars; *p; p++)
151 lex[(unsigned char) *p] = LEX_IS_COMMENT_START;
153 for (p = line_comment_chars; *p; p++)
154 lex[(unsigned char) *p] = LEX_IS_LINE_COMMENT_START;
156 for (p = line_separator_chars; *p; p++)
157 lex[(unsigned char) *p] = LEX_IS_LINE_SEPARATOR;
159 #ifdef tc_parallel_separator_chars
160 /* This macro permits the processor to specify all characters which
161 separate parallel insns on the same line. */
162 for (p = tc_parallel_separator_chars; *p; p++)
163 lex[(unsigned char) *p] = LEX_IS_PARALLEL_SEPARATOR;
166 /* Only allow slash-star comments if slash is not in use.
167 FIXME: This isn't right. We should always permit them. */
169 lex['/'] = LEX_IS_TWOCHAR_COMMENT_1ST;
174 lex['\''] = LEX_IS_STRINGQUOTE;
175 lex[';'] = LEX_IS_COMMENT_START;
176 lex['*'] = LEX_IS_LINE_COMMENT_START;
177 /* The MRI documentation says '!' is LEX_IS_COMMENT_START, but
178 then it can't be used in an expression. */
179 lex['!'] = LEX_IS_LINE_COMMENT_START;
184 lex['-'] = LEX_IS_DOUBLEDASH_1ST;
186 #ifdef DOUBLEBAR_PARALLEL
187 lex['|'] = LEX_IS_DOUBLEBAR_1ST;
190 /* Must do this is we want VLIW instruction with "->" or "<-". */
191 lex['-'] = LEX_IS_SYMBOL_COMPONENT;
195 /* Saved state of the scrubber. */
197 static int old_state;
198 static char *out_string;
199 static char out_buf[20];
200 static int add_newlines;
201 static char *saved_input;
202 static int saved_input_len;
203 static char input_buffer[32 * 1024];
204 static const char *mri_state;
205 static char mri_last_ch;
207 /* Data structure for saving the state of app across #include's. Note that
208 app is called asynchronously to the parsing of the .include's, so our
209 state at the time .include is interpreted is completely unrelated.
210 That's why we have to save it all. */
217 char out_buf[sizeof (out_buf)];
224 const char * mri_state;
226 #if defined TC_ARM && defined OBJ_ELF
227 const char * symver_state;
234 register struct app_save *saved;
236 saved = (struct app_save *) xmalloc (sizeof (*saved));
237 saved->state = state;
238 saved->old_state = old_state;
239 saved->out_string = out_string;
240 memcpy (saved->out_buf, out_buf, sizeof (out_buf));
241 saved->add_newlines = add_newlines;
242 if (saved_input == NULL)
243 saved->saved_input = NULL;
246 saved->saved_input = xmalloc (saved_input_len);
247 memcpy (saved->saved_input, saved_input, saved_input_len);
248 saved->saved_input_len = saved_input_len;
251 saved->scrub_m68k_mri = scrub_m68k_mri;
253 saved->mri_state = mri_state;
254 saved->mri_last_ch = mri_last_ch;
255 #if defined TC_ARM && defined OBJ_ELF
256 saved->symver_state = symver_state;
259 /* do_scrub_begin() is not useful, just wastes time. */
264 return (char *) saved;
270 register struct app_save *saved = (struct app_save *) arg;
272 /* There is no do_scrub_end (). */
273 state = saved->state;
274 old_state = saved->old_state;
275 out_string = saved->out_string;
276 memcpy (out_buf, saved->out_buf, sizeof (out_buf));
277 add_newlines = saved->add_newlines;
278 if (saved->saved_input == NULL)
282 assert (saved->saved_input_len <= (int) (sizeof input_buffer));
283 memcpy (input_buffer, saved->saved_input, saved->saved_input_len);
284 saved_input = input_buffer;
285 saved_input_len = saved->saved_input_len;
286 free (saved->saved_input);
289 scrub_m68k_mri = saved->scrub_m68k_mri;
291 mri_state = saved->mri_state;
292 mri_last_ch = saved->mri_last_ch;
293 #if defined TC_ARM && defined OBJ_ELF
294 symver_state = saved->symver_state;
300 /* @@ This assumes that \n &c are the same on host and target. This is not
304 process_escape (int ch)
327 /* This function is called to process input characters. The GET
328 parameter is used to retrieve more input characters. GET should
329 set its parameter to point to a buffer, and return the length of
330 the buffer; it should return 0 at end of file. The scrubbed output
331 characters are put into the buffer starting at TOSTART; the TOSTART
332 buffer is TOLEN bytes in length. The function returns the number
333 of scrubbed characters put into TOSTART. This will be TOLEN unless
334 end of file was seen. This function is arranged as a state
335 machine, and saves its state so that it may return at any point.
