Commit | Line | Data |
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252b5132 | 1 | /* This is the Assembler Pre-Processor |
4b95cf5c | 2 | Copyright (C) 1987-2014 Free Software Foundation, Inc. |
252b5132 RH |
3 | |
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 8 | the Free Software Foundation; either version 3, or (at your option) |
252b5132 RH |
9 | any later version. |
10 | ||
ec2655a6 NC |
11 | GAS is distributed in the hope that it will be useful, but WITHOUT |
12 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
13 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
14 | License for more details. | |
252b5132 RH |
15 | |
16 | You should have received a copy of the GNU General Public License | |
17 | along with GAS; see the file COPYING. If not, write to the Free | |
4b4da160 NC |
18 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
19 | 02110-1301, USA. */ | |
252b5132 | 20 | |
204cd129 | 21 | /* Modified by Allen Wirfs-Brock, Instantiations Inc 2/90. */ |
93e914b2 AO |
22 | /* App, the assembler pre-processor. This pre-processor strips out |
23 | excess spaces, turns single-quoted characters into a decimal | |
24 | constant, and turns the # in # <number> <filename> <garbage> into a | |
25 | .linefile. This needs better error-handling. */ | |
252b5132 | 26 | |
ebd1c875 | 27 | #include "as.h" |
252b5132 RH |
28 | |
29 | #if (__STDC__ != 1) | |
30 | #ifndef const | |
31 | #define const /* empty */ | |
32 | #endif | |
33 | #endif | |
34 | ||
c54b5932 DD |
35 | #ifdef H_TICK_HEX |
36 | int enable_h_tick_hex = 0; | |
37 | #endif | |
38 | ||
abd63a32 | 39 | #ifdef TC_M68K |
252b5132 RH |
40 | /* Whether we are scrubbing in m68k MRI mode. This is different from |
41 | flag_m68k_mri, because the two flags will be affected by the .mri | |
42 | pseudo-op at different times. */ | |
43 | static int scrub_m68k_mri; | |
44 | ||
45 | /* The pseudo-op which switches in and out of MRI mode. See the | |
46 | comment in do_scrub_chars. */ | |
47 | static const char mri_pseudo[] = ".mri 0"; | |
72297628 AM |
48 | #else |
49 | #define scrub_m68k_mri 0 | |
50 | #endif | |
252b5132 RH |
51 | |
52 | #if defined TC_ARM && defined OBJ_ELF | |
3ee4defc | 53 | /* The pseudo-op for which we need to special-case `@' characters. |
252b5132 RH |
54 | See the comment in do_scrub_chars. */ |
55 | static const char symver_pseudo[] = ".symver"; | |
56 | static const char * symver_state; | |
57 | #endif | |
58 | ||
59 | static char lex[256]; | |
60 | static const char symbol_chars[] = | |
61 | "$._ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; | |
62 | ||
63 | #define LEX_IS_SYMBOL_COMPONENT 1 | |
64 | #define LEX_IS_WHITESPACE 2 | |
65 | #define LEX_IS_LINE_SEPARATOR 3 | |
66 | #define LEX_IS_COMMENT_START 4 | |
67 | #define LEX_IS_LINE_COMMENT_START 5 | |
68 | #define LEX_IS_TWOCHAR_COMMENT_1ST 6 | |
69 | #define LEX_IS_STRINGQUOTE 8 | |
70 | #define LEX_IS_COLON 9 | |
71 | #define LEX_IS_NEWLINE 10 | |
72 | #define LEX_IS_ONECHAR_QUOTE 11 | |
73 | #ifdef TC_V850 | |
74 | #define LEX_IS_DOUBLEDASH_1ST 12 | |
75 | #endif | |
76 | #ifdef TC_M32R | |
f28e8eb3 TW |
77 | #define DOUBLEBAR_PARALLEL |
78 | #endif | |
79 | #ifdef DOUBLEBAR_PARALLEL | |
252b5132 RH |
80 | #define LEX_IS_DOUBLEBAR_1ST 13 |
81 | #endif | |
62f65a7b | 82 | #define LEX_IS_PARALLEL_SEPARATOR 14 |
c54b5932 DD |
83 | #ifdef H_TICK_HEX |
84 | #define LEX_IS_H 15 | |
85 | #endif | |
252b5132 RH |
86 | #define IS_SYMBOL_COMPONENT(c) (lex[c] == LEX_IS_SYMBOL_COMPONENT) |
87 | #define IS_WHITESPACE(c) (lex[c] == LEX_IS_WHITESPACE) | |
88 | #define IS_LINE_SEPARATOR(c) (lex[c] == LEX_IS_LINE_SEPARATOR) | |
62f65a7b | 89 | #define IS_PARALLEL_SEPARATOR(c) (lex[c] == LEX_IS_PARALLEL_SEPARATOR) |
252b5132 RH |
90 | #define IS_COMMENT(c) (lex[c] == LEX_IS_COMMENT_START) |
91 | #define IS_LINE_COMMENT(c) (lex[c] == LEX_IS_LINE_COMMENT_START) | |
92 | #define IS_NEWLINE(c) (lex[c] == LEX_IS_NEWLINE) | |
93 | ||
73ee5e4c | 94 | static int process_escape (int); |
252b5132 RH |
95 | |
96 | /* FIXME-soon: The entire lexer/parser thingy should be | |
97 | built statically at compile time rather than dynamically | |
3ee4defc | 98 | each and every time the assembler is run. xoxorich. */ |
252b5132 | 99 | |
3ee4defc | 100 | void |
73ee5e4c | 101 | do_scrub_begin (int m68k_mri ATTRIBUTE_UNUSED) |
252b5132 RH |
102 | { |
103 | const char *p; | |
104 | int c; | |
105 | ||
252b5132 RH |
106 | lex[' '] = LEX_IS_WHITESPACE; |
107 | lex['\t'] = LEX_IS_WHITESPACE; | |
108 | lex['\r'] = LEX_IS_WHITESPACE; | |
109 | lex['\n'] = LEX_IS_NEWLINE; | |
252b5132 RH |
110 | lex[':'] = LEX_IS_COLON; |
111 | ||
abd63a32 AM |
112 | #ifdef TC_M68K |
113 | scrub_m68k_mri = m68k_mri; | |
114 | ||
252b5132 | 115 | if (! m68k_mri) |
abd63a32 | 116 | #endif |
252b5132 RH |
117 | { |
118 | lex['"'] = LEX_IS_STRINGQUOTE; | |
119 | ||
5b93d8bb | 120 | #if ! defined (TC_HPPA) && ! defined (TC_I370) |
204cd129 | 121 | /* I370 uses single-quotes to delimit integer, float constants. */ |
252b5132 RH |
122 | lex['\''] = LEX_IS_ONECHAR_QUOTE; |
123 | #endif | |
124 | ||
125 | #ifdef SINGLE_QUOTE_STRINGS | |
126 | lex['\''] = LEX_IS_STRINGQUOTE; | |
127 | #endif | |
128 | } | |
129 | ||
130 | /* Note: if any other character can be LEX_IS_STRINGQUOTE, the loop | |
131 | in state 5 of do_scrub_chars must be changed. */ | |
132 | ||
133 | /* Note that these override the previous defaults, e.g. if ';' is a | |
134 | comment char, then it isn't a line separator. */ | |
135 | for (p = symbol_chars; *p; ++p) | |
204cd129 | 136 | lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT; |
252b5132 RH |
137 | |
138 | for (c = 128; c < 256; ++c) | |
139 | lex[c] = LEX_IS_SYMBOL_COMPONENT; | |
140 | ||
141 | #ifdef tc_symbol_chars | |
142 | /* This macro permits the processor to specify all characters which | |
143 | may appears in an operand. This will prevent the scrubber from | |
144 | discarding meaningful whitespace in certain cases. The i386 | |
145 | backend uses this to support prefixes, which can confuse the | |
146 | scrubber as to whether it is parsing operands or opcodes. */ | |
147 | for (p = tc_symbol_chars; *p; ++p) | |
