Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* This is the Assembler Pre-Processor |
f7e42eb4 NC |
2 | Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
3 | 1999, 2000 | |
252b5132 RH |
4 | Free Software Foundation, Inc. |
5 | ||
6 | This file is part of GAS, the GNU Assembler. | |
7 | ||
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) | |
11 | any later version. | |
12 | ||
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. | |
17 | ||
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, 59 Temple Place - Suite 330, Boston, MA | |
21 | 02111-1307, USA. */ | |
22 | ||
23 | /* Modified by Allen Wirfs-Brock, Instantiations Inc 2/90 */ | |
24 | /* App, the assembler pre-processor. This pre-processor strips out excess | |
25 | spaces, turns single-quoted characters into a decimal constant, and turns | |
26 | # <number> <filename> <garbage> into a .line <number>\n.file <filename> | |
27 | pair. This needs better error-handling. */ | |
28 | ||
29 | #include <stdio.h> | |
30 | #include "as.h" /* For BAD_CASE() only */ | |
31 | ||
32 | #if (__STDC__ != 1) | |
33 | #ifndef const | |
34 | #define const /* empty */ | |
35 | #endif | |
36 | #endif | |
37 | ||
abd63a32 | 38 | #ifdef TC_M68K |
252b5132 RH |
39 | /* Whether we are scrubbing in m68k MRI mode. This is different from |
40 | flag_m68k_mri, because the two flags will be affected by the .mri | |
41 | pseudo-op at different times. */ | |
42 | static int scrub_m68k_mri; | |
abd63a32 AM |
43 | #else |
44 | #define scrub_m68k_mri 0 | |
45 | #endif | |
252b5132 RH |
46 | |
47 | /* The pseudo-op which switches in and out of MRI mode. See the | |
48 | comment in do_scrub_chars. */ | |
49 | static const char mri_pseudo[] = ".mri 0"; | |
50 | ||
51 | #if defined TC_ARM && defined OBJ_ELF | |
3ee4defc | 52 | /* The pseudo-op for which we need to special-case `@' characters. |
252b5132 RH |
53 | See the comment in do_scrub_chars. */ |
54 | static const char symver_pseudo[] = ".symver"; | |
55 | static const char * symver_state; | |
56 | #endif | |
57 | ||
58 | static char lex[256]; | |
59 | static const char symbol_chars[] = | |
60 | "$._ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; | |
61 | ||
62 | #define LEX_IS_SYMBOL_COMPONENT 1 | |
63 | #define LEX_IS_WHITESPACE 2 | |
64 | #define LEX_IS_LINE_SEPARATOR 3 | |
65 | #define LEX_IS_COMMENT_START 4 | |
66 | #define LEX_IS_LINE_COMMENT_START 5 | |
67 | #define LEX_IS_TWOCHAR_COMMENT_1ST 6 | |
68 | #define LEX_IS_STRINGQUOTE 8 | |
69 | #define LEX_IS_COLON 9 | |
70 | #define LEX_IS_NEWLINE 10 | |
71 | #define LEX_IS_ONECHAR_QUOTE 11 | |
72 | #ifdef TC_V850 | |
73 | #define LEX_IS_DOUBLEDASH_1ST 12 | |
74 | #endif | |
75 | #ifdef TC_M32R | |
f28e8eb3 TW |
76 | #define DOUBLEBAR_PARALLEL |
77 | #endif | |
78 | #ifdef DOUBLEBAR_PARALLEL | |
252b5132 RH |
79 | #define LEX_IS_DOUBLEBAR_1ST 13 |
80 | #endif | |
62f65a7b | 81 | #define LEX_IS_PARALLEL_SEPARATOR 14 |
252b5132 RH |
82 | #define IS_SYMBOL_COMPONENT(c) (lex[c] == LEX_IS_SYMBOL_COMPONENT) |
83 | #define IS_WHITESPACE(c) (lex[c] == LEX_IS_WHITESPACE) | |
84 | #define IS_LINE_SEPARATOR(c) (lex[c] == LEX_IS_LINE_SEPARATOR) | |
62f65a7b | 85 | #define IS_PARALLEL_SEPARATOR(c) (lex[c] == LEX_IS_PARALLEL_SEPARATOR) |
252b5132 RH |
86 | #define IS_COMMENT(c) (lex[c] == LEX_IS_COMMENT_START) |
87 | #define IS_LINE_COMMENT(c) (lex[c] == LEX_IS_LINE_COMMENT_START) | |
88 | #define IS_NEWLINE(c) (lex[c] == LEX_IS_NEWLINE) | |
89 | ||
90 | static int process_escape PARAMS ((int)); | |
91 | ||
92 | /* FIXME-soon: The entire lexer/parser thingy should be | |
93 | built statically at compile time rather than dynamically | |
3ee4defc | 94 | each and every time the assembler is run. xoxorich. */ |
252b5132 | 95 | |
3ee4defc | 96 | void |
252b5132 | 97 | do_scrub_begin (m68k_mri) |
92161534 | 98 | int m68k_mri ATTRIBUTE_UNUSED; |
252b5132 RH |
99 | { |
100 | const char *p; | |
101 | int c; | |
102 | ||
252b5132 RH |
103 | lex[' '] = LEX_IS_WHITESPACE; |
104 | lex['\t'] = LEX_IS_WHITESPACE; | |
105 | lex['\r'] = LEX_IS_WHITESPACE; | |
106 | lex['\n'] = LEX_IS_NEWLINE; | |
252b5132 RH |
107 | lex[':'] = LEX_IS_COLON; |
108 | ||
abd63a32 AM |
109 | #ifdef TC_M68K |
110 | scrub_m68k_mri = m68k_mri; | |
111 | ||
252b5132 | 112 | if (! m68k_mri) |
abd63a32 | 113 | #endif |
252b5132 RH |
114 | { |
115 | lex['"'] = LEX_IS_STRINGQUOTE; | |
116 | ||
5b93d8bb AM |
117 | #if ! defined (TC_HPPA) && ! defined (TC_I370) |
118 | /* I370 uses single-quotes to delimit integer, float constants */ | |
252b5132 RH |
119 | lex['\''] = LEX_IS_ONECHAR_QUOTE; |
120 | #endif | |
121 | ||
122 | #ifdef SINGLE_QUOTE_STRINGS | |
123 | lex['\''] = LEX_IS_STRINGQUOTE; | |
124 | #endif | |
125 | } | |
126 | ||
127 | /* Note: if any other character can be LEX_IS_STRINGQUOTE, the loop | |
128 | in state 5 of do_scrub_chars must be changed. */ | |
129 | ||
130 | /* Note that these override the previous defaults, e.g. if ';' is a | |
131 | comment char, then it isn't a line separator. */ | |
132 | for (p = symbol_chars; *p; ++p) | |
133 | { | |
134 | lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT; | |
135 | } /* declare symbol characters */ | |
136 | ||
137 | for (c = 128; c < 256; ++c) | |
138 | lex[c] = LEX_IS_SYMBOL_COMPONENT; | |
139 | ||
140 | #ifdef tc_symbol_chars | |
141 | /* This macro permits the processor to specify all characters which | |