336 This is the way the old code used to work. */
339 do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen)
342 char *toend = tostart + tolen;
346 register int ch, ch2 = 0;
347 /* Character that started the string we're working on. */
348 static char quotechar;
350 /*State 0: beginning of normal line
351 1: After first whitespace on line (flush more white)
352 2: After first non-white (opcode) on line (keep 1white)
353 3: after second white on line (into operands) (flush white)
354 4: after putting out a .linefile, put out digits
355 5: parsing a string, then go to old-state
356 6: putting out \ escape in a "d string.
359 9: After seeing symbol char in state 3 (keep 1white after symchar)
360 10: After seeing whitespace in state 9 (keep white before symchar)
361 11: After seeing a symbol character in state 0 (eg a label definition)
362 -1: output string in out_string and go to the state in old_state
363 -2: flush text until a '*' '/' is seen, then go to state old_state
365 12: After seeing a dash, looking for a second dash as a start
368 #ifdef DOUBLEBAR_PARALLEL
369 13: After seeing a vertical bar, looking for a second
370 vertical bar as a parallel expression separator.
373 14: After seeing a `(' at state 0, looking for a `)' as
375 15: After seeing a `(' at state 1, looking for a `)' as
379 16: After seeing an 'a' or an 'A' at the start of a symbol
380 17: After seeing an 'f' or an 'F' in state 16
384 /* I added states 9 and 10 because the MIPS ECOFF assembler uses
385 constructs like ``.loc 1 20''. This was turning into ``.loc
386 120''. States 9 and 10 ensure that a space is never dropped in
387 between characters which could appear in an identifier. Ian
388 Taylor, ian@cygnus.com.
390 I added state 11 so that something like "Lfoo add %r25,%r26,%r27" works
391 correctly on the PA (and any other target where colons are optional).
392 Jeff Law, law@cs.utah.edu.
394 I added state 13 so that something like "cmp r1, r2 || trap #1" does not
395 get squashed into "cmp r1,r2||trap#1", with the all important space
396 between the 'trap' and the '#1' being eliminated. nickc@cygnus.com */
398 /* This macro gets the next input character. */
402 ? * (unsigned char *) (from++) \
403 : (saved_input = NULL, \
404 fromlen = (*get) (input_buffer, sizeof input_buffer), \
405 from = input_buffer, \
406 fromend = from + fromlen, \
409 : * (unsigned char *) (from++))))
411 /* This macro pushes a character back on the input stream. */
413 #define UNGET(uch) (*--from = (uch))
415 /* This macro puts a character into the output buffer. If this
416 character fills the output buffer, this macro jumps to the label
417 TOFULL. We use this rather ugly approach because we need to
418 handle two different termination conditions: EOF on the input
419 stream, and a full output buffer. It would be simpler if we
420 always read in the entire input stream before processing it, but
421 I don't want to make such a significant change to the assembler's
433 if (saved_input != NULL)
436 fromend = from + saved_input_len;
440 fromlen = (*get) (input_buffer, sizeof input_buffer);
444 fromend = from + fromlen;
449 /* The cases in this switch end with continue, in order to
450 branch back to the top of this while loop and generate the
451 next output character in the appropriate state. */
456 if (*out_string == '\0')
473 as_warn (_("end of file in comment"));
482 while ((ch = GET ()) == '*')
487 as_warn (_("end of file in comment"));
505 else if (ch >= '0' && ch <= '9')
509 while (ch != EOF && IS_WHITESPACE (ch))
521 while (ch != EOF && ch != '\n')
530 /* We are going to copy everything up to a quote character,
531 with special handling for a backslash. We try to