148 | lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT; | |
149 | #endif | |
150 | ||
151 | /* The m68k backend wants to be able to change comment_chars. */ | |
152 | #ifndef tc_comment_chars | |
153 | #define tc_comment_chars comment_chars | |
154 | #endif | |
155 | for (p = tc_comment_chars; *p; p++) | |
204cd129 | 156 | lex[(unsigned char) *p] = LEX_IS_COMMENT_START; |
252b5132 RH |
157 | |
158 | for (p = line_comment_chars; *p; p++) | |
204cd129 | 159 | lex[(unsigned char) *p] = LEX_IS_LINE_COMMENT_START; |
252b5132 | 160 | |
2e6976a8 DG |
161 | #ifndef tc_line_separator_chars |
162 | #define tc_line_separator_chars line_separator_chars | |
163 | #endif | |
164 | for (p = tc_line_separator_chars; *p; p++) | |
204cd129 | 165 | lex[(unsigned char) *p] = LEX_IS_LINE_SEPARATOR; |
252b5132 | 166 | |
62f65a7b DB |
167 | #ifdef tc_parallel_separator_chars |
168 | /* This macro permits the processor to specify all characters which | |
169 | separate parallel insns on the same line. */ | |
170 | for (p = tc_parallel_separator_chars; *p; p++) | |
204cd129 | 171 | lex[(unsigned char) *p] = LEX_IS_PARALLEL_SEPARATOR; |
62f65a7b DB |
172 | #endif |
173 | ||
252b5132 RH |
174 | /* Only allow slash-star comments if slash is not in use. |
175 | FIXME: This isn't right. We should always permit them. */ | |
176 | if (lex['/'] == 0) | |
204cd129 | 177 | lex['/'] = LEX_IS_TWOCHAR_COMMENT_1ST; |
252b5132 | 178 | |
abd63a32 | 179 | #ifdef TC_M68K |
252b5132 RH |
180 | if (m68k_mri) |
181 | { | |
182 | lex['\''] = LEX_IS_STRINGQUOTE; | |
183 | lex[';'] = LEX_IS_COMMENT_START; | |
184 | lex['*'] = LEX_IS_LINE_COMMENT_START; | |
185 | /* The MRI documentation says '!' is LEX_IS_COMMENT_START, but | |
b1ac4c66 | 186 | then it can't be used in an expression. */ |
252b5132 RH |
187 | lex['!'] = LEX_IS_LINE_COMMENT_START; |
188 | } | |
abd63a32 | 189 | #endif |
252b5132 RH |
190 | |
191 | #ifdef TC_V850 | |
192 | lex['-'] = LEX_IS_DOUBLEDASH_1ST; | |
193 | #endif | |
f28e8eb3 | 194 | #ifdef DOUBLEBAR_PARALLEL |
252b5132 RH |
195 | lex['|'] = LEX_IS_DOUBLEBAR_1ST; |
196 | #endif | |
197 | #ifdef TC_D30V | |
204cd129 | 198 | /* Must do this is we want VLIW instruction with "->" or "<-". */ |
252b5132 RH |
199 | lex['-'] = LEX_IS_SYMBOL_COMPONENT; |
200 | #endif | |
c54b5932 DD |
201 | |
202 | #ifdef H_TICK_HEX | |
203 | if (enable_h_tick_hex) | |
204 | { | |
205 | lex['h'] = LEX_IS_H; | |
206 | lex['H'] = LEX_IS_H; | |
207 | } | |
208 | #endif | |
204cd129 | 209 | } |
252b5132 | 210 | |
204cd129 | 211 | /* Saved state of the scrubber. */ |
252b5132 RH |
212 | static int state; |
213 | static int old_state; | |
214 | static char *out_string; | |
215 | static char out_buf[20]; | |
216 | static int add_newlines; | |
217 | static char *saved_input; | |
39a45edc | 218 | static size_t saved_input_len; |
2b47531b | 219 | static char input_buffer[32 * 1024]; |
252b5132 RH |
220 | static const char *mri_state; |
221 | static char mri_last_ch; | |
222 | ||
223 | /* Data structure for saving the state of app across #include's. Note that | |
224 | app is called asynchronously to the parsing of the .include's, so our | |
225 | state at the time .include is interpreted is completely unrelated. | |
226 | That's why we have to save it all. */ | |
227 | ||
204cd129 NC |
228 | struct app_save |
229 | { | |
30a2b4ef KH |
230 | int state; |
231 | int old_state; | |
232 | char * out_string; | |
233 | char out_buf[sizeof (out_buf)]; | |
234 | int add_newlines; | |
235 | char * saved_input; | |
39a45edc | 236 | size_t saved_input_len; |
abd63a32 | 237 | #ifdef TC_M68K |
30a2b4ef | 238 | int scrub_m68k_mri; |
abd63a32 | 239 | #endif |
30a2b4ef KH |
240 | const char * mri_state; |
241 | char mri_last_ch; | |
252b5132 | 242 | #if defined TC_ARM && defined OBJ_ELF |
30a2b4ef | 243 | const char * symver_state; |
252b5132 | 244 | #endif |
30a2b4ef | 245 | }; |
252b5132 RH |
246 | |
247 | char * | |
73ee5e4c | 248 | app_push (void) |
252b5132 | 249 | { |
ed9e98c2 | 250 | struct app_save *saved; |
252b5132 RH |
251 | |
252 | saved = (struct app_save *) xmalloc (sizeof (*saved)); | |
253 | saved->state = state; | |
254 | saved->old_state = old_state; | |
255 | saved->out_string = out_string; | |
256 | memcpy (saved->out_buf, out_buf, sizeof (out_buf)); | |
257 | saved->add_newlines = add_newlines; | |
2b47531b ILT |
258 | if (saved_input == NULL) |
259 | saved->saved_input = NULL; | |
260 | else | |
261 | { | |
1e9cc1c2 | 262 | saved->saved_input = (char *) xmalloc (saved_input_len); |
2b47531b ILT |
263 | memcpy (saved->saved_input, saved_input, saved_input_len); |
264 | saved->saved_input_len = saved_input_len; | |
265 | } | |
abd63a32 | 266 | #ifdef TC_M68K |
252b5132 | 267 | saved->scrub_m68k_mri = scrub_m68k_mri; |
abd63a32 | 268 | #endif |
252b5132 RH |
269 | saved->mri_state = mri_state; |
270 | saved->mri_last_ch = mri_last_ch; | |
271 | #if defined TC_ARM && defined OBJ_ELF | |
272 | saved->symver_state = symver_state; | |
273 | #endif | |
274 | ||
3ee4defc | 275 | /* do_scrub_begin() is not useful, just wastes time. */ |
252b5132 RH |
276 | |
277 | state = 0; | |
278 | saved_input = NULL; | |
f8819316 | 279 | add_newlines = 0; |
252b5132 RH |
280 | |
281 | return (char *) saved; | |
282 | } | |
283 | ||
3ee4defc | 284 | void |
73ee5e4c | 285 | app_pop (char *arg) |
252b5132 | 286 | { |
ed9e98c2 | 287 | struct app_save *saved = (struct app_save *) arg; |
252b5132 | 288 | |
3ee4defc | 289 | /* There is no do_scrub_end (). */ |
252b5132 RH |
290 | state = saved->state; |
291 | old_state = saved->old_state; | |
292 | out_string = saved->out_string; | |
293 | memcpy (out_buf, saved->out_buf, sizeof (out_buf)); | |
294 | add_newlines = saved->add_newlines; | |
2b47531b ILT |
295 | if (saved->saved_input == NULL) |
296 | saved_input = NULL; | |
297 | else | |
298 | { | |
39a45edc | 299 | gas_assert (saved->saved_input_len <= sizeof (input_buffer)); |
2b47531b ILT |
300 | memcpy (input_buffer, saved->saved_input, saved->saved_input_len); |
301 | saved_input = input_buffer; | |
302 | saved_input_len = saved->saved_input_len; | |
303 | free (saved->saved_input); | |
304 | } | |