142 | may appears in an operand. This will prevent the scrubber from | |
143 | discarding meaningful whitespace in certain cases. The i386 | |
144 | backend uses this to support prefixes, which can confuse the | |
145 | scrubber as to whether it is parsing operands or opcodes. */ | |
146 | for (p = tc_symbol_chars; *p; ++p) | |
147 | lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT; | |
148 | #endif | |
149 | ||
150 | /* The m68k backend wants to be able to change comment_chars. */ | |
151 | #ifndef tc_comment_chars | |
152 | #define tc_comment_chars comment_chars | |
153 | #endif | |
154 | for (p = tc_comment_chars; *p; p++) | |
155 | { | |
156 | lex[(unsigned char) *p] = LEX_IS_COMMENT_START; | |
157 | } /* declare comment chars */ | |
158 | ||
159 | for (p = line_comment_chars; *p; p++) | |
160 | { | |
161 | lex[(unsigned char) *p] = LEX_IS_LINE_COMMENT_START; | |
162 | } /* declare line comment chars */ | |
163 | ||
164 | for (p = line_separator_chars; *p; p++) | |
165 | { | |
166 | lex[(unsigned char) *p] = LEX_IS_LINE_SEPARATOR; | |
167 | } /* declare line separators */ | |
168 | ||
62f65a7b DB |
169 | #ifdef tc_parallel_separator_chars |
170 | /* This macro permits the processor to specify all characters which | |
171 | separate parallel insns on the same line. */ | |
172 | for (p = tc_parallel_separator_chars; *p; p++) | |
173 | { | |
174 | lex[(unsigned char) *p] = LEX_IS_PARALLEL_SEPARATOR; | |
175 | } /* declare parallel separators */ | |
176 | #endif | |
177 | ||
252b5132 RH |
178 | /* Only allow slash-star comments if slash is not in use. |
179 | FIXME: This isn't right. We should always permit them. */ | |
180 | if (lex['/'] == 0) | |
181 | { | |
182 | lex['/'] = LEX_IS_TWOCHAR_COMMENT_1ST; | |
183 | } | |
184 | ||
abd63a32 | 185 | #ifdef TC_M68K |
252b5132 RH |
186 | if (m68k_mri) |
187 | { | |
188 | lex['\''] = LEX_IS_STRINGQUOTE; | |
189 | lex[';'] = LEX_IS_COMMENT_START; | |
190 | lex['*'] = LEX_IS_LINE_COMMENT_START; | |
191 | /* The MRI documentation says '!' is LEX_IS_COMMENT_START, but | |
192 | then it can't be used in an expression. */ | |
193 | lex['!'] = LEX_IS_LINE_COMMENT_START; | |
194 | } | |
abd63a32 | 195 | #endif |
252b5132 RH |
196 | |
197 | #ifdef TC_V850 | |
198 | lex['-'] = LEX_IS_DOUBLEDASH_1ST; | |
199 | #endif | |
f28e8eb3 | 200 | #ifdef DOUBLEBAR_PARALLEL |
252b5132 RH |
201 | lex['|'] = LEX_IS_DOUBLEBAR_1ST; |
202 | #endif | |
203 | #ifdef TC_D30V | |
204 | /* must do this is we want VLIW instruction with "->" or "<-" */ | |
205 | lex['-'] = LEX_IS_SYMBOL_COMPONENT; | |
206 | #endif | |
207 | } /* do_scrub_begin() */ | |
208 | ||
209 | /* Saved state of the scrubber */ | |
210 | static int state; | |
211 | static int old_state; | |
212 | static char *out_string; | |
213 | static char out_buf[20]; | |
214 | static int add_newlines; | |
215 | static char *saved_input; | |
216 | static int saved_input_len; | |
2b47531b | 217 | static char input_buffer[32 * 1024]; |
252b5132 RH |
218 | static const char *mri_state; |
219 | static char mri_last_ch; | |
220 | ||
221 | /* Data structure for saving the state of app across #include's. Note that | |
222 | app is called asynchronously to the parsing of the .include's, so our | |
223 | state at the time .include is interpreted is completely unrelated. | |
224 | That's why we have to save it all. */ | |
225 | ||
30a2b4ef KH |
226 | struct app_save { |
227 | int state; | |
228 | int old_state; | |
229 | char * out_string; | |
230 | char out_buf[sizeof (out_buf)]; | |
231 | int add_newlines; | |
232 | char * saved_input; | |
233 | int saved_input_len; | |
abd63a32 | 234 | #ifdef TC_M68K |
30a2b4ef | 235 | int scrub_m68k_mri; |
abd63a32 | 236 | #endif |
30a2b4ef KH |
237 | const char * mri_state; |
238 | char mri_last_ch; | |
252b5132 | 239 | #if defined TC_ARM && defined OBJ_ELF |
30a2b4ef | 240 | const char * symver_state; |
252b5132 | 241 | #endif |
30a2b4ef | 242 | }; |
252b5132 RH |
243 | |
244 | char * | |
245 | app_push () | |
246 | { | |
247 | register struct app_save *saved; | |
248 | ||
249 | saved = (struct app_save *) xmalloc (sizeof (*saved)); | |
250 | saved->state = state; | |
251 | saved->old_state = old_state; | |
252 | saved->out_string = out_string; | |
253 | memcpy (saved->out_buf, out_buf, sizeof (out_buf)); | |
254 | saved->add_newlines = add_newlines; | |
2b47531b ILT |
255 | if (saved_input == NULL) |
256 | saved->saved_input = NULL; | |
257 | else | |
258 | { | |
259 | saved->saved_input = xmalloc (saved_input_len); | |
260 | memcpy (saved->saved_input, saved_input, saved_input_len); | |
261 | saved->saved_input_len = saved_input_len; | |
262 | } | |
abd63a32 | 263 | #ifdef TC_M68K |
252b5132 | 264 | saved->scrub_m68k_mri = scrub_m68k_mri; |
abd63a32 | 265 | #endif |
252b5132 RH |
266 | saved->mri_state = mri_state; |
267 | saved->mri_last_ch = mri_last_ch; | |
268 | #if defined TC_ARM && defined OBJ_ELF | |
269 | saved->symver_state = symver_state; | |
270 | #endif | |
271 | ||
3ee4defc | 272 | /* do_scrub_begin() is not useful, just wastes time. */ |
252b5132 RH |
273 | |
274 | state = 0; | |
275 | saved_input = NULL; | |
276 | ||
277 | return (char *) saved; | |
278 | } | |
279 | ||
3ee4defc | 280 | void |
252b5132 RH |
281 | app_pop (arg) |
282 | char *arg; | |
283 | { | |
284 | register struct app_save *saved = (struct app_save *) arg; | |