532 optimize the copying in the simple case without using the
533 GET and PUT macros. */
538 for (s = from; s < fromend; s++)
547 if (len > toend - to)
551 memcpy (to, from, len);
560 as_warn (_("end of file in string; '%c' inserted"), quotechar);
565 else if (ch == quotechar)
570 #ifndef NO_STRING_ESCAPES
577 else if (scrub_m68k_mri && ch == '\n')
579 /* Just quietly terminate the string. This permits lines like
580 bne label loop if we haven't reach end yet. */
596 /* Handle strings broken across lines, by turning '\n' into
605 as_warn (_("end of file in string; '%c' inserted"), quotechar);
630 #ifdef ONLY_STANDARD_ESCAPES
631 as_warn (_("unknown escape '\\%c' in string; ignored"), ch);
638 #ifdef DOUBLEBAR_PARALLEL
644 /* Reset back to state 1 and pretend that we are parsing a
645 line from just after the first white space. */
652 /* We have seen an 'a' at the start of a symbol, look for an 'f'. */
654 if (ch == 'f' || ch == 'F')
665 /* We have seen "af" at the start of a symbol,
666 a ' here is a part of that symbol. */
670 /* Change to avoid warning about unclosed string. */
678 /* OK, we are somewhere in states 0 through 4 or 9 through 11. */
684 if (ch == '(' && (state == 0 || state == 1))
690 else if (state == 14 || state == 15)
708 #if defined TC_ARM && defined OBJ_ELF
709 /* We need to watch out for .symver directives. See the comment later
711 if (symver_state == NULL)
713 if ((state == 0 || state == 1) && ch == symver_pseudo[0])
714 symver_state = symver_pseudo + 1;
718 /* We advance to the next state if we find the right
720 if (ch != '\0' && (*symver_state == ch))
722 else if (*symver_state != '\0')
723 /* We did not get the expected character, or we didn't
724 get a valid terminating character after seeing the
725 entire pseudo-op, so we must go back to the beginning. */
729 /* We've read the entire pseudo-op. If this is the end
730 of the line, go back to the beginning. */
735 #endif /* TC_ARM && OBJ_ELF */
738 /* We want to have pseudo-ops which control whether we are in
739 MRI mode or not. Unfortunately, since m68k MRI mode affects
740 the scrubber, that means that we need a special purpose
742 if (mri_state == NULL)
744 if ((state == 0 || state == 1)
745 && ch == mri_pseudo[0])
746 mri_state = mri_pseudo + 1;
750 /* We advance to the next state if we find the right
751 character, or if we need a space character and we get any
752 whitespace character, or if we need a '0' and we get a
753 '1' (this is so that we only need one state to handle
754 ``.mri 0'' and ``.mri 1''). */
757 || (*mri_state == ' '
758 && lex[ch] == LEX_IS_WHITESPACE)
759 || (*mri_state == '0'
765 else if (*mri_state != '\0'
766 || (lex[ch] != LEX_IS_WHITESPACE
767 && lex[ch] != LEX_IS_NEWLINE))
769 /* We did not get the expected character, or we didn't
770 get a valid terminating character after seeing the
771 entire pseudo-op, so we must go back to the
777 /* We've read the entire pseudo-op. mips_last_ch is
778 either '0' or '1' indicating whether to enter or
780 do_scrub_begin (mri_last_ch == '1');
783 /* We continue handling the character as usual. The
784 main gas reader must also handle the .mri pseudo-op
785 to control expression parsing and the like. */
794 as_warn (_("end of file not at end of a line; newline inserted"));
803 case LEX_IS_WHITESPACE:
808 while (ch != EOF && IS_WHITESPACE (ch));
814 /* Preserve a single whitespace character at the
815 beginning of a line. */
822 #ifdef KEEP_WHITE_AROUND_COLON
823 if (lex[ch] == LEX_IS_COLON)
825 /* Only keep this white if there's no white *after* the
829 if (!IS_WHITESPACE (ch2))
840 || IS_LINE_SEPARATOR (ch)
841 || IS_PARALLEL_SEPARATOR (ch))
845 /* In MRI mode, we keep these spaces. */