abd63a32 | 305 | #ifdef TC_M68K |
252b5132 | 306 | scrub_m68k_mri = saved->scrub_m68k_mri; |
abd63a32 | 307 | #endif |
252b5132 RH |
308 | mri_state = saved->mri_state; |
309 | mri_last_ch = saved->mri_last_ch; | |
310 | #if defined TC_ARM && defined OBJ_ELF | |
311 | symver_state = saved->symver_state; | |
312 | #endif | |
313 | ||
314 | free (arg); | |
204cd129 | 315 | } |
252b5132 RH |
316 | |
317 | /* @@ This assumes that \n &c are the same on host and target. This is not | |
318 | necessarily true. */ | |
204cd129 | 319 | |
3ee4defc | 320 | static int |
73ee5e4c | 321 | process_escape (int ch) |
252b5132 RH |
322 | { |
323 | switch (ch) | |
324 | { | |
325 | case 'b': | |
326 | return '\b'; | |
327 | case 'f': | |
328 | return '\f'; | |
329 | case 'n': | |
330 | return '\n'; | |
331 | case 'r': | |
332 | return '\r'; | |
333 | case 't': | |
334 | return '\t'; | |
335 | case '\'': | |
336 | return '\''; | |
337 | case '"': | |
338 | return '\"'; | |
339 | default: | |
340 | return ch; | |
341 | } | |
342 | } | |
343 | ||
344 | /* This function is called to process input characters. The GET | |
345 | parameter is used to retrieve more input characters. GET should | |
346 | set its parameter to point to a buffer, and return the length of | |
347 | the buffer; it should return 0 at end of file. The scrubbed output | |
348 | characters are put into the buffer starting at TOSTART; the TOSTART | |
349 | buffer is TOLEN bytes in length. The function returns the number | |
350 | of scrubbed characters put into TOSTART. This will be TOLEN unless | |
351 | end of file was seen. This function is arranged as a state | |
352 | machine, and saves its state so that it may return at any point. | |
353 | This is the way the old code used to work. */ | |
354 | ||
39a45edc AM |
355 | size_t |
356 | do_scrub_chars (size_t (*get) (char *, size_t), char *tostart, size_t tolen) | |
252b5132 RH |
357 | { |
358 | char *to = tostart; | |
359 | char *toend = tostart + tolen; | |
360 | char *from; | |
361 | char *fromend; | |
39a45edc | 362 | size_t fromlen; |
ed9e98c2 | 363 | int ch, ch2 = 0; |
c9c5dcda AM |
364 | /* Character that started the string we're working on. */ |
365 | static char quotechar; | |
252b5132 RH |
366 | |
367 | /*State 0: beginning of normal line | |
368 | 1: After first whitespace on line (flush more white) | |
369 | 2: After first non-white (opcode) on line (keep 1white) | |
370 | 3: after second white on line (into operands) (flush white) | |
93e914b2 | 371 | 4: after putting out a .linefile, put out digits |
252b5132 RH |
372 | 5: parsing a string, then go to old-state |
373 | 6: putting out \ escape in a "d string. | |
93e914b2 | 374 | 7: no longer used |
e9fc6c21 | 375 | 8: no longer used |
252b5132 RH |
376 | 9: After seeing symbol char in state 3 (keep 1white after symchar) |
377 | 10: After seeing whitespace in state 9 (keep white before symchar) | |
378 | 11: After seeing a symbol character in state 0 (eg a label definition) | |
379 | -1: output string in out_string and go to the state in old_state | |
380 | -2: flush text until a '*' '/' is seen, then go to state old_state | |
381 | #ifdef TC_V850 | |
b1ac4c66 AM |
382 | 12: After seeing a dash, looking for a second dash as a start |
383 | of comment. | |
252b5132 | 384 | #endif |
f28e8eb3 | 385 | #ifdef DOUBLEBAR_PARALLEL |
b1ac4c66 AM |
386 | 13: After seeing a vertical bar, looking for a second |
387 | vertical bar as a parallel expression separator. | |
52628315 | 388 | #endif |
40b36596 JM |
389 | #ifdef TC_PREDICATE_START_CHAR |
390 | 14: After seeing a predicate start character at state 0, looking | |
391 | for a predicate end character as predicate. | |
392 | 15: After seeing a predicate start character at state 1, looking | |
393 | for a predicate end character as predicate. | |
3c9b82ba NC |
394 | #endif |
395 | #ifdef TC_Z80 | |
396 | 16: After seeing an 'a' or an 'A' at the start of a symbol | |
397 | 17: After seeing an 'f' or an 'F' in state 16 | |
252b5132 RH |
398 | #endif |
399 | */ | |
400 | ||
401 | /* I added states 9 and 10 because the MIPS ECOFF assembler uses | |
402 | constructs like ``.loc 1 20''. This was turning into ``.loc | |
403 | 120''. States 9 and 10 ensure that a space is never dropped in | |
3b37fd66 | 404 | between characters which could appear in an identifier. Ian |
252b5132 RH |
405 | Taylor, ian@cygnus.com. |
406 | ||
407 | I added state 11 so that something like "Lfoo add %r25,%r26,%r27" works | |
408 | correctly on the PA (and any other target where colons are optional). | |
409 | Jeff Law, law@cs.utah.edu. | |
410 | ||
411 | I added state 13 so that something like "cmp r1, r2 || trap #1" does not | |
412 | get squashed into "cmp r1,r2||trap#1", with the all important space | |
413 | between the 'trap' and the '#1' being eliminated. nickc@cygnus.com */ | |
414 | ||
415 | /* This macro gets the next input character. */ | |
416 | ||
2b47531b ILT |
417 | #define GET() \ |
418 | (from < fromend \ | |
419 | ? * (unsigned char *) (from++) \ | |
420 | : (saved_input = NULL, \ | |
421 | fromlen = (*get) (input_buffer, sizeof input_buffer), \ | |
422 | from = input_buffer, \ | |
423 | fromend = from + fromlen, \ | |
424 | (fromlen == 0 \ | |
425 | ? EOF \ | |
252b5132 RH |
426 | : * (unsigned char *) (from++)))) |
427 | ||
428 | /* This macro pushes a character back on the input stream. */ | |
429 | ||
430 | #define UNGET(uch) (*--from = (uch)) | |
431 | ||
432 | /* This macro puts a character into the output buffer. If this | |
433 | character fills the output buffer, this macro jumps to the label | |
434 | TOFULL. We use this rather ugly approach because we need to | |
435 | handle two different termination conditions: EOF on the input | |
436 | stream, and a full output buffer. It would be simpler if we | |
437 | always read in the entire input stream before processing it, but | |
438 | I don't want to make such a significant change to the assembler's | |
439 | memory usage. */ | |
440 | ||
411863a4 KH |
441 | #define PUT(pch) \ |
442 | do \ | |
443 | { \ | |
444 | *to++ = (pch); \ | |
445 | if (to >= toend) \ | |
446 | goto tofull; \ | |
447 | } \ | |