285 | ||
3ee4defc | 286 | /* There is no do_scrub_end (). */ |
252b5132 RH |
287 | state = saved->state; |
288 | old_state = saved->old_state; | |
289 | out_string = saved->out_string; | |
290 | memcpy (out_buf, saved->out_buf, sizeof (out_buf)); | |
291 | add_newlines = saved->add_newlines; | |
2b47531b ILT |
292 | if (saved->saved_input == NULL) |
293 | saved_input = NULL; | |
294 | else | |
295 | { | |
ab9da554 | 296 | assert (saved->saved_input_len <= (int) (sizeof input_buffer)); |
2b47531b ILT |
297 | memcpy (input_buffer, saved->saved_input, saved->saved_input_len); |
298 | saved_input = input_buffer; | |
299 | saved_input_len = saved->saved_input_len; | |
300 | free (saved->saved_input); | |
301 | } | |
abd63a32 | 302 | #ifdef TC_M68K |
252b5132 | 303 | scrub_m68k_mri = saved->scrub_m68k_mri; |
abd63a32 | 304 | #endif |
252b5132 RH |
305 | mri_state = saved->mri_state; |
306 | mri_last_ch = saved->mri_last_ch; | |
307 | #if defined TC_ARM && defined OBJ_ELF | |
308 | symver_state = saved->symver_state; | |
309 | #endif | |
310 | ||
311 | free (arg); | |
312 | } /* app_pop() */ | |
313 | ||
314 | /* @@ This assumes that \n &c are the same on host and target. This is not | |
315 | necessarily true. */ | |
3ee4defc | 316 | static int |
252b5132 RH |
317 | process_escape (ch) |
318 | int ch; | |
319 | { | |
320 | switch (ch) | |
321 | { | |
322 | case 'b': | |
323 | return '\b'; | |
324 | case 'f': | |
325 | return '\f'; | |
326 | case 'n': | |
327 | return '\n'; | |
328 | case 'r': | |
329 | return '\r'; | |
330 | case 't': | |
331 | return '\t'; | |
332 | case '\'': | |
333 | return '\''; | |
334 | case '"': | |
335 | return '\"'; | |
336 | default: | |
337 | return ch; | |
338 | } | |
339 | } | |
340 | ||
341 | /* This function is called to process input characters. The GET | |
342 | parameter is used to retrieve more input characters. GET should | |
343 | set its parameter to point to a buffer, and return the length of | |
344 | the buffer; it should return 0 at end of file. The scrubbed output | |
345 | characters are put into the buffer starting at TOSTART; the TOSTART | |
346 | buffer is TOLEN bytes in length. The function returns the number | |
347 | of scrubbed characters put into TOSTART. This will be TOLEN unless | |
348 | end of file was seen. This function is arranged as a state | |
349 | machine, and saves its state so that it may return at any point. | |
350 | This is the way the old code used to work. */ | |
351 | ||
352 | int | |
353 | do_scrub_chars (get, tostart, tolen) | |
2b47531b | 354 | int (*get) PARAMS ((char *, int)); |
252b5132 RH |
355 | char *tostart; |
356 | int tolen; | |
357 | { | |
358 | char *to = tostart; | |
359 | char *toend = tostart + tolen; | |
360 | char *from; | |
361 | char *fromend; | |
362 | int fromlen; | |
363 | register int ch, ch2 = 0; | |
364 | ||
365 | /*State 0: beginning of normal line | |
366 | 1: After first whitespace on line (flush more white) | |
367 | 2: After first non-white (opcode) on line (keep 1white) | |
368 | 3: after second white on line (into operands) (flush white) | |
369 | 4: after putting out a .line, put out digits | |
370 | 5: parsing a string, then go to old-state | |
371 | 6: putting out \ escape in a "d string. | |
372 | 7: After putting out a .appfile, put out string. | |
373 | 8: After putting out a .appfile string, flush until newline. | |
374 | 9: After seeing symbol char in state 3 (keep 1white after symchar) | |
375 | 10: After seeing whitespace in state 9 (keep white before symchar) | |
376 | 11: After seeing a symbol character in state 0 (eg a label definition) | |
377 | -1: output string in out_string and go to the state in old_state | |
378 | -2: flush text until a '*' '/' is seen, then go to state old_state | |
379 | #ifdef TC_V850 | |
380 | 12: After seeing a dash, looking for a second dash as a start of comment. | |
381 | #endif | |
f28e8eb3 | 382 | #ifdef DOUBLEBAR_PARALLEL |
252b5132 RH |
383 | 13: After seeing a vertical bar, looking for a second vertical bar as a parallel expression seperator. |
384 | #endif | |
385 | */ | |
386 | ||
387 | /* I added states 9 and 10 because the MIPS ECOFF assembler uses | |
388 | constructs like ``.loc 1 20''. This was turning into ``.loc | |
389 | 120''. States 9 and 10 ensure that a space is never dropped in | |
3b37fd66 | 390 | between characters which could appear in an identifier. Ian |
252b5132 RH |
391 | Taylor, ian@cygnus.com. |
392 | ||
393 | I added state 11 so that something like "Lfoo add %r25,%r26,%r27" works | |
394 | correctly on the PA (and any other target where colons are optional). | |
395 | Jeff Law, law@cs.utah.edu. | |
396 | ||
397 | I added state 13 so that something like "cmp r1, r2 || trap #1" does not | |
398 | get squashed into "cmp r1,r2||trap#1", with the all important space | |
399 | between the 'trap' and the '#1' being eliminated. nickc@cygnus.com */ | |
400 | ||
401 | /* This macro gets the next input character. */ | |
402 | ||
2b47531b ILT |
403 | #define GET() \ |
404 | (from < fromend \ | |
405 | ? * (unsigned char *) (from++) \ | |
406 | : (saved_input = NULL, \ | |
407 | fromlen = (*get) (input_buffer, sizeof input_buffer), \ | |
408 | from = input_buffer, \ | |
409 | fromend = from + fromlen, \ | |
410 | (fromlen == 0 \ | |
411 | ? EOF \ | |
252b5132 RH |
412 | : * (unsigned char *) (from++)))) |