853 /* If we're in state 2 or 11, we've seen a non-white
854 character followed by whitespace. If the next character
855 is ':', this is whitespace after a label name which we
856 normally must ignore. In MRI mode, though, spaces are
857 not permitted between the label and the colon. */
858 if ((state == 2 || state == 11)
859 && lex[ch] == LEX_IS_COLON
870 /* We can arrive here if we leave a leading whitespace
871 character at the beginning of a line. */
877 /* Optimize common case by skipping UNGET/GET. */
878 PUT (' '); /* Sp after opco */
887 /* In MRI mode, we keep these spaces. */
892 goto recycle; /* Sp in operands */
897 /* In MRI mode, we keep these spaces. */
903 state = 10; /* Sp after symbol char */
906 if (LABELS_WITHOUT_COLONS || flag_m68k_mri)
910 /* We know that ch is not ':', since we tested that
911 case above. Therefore this is not a label, so it
912 must be the opcode, and we've just seen the
913 whitespace after it. */
917 PUT (' '); /* Sp after label definition. */
924 case LEX_IS_TWOCHAR_COMMENT_1ST:
933 if (ch2 != EOF && IS_NEWLINE (ch2))
936 while (ch2 != EOF && ch2 != '*');
941 if (ch2 == EOF || ch2 == '/')
944 /* This UNGET will ensure that we count newlines
950 as_warn (_("end of file in multiline comment"));
955 #ifdef DOUBLESLASH_LINE_COMMENTS
962 while (ch != EOF && !IS_NEWLINE (ch));
964 as_warn ("end of file in comment; newline inserted");
974 if (state == 9 || state == 10)
980 case LEX_IS_STRINGQUOTE:
984 /* Preserve the whitespace in foo "bar". */
989 /* PUT didn't jump out. We could just break, but we
990 know what will happen, so optimize a bit. */
1003 case LEX_IS_ONECHAR_QUOTE:
1006 /* Preserve the whitespace in foo 'b'. */
1015 as_warn (_("end of file after a one-character quote; \\0 inserted"));
1023 as_warn (_("end of file in escape character"));
1027 ch = process_escape (ch);
1029 sprintf (out_buf, "%d", (int) (unsigned char) ch);
1031 /* None of these 'x constants for us. We want 'x'. */
1032 if ((ch = GET ()) != '\'')
1034 #ifdef REQUIRE_CHAR_CLOSE_QUOTE
1035 as_warn (_("missing close quote; (assumed)"));
1041 if (strlen (out_buf) == 1)
1051 out_string = out_buf;
1052 PUT (*out_string++);
1057 #ifdef KEEP_WHITE_AROUND_COLON
1060 if (state == 9 || state == 10)
1062 else if (state != 3)
1068 case LEX_IS_NEWLINE:
1069 /* Roll out a bunch of newlines from inside comments, etc. */
1077 case LEX_IS_LINE_SEPARATOR:
1082 case LEX_IS_PARALLEL_SEPARATOR:
1088 case LEX_IS_DOUBLEDASH_1ST:
1095 /* Read and skip to end of line. */
1100 while (ch != EOF && ch != '\n');
1103 as_warn (_("end of file in comment; newline inserted"));
1109 #ifdef DOUBLEBAR_PARALLEL
1110 case LEX_IS_DOUBLEBAR_1ST:
1116 /* Handle '||' in two states as invoking PUT twice might
1117 result in the first one jumping out of this loop. We'd
1118 then lose track of the state and one '|' char. */
1123 case LEX_IS_LINE_COMMENT_START:
1124 /* FIXME-someday: The two character comment stuff was badly
1125 thought out. On i386, we want '/' as line comment start
1126 AND we want C style comments. hence this hack. The
1127 whole lexical process should be reworked. xoxorich. */
1143 if (state == 0 || state == 1) /* Only comment at start of line. */
1153 while (ch != EOF && IS_WHITESPACE (ch));
1157 as_warn (_("end of file in comment; newline inserted"));
1162 if (ch < '0' || ch > '9' || state != 0 || startch != '#')
1164 /* Not a cpp line. */
1165 while (ch != EOF && !IS_NEWLINE (ch))
1168 as_warn (_("end of file in comment; newline inserted"));
1173 /* Looks like `# 123 "filename"' from cpp. */
1178 out_string = "\tlinefile ";
1180 out_string = "\t.linefile ";
1181 PUT (*out_string++);
1186 /* All insns end in a char for which LEX_IS_SYMBOL_COMPONENT is true.