252b5132 RH |
448 | while (0) |
449 | ||
450 | if (saved_input != NULL) | |
451 | { | |
452 | from = saved_input; | |
453 | fromend = from + saved_input_len; | |
454 | } | |
455 | else | |
456 | { | |
2b47531b | 457 | fromlen = (*get) (input_buffer, sizeof input_buffer); |
252b5132 RH |
458 | if (fromlen == 0) |
459 | return 0; | |
2b47531b | 460 | from = input_buffer; |
252b5132 RH |
461 | fromend = from + fromlen; |
462 | } | |
463 | ||
464 | while (1) | |
465 | { | |
466 | /* The cases in this switch end with continue, in order to | |
b1ac4c66 AM |
467 | branch back to the top of this while loop and generate the |
468 | next output character in the appropriate state. */ | |
252b5132 RH |
469 | switch (state) |
470 | { | |
471 | case -1: | |
472 | ch = *out_string++; | |
473 | if (*out_string == '\0') | |
474 | { | |
475 | state = old_state; | |
476 | old_state = 3; | |
477 | } | |
478 | PUT (ch); | |
479 | continue; | |
480 | ||
481 | case -2: | |
482 | for (;;) | |
483 | { | |
484 | do | |
485 | { | |
486 | ch = GET (); | |
487 | ||
488 | if (ch == EOF) | |
489 | { | |
490 | as_warn (_("end of file in comment")); | |
491 | goto fromeof; | |
492 | } | |
493 | ||
494 | if (ch == '\n') | |
495 | PUT ('\n'); | |
496 | } | |
497 | while (ch != '*'); | |
498 | ||
499 | while ((ch = GET ()) == '*') | |
500 | ; | |
501 | ||
502 | if (ch == EOF) | |
503 | { | |
504 | as_warn (_("end of file in comment")); | |
505 | goto fromeof; | |
506 | } | |
507 | ||
508 | if (ch == '/') | |
509 | break; | |
510 | ||
511 | UNGET (ch); | |
512 | } | |
513 | ||
514 | state = old_state; | |
515 | UNGET (' '); | |
516 | continue; | |
517 | ||
518 | case 4: | |
519 | ch = GET (); | |
520 | if (ch == EOF) | |
521 | goto fromeof; | |
522 | else if (ch >= '0' && ch <= '9') | |
523 | PUT (ch); | |
524 | else | |
525 | { | |
526 | while (ch != EOF && IS_WHITESPACE (ch)) | |
527 | ch = GET (); | |
528 | if (ch == '"') | |
529 | { | |
93e914b2 AO |
530 | quotechar = ch; |
531 | state = 5; | |
e9fc6c21 | 532 | old_state = 3; |
4061927e | 533 | PUT (ch); |
252b5132 RH |
534 | } |
535 | else | |
536 | { | |
537 | while (ch != EOF && ch != '\n') | |
538 | ch = GET (); | |
539 | state = 0; | |
540 | PUT (ch); | |
541 | } | |
542 | } | |
543 | continue; | |
544 | ||
545 | case 5: | |
546 | /* We are going to copy everything up to a quote character, | |
b1ac4c66 AM |
547 | with special handling for a backslash. We try to |
548 | optimize the copying in the simple case without using the | |
549 | GET and PUT macros. */ | |
252b5132 RH |
550 | { |
551 | char *s; | |
39a45edc | 552 | ptrdiff_t len; |
252b5132 RH |
553 | |
554 | for (s = from; s < fromend; s++) | |
555 | { | |
556 | ch = *s; | |
252b5132 | 557 | if (ch == '\\' |
c9c5dcda | 558 | || ch == quotechar |
252b5132 RH |
559 | || ch == '\n') |
560 | break; | |
561 | } | |
562 | len = s - from; | |
563 | if (len > toend - to) | |
564 | len = toend - to; | |
565 | if (len > 0) | |
566 | { | |
567 | memcpy (to, from, len); | |
568 | to += len; | |
569 | from += len; | |
df816087 AM |
570 | if (to >= toend) |
571 | goto tofull; | |
252b5132 RH |
572 | } |
573 | } | |
574 | ||
575 | ch = GET (); | |
576 | if (ch == EOF) | |
577 | { | |
fc5910c0 NC |
578 | /* This buffer is here specifically so |
579 | that the UNGET below will work. */ | |
580 | static char one_char_buf[1]; | |
581 | ||
c9c5dcda | 582 | as_warn (_("end of file in string; '%c' inserted"), quotechar); |
252b5132 | 583 | state = old_state; |
fc5910c0 NC |
584 | from = fromend = one_char_buf + 1; |
585 | fromlen = 1; | |
252b5132 | 586 | UNGET ('\n'); |
c9c5dcda | 587 | PUT (quotechar); |
252b5132 | 588 | } |
c9c5dcda | 589 | else if (ch == quotechar) |
252b5132 RH |
590 | { |
591 | state = old_state; | |
592 | PUT (ch); | |
593 | } | |
594 | #ifndef NO_STRING_ESCAPES | |
595 | else if (ch == '\\') | |
596 | { | |
597 | state = 6; | |
598 | PUT (ch); | |
599 | } | |
600 | #endif | |
601 | else if (scrub_m68k_mri && ch == '\n') | |
602 | { | |
603 | /* Just quietly terminate the string. This permits lines like | |
204cd129 | 604 | bne label loop if we haven't reach end yet. */ |
252b5132 RH |
605 | state = old_state; |
606 | UNGET (ch); | |
607 | PUT ('\''); | |
608 | } | |
609 | else | |
610 | { | |
611 | PUT (ch); | |
612 | } | |
613 | continue; | |
614 | ||
615 | case 6: | |
616 | state = 5; | |
617 | ch = GET (); | |
618 | switch (ch) | |
619 | { | |
620 | /* Handle strings broken across lines, by turning '\n' into | |
621 | '\\' and 'n'. */ | |
622 | case '\n': | |
623 | UNGET ('n'); | |
624 | add_newlines++; | |
625 | PUT ('\\'); | |
626 | continue; | |
627 | ||
4252e537 | 628 | case EOF: |
c9c5dcda AM |
629 | as_warn (_("end of file in string; '%c' inserted"), quotechar); |
630 | PUT (quotechar); | |
4252e537 AM |
631 | continue; |
632 | ||
252b5132 RH |
633 | case '"': |
634 | case '\\': | |
635 | case 'b': | |
636 | case 'f': | |
637 | case 'n': | |
638 | case 'r': | |
639 | case 't': | |
640 | case 'v': | |
641 | case 'x': | |
642 | case 'X': | |
643 | case '0': | |
644 | case '1': | |
645 | case '2': | |
646 | case '3': | |
647 | case '4': | |
648 | case '5': | |
649 | case '6': | |
650 | case '7': | |
651 | break; | |
4252e537 | 652 | |
252b5132 | 653 | default: |
4252e537 | 654 | #ifdef ONLY_STANDARD_ESCAPES |
0e389e77 | 655 | as_warn (_("unknown escape '\\%c' in string; ignored"), ch); |
4252e537 | 656 | #endif |
252b5132 | 657 | break; |
252b5132 RH |
658 | } |
659 | PUT (ch); | |
660 | continue; | |
661 | ||
b1ac4c66 AM |
662 | #ifdef DOUBLEBAR_PARALLEL |
663 | case 13: | |
664 | ch = GET (); | |
665 | if (ch != '|') | |
666 | abort (); | |
667 | ||
668 | /* Reset back to state 1 and pretend that we are parsing a | |
669 | line from just after the first white space. */ | |
670 | state = 1; | |
671 | PUT ('|'); | |
40b36596 JM |
672 | #ifdef TC_TIC6X |
673 | /* "||^" is used for SPMASKed instructions. */ | |
674 | ch = GET (); | |
675 | if (ch == EOF) | |
676 | goto fromeof; | |
677 | else if (ch == '^') | |
678 | PUT ('^'); | |
679 | else | |
680 | UNGET (ch); | |
681 | #endif | |
b1ac4c66 | 682 | continue; |
3c9b82ba NC |
683 | #endif |
