Commit | Line | Data |
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252b5132 | 1 | /* This is the Assembler Pre-Processor |
b3adc24a | 2 | Copyright (C) 1987-2020 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 | |
ab1fadc6 AM |
58 | #ifdef TC_ARM |
59 | static char last_char; | |
60 | #endif | |
252b5132 RH |
61 | |
62 | static char lex[256]; | |
63 | static const char symbol_chars[] = | |
64 | "$._ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; | |
65 | ||
66 | #define LEX_IS_SYMBOL_COMPONENT 1 | |
67 | #define LEX_IS_WHITESPACE 2 | |
68 | #define LEX_IS_LINE_SEPARATOR 3 | |
69 | #define LEX_IS_COMMENT_START 4 | |
70 | #define LEX_IS_LINE_COMMENT_START 5 | |
71 | #define LEX_IS_TWOCHAR_COMMENT_1ST 6 | |
72 | #define LEX_IS_STRINGQUOTE 8 | |
73 | #define LEX_IS_COLON 9 | |
74 | #define LEX_IS_NEWLINE 10 | |
75 | #define LEX_IS_ONECHAR_QUOTE 11 | |
76 | #ifdef TC_V850 | |
77 | #define LEX_IS_DOUBLEDASH_1ST 12 | |
78 | #endif | |
79 | #ifdef TC_M32R | |
f28e8eb3 TW |
80 | #define DOUBLEBAR_PARALLEL |
81 | #endif | |
82 | #ifdef DOUBLEBAR_PARALLEL | |
252b5132 RH |
83 | #define LEX_IS_DOUBLEBAR_1ST 13 |
84 | #endif | |
62f65a7b | 85 | #define LEX_IS_PARALLEL_SEPARATOR 14 |
c54b5932 DD |
86 | #ifdef H_TICK_HEX |
87 | #define LEX_IS_H 15 | |
88 | #endif | |
252b5132 RH |
89 | #define IS_SYMBOL_COMPONENT(c) (lex[c] == LEX_IS_SYMBOL_COMPONENT) |
90 | #define IS_WHITESPACE(c) (lex[c] == LEX_IS_WHITESPACE) | |
91 | #define IS_LINE_SEPARATOR(c) (lex[c] == LEX_IS_LINE_SEPARATOR) | |
62f65a7b | 92 | #define IS_PARALLEL_SEPARATOR(c) (lex[c] == LEX_IS_PARALLEL_SEPARATOR) |
252b5132 RH |
93 | #define IS_COMMENT(c) (lex[c] == LEX_IS_COMMENT_START) |
94 | #define IS_LINE_COMMENT(c) (lex[c] == LEX_IS_LINE_COMMENT_START) | |
95 | #define IS_NEWLINE(c) (lex[c] == LEX_IS_NEWLINE) | |
96 | ||
73ee5e4c | 97 | static int process_escape (int); |
252b5132 RH |
98 | |
99 | /* FIXME-soon: The entire lexer/parser thingy should be | |
100 | built statically at compile time rather than dynamically | |
3ee4defc | 101 | each and every time the assembler is run. xoxorich. */ |
252b5132 | 102 | |
3ee4defc | 103 | void |
73ee5e4c | 104 | do_scrub_begin (int m68k_mri ATTRIBUTE_UNUSED) |
252b5132 RH |
105 | { |
106 | const char *p; | |
107 | int c; | |
108 | ||
252b5132 RH |
109 | lex[' '] = LEX_IS_WHITESPACE; |
110 | lex['\t'] = LEX_IS_WHITESPACE; | |
111 | lex['\r'] = LEX_IS_WHITESPACE; | |
112 | lex['\n'] = LEX_IS_NEWLINE; | |
252b5132 RH |
113 | lex[':'] = LEX_IS_COLON; |
114 | ||
abd63a32 AM |
115 | #ifdef TC_M68K |
116 | scrub_m68k_mri = m68k_mri; | |
117 | ||
252b5132 | 118 | if (! m68k_mri) |
abd63a32 | 119 | #endif |
252b5132 RH |
120 | { |
121 | lex['"'] = LEX_IS_STRINGQUOTE; | |
122 | ||
6793974d | 123 | #if ! defined (TC_HPPA) |
252b5132 RH |
124 | lex['\''] = LEX_IS_ONECHAR_QUOTE; |
125 | #endif | |
126 | ||
127 | #ifdef SINGLE_QUOTE_STRINGS | |
128 | lex['\''] = LEX_IS_STRINGQUOTE; | |
129 | #endif | |
130 | } | |
131 | ||
132 | /* Note: if any other character can be LEX_IS_STRINGQUOTE, the loop | |
133 | in state 5 of do_scrub_chars must be changed. */ | |
134 | ||
135 | /* Note that these override the previous defaults, e.g. if ';' is a | |