1187 Trap is the only short insn that has a first operand that is
1188 neither register nor label.
1189 We must prevent exef0f ||trap #1 to degenerate to exef0f ||trap#1 .
1190 We can't make '#' LEX_IS_SYMBOL_COMPONENT because it is
1191 already LEX_IS_LINE_COMMENT_START. However, it is the
1192 only character in line_comment_chars for d10v, hence we
1193 can recognize it as such. */
1194 /* An alternative approach would be to reset the state to 1 when
1195 we see '||', '<'- or '->', but that seems to be overkill. */
1199 /* We have a line comment character which is not at the
1200 start of a line. If this is also a normal comment
1201 character, fall through. Otherwise treat it as a default
1203 if (strchr (tc_comment_chars, ch) == NULL
1204 && (! scrub_m68k_mri
1205 || (ch != '!' && ch != '*')))
1208 && (ch == '!' || ch == '*' || ch == '#')
1213 case LEX_IS_COMMENT_START:
1214 #if defined TC_ARM && defined OBJ_ELF
1215 /* On the ARM, `@' is the comment character.
1216 Unfortunately this is also a special character in ELF .symver
1217 directives (and .type, though we deal with those another way).
1218 So we check if this line is such a directive, and treat
1219 the character as default if so. This is a hack. */
1220 if ((symver_state != NULL) && (*symver_state == 0))
1223 #ifdef WARN_COMMENTS
1225 as_where (&found_comment_file, &found_comment);
1231 while (ch != EOF && !IS_NEWLINE (ch));
1233 as_warn (_("end of file in comment; newline inserted"));
1238 case LEX_IS_SYMBOL_COMPONENT:
1241 /* This is a symbol character following another symbol
1242 character, with whitespace in between. We skipped
1243 the whitespace earlier, so output it now. */
1251 /* "af'" is a symbol containing '\''. */
1252 if (state == 3 && (ch == 'a' || ch == 'A'))
1257 if (ch == 'f' || ch == 'F')
1266 if (!IS_SYMBOL_COMPONENT (ch))
1277 /* This is a common case. Quickly copy CH and all the
1278 following symbol component or normal characters. */
1280 && mri_state == NULL
1281 #if defined TC_ARM && defined OBJ_ELF
1282 && symver_state == NULL
1289 for (s = from; s < fromend; s++)
1293 ch2 = *(unsigned char *) s;
1296 && type != LEX_IS_SYMBOL_COMPONENT)
1301 /* Handle the last character normally, for
1307 if (len > (toend - to) - 1)
1308 len = (toend - to) - 1;
1313 memcpy (to, from, len);
1325 /* Some relatively `normal' character. */
1328 state = 11; /* Now seeing label definition. */
1330 else if (state == 1)
1332 state = 2; /* Ditto. */
1334 else if (state == 9)
1336 if (!IS_SYMBOL_COMPONENT (ch))
1339 else if (state == 10)
1343 /* Special handling for backslash: a backslash may
1344 be the beginning of a formal parameter (of a
1345 macro) following another symbol character, with
1346 whitespace in between. If that is the case, we
1347 output a space before the parameter. Strictly
1348 speaking, correct handling depends upon what the
1349 macro parameter expands into; if the parameter
1350 expands into something which does not start with
1351 an operand character, then we don't want to keep
1352 the space. We don't have enough information to
1353 make the right choice, so here we are making the
1354 choice which is more likely to be correct. */
1368 /* We have reached the end of the input. */
1369 return to - tostart;
1372 /* The output buffer is full. Save any input we have not yet
1377 saved_input_len = fromend - from;
1382 return to - tostart;