413 | ||
414 | /* This macro pushes a character back on the input stream. */ | |
415 | ||
416 | #define UNGET(uch) (*--from = (uch)) | |
417 | ||
418 | /* This macro puts a character into the output buffer. If this | |
419 | character fills the output buffer, this macro jumps to the label | |
420 | TOFULL. We use this rather ugly approach because we need to | |
421 | handle two different termination conditions: EOF on the input | |
422 | stream, and a full output buffer. It would be simpler if we | |
423 | always read in the entire input stream before processing it, but | |
424 | I don't want to make such a significant change to the assembler's | |
425 | memory usage. */ | |
426 | ||
427 | #define PUT(pch) \ | |
428 | do \ | |
429 | { \ | |
430 | *to++ = (pch); \ | |
431 | if (to >= toend) \ | |
432 | goto tofull; \ | |
433 | } \ | |
434 | while (0) | |
435 | ||
436 | if (saved_input != NULL) | |
437 | { | |
438 | from = saved_input; | |
439 | fromend = from + saved_input_len; | |
440 | } | |
441 | else | |
442 | { | |
2b47531b | 443 | fromlen = (*get) (input_buffer, sizeof input_buffer); |
252b5132 RH |
444 | if (fromlen == 0) |
445 | return 0; | |
2b47531b | 446 | from = input_buffer; |
252b5132 RH |
447 | fromend = from + fromlen; |
448 | } | |
449 | ||
450 | while (1) | |
451 | { | |
452 | /* The cases in this switch end with continue, in order to | |
453 | branch back to the top of this while loop and generate the | |
454 | next output character in the appropriate state. */ | |
455 | switch (state) | |
456 | { | |
457 | case -1: | |
458 | ch = *out_string++; | |
459 | if (*out_string == '\0') | |
460 | { | |
461 | state = old_state; | |
462 | old_state = 3; | |
463 | } | |
464 | PUT (ch); | |
465 | continue; | |
466 | ||
467 | case -2: | |
468 | for (;;) | |
469 | { | |
470 | do | |
471 | { | |
472 | ch = GET (); | |
473 | ||
474 | if (ch == EOF) | |
475 | { | |
476 | as_warn (_("end of file in comment")); | |
477 | goto fromeof; | |
478 | } | |
479 | ||
480 | if (ch == '\n') | |
481 | PUT ('\n'); | |
482 | } | |
483 | while (ch != '*'); | |
484 | ||
485 | while ((ch = GET ()) == '*') | |
486 | ; | |
487 | ||
488 | if (ch == EOF) | |
489 | { | |
490 | as_warn (_("end of file in comment")); | |
491 | goto fromeof; | |
492 | } | |
493 | ||
494 | if (ch == '/') | |
495 | break; | |
496 | ||
497 | UNGET (ch); | |
498 | } | |
499 | ||
500 | state = old_state; | |
501 | UNGET (' '); | |
502 | continue; | |
503 | ||
504 | case 4: | |
505 | ch = GET (); | |
506 | if (ch == EOF) | |
507 | goto fromeof; | |
508 | else if (ch >= '0' && ch <= '9') | |
509 | PUT (ch); | |
510 | else | |
511 | { | |
512 | while (ch != EOF && IS_WHITESPACE (ch)) | |
513 | ch = GET (); | |
514 | if (ch == '"') | |
515 | { | |
516 | UNGET (ch); | |
517 | if (scrub_m68k_mri) | |
518 | out_string = "\n\tappfile "; | |
519 | else | |
520 | out_string = "\n\t.appfile "; | |
521 | old_state = 7; | |
522 | state = -1; | |
523 | PUT (*out_string++); | |
524 | } | |
525 | else | |
526 | { | |
527 | while (ch != EOF && ch != '\n') | |
528 | ch = GET (); | |
529 | state = 0; | |
530 | PUT (ch); | |
531 | } | |
532 | } | |
533 | continue; | |
534 | ||
535 | case 5: | |
536 | /* We are going to copy everything up to a quote character, | |
537 | with special handling for a backslash. We try to | |
538 | optimize the copying in the simple case without using the | |
539 | GET and PUT macros. */ | |
540 | { | |
541 | char *s; | |
542 | int len; | |
543 | ||
544 | for (s = from; s < fromend; s++) | |
545 | { | |
546 | ch = *s; | |
547 | /* This condition must be changed if the type of any | |
548 | other character can be LEX_IS_STRINGQUOTE. */ | |
549 | if (ch == '\\' | |
550 | || ch == '"' | |
551 | || ch == '\'' | |
552 | || ch == '\n') | |
553 | break; | |
554 | } | |
555 | len = s - from; | |
556 | if (len > toend - to) | |
557 | len = toend - to; | |
558 | if (len > 0) | |
559 | { | |
560 | memcpy (to, from, len); | |
561 | to += len; | |
562 | from += len; | |
563 | } | |
564 | } | |
565 | ||
566 | ch = GET (); | |
567 | if (ch == EOF) | |
568 | { | |
0e389e77 | 569 | as_warn (_("end of file in string; inserted '\"'")); |
252b5132 RH |
570 | state = old_state; |
571 | UNGET ('\n'); | |
572 | PUT ('"'); | |
573 | } | |
574 | else if (lex[ch] == LEX_IS_STRINGQUOTE) | |
575 | { | |
576 | state = old_state; | |
577 | PUT (ch); | |
578 | } | |
579 | #ifndef NO_STRING_ESCAPES | |
580 | else if (ch == '\\') | |
581 | { | |
582 | state = 6; | |
583 | PUT (ch); | |
584 | } | |
585 | #endif | |
586 | else if (scrub_m68k_mri && ch == '\n') | |
587 | { | |
588 | /* Just quietly terminate the string. This permits lines like | |
589 | bne label loop if we haven't reach end yet | |
590 | */ | |
591 | state = old_state; | |
592 | UNGET (ch); | |
593 | PUT ('\''); | |
594 | } | |
595 | else | |
596 | { | |
597 | PUT (ch); | |
598 | } | |
599 | continue; | |
600 | ||
601 | case 6: | |
602 | state = 5; | |
603 | ch = GET (); | |
604 | switch (ch) | |
605 | { | |
606 | /* Handle strings broken across lines, by turning '\n' into | |
607 | '\\' and 'n'. */ | |
608 | case '\n': | |
609 | UNGET ('n'); | |
610 | add_newlines++; | |
611 | PUT ('\\'); | |
612 | continue; | |
613 | ||
614 | case '"': | |
615 | case '\\': | |
616 | case 'b': | |
617 | case 'f': | |
618 | case 'n': | |
619 | case 'r': | |
620 | case 't': | |