136 | comment char, then it isn't a line separator. */ | |
137 | for (p = symbol_chars; *p; ++p) | |
204cd129 | 138 | lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT; |
252b5132 RH |
139 | |
140 | for (c = 128; c < 256; ++c) | |
141 | lex[c] = LEX_IS_SYMBOL_COMPONENT; | |
142 | ||
143 | #ifdef tc_symbol_chars | |
144 | /* This macro permits the processor to specify all characters which | |
145 | may appears in an operand. This will prevent the scrubber from | |
146 | discarding meaningful whitespace in certain cases. The i386 | |
147 | backend uses this to support prefixes, which can confuse the | |
148 | scrubber as to whether it is parsing operands or opcodes. */ | |
149 | for (p = tc_symbol_chars; *p; ++p) | |
150 | lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT; | |
151 | #endif | |
152 | ||
153 | /* The m68k backend wants to be able to change comment_chars. */ | |
154 | #ifndef tc_comment_chars | |
155 | #define tc_comment_chars comment_chars | |
156 | #endif | |
157 | for (p = tc_comment_chars; *p; p++) | |
204cd129 | 158 | lex[(unsigned char) *p] = LEX_IS_COMMENT_START; |
252b5132 RH |
159 | |
160 | for (p = line_comment_chars; *p; p++) | |
204cd129 | 161 | lex[(unsigned char) *p] = LEX_IS_LINE_COMMENT_START; |
252b5132 | 162 | |
2e6976a8 DG |
163 | #ifndef tc_line_separator_chars |
164 | #define tc_line_separator_chars line_separator_chars | |
165 | #endif | |
166 | for (p = tc_line_separator_chars; *p; p++) | |
204cd129 | 167 | lex[(unsigned char) *p] = LEX_IS_LINE_SEPARATOR; |
252b5132 | 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++) | |
204cd129 | 173 | lex[(unsigned char) *p] = LEX_IS_PARALLEL_SEPARATOR; |
62f65a7b DB |
174 | #endif |
175 | ||
252b5132 RH |
176 | /* Only allow slash-star comments if slash is not in use. |
177 | FIXME: This isn't right. We should always permit them. */ | |
178 | if (lex['/'] == 0) | |
204cd129 | 179 | lex['/'] = LEX_IS_TWOCHAR_COMMENT_1ST; |
252b5132 | 180 | |
abd63a32 | 181 | #ifdef TC_M68K |
252b5132 RH |
182 | if (m68k_mri) |
183 | { | |
184 | lex['\''] = LEX_IS_STRINGQUOTE; | |
185 | lex[';'] = LEX_IS_COMMENT_START; | |
186 | lex['*'] = LEX_IS_LINE_COMMENT_START; | |
187 | /* The MRI documentation says '!' is LEX_IS_COMMENT_START, but | |
b1ac4c66 | 188 | then it can't be used in an expression. */ |
252b5132 RH |
189 | lex['!'] = LEX_IS_LINE_COMMENT_START; |
190 | } | |
abd63a32 | 191 | #endif |
252b5132 RH |
192 | |
193 | #ifdef TC_V850 | |
194 | lex['-'] = LEX_IS_DOUBLEDASH_1ST; | |
195 | #endif | |
f28e8eb3 | 196 | #ifdef DOUBLEBAR_PARALLEL |
252b5132 RH |
197 | lex['|'] = LEX_IS_DOUBLEBAR_1ST; |
198 | #endif | |
199 | #ifdef TC_D30V | |
204cd129 | 200 | /* Must do this is we want VLIW instruction with "->" or "<-". */ |
252b5132 RH |
201 | lex['-'] = LEX_IS_SYMBOL_COMPONENT; |
202 | #endif | |
c54b5932 DD |
203 | |
204 | #ifdef H_TICK_HEX | |
205 | if (enable_h_tick_hex) | |
206 | { | |
207 | lex['h'] = LEX_IS_H; | |
208 | lex['H'] = LEX_IS_H; | |
209 | } | |
210 | #endif | |
204cd129 | 211 | } |
252b5132 | 212 | |
204cd129 | 213 | /* Saved state of the scrubber. */ |
252b5132 RH |
214 | static int state; |
215 | static int old_state; | |
cd0bbe6e | 216 | static const char *out_string; |