684 | #ifdef TC_Z80 | |
685 | case 16: | |
686 | /* We have seen an 'a' at the start of a symbol, look for an 'f'. */ | |
687 | ch = GET (); | |
34bca508 | 688 | if (ch == 'f' || ch == 'F') |
3c9b82ba NC |
689 | { |
690 | state = 17; | |
691 | PUT (ch); | |
692 | } | |
693 | else | |
694 | { | |
695 | state = 9; | |
696 | break; | |
697 | } | |
698 | case 17: | |
699 | /* We have seen "af" at the start of a symbol, | |
700 | a ' here is a part of that symbol. */ | |
701 | ch = GET (); | |
702 | state = 9; | |
703 | if (ch == '\'') | |
704 | /* Change to avoid warning about unclosed string. */ | |
705 | PUT ('`'); | |
0146fc9d | 706 | else if (ch != EOF) |
3c9b82ba NC |
707 | UNGET (ch); |
708 | break; | |
b1ac4c66 | 709 | #endif |
252b5132 RH |
710 | } |
711 | ||
204cd129 | 712 | /* OK, we are somewhere in states 0 through 4 or 9 through 11. */ |
252b5132 RH |
713 | |
714 | /* flushchar: */ | |
715 | ch = GET (); | |
716 | ||
40b36596 JM |
717 | #ifdef TC_PREDICATE_START_CHAR |
718 | if (ch == TC_PREDICATE_START_CHAR && (state == 0 || state == 1)) | |
52628315 L |
719 | { |
720 | state += 14; | |
721 | PUT (ch); | |
722 | continue; | |
723 | } | |
724 | else if (state == 14 || state == 15) | |
725 | { | |
40b36596 | 726 | if (ch == TC_PREDICATE_END_CHAR) |
70b911ad JJ |
727 | { |
728 | state -= 14; | |
729 | PUT (ch); | |
730 | ch = GET (); | |
731 | } | |
52628315 L |
732 | else |
733 | { | |
734 | PUT (ch); | |
735 | continue; | |
736 | } | |
737 | } | |
738 | #endif | |
739 | ||
252b5132 RH |
740 | recycle: |
741 | ||
742 | #if defined TC_ARM && defined OBJ_ELF | |
743 | /* We need to watch out for .symver directives. See the comment later | |
744 | in this function. */ | |
745 | if (symver_state == NULL) | |
746 | { | |
747 | if ((state == 0 || state == 1) && ch == symver_pseudo[0]) | |
748 | symver_state = symver_pseudo + 1; | |
749 | } | |
750 | else | |
751 | { | |
752 | /* We advance to the next state if we find the right | |
753 | character. */ | |
754 | if (ch != '\0' && (*symver_state == ch)) | |
755 | ++symver_state; | |
756 | else if (*symver_state != '\0') | |
757 | /* We did not get the expected character, or we didn't | |
758 | get a valid terminating character after seeing the | |
759 | entire pseudo-op, so we must go back to the beginning. */ | |
760 | symver_state = NULL; | |
761 | else | |
762 | { | |
763 | /* We've read the entire pseudo-op. If this is the end | |
764 | of the line, go back to the beginning. */ | |
765 | if (IS_NEWLINE (ch)) | |
766 | symver_state = NULL; | |
767 | } | |
768 | } | |
769 | #endif /* TC_ARM && OBJ_ELF */ | |
770 | ||
771 | #ifdef TC_M68K | |
772 | /* We want to have pseudo-ops which control whether we are in | |
b1ac4c66 AM |
773 | MRI mode or not. Unfortunately, since m68k MRI mode affects |
774 | the scrubber, that means that we need a special purpose | |
775 | recognizer here. */ | |
252b5132 RH |
776 | if (mri_state == NULL) |
777 | { | |
778 | if ((state == 0 || state == 1) | |
779 | && ch == mri_pseudo[0]) | |
780 | mri_state = mri_pseudo + 1; | |
781 | } | |
782 | else | |
783 | { | |
784 | /* We advance to the next state if we find the right | |
785 | character, or if we need a space character and we get any | |
786 | whitespace character, or if we need a '0' and we get a | |
787 | '1' (this is so that we only need one state to handle | |
788 | ``.mri 0'' and ``.mri 1''). */ | |
789 | if (ch != '\0' | |
790 | && (*mri_state == ch | |
791 | || (*mri_state == ' ' | |
792 | && lex[ch] == LEX_IS_WHITESPACE) | |
793 | || (*mri_state == '0' | |
794 | && ch == '1'))) | |
795 | { | |
796 | mri_last_ch = ch; | |
797 | ++mri_state; | |
798 | } | |
799 | else if (*mri_state != '\0' | |
800 | || (lex[ch] != LEX_IS_WHITESPACE | |
801 | && lex[ch] != LEX_IS_NEWLINE)) | |
802 | { | |
803 | /* We did not get the expected character, or we didn't | |
804 | get a valid terminating character after seeing the | |
805 | entire pseudo-op, so we must go back to the | |
806 | beginning. */ | |
807 | mri_state = NULL; | |
808 | } | |
809 | else | |
810 | { | |
811 | /* We've read the entire pseudo-op. mips_last_ch is | |
b1ac4c66 AM |
812 | either '0' or '1' indicating whether to enter or |
813 | leave MRI mode. */ | |
252b5132 RH |
814 | do_scrub_begin (mri_last_ch == '1'); |
815 | mri_state = NULL; | |
816 | ||
817 | /* We continue handling the character as usual. The | |
b1ac4c66 AM |
818 | main gas reader must also handle the .mri pseudo-op |
819 | to control expression parsing and the like. */ | |
252b5132 RH |
820 | } |
821 | } | |
822 | #endif | |
823 | ||
824 | if (ch == EOF) | |
825 | { | |
826 | if (state != 0) | |
827 | { | |
828 | as_warn (_("end of file not at end of a line; newline inserted")); | |
829 | state = 0; | |
830 | PUT ('\n'); | |
831 | } | |
832 | goto fromeof; | |
833 | } | |
834 | ||
835 | switch (lex[ch]) | |
836 | { | |
837 | case LEX_IS_WHITESPACE: | |
838 | do | |
839 | { | |
840 | ch = GET (); | |
841 | } | |
842 | while (ch != EOF && IS_WHITESPACE (ch)); | |
843 | if (ch == EOF) | |
844 | goto fromeof; | |
845 | ||
846 | if (state == 0) | |
847 | { | |
848 | /* Preserve a single whitespace character at the | |
849 | beginning of a line. */ | |
850 | state = 1; | |
851 | UNGET (ch); | |
852 | PUT (' '); | |
853 | break; | |
854 | } | |
855 | ||
f28e8eb3 | 856 | #ifdef KEEP_WHITE_AROUND_COLON |
30a2b4ef KH |
857 | if (lex[ch] == LEX_IS_COLON) |
858 | { | |
859 | /* Only keep this white if there's no white *after* the | |
b1ac4c66 | 860 | colon. */ |
30a2b4ef | 861 | ch2 = GET (); |
83bd7402 NC |
862 | if (ch2 != EOF) |
863 | UNGET (ch2); | |
30a2b4ef KH |
864 | if (!IS_WHITESPACE (ch2)) |
865 | { | |
866 | state = 9; | |
867 | UNGET (ch); | |
868 | PUT (' '); | |
869 | break; | |
870 | } | |
871 | } | |
f28e8eb3 | 872 | #endif |
252b5132 RH |
873 | if (IS_COMMENT (ch) |
874 | || ch == '/' | |
62f65a7b DB |
875 | || IS_LINE_SEPARATOR (ch) |
876 | || IS_PARALLEL_SEPARATOR (ch)) | |
252b5132 RH |
877 | { |
878 | if (scrub_m68k_mri) | |
879 | { | |
880 | /* In MRI mode, we keep these spaces. */ | |
881 | UNGET (ch); | |
882 | PUT (' '); | |
883 | break; | |
884 | } | |