621 | case 'v': | |
622 | case 'x': | |
623 | case 'X': | |
624 | case '0': | |
625 | case '1': | |
626 | case '2': | |
627 | case '3': | |
628 | case '4': | |
629 | case '5': | |
630 | case '6': | |
631 | case '7': | |
632 | break; | |
633 | #if defined(IGNORE_NONSTANDARD_ESCAPES) | defined(ONLY_STANDARD_ESCAPES) | |
634 | default: | |
0e389e77 | 635 | as_warn (_("unknown escape '\\%c' in string; ignored"), ch); |
252b5132 RH |
636 | break; |
637 | #else /* ONLY_STANDARD_ESCAPES */ | |
638 | default: | |
639 | /* Accept \x as x for any x */ | |
640 | break; | |
641 | #endif /* ONLY_STANDARD_ESCAPES */ | |
642 | ||
643 | case EOF: | |
0e389e77 | 644 | as_warn (_("end of file in string; '\"' inserted")); |
252b5132 RH |
645 | PUT ('"'); |
646 | continue; | |
647 | } | |
648 | PUT (ch); | |
649 | continue; | |
650 | ||
651 | case 7: | |
652 | ch = GET (); | |
653 | state = 5; | |
654 | old_state = 8; | |
655 | if (ch == EOF) | |
656 | goto fromeof; | |
657 | PUT (ch); | |
658 | continue; | |
659 | ||
660 | case 8: | |
661 | do | |
662 | ch = GET (); | |
663 | while (ch != '\n' && ch != EOF); | |
664 | if (ch == EOF) | |
665 | goto fromeof; | |
666 | state = 0; | |
667 | PUT (ch); | |
668 | continue; | |
669 | } | |
670 | ||
671 | /* OK, we are somewhere in states 0 through 4 or 9 through 11 */ | |
672 | ||
673 | /* flushchar: */ | |
674 | ch = GET (); | |
675 | ||
676 | recycle: | |
677 | ||
678 | #if defined TC_ARM && defined OBJ_ELF | |
679 | /* We need to watch out for .symver directives. See the comment later | |
680 | in this function. */ | |
681 | if (symver_state == NULL) | |
682 | { | |
683 | if ((state == 0 || state == 1) && ch == symver_pseudo[0]) | |
684 | symver_state = symver_pseudo + 1; | |
685 | } | |
686 | else | |
687 | { | |
688 | /* We advance to the next state if we find the right | |
689 | character. */ | |
690 | if (ch != '\0' && (*symver_state == ch)) | |
691 | ++symver_state; | |
692 | else if (*symver_state != '\0') | |
693 | /* We did not get the expected character, or we didn't | |
694 | get a valid terminating character after seeing the | |
695 | entire pseudo-op, so we must go back to the beginning. */ | |
696 | symver_state = NULL; | |
697 | else | |
698 | { | |
699 | /* We've read the entire pseudo-op. If this is the end | |
700 | of the line, go back to the beginning. */ | |
701 | if (IS_NEWLINE (ch)) | |
702 | symver_state = NULL; | |
703 | } | |
704 | } | |
705 | #endif /* TC_ARM && OBJ_ELF */ | |
706 | ||
707 | #ifdef TC_M68K | |
708 | /* We want to have pseudo-ops which control whether we are in | |
709 | MRI mode or not. Unfortunately, since m68k MRI mode affects | |
710 | the scrubber, that means that we need a special purpose | |
711 | recognizer here. */ | |
712 | if (mri_state == NULL) | |
713 | { | |
714 | if ((state == 0 || state == 1) | |
715 | && ch == mri_pseudo[0]) | |
716 | mri_state = mri_pseudo + 1; | |
717 | } | |
718 | else | |
719 | { | |
720 | /* We advance to the next state if we find the right | |
721 | character, or if we need a space character and we get any | |
722 | whitespace character, or if we need a '0' and we get a | |
723 | '1' (this is so that we only need one state to handle | |
724 | ``.mri 0'' and ``.mri 1''). */ | |
725 | if (ch != '\0' | |
726 | && (*mri_state == ch | |
727 | || (*mri_state == ' ' | |
728 | && lex[ch] == LEX_IS_WHITESPACE) | |
729 | || (*mri_state == '0' | |
730 | && ch == '1'))) | |
731 | { | |
732 | mri_last_ch = ch; | |
733 | ++mri_state; | |
734 | } | |
735 | else if (*mri_state != '\0' | |
736 | || (lex[ch] != LEX_IS_WHITESPACE | |
737 | && lex[ch] != LEX_IS_NEWLINE)) | |
738 | { | |
739 | /* We did not get the expected character, or we didn't | |
740 | get a valid terminating character after seeing the | |
741 | entire pseudo-op, so we must go back to the | |
742 | beginning. */ | |
743 | mri_state = NULL; | |
744 | } | |
745 | else | |
746 | { | |
747 | /* We've read the entire pseudo-op. mips_last_ch is | |
748 | either '0' or '1' indicating whether to enter or | |
749 | leave MRI mode. */ | |
750 | do_scrub_begin (mri_last_ch == '1'); | |
751 | mri_state = NULL; | |
752 | ||
753 | /* We continue handling the character as usual. The | |
754 | main gas reader must also handle the .mri pseudo-op | |
755 | to control expression parsing and the like. */ | |
756 | } | |
757 | } | |
758 | #endif | |
759 | ||
760 | if (ch == EOF) | |
761 | { | |
762 | if (state != 0) | |
763 | { | |
764 | as_warn (_("end of file not at end of a line; newline inserted")); | |
765 | state = 0; | |
766 | PUT ('\n'); | |
767 | } | |
768 | goto fromeof; | |
769 | } | |
770 | ||
771 | switch (lex[ch]) | |
772 | { | |
773 | case LEX_IS_WHITESPACE: | |
774 | do | |
775 | { | |
776 | ch = GET (); | |
777 | } | |
778 | while (ch != EOF && IS_WHITESPACE (ch)); | |
779 | if (ch == EOF) | |
780 | goto fromeof; | |
781 | ||
782 | if (state == 0) | |
783 | { | |
784 | /* Preserve a single whitespace character at the | |
785 | beginning of a line. */ | |
786 | state = 1; | |
787 | UNGET (ch); | |
788 | PUT (' '); | |
789 | break; | |
790 | } | |
791 | ||
f28e8eb3 | 792 | #ifdef KEEP_WHITE_AROUND_COLON |
30a2b4ef KH |
793 | if (lex[ch] == LEX_IS_COLON) |
794 | { | |
795 | /* Only keep this white if there's no white *after* the | |
796 | colon. */ | |
797 | ch2 = GET (); | |
798 | UNGET (ch2); | |