252b5132 RH |
217 | static char out_buf[20]; |
218 | static int add_newlines; | |
219 | static char *saved_input; | |
39a45edc | 220 | static size_t saved_input_len; |
2b47531b | 221 | static char input_buffer[32 * 1024]; |
252b5132 RH |
222 | static const char *mri_state; |
223 | static char mri_last_ch; | |
224 | ||
225 | /* Data structure for saving the state of app across #include's. Note that | |
226 | app is called asynchronously to the parsing of the .include's, so our | |
227 | state at the time .include is interpreted is completely unrelated. | |
228 | That's why we have to save it all. */ | |
229 | ||
204cd129 NC |
230 | struct app_save |
231 | { | |
30a2b4ef KH |
232 | int state; |
233 | int old_state; | |
cd0bbe6e | 234 | const char * out_string; |
30a2b4ef KH |
235 | char out_buf[sizeof (out_buf)]; |
236 | int add_newlines; | |
237 | char * saved_input; | |
39a45edc | 238 | size_t saved_input_len; |
abd63a32 | 239 | #ifdef TC_M68K |
30a2b4ef | 240 | int scrub_m68k_mri; |
abd63a32 | 241 | #endif |
30a2b4ef KH |
242 | const char * mri_state; |
243 | char mri_last_ch; | |
252b5132 | 244 | #if defined TC_ARM && defined OBJ_ELF |
30a2b4ef | 245 | const char * symver_state; |
252b5132 | 246 | #endif |
ab1fadc6 AM |
247 | #ifdef TC_ARM |
248 | char last_char; | |
249 | #endif | |
30a2b4ef | 250 | }; |
252b5132 RH |
251 | |
252 | char * | |
73ee5e4c | 253 | app_push (void) |
252b5132 | 254 | { |
ed9e98c2 | 255 | struct app_save *saved; |
252b5132 | 256 | |
325801bd | 257 | saved = XNEW (struct app_save); |
252b5132 RH |
258 | saved->state = state; |
259 | saved->old_state = old_state; | |
260 | saved->out_string = out_string; | |
261 | memcpy (saved->out_buf, out_buf, sizeof (out_buf)); | |
262 | saved->add_newlines = add_newlines; | |
2b47531b ILT |
263 | if (saved_input == NULL) |
264 | saved->saved_input = NULL; | |
265 | else | |
266 | { | |
add39d23 | 267 | saved->saved_input = XNEWVEC (char, saved_input_len); |
2b47531b ILT |
268 | memcpy (saved->saved_input, saved_input, saved_input_len); |
269 | saved->saved_input_len = saved_input_len; | |
270 | } | |
abd63a32 | 271 | #ifdef TC_M68K |
252b5132 | 272 | saved->scrub_m68k_mri = scrub_m68k_mri; |
abd63a32 | 273 | #endif |
252b5132 RH |
274 | saved->mri_state = mri_state; |
275 | saved->mri_last_ch = mri_last_ch; | |
276 | #if defined TC_ARM && defined OBJ_ELF | |
277 | saved->symver_state = symver_state; | |
278 | #endif | |
ab1fadc6 AM |
279 | #ifdef TC_ARM |
280 | saved->last_char = last_char; | |
281 | #endif | |
252b5132 | 282 | |
3ee4defc | 283 | /* do_scrub_begin() is not useful, just wastes time. */ |
252b5132 RH |
284 | |
285 | state = 0; | |
286 | saved_input = NULL; | |
f8819316 | 287 | add_newlines = 0; |
252b5132 RH |
288 | |
289 | return (char *) saved; | |
290 | } | |
291 | ||
3ee4defc | 292 | void |
73ee5e4c | 293 | app_pop (char *arg) |
252b5132 | 294 | { |
ed9e98c2 | 295 | struct app_save *saved = (struct app_save *) arg; |
252b5132 | 296 | |
3ee4defc | 297 | /* There is no do_scrub_end (). */ |
252b5132 RH |
298 | state = saved->state; |
299 | old_state = saved->old_state; | |
300 | out_string = saved->out_string; | |
301 | memcpy (out_buf, saved->out_buf, sizeof (out_buf)); | |