885 | goto recycle; | |
886 | } | |
887 | ||
888 | /* If we're in state 2 or 11, we've seen a non-white | |
889 | character followed by whitespace. If the next character | |
890 | is ':', this is whitespace after a label name which we | |
891 | normally must ignore. In MRI mode, though, spaces are | |
892 | not permitted between the label and the colon. */ | |
893 | if ((state == 2 || state == 11) | |
894 | && lex[ch] == LEX_IS_COLON | |
895 | && ! scrub_m68k_mri) | |
896 | { | |
897 | state = 1; | |
898 | PUT (ch); | |
899 | break; | |
900 | } | |
901 | ||
902 | switch (state) | |
903 | { | |
252b5132 RH |
904 | case 1: |
905 | /* We can arrive here if we leave a leading whitespace | |
906 | character at the beginning of a line. */ | |
907 | goto recycle; | |
908 | case 2: | |
909 | state = 3; | |
910 | if (to + 1 < toend) | |
911 | { | |
912 | /* Optimize common case by skipping UNGET/GET. */ | |
913 | PUT (' '); /* Sp after opco */ | |
914 | goto recycle; | |
915 | } | |
916 | UNGET (ch); | |
917 | PUT (' '); | |
918 | break; | |
919 | case 3: | |
40b36596 JM |
920 | #ifndef TC_KEEP_OPERAND_SPACES |
921 | /* For TI C6X, we keep these spaces as they may separate | |
922 | functional unit specifiers from operands. */ | |
252b5132 | 923 | if (scrub_m68k_mri) |
40b36596 | 924 | #endif |
252b5132 RH |
925 | { |
926 | /* In MRI mode, we keep these spaces. */ | |
927 | UNGET (ch); | |
928 | PUT (' '); | |
929 | break; | |
930 | } | |
931 | goto recycle; /* Sp in operands */ | |
932 | case 9: | |
933 | case 10: | |
40b36596 | 934 | #ifndef TC_KEEP_OPERAND_SPACES |
252b5132 | 935 | if (scrub_m68k_mri) |
40b36596 | 936 | #endif |
252b5132 RH |
937 | { |
938 | /* In MRI mode, we keep these spaces. */ | |
939 | state = 3; | |
940 | UNGET (ch); | |
941 | PUT (' '); | |
942 | break; | |
943 | } | |
944 | state = 10; /* Sp after symbol char */ | |
945 | goto recycle; | |
946 | case 11: | |
abd63a32 | 947 | if (LABELS_WITHOUT_COLONS || flag_m68k_mri) |
252b5132 RH |
948 | state = 1; |
949 | else | |
950 | { | |
951 | /* We know that ch is not ':', since we tested that | |
b1ac4c66 AM |
952 | case above. Therefore this is not a label, so it |
953 | must be the opcode, and we've just seen the | |
954 | whitespace after it. */ | |
252b5132 RH |
955 | state = 3; |
956 | } | |
957 | UNGET (ch); | |
958 | PUT (' '); /* Sp after label definition. */ | |
959 | break; | |
960 | default: | |
961 | BAD_CASE (state); | |
962 | } | |
963 | break; | |
964 | ||
965 | case LEX_IS_TWOCHAR_COMMENT_1ST: | |
966 | ch2 = GET (); | |
967 | if (ch2 == '*') | |
968 | { | |
969 | for (;;) | |
970 | { | |
971 | do | |
972 | { | |
973 | ch2 = GET (); | |
974 | if (ch2 != EOF && IS_NEWLINE (ch2)) | |
975 | add_newlines++; | |
976 | } | |
977 | while (ch2 != EOF && ch2 != '*'); | |
978 | ||
979 | while (ch2 == '*') | |
980 | ch2 = GET (); | |
981 | ||
982 | if (ch2 == EOF || ch2 == '/') | |
983 | break; | |
984 | ||
985 | /* This UNGET will ensure that we count newlines | |
b1ac4c66 | 986 | correctly. */ |
252b5132 RH |
987 | UNGET (ch2); |
988 | } | |
989 | ||
990 | if (ch2 == EOF) | |
991 | as_warn (_("end of file in multiline comment")); | |
992 | ||
993 | ch = ' '; | |
994 | goto recycle; | |
995 | } | |
800eeca4 JW |
996 | #ifdef DOUBLESLASH_LINE_COMMENTS |
997 | else if (ch2 == '/') | |
998 | { | |
999 | do | |
1000 | { | |
1001 | ch = GET (); | |
1002 | } | |
1003 | while (ch != EOF && !IS_NEWLINE (ch)); | |
1004 | if (ch == EOF) | |
1005 | as_warn ("end of file in comment; newline inserted"); | |
1006 | state = 0; | |
1007 | PUT ('\n'); | |
1008 | break; | |
1009 | } | |
1010 | #endif | |
252b5132 RH |
1011 | else |
1012 | { | |
1013 | if (ch2 != EOF) | |
1014 | UNGET (ch2); | |
1015 | if (state == 9 || state == 10) | |
1016 | state = 3; | |
1017 | PUT (ch); | |
1018 | } | |
1019 | break; | |
1020 | ||
1021 | case LEX_IS_STRINGQUOTE: | |
c9c5dcda | 1022 | quotechar = ch; |
252b5132 RH |
1023 | if (state == 10) |
1024 | { | |
204cd129 | 1025 | /* Preserve the whitespace in foo "bar". */ |
252b5132 RH |
1026 | UNGET (ch); |
1027 | state = 3; | |
1028 | PUT (' '); | |
1029 | ||
1030 | /* PUT didn't jump out. We could just break, but we | |
b1ac4c66 | 1031 | know what will happen, so optimize a bit. */ |
252b5132 RH |
1032 | ch = GET (); |
1033 | old_state = 3; | |
1034 | } | |
1035 | else if (state == 9) | |
1036 | old_state = 3; | |
1037 | else | |
1038 | old_state = state; | |
1039 | state = 5; | |
1040 | PUT (ch); | |
1041 | break; | |
1042 | ||
1043 | #ifndef IEEE_STYLE | |
1044 | case LEX_IS_ONECHAR_QUOTE: | |
c0a139c7 NC |
1045 | #ifdef H_TICK_HEX |
1046 | if (state == 9 && enable_h_tick_hex) | |
c54b5932 DD |
1047 | { |
1048 | char c; | |
1049 | ||
1050 | c = GET (); | |
1051 | as_warn ("'%c found after symbol", c); | |
1052 | UNGET (c); | |
1053 | } | |
c0a139c7 | 1054 | #endif |
252b5132 RH |
1055 | if (state == 10) |
1056 | { | |
204cd129 | 1057 | /* Preserve the whitespace in foo 'b'. */ |
252b5132 RH |
1058 | UNGET (ch); |
1059 | state = 3; | |
1060 | PUT (' '); | |
1061 | break; | |
1062 | } | |
1063 | ch = GET (); | |
1064 | if (ch == EOF) | |
1065 | { | |
1066 | as_warn (_("end of file after a one-character quote; \\0 inserted")); | |
1067 | ch = 0; | |
1068 | } | |
1069 | if (ch == '\\') | |
1070 | { | |
1071 | ch = GET (); | |
1072 | if (ch == EOF) | |
1073 | { | |
1074 | as_warn (_("end of file in escape character")); | |
1075 | ch = '\\'; | |
1076 | } | |
1077 | else | |
1078 | ch = process_escape (ch); | |
1079 | } | |
1080 | sprintf (out_buf, "%d", (int) (unsigned char) ch); | |
1081 | ||
1082 | /* None of these 'x constants for us. We want 'x'. */ | |
1083 | if ((ch = GET ()) != '\'') | |
1084 | { | |
1085 | #ifdef REQUIRE_CHAR_CLOSE_QUOTE | |
0e389e77 | 1086 | as_warn (_("missing close quote; (assumed)")); |
252b5132 RH |
1087 | #else |
1088 | if (ch != EOF) | |
1089 | UNGET (ch); | |
1090 | #endif | |
1091 | } | |
1092 | if (strlen (out_buf) == 1) | |
1093 | { | |
1094 | PUT (out_buf[0]); | |
1095 | break; | |
1096 | } | |
1097 | if (state == 9) | |
1098 | old_state = 3; | |
1099 | else | |
1100 | old_state = state; | |
1101 | state = -1; | |