799 | if (!IS_WHITESPACE (ch2)) | |
800 | { | |
801 | state = 9; | |
802 | UNGET (ch); | |
803 | PUT (' '); | |
804 | break; | |
805 | } | |
806 | } | |
f28e8eb3 | 807 | #endif |
252b5132 RH |
808 | if (IS_COMMENT (ch) |
809 | || ch == '/' | |
62f65a7b DB |
810 | || IS_LINE_SEPARATOR (ch) |
811 | || IS_PARALLEL_SEPARATOR (ch)) | |
252b5132 RH |
812 | { |
813 | if (scrub_m68k_mri) | |
814 | { | |
815 | /* In MRI mode, we keep these spaces. */ | |
816 | UNGET (ch); | |
817 | PUT (' '); | |
818 | break; | |
819 | } | |
820 | goto recycle; | |
821 | } | |
822 | ||
823 | /* If we're in state 2 or 11, we've seen a non-white | |
824 | character followed by whitespace. If the next character | |
825 | is ':', this is whitespace after a label name which we | |
826 | normally must ignore. In MRI mode, though, spaces are | |
827 | not permitted between the label and the colon. */ | |
828 | if ((state == 2 || state == 11) | |
829 | && lex[ch] == LEX_IS_COLON | |
830 | && ! scrub_m68k_mri) | |
831 | { | |
832 | state = 1; | |
833 | PUT (ch); | |
834 | break; | |
835 | } | |
836 | ||
837 | switch (state) | |
838 | { | |
839 | case 0: | |
840 | state++; | |
841 | goto recycle; /* Punted leading sp */ | |
842 | case 1: | |
843 | /* We can arrive here if we leave a leading whitespace | |
844 | character at the beginning of a line. */ | |
845 | goto recycle; | |
846 | case 2: | |
847 | state = 3; | |
848 | if (to + 1 < toend) | |
849 | { | |
850 | /* Optimize common case by skipping UNGET/GET. */ | |
851 | PUT (' '); /* Sp after opco */ | |
852 | goto recycle; | |
853 | } | |
854 | UNGET (ch); | |
855 | PUT (' '); | |
856 | break; | |
857 | case 3: | |
858 | if (scrub_m68k_mri) | |
859 | { | |
860 | /* In MRI mode, we keep these spaces. */ | |
861 | UNGET (ch); | |
862 | PUT (' '); | |
863 | break; | |
864 | } | |
865 | goto recycle; /* Sp in operands */ | |
866 | case 9: | |
867 | case 10: | |
868 | if (scrub_m68k_mri) | |
869 | { | |
870 | /* In MRI mode, we keep these spaces. */ | |
871 | state = 3; | |
872 | UNGET (ch); | |
873 | PUT (' '); | |
874 | break; | |
875 | } | |
876 | state = 10; /* Sp after symbol char */ | |
877 | goto recycle; | |
878 | case 11: | |
abd63a32 | 879 | if (LABELS_WITHOUT_COLONS || flag_m68k_mri) |
252b5132 RH |
880 | state = 1; |
881 | else | |
882 | { | |
883 | /* We know that ch is not ':', since we tested that | |
884 | case above. Therefore this is not a label, so it | |
885 | must be the opcode, and we've just seen the | |
886 | whitespace after it. */ | |
887 | state = 3; | |
888 | } | |
889 | UNGET (ch); | |
890 | PUT (' '); /* Sp after label definition. */ | |
891 | break; | |
892 | default: | |
893 | BAD_CASE (state); | |
894 | } | |
895 | break; | |
896 | ||
897 | case LEX_IS_TWOCHAR_COMMENT_1ST: | |
898 | ch2 = GET (); | |
899 | if (ch2 == '*') | |
900 | { | |
901 | for (;;) | |
902 | { | |
903 | do | |
904 | { | |
905 | ch2 = GET (); | |
906 | if (ch2 != EOF && IS_NEWLINE (ch2)) | |
907 | add_newlines++; | |
908 | } | |
909 | while (ch2 != EOF && ch2 != '*'); | |
910 | ||
911 | while (ch2 == '*') | |
912 | ch2 = GET (); | |
913 | ||
914 | if (ch2 == EOF || ch2 == '/') | |
915 | break; | |
916 | ||
917 | /* This UNGET will ensure that we count newlines | |
918 | correctly. */ | |
919 | UNGET (ch2); | |
920 | } | |
921 | ||
922 | if (ch2 == EOF) | |
923 | as_warn (_("end of file in multiline comment")); | |
924 | ||
925 | ch = ' '; | |
926 | goto recycle; | |
927 | } | |
800eeca4 JW |
928 | #ifdef DOUBLESLASH_LINE_COMMENTS |
929 | else if (ch2 == '/') | |
930 | { | |
931 | do | |
932 | { | |
933 | ch = GET (); | |
934 | } | |
935 | while (ch != EOF && !IS_NEWLINE (ch)); | |
936 | if (ch == EOF) | |
937 | as_warn ("end of file in comment; newline inserted"); | |
938 | state = 0; | |
939 | PUT ('\n'); | |
940 | break; | |
941 | } | |
942 | #endif | |
252b5132 RH |
943 | else |
944 | { | |
945 | if (ch2 != EOF) | |
946 | UNGET (ch2); | |
947 | if (state == 9 || state == 10) | |
948 | state = 3; | |
949 | PUT (ch); | |
950 | } | |
951 | break; | |
952 | ||
953 | case LEX_IS_STRINGQUOTE: | |
954 | if (state == 10) | |
955 | { | |
956 | /* Preserve the whitespace in foo "bar" */ | |
957 | UNGET (ch); | |
958 | state = 3; | |
959 | PUT (' '); | |
960 | ||
961 | /* PUT didn't jump out. We could just break, but we | |
962 | know what will happen, so optimize a bit. */ | |
963 | ch = GET (); | |
964 | old_state = 3; | |
965 | } | |
966 | else if (state == 9) | |
967 | old_state = 3; | |
968 | else | |
969 | old_state = state; | |
970 | state = 5; | |
971 | PUT (ch); | |
972 | break; | |
973 | ||
974 | #ifndef IEEE_STYLE | |
975 | case LEX_IS_ONECHAR_QUOTE: | |
976 | if (state == 10) | |
977 | { | |
978 | /* Preserve the whitespace in foo 'b' */ | |
979 | UNGET (ch); | |
980 | state = 3; | |
981 | PUT (' '); | |
982 | break; | |
983 | } | |
984 | ch = GET (); | |
985 | if (ch == EOF) | |
986 | { | |
987 | as_warn (_("end of file after a one-character quote; \\0 inserted")); | |
988 | ch = 0; | |
989 | } | |
990 | if (ch == '\\') | |
991 | { | |
992 | ch = GET (); | |
993 | if (ch == EOF) | |
994 | { | |
995 | as_warn (_("end of file in escape character")); | |
996 | ch = '\\'; | |
997 | } | |
998 | else | |
999 | ch = process_escape (ch); | |
1000 | } | |
1001 | sprintf (out_buf, "%d", (int) (unsigned char) ch); | |
1002 | ||
1003 | /* None of these 'x constants for us. We want 'x'. */ | |