302 | add_newlines = saved->add_newlines; | |
2b47531b ILT |
303 | if (saved->saved_input == NULL) |
304 | saved_input = NULL; | |
305 | else | |
306 | { | |
39a45edc | 307 | gas_assert (saved->saved_input_len <= sizeof (input_buffer)); |
2b47531b ILT |
308 | memcpy (input_buffer, saved->saved_input, saved->saved_input_len); |
309 | saved_input = input_buffer; | |
310 | saved_input_len = saved->saved_input_len; | |
311 | free (saved->saved_input); | |
312 | } | |
abd63a32 | 313 | #ifdef TC_M68K |
252b5132 | 314 | scrub_m68k_mri = saved->scrub_m68k_mri; |
abd63a32 | 315 | #endif |
252b5132 RH |
316 | mri_state = saved->mri_state; |
317 | mri_last_ch = saved->mri_last_ch; | |
318 | #if defined TC_ARM && defined OBJ_ELF | |
319 | symver_state = saved->symver_state; | |
320 | #endif | |
ab1fadc6 AM |
321 | #ifdef TC_ARM |
322 | last_char = saved->last_char; | |
323 | #endif | |
252b5132 RH |
324 | |
325 | free (arg); | |
204cd129 | 326 | } |
252b5132 RH |
327 | |
328 | /* @@ This assumes that \n &c are the same on host and target. This is not | |
329 | necessarily true. */ | |
204cd129 | 330 | |
3ee4defc | 331 | static int |
73ee5e4c | 332 | process_escape (int ch) |
252b5132 RH |
333 | { |
334 | switch (ch) | |
335 | { | |
336 | case 'b': | |
337 | return '\b'; | |
338 | case 'f': | |
339 | return '\f'; | |
340 | case 'n': | |
341 | return '\n'; | |
342 | case 'r': | |
343 | return '\r'; | |
344 | case 't': | |
345 | return '\t'; | |
346 | case '\'': | |
347 | return '\''; | |
348 | case '"': | |
349 | return '\"'; | |
350 | default: | |
351 | return ch; | |
352 | } | |
353 | } | |
354 | ||
355 | /* This function is called to process input characters. The GET | |
356 | parameter is used to retrieve more input characters. GET should | |
357 | set its parameter to point to a buffer, and return the length of | |
358 | the buffer; it should return 0 at end of file. The scrubbed output | |
359 | characters are put into the buffer starting at TOSTART; the TOSTART | |
360 | buffer is TOLEN bytes in length. The function returns the number | |
361 | of scrubbed characters put into TOSTART. This will be TOLEN unless | |
362 | end of file was seen. This function is arranged as a state | |
363 | machine, and saves its state so that it may return at any point. | |
364 | This is the way the old code used to work. */ | |
365 | ||
39a45edc AM |
366 | size_t |
367 | do_scrub_chars (size_t (*get) (char *, size_t), char *tostart, size_t tolen) | |
252b5132 RH |
368 | { |
369 | char *to = tostart; | |
370 | char *toend = tostart + tolen; | |
371 | char *from; | |
372 | char *fromend; | |
39a45edc | 373 | size_t fromlen; |
ed9e98c2 | 374 | int ch, ch2 = 0; |
c9c5dcda AM |
375 | /* Character that started the string we're working on. */ |
376 | static char quotechar; | |
252b5132 RH |
377 | |
378 | /*State 0: beginning of normal line | |
379 | 1: After first whitespace on line (flush more white) | |
380 | 2: After first non-white (opcode) on line (keep 1white) | |
381 | 3: after second white on line (into operands) (flush white) | |
93e914b2 | 382 | 4: after putting out a .linefile, put out digits |
252b5132 RH |
383 | 5: parsing a string, then go to old-state |