1102 | out_string = out_buf; | |
1103 | PUT (*out_string++); | |
1104 | break; | |
1105 | #endif | |
1106 | ||
1107 | case LEX_IS_COLON: | |
f28e8eb3 | 1108 | #ifdef KEEP_WHITE_AROUND_COLON |
30a2b4ef | 1109 | state = 9; |
f28e8eb3 | 1110 | #else |
252b5132 RH |
1111 | if (state == 9 || state == 10) |
1112 | state = 3; | |
1113 | else if (state != 3) | |
1114 | state = 1; | |
f28e8eb3 | 1115 | #endif |
252b5132 RH |
1116 | PUT (ch); |
1117 | break; | |
1118 | ||
1119 | case LEX_IS_NEWLINE: | |
1120 | /* Roll out a bunch of newlines from inside comments, etc. */ | |
1121 | if (add_newlines) | |
1122 | { | |
1123 | --add_newlines; | |
1124 | UNGET (ch); | |
1125 | } | |
3ee4defc | 1126 | /* Fall through. */ |
252b5132 RH |
1127 | |
1128 | case LEX_IS_LINE_SEPARATOR: | |
1129 | state = 0; | |
1130 | PUT (ch); | |
1131 | break; | |
1132 | ||
62f65a7b DB |
1133 | case LEX_IS_PARALLEL_SEPARATOR: |
1134 | state = 1; | |
1135 | PUT (ch); | |
1136 | break; | |
1137 | ||
252b5132 RH |
1138 | #ifdef TC_V850 |
1139 | case LEX_IS_DOUBLEDASH_1ST: | |
30a2b4ef | 1140 | ch2 = GET (); |
252b5132 RH |
1141 | if (ch2 != '-') |
1142 | { | |
0146fc9d NC |
1143 | if (ch2 != EOF) |
1144 | UNGET (ch2); | |
252b5132 RH |
1145 | goto de_fault; |
1146 | } | |
3ee4defc | 1147 | /* Read and skip to end of line. */ |
252b5132 RH |
1148 | do |
1149 | { | |
1150 | ch = GET (); | |
1151 | } | |
1152 | while (ch != EOF && ch != '\n'); | |
204cd129 | 1153 | |
252b5132 | 1154 | if (ch == EOF) |
204cd129 NC |
1155 | as_warn (_("end of file in comment; newline inserted")); |
1156 | ||
252b5132 RH |
1157 | state = 0; |
1158 | PUT ('\n'); | |
1159 | break; | |
3ee4defc | 1160 | #endif |
f28e8eb3 | 1161 | #ifdef DOUBLEBAR_PARALLEL |
252b5132 | 1162 | case LEX_IS_DOUBLEBAR_1ST: |
30a2b4ef | 1163 | ch2 = GET (); |
83bd7402 NC |
1164 | if (ch2 != EOF) |
1165 | UNGET (ch2); | |
252b5132 | 1166 | if (ch2 != '|') |
204cd129 NC |
1167 | goto de_fault; |
1168 | ||
b1ac4c66 AM |
1169 | /* Handle '||' in two states as invoking PUT twice might |
1170 | result in the first one jumping out of this loop. We'd | |
1171 | then lose track of the state and one '|' char. */ | |
1172 | state = 13; | |
252b5132 RH |
1173 | PUT ('|'); |
1174 | break; | |
3ee4defc | 1175 | #endif |
252b5132 RH |
1176 | case LEX_IS_LINE_COMMENT_START: |
1177 | /* FIXME-someday: The two character comment stuff was badly | |
1178 | thought out. On i386, we want '/' as line comment start | |
1179 | AND we want C style comments. hence this hack. The | |
1180 | whole lexical process should be reworked. xoxorich. */ | |
1181 | if (ch == '/') | |
1182 | { | |
1183 | ch2 = GET (); | |
1184 | if (ch2 == '*') | |
1185 | { | |
1186 | old_state = 3; | |
1187 | state = -2; | |
1188 | break; | |
1189 | } | |
1190 | else | |
1191 | { | |
1192 | UNGET (ch2); | |
1193 | } | |
204cd129 | 1194 | } |
252b5132 RH |
1195 | |
1196 | if (state == 0 || state == 1) /* Only comment at start of line. */ | |
1197 | { | |
1198 | int startch; | |
1199 | ||
1200 | startch = ch; | |
1201 | ||
1202 | do | |
1203 | { | |
1204 | ch = GET (); | |
1205 | } | |
1206 | while (ch != EOF && IS_WHITESPACE (ch)); | |
204cd129 | 1207 | |
252b5132 RH |
1208 | if (ch == EOF) |
1209 | { | |
1210 | as_warn (_("end of file in comment; newline inserted")); | |
1211 | PUT ('\n'); | |
1212 | break; | |
1213 | } | |
204cd129 | 1214 | |
252b5132 RH |
1215 | if (ch < '0' || ch > '9' || state != 0 || startch != '#') |
1216 | { | |
1217 | /* Not a cpp line. */ | |
1218 | while (ch != EOF && !IS_NEWLINE (ch)) | |
1219 | ch = GET (); | |
1220 | if (ch == EOF) | |
cf3f45fa AM |
1221 | { |
1222 | as_warn (_("end of file in comment; newline inserted")); | |
1223 | PUT ('\n'); | |
1224 | } | |
1225 | else /* IS_NEWLINE (ch) */ | |
1226 | { | |
1227 | /* To process non-zero add_newlines. */ | |
1228 | UNGET (ch); | |
1229 | } | |
252b5132 | 1230 | state = 0; |
252b5132 RH |
1231 | break; |
1232 | } | |
3ee4defc | 1233 | /* Looks like `# 123 "filename"' from cpp. */ |
252b5132 RH |
1234 | UNGET (ch); |
1235 | old_state = 4; | |
1236 | state = -1; | |
1237 | if (scrub_m68k_mri) | |
93e914b2 | 1238 | out_string = "\tlinefile "; |
252b5132 | 1239 | else |
93e914b2 | 1240 | out_string = "\t.linefile "; |
252b5132 RH |
1241 | PUT (*out_string++); |
1242 | break; | |
1243 | } | |
1244 | ||
1245 | #ifdef TC_D10V | |
1246 | /* All insns end in a char for which LEX_IS_SYMBOL_COMPONENT is true. | |
1247 | Trap is the only short insn that has a first operand that is | |
1248 | neither register nor label. | |
1249 | We must prevent exef0f ||trap #1 to degenerate to exef0f ||trap#1 . | |
30a2b4ef KH |
1250 | We can't make '#' LEX_IS_SYMBOL_COMPONENT because it is |
1251 | already LEX_IS_LINE_COMMENT_START. However, it is the | |
1252 | only character in line_comment_chars for d10v, hence we | |
1253 | can recognize it as such. */ | |
252b5132 RH |
1254 | /* An alternative approach would be to reset the state to 1 when |
1255 | we see '||', '<'- or '->', but that seems to be overkill. */ | |
30a2b4ef KH |
1256 | if (state == 10) |
1257 | PUT (' '); | |
252b5132 RH |
1258 | #endif |
1259 | /* We have a line comment character which is not at the | |
1260 | start of a line. If this is also a normal comment | |
1261 | character, fall through. Otherwise treat it as a default | |
1262 | character. */ | |
1263 | if (strchr (tc_comment_chars, ch) == NULL | |
1264 | && (! scrub_m68k_mri | |
1265 | || (ch != '!' && ch != '*'))) | |
1266 | goto de_fault; | |
1267 | if (scrub_m68k_mri | |
1268 | && (ch == '!' || ch == '*' || ch == '#') | |
1269 | && state != 1 | |
1270 | && state != 10) | |
1271 | goto de_fault; | |
1272 | /* Fall through. */ | |
1273 | case LEX_IS_COMMENT_START: | |
1274 | #if defined TC_ARM && defined OBJ_ELF | |
1275 | /* On the ARM, `@' is the comment character. | |
1276 | Unfortunately this is also a special character in ELF .symver | |
30a2b4ef KH |
1277 | directives (and .type, though we deal with those another way). |
1278 | So we check if this line is such a directive, and treat | |
1279 | the character as default if so. This is a hack. */ | |
252b5132 RH |
1280 | if ((symver_state != NULL) && (*symver_state == 0)) |