1004 | if ((ch = GET ()) != '\'') | |
1005 | { | |
1006 | #ifdef REQUIRE_CHAR_CLOSE_QUOTE | |
0e389e77 | 1007 | as_warn (_("missing close quote; (assumed)")); |
252b5132 RH |
1008 | #else |
1009 | if (ch != EOF) | |
1010 | UNGET (ch); | |
1011 | #endif | |
1012 | } | |
1013 | if (strlen (out_buf) == 1) | |
1014 | { | |
1015 | PUT (out_buf[0]); | |
1016 | break; | |
1017 | } | |
1018 | if (state == 9) | |
1019 | old_state = 3; | |
1020 | else | |
1021 | old_state = state; | |
1022 | state = -1; | |
1023 | out_string = out_buf; | |
1024 | PUT (*out_string++); | |
1025 | break; | |
1026 | #endif | |
1027 | ||
1028 | case LEX_IS_COLON: | |
f28e8eb3 | 1029 | #ifdef KEEP_WHITE_AROUND_COLON |
30a2b4ef | 1030 | state = 9; |
f28e8eb3 | 1031 | #else |
252b5132 RH |
1032 | if (state == 9 || state == 10) |
1033 | state = 3; | |
1034 | else if (state != 3) | |
1035 | state = 1; | |
f28e8eb3 | 1036 | #endif |
252b5132 RH |
1037 | PUT (ch); |
1038 | break; | |
1039 | ||
1040 | case LEX_IS_NEWLINE: | |
1041 | /* Roll out a bunch of newlines from inside comments, etc. */ | |
1042 | if (add_newlines) | |
1043 | { | |
1044 | --add_newlines; | |
1045 | UNGET (ch); | |
1046 | } | |
3ee4defc | 1047 | /* Fall through. */ |
252b5132 RH |
1048 | |
1049 | case LEX_IS_LINE_SEPARATOR: | |
1050 | state = 0; | |
1051 | PUT (ch); | |
1052 | break; | |
1053 | ||
62f65a7b DB |
1054 | case LEX_IS_PARALLEL_SEPARATOR: |
1055 | state = 1; | |
1056 | PUT (ch); | |
1057 | break; | |
1058 | ||
252b5132 RH |
1059 | #ifdef TC_V850 |
1060 | case LEX_IS_DOUBLEDASH_1ST: | |
30a2b4ef | 1061 | ch2 = GET (); |
252b5132 RH |
1062 | if (ch2 != '-') |
1063 | { | |
1064 | UNGET (ch2); | |
1065 | goto de_fault; | |
1066 | } | |
3ee4defc | 1067 | /* Read and skip to end of line. */ |
252b5132 RH |
1068 | do |
1069 | { | |
1070 | ch = GET (); | |
1071 | } | |
1072 | while (ch != EOF && ch != '\n'); | |
1073 | if (ch == EOF) | |
1074 | { | |
1075 | as_warn (_("end of file in comment; newline inserted")); | |
1076 | } | |
1077 | state = 0; | |
1078 | PUT ('\n'); | |
1079 | break; | |
3ee4defc | 1080 | #endif |
f28e8eb3 | 1081 | #ifdef DOUBLEBAR_PARALLEL |
252b5132 | 1082 | case LEX_IS_DOUBLEBAR_1ST: |
30a2b4ef | 1083 | ch2 = GET (); |
252b5132 RH |
1084 | if (ch2 != '|') |
1085 | { | |
1086 | UNGET (ch2); | |
1087 | goto de_fault; | |
1088 | } | |
1089 | /* Reset back to state 1 and pretend that we are parsing a line from | |
1090 | just after the first white space. */ | |
1091 | state = 1; | |
1092 | PUT ('|'); | |
1093 | PUT ('|'); | |
1094 | break; | |
3ee4defc | 1095 | #endif |
252b5132 RH |
1096 | case LEX_IS_LINE_COMMENT_START: |
1097 | /* FIXME-someday: The two character comment stuff was badly | |
1098 | thought out. On i386, we want '/' as line comment start | |
1099 | AND we want C style comments. hence this hack. The | |
1100 | whole lexical process should be reworked. xoxorich. */ | |
1101 | if (ch == '/') | |
1102 | { | |
1103 | ch2 = GET (); | |
1104 | if (ch2 == '*') | |
1105 | { | |
1106 | old_state = 3; | |
1107 | state = -2; | |
1108 | break; | |
1109 | } | |
1110 | else | |
1111 | { | |
1112 | UNGET (ch2); | |
1113 | } | |
1114 | } /* bad hack */ | |
1115 | ||
1116 | if (state == 0 || state == 1) /* Only comment at start of line. */ | |
1117 | { | |
1118 | int startch; | |
1119 | ||
1120 | startch = ch; | |
1121 | ||
1122 | do | |
1123 | { | |
1124 | ch = GET (); | |
1125 | } | |
1126 | while (ch != EOF && IS_WHITESPACE (ch)); | |
1127 | if (ch == EOF) | |
1128 | { | |
1129 | as_warn (_("end of file in comment; newline inserted")); | |
1130 | PUT ('\n'); | |
1131 | break; | |
1132 | } | |
1133 | if (ch < '0' || ch > '9' || state != 0 || startch != '#') | |
1134 | { | |
1135 | /* Not a cpp line. */ | |
1136 | while (ch != EOF && !IS_NEWLINE (ch)) | |
1137 | ch = GET (); | |
1138 | if (ch == EOF) | |
0e389e77 | 1139 | as_warn (_("end of file in comment; newline inserted")); |
252b5132 RH |
1140 | state = 0; |
1141 | PUT ('\n'); | |
1142 | break; | |
1143 | } | |
3ee4defc | 1144 | /* Looks like `# 123 "filename"' from cpp. */ |
252b5132 RH |
1145 | UNGET (ch); |
1146 | old_state = 4; | |
1147 | state = -1; | |
1148 | if (scrub_m68k_mri) | |
1149 | out_string = "\tappline "; | |
1150 | else | |
1151 | out_string = "\t.appline "; | |
1152 | PUT (*out_string++); | |
1153 | break; | |
1154 | } | |
1155 | ||
1156 | #ifdef TC_D10V | |
1157 | /* All insns end in a char for which LEX_IS_SYMBOL_COMPONENT is true. | |
1158 | Trap is the only short insn that has a first operand that is | |
1159 | neither register nor label. | |
1160 | We must prevent exef0f ||trap #1 to degenerate to exef0f ||trap#1 . | |
30a2b4ef KH |
1161 | We can't make '#' LEX_IS_SYMBOL_COMPONENT because it is |
1162 | already LEX_IS_LINE_COMMENT_START. However, it is the | |
1163 | only character in line_comment_chars for d10v, hence we | |
1164 | can recognize it as such. */ | |
252b5132 RH |
1165 | /* An alternative approach would be to reset the state to 1 when |
1166 | we see '||', '<'- or '->', but that seems to be overkill. */ | |
30a2b4ef KH |
1167 | if (state == 10) |
1168 | PUT (' '); | |
252b5132 RH |
1169 | #endif |
1170 | /* We have a line comment character which is not at the | |
1171 | start of a line. If this is also a normal comment | |
1172 | character, fall through. Otherwise treat it as a default | |