384 | 6: putting out \ escape in a "d string. | |
93e914b2 | 385 | 7: no longer used |
e9fc6c21 | 386 | 8: no longer used |
252b5132 RH |
387 | 9: After seeing symbol char in state 3 (keep 1white after symchar) |
388 | 10: After seeing whitespace in state 9 (keep white before symchar) | |
389 | 11: After seeing a symbol character in state 0 (eg a label definition) | |
390 | -1: output string in out_string and go to the state in old_state | |
391 | -2: flush text until a '*' '/' is seen, then go to state old_state | |
392 | #ifdef TC_V850 | |
b1ac4c66 AM |
393 | 12: After seeing a dash, looking for a second dash as a start |
394 | of comment. | |
252b5132 | 395 | #endif |
f28e8eb3 | 396 | #ifdef DOUBLEBAR_PARALLEL |
b1ac4c66 AM |
397 | 13: After seeing a vertical bar, looking for a second |
398 | vertical bar as a parallel expression separator. | |
52628315 | 399 | #endif |
40b36596 JM |
400 | #ifdef TC_PREDICATE_START_CHAR |
401 | 14: After seeing a predicate start character at state 0, looking | |
402 | for a predicate end character as predicate. | |
403 | 15: After seeing a predicate start character at state 1, looking | |
404 | for a predicate end character as predicate. | |
3c9b82ba NC |
405 | #endif |
406 | #ifdef TC_Z80 | |
407 | 16: After seeing an 'a' or an 'A' at the start of a symbol | |
408 | 17: After seeing an 'f' or an 'F' in state 16 | |
252b5132 RH |
409 | #endif |
410 | */ | |
411 | ||
412 | /* I added states 9 and 10 because the MIPS ECOFF assembler uses | |
413 | constructs like ``.loc 1 20''. This was turning into ``.loc | |
414 | 120''. States 9 and 10 ensure that a space is never dropped in | |
3b37fd66 | 415 | between characters which could appear in an identifier. Ian |
252b5132 RH |
416 | Taylor, ian@cygnus.com. |
417 | ||
418 | I added state 11 so that something like "Lfoo add %r25,%r26,%r27" works | |
419 | correctly on the PA (and any other target where colons are optional). | |
420 | Jeff Law, law@cs.utah.edu. | |
421 | ||
422 | I added state 13 so that something like "cmp r1, r2 || trap #1" does not | |
423 | get squashed into "cmp r1,r2||trap#1", with the all important space | |
424 | between the 'trap' and the '#1' being eliminated. nickc@cygnus.com */ | |
425 | ||
426 | /* This macro gets the next input character. */ | |
427 | ||
2b47531b ILT |
428 | #define GET() \ |
429 | (from < fromend \ | |
430 | ? * (unsigned char *) (from++) \ | |
431 | : (saved_input = NULL, \ | |
432 | fromlen = (*get) (input_buffer, sizeof input_buffer), \ | |
433 | from = input_buffer, \ | |
434 | fromend = from + fromlen, \ | |
435 | (fromlen == 0 \ | |
436 | ? EOF \ | |
252b5132 RH |
437 | : * (unsigned char *) (from++)))) |
438 | ||
439 | /* This macro pushes a character back on the input stream. */ | |
440 | ||
441 | #define UNGET(uch) (*--from = (uch)) | |
442 | ||
443 | /* This macro puts a character into the output buffer. If this | |
444 | character fills the output buffer, this macro jumps to the label | |
445 | TOFULL. We use this rather ugly approach because we need to | |
446 | handle two different termination conditions: EOF on the input | |
447 | stream, and a full output buffer. It would be simpler if we | |
448 | always read in the entire input stream before processing it, but | |