1281 | goto de_fault; | |
4c400d5e | 1282 | #endif |
2a676888 MS |
1283 | |
1284 | #ifdef TC_ARM | |
1285 | /* For the ARM, care is needed not to damage occurrences of \@ | |
1286 | by stripping the @ onwards. Yuck. */ | |
1287 | if (to > tostart && *(to - 1) == '\\') | |
1288 | /* Do not treat the @ as a start-of-comment. */ | |
1289 | goto de_fault; | |
1290 | #endif | |
1291 | ||
4c400d5e AM |
1292 | #ifdef WARN_COMMENTS |
1293 | if (!found_comment) | |
1294 | as_where (&found_comment_file, &found_comment); | |
252b5132 RH |
1295 | #endif |
1296 | do | |
1297 | { | |
1298 | ch = GET (); | |
1299 | } | |
1300 | while (ch != EOF && !IS_NEWLINE (ch)); | |
1301 | if (ch == EOF) | |
1302 | as_warn (_("end of file in comment; newline inserted")); | |
1303 | state = 0; | |
1304 | PUT ('\n'); | |
1305 | break; | |
1306 | ||
c54b5932 DD |
1307 | #ifdef H_TICK_HEX |
1308 | case LEX_IS_H: | |
1309 | /* Look for strings like H'[0-9A-Fa-f] and if found, replace | |
1310 | the H' with 0x to make them gas-style hex characters. */ | |
1311 | if (enable_h_tick_hex) | |
1312 | { | |
1313 | char quot; | |
1314 | ||
1315 | quot = GET (); | |
1316 | if (quot == '\'') | |
1317 | { | |
1318 | UNGET ('x'); | |
1319 | ch = '0'; | |
1320 | } | |
1321 | else | |
1322 | UNGET (quot); | |
1323 | } | |
1324 | /* FALL THROUGH */ | |
1325 | #endif | |
1326 | ||
252b5132 RH |
1327 | case LEX_IS_SYMBOL_COMPONENT: |
1328 | if (state == 10) | |
1329 | { | |
1330 | /* This is a symbol character following another symbol | |
1331 | character, with whitespace in between. We skipped | |
1332 | the whitespace earlier, so output it now. */ | |
1333 | UNGET (ch); | |
1334 | state = 3; | |
1335 | PUT (' '); | |
1336 | break; | |
1337 | } | |
1338 | ||
3c9b82ba NC |
1339 | #ifdef TC_Z80 |
1340 | /* "af'" is a symbol containing '\''. */ | |
34bca508 | 1341 | if (state == 3 && (ch == 'a' || ch == 'A')) |
3c9b82ba NC |
1342 | { |
1343 | state = 16; | |
1344 | PUT (ch); | |
1345 | ch = GET (); | |
34bca508 | 1346 | if (ch == 'f' || ch == 'F') |
3c9b82ba NC |
1347 | { |
1348 | state = 17; | |
1349 | PUT (ch); | |
1350 | break; | |
1351 | } | |
1352 | else | |
1353 | { | |
1354 | state = 9; | |
536695d0 | 1355 | if (ch == EOF || !IS_SYMBOL_COMPONENT (ch)) |
3c9b82ba | 1356 | { |
0146fc9d NC |
1357 | if (ch != EOF) |
1358 | UNGET (ch); | |
3c9b82ba NC |
1359 | break; |
1360 | } | |
1361 | } | |
1362 | } | |
1363 | #endif | |
252b5132 RH |
1364 | if (state == 3) |
1365 | state = 9; | |
1366 | ||
1367 | /* This is a common case. Quickly copy CH and all the | |
b1ac4c66 | 1368 | following symbol component or normal characters. */ |
252b5132 RH |
1369 | if (to + 1 < toend |
1370 | && mri_state == NULL | |
1371 | #if defined TC_ARM && defined OBJ_ELF | |
1372 | && symver_state == NULL | |
1373 | #endif | |
1374 | ) | |
1375 | { | |
1376 | char *s; | |
39a45edc | 1377 | ptrdiff_t len; |
252b5132 RH |
1378 | |
1379 | for (s = from; s < fromend; s++) | |
1380 | { | |
1381 | int type; | |
1382 | ||
30a2b4ef | 1383 | ch2 = *(unsigned char *) s; |
252b5132 RH |
1384 | type = lex[ch2]; |
1385 | if (type != 0 | |
1386 | && type != LEX_IS_SYMBOL_COMPONENT) | |
1387 | break; | |
1388 | } | |
204cd129 | 1389 | |
252b5132 | 1390 | if (s > from) |
204cd129 NC |
1391 | /* Handle the last character normally, for |
1392 | simplicity. */ | |
1393 | --s; | |
1394 | ||
252b5132 | 1395 | len = s - from; |
204cd129 | 1396 | |
252b5132 RH |
1397 | if (len > (toend - to) - 1) |
1398 | len = (toend - to) - 1; | |
204cd129 | 1399 | |
252b5132 RH |
1400 | if (len > 0) |
1401 | { | |
1402 | PUT (ch); | |
518051dc BE |
1403 | memcpy (to, from, len); |
1404 | to += len; | |
1405 | from += len; | |
37b75c0c AM |
1406 | if (to >= toend) |
1407 | goto tofull; | |
252b5132 RH |
1408 | ch = GET (); |
1409 | } | |
1410 | } | |
1411 | ||
1412 | /* Fall through. */ | |
1413 | default: | |
1414 | de_fault: | |
1415 | /* Some relatively `normal' character. */ | |
1416 | if (state == 0) | |
1417 | { | |
9a124774 | 1418 | state = 11; /* Now seeing label definition. */ |
252b5132 RH |
1419 | } |
1420 | else if (state == 1) | |
1421 | { | |
9a124774 | 1422 | state = 2; /* Ditto. */ |
252b5132 RH |
1423 | } |
1424 | else if (state == 9) | |
1425 | { | |
2cdb18a7 | 1426 | if (!IS_SYMBOL_COMPONENT (ch)) |
252b5132 RH |
1427 | state = 3; |
1428 | } | |
1429 | else if (state == 10) | |
1430 | { | |
c5c834aa AH |
1431 | if (ch == '\\') |
1432 | { | |
1433 | /* Special handling for backslash: a backslash may | |
1434 | be the beginning of a formal parameter (of a | |
1435 | macro) following another symbol character, with | |
1436 | whitespace in between. If that is the case, we | |
1437 | output a space before the parameter. Strictly | |
1438 | speaking, correct handling depends upon what the | |
1439 | macro parameter expands into; if the parameter | |
1440 | expands into something which does not start with | |
1441 | an operand character, then we don't want to keep | |
1442 | the space. We don't have enough information to | |
1443 | make the right choice, so here we are making the | |
1444 | choice which is more likely to be correct. */ | |
1740b7b1 NS |
1445 | if (to + 1 >= toend) |
1446 | { | |
1447 | /* If we're near the end of the buffer, save the | |
1448 | character for the next time round. Otherwise | |
1449 | we'll lose our state. */ | |
1450 | UNGET (ch); | |
1451 | goto tofull; | |
1452 | } | |
1453 | *to++ = ' '; | |
c5c834aa AH |
1454 | } |
1455 | ||
252b5132 RH |
1456 | state = 3; |
1457 | } | |
1458 | PUT (ch); | |
1459 | break; | |
1460 | } | |
1461 | } | |
1462 | ||
1463 | /*NOTREACHED*/ | |
1464 | ||
1465 | fromeof: | |
1466 | /* We have reached the end of the input. */ | |
1467 | return to - tostart; | |
1468 | ||
1469 | tofull: | |
1470 | /* The output buffer is full. Save any input we have not yet | |
1471 | processed. */ | |
1472 | if (fromend > from) | |
1473 | { | |
2b47531b | 1474 | saved_input = from; |
252b5132 RH |
1475 | saved_input_len = fromend - from; |
1476 | } | |
1477 | else | |
2b47531b ILT |
1478 | saved_input = NULL; |
1479 | ||
252b5132 RH |
1480 | return to - tostart; |
1481 | } |