1173 | character. */ | |
1174 | if (strchr (tc_comment_chars, ch) == NULL | |
1175 | && (! scrub_m68k_mri | |
1176 | || (ch != '!' && ch != '*'))) | |
1177 | goto de_fault; | |
1178 | if (scrub_m68k_mri | |
1179 | && (ch == '!' || ch == '*' || ch == '#') | |
1180 | && state != 1 | |
1181 | && state != 10) | |
1182 | goto de_fault; | |
1183 | /* Fall through. */ | |
1184 | case LEX_IS_COMMENT_START: | |
1185 | #if defined TC_ARM && defined OBJ_ELF | |
1186 | /* On the ARM, `@' is the comment character. | |
1187 | Unfortunately this is also a special character in ELF .symver | |
30a2b4ef KH |
1188 | directives (and .type, though we deal with those another way). |
1189 | So we check if this line is such a directive, and treat | |
1190 | the character as default if so. This is a hack. */ | |
252b5132 RH |
1191 | if ((symver_state != NULL) && (*symver_state == 0)) |
1192 | goto de_fault; | |
4c400d5e AM |
1193 | #endif |
1194 | #ifdef WARN_COMMENTS | |
1195 | if (!found_comment) | |
1196 | as_where (&found_comment_file, &found_comment); | |
252b5132 RH |
1197 | #endif |
1198 | do | |
1199 | { | |
1200 | ch = GET (); | |
1201 | } | |
1202 | while (ch != EOF && !IS_NEWLINE (ch)); | |
1203 | if (ch == EOF) | |
1204 | as_warn (_("end of file in comment; newline inserted")); | |
1205 | state = 0; | |
1206 | PUT ('\n'); | |
1207 | break; | |
1208 | ||
1209 | case LEX_IS_SYMBOL_COMPONENT: | |
1210 | if (state == 10) | |
1211 | { | |
1212 | /* This is a symbol character following another symbol | |
1213 | character, with whitespace in between. We skipped | |
1214 | the whitespace earlier, so output it now. */ | |
1215 | UNGET (ch); | |
1216 | state = 3; | |
1217 | PUT (' '); | |
1218 | break; | |
1219 | } | |
1220 | ||
1221 | if (state == 3) | |
1222 | state = 9; | |
1223 | ||
1224 | /* This is a common case. Quickly copy CH and all the | |
1225 | following symbol component or normal characters. */ | |
1226 | if (to + 1 < toend | |
1227 | && mri_state == NULL | |
1228 | #if defined TC_ARM && defined OBJ_ELF | |
1229 | && symver_state == NULL | |
1230 | #endif | |
1231 | ) | |
1232 | { | |
1233 | char *s; | |
1234 | int len; | |
1235 | ||
1236 | for (s = from; s < fromend; s++) | |
1237 | { | |
1238 | int type; | |
1239 | ||
30a2b4ef | 1240 | ch2 = *(unsigned char *) s; |
252b5132 RH |
1241 | type = lex[ch2]; |
1242 | if (type != 0 | |
1243 | && type != LEX_IS_SYMBOL_COMPONENT) | |
1244 | break; | |
1245 | } | |
1246 | if (s > from) | |
1247 | { | |
1248 | /* Handle the last character normally, for | |
1249 | simplicity. */ | |
1250 | --s; | |
1251 | } | |
1252 | len = s - from; | |
1253 | if (len > (toend - to) - 1) | |
1254 | len = (toend - to) - 1; | |
1255 | if (len > 0) | |
1256 | { | |
1257 | PUT (ch); | |
1258 | if (len > 8) | |
1259 | { | |
1260 | memcpy (to, from, len); | |
1261 | to += len; | |
1262 | from += len; | |
1263 | } | |
1264 | else | |
1265 | { | |
1266 | switch (len) | |
1267 | { | |
1268 | case 8: *to++ = *from++; | |
1269 | case 7: *to++ = *from++; | |
1270 | case 6: *to++ = *from++; | |
1271 | case 5: *to++ = *from++; | |
1272 | case 4: *to++ = *from++; | |
1273 | case 3: *to++ = *from++; | |
1274 | case 2: *to++ = *from++; | |
1275 | case 1: *to++ = *from++; | |
1276 | } | |
3ee4defc | 1277 | } |
252b5132 RH |
1278 | ch = GET (); |
1279 | } | |
1280 | } | |
1281 | ||
1282 | /* Fall through. */ | |
1283 | default: | |
1284 | de_fault: | |
1285 | /* Some relatively `normal' character. */ | |
1286 | if (state == 0) | |
1287 | { | |
1288 | state = 11; /* Now seeing label definition */ | |
1289 | } | |
1290 | else if (state == 1) | |
1291 | { | |
1292 | state = 2; /* Ditto */ | |
1293 | } | |
1294 | else if (state == 9) | |
1295 | { | |
1296 | if (lex[ch] != LEX_IS_SYMBOL_COMPONENT) | |
1297 | state = 3; | |
1298 | } | |
1299 | else if (state == 10) | |
1300 | { | |
c5c834aa AH |
1301 | if (ch == '\\') |
1302 | { | |
1303 | /* Special handling for backslash: a backslash may | |
1304 | be the beginning of a formal parameter (of a | |
1305 | macro) following another symbol character, with | |
1306 | whitespace in between. If that is the case, we | |
1307 | output a space before the parameter. Strictly | |
1308 | speaking, correct handling depends upon what the | |
1309 | macro parameter expands into; if the parameter | |
1310 | expands into something which does not start with | |
1311 | an operand character, then we don't want to keep | |
1312 | the space. We don't have enough information to | |
1313 | make the right choice, so here we are making the | |
1314 | choice which is more likely to be correct. */ | |
1315 | PUT (' '); | |
1316 | } | |
1317 | ||
252b5132 RH |
1318 | state = 3; |
1319 | } | |
1320 | PUT (ch); | |
1321 | break; | |
1322 | } | |
1323 | } | |
1324 | ||
1325 | /*NOTREACHED*/ | |
1326 | ||
1327 | fromeof: | |
1328 | /* We have reached the end of the input. */ | |
1329 | return to - tostart; | |
1330 | ||
1331 | tofull: | |
1332 | /* The output buffer is full. Save any input we have not yet | |
1333 | processed. */ | |
1334 | if (fromend > from) | |
1335 | { | |
2b47531b | 1336 | saved_input = from; |
252b5132 RH |
1337 | saved_input_len = fromend - from; |
1338 | } | |
1339 | else | |
2b47531b ILT |
1340 | saved_input = NULL; |
1341 | ||
252b5132 RH |
1342 | return to - tostart; |
1343 | } | |
1344 | ||
1345 | /* end of app.c */ |