449 | I don't want to make such a significant change to the assembler's | |
450 | memory usage. */ | |
451 | ||
411863a4 KH |
452 | #define PUT(pch) \ |
453 | do \ | |
454 | { \ | |
455 | *to++ = (pch); \ | |
456 | if (to >= toend) \ | |
457 | goto tofull; \ | |
458 | } \ | |
252b5132 RH |
459 | while (0) |
460 | ||
461 | if (saved_input != NULL) | |
462 | { | |
463 | from = saved_input; | |
464 | fromend = from + saved_input_len; | |
465 | } | |
466 | else | |
467 | { | |
2b47531b | 468 | fromlen = (*get) (input_buffer, sizeof input_buffer); |
252b5132 RH |
469 | if (fromlen == 0) |
470 | return 0; | |
2b47531b | 471 | from = input_buffer; |
252b5132 RH |
472 | fromend = from + fromlen; |
473 | } | |
474 | ||
475 | while (1) | |
476 | { | |
477 | /* The cases in this switch end with continue, in order to | |
b1ac4c66 AM |
478 | branch back to the top of this while loop and generate the |
479 | next output character in the appropriate state. */ | |
252b5132 RH |
480 | switch (state) |
481 | { | |
482 | case -1: | |
483 | ch = *out_string++; | |
484 | if (*out_string == '\0') | |
485 | { | |
486 | state = old_state; | |
487 | old_state = 3; | |
488 | } | |
489 | PUT (ch); | |
490 | continue; | |
491 | ||
492 | case -2: | |
493 | for (;;) | |
494 | { | |
495 | do | |
496 | { | |
497 | ch = GET (); | |
498 | ||
499 | if (ch == EOF) | |
500 | { | |
501 | as_warn (_("end of file in comment")); | |
502 | goto fromeof; | |
503 | } | |
504 | ||
505 | if (ch == '\n') | |
506 | PUT ('\n'); | |
507 | } | |
508 | while (ch != '*'); | |
509 | ||
510 | while ((ch = GET ()) == '*') | |
511 | ; | |
512 | ||
513 | if (ch == EOF) | |
514 | { | |
515 | as_warn (_("end of file in comment")); | |
516 | goto fromeof; | |
517 | } | |
518 | ||
519 | if (ch == '/') | |
520 | break; | |
521 | ||
522 | UNGET (ch); | |
523 | } | |
524 | ||
525 | state = old_state; | |
526 | UNGET (' '); | |
527 | continue; | |
528 | ||
529 | case 4: | |
530 | ch = GET (); | |
531 | if (ch == EOF) | |
532 | goto fromeof; | |
533 | else if (ch >= '0' && ch <= '9') | |
534 | PUT (ch); | |
535 | else | |
536 | { | |
537 | while (ch != EOF && IS_WHITESPACE (ch)) | |
538 | ch = GET (); | |
539 | if (ch == '"') | |
540 | { | |
93e914b2 AO |
541 | quotechar = ch; |
542 | state = 5; | |
e9fc6c21 | 543 | old_state = 3; |
4061927e | 544 | PUT (ch); |
252b5132 RH |
545 | } |
546 | else | |
547 | { | |
548 | while (ch != EOF && ch != '\n') | |
549 | ch = GET (); | |
550 | state = 0; | |
551 | PUT (ch); | |
552 | } | |
553 | } | |
554 | continue; | |
555 | ||
556 | case 5: | |
557 | /* We are going to copy everything up to a quote character, | |
b1ac4c66 AM |
558 | with special handling for a backslash. We try to |
559 | optimize the copying in the simple case without using the | |
560 | GET and PUT macros. */ | |
252b5132 RH |
561 | { |
562 | char *s; | |
39a45edc | 563 | ptrdiff_t len; |
252b5132 RH |
564 | |
565 | for (s = from; s < fromend; s++) | |
566 | { | |
567 | ch = *s; | |
252b5132 | 568 | if (ch == '\\' |
c9c5dcda | 569 | || ch == quotechar |
252b5132 RH |
570 | || ch == '\n') |
571 | break; | |
572 | } | |
573 | len = s - from; | |
574 | if (len > toend - to) | |
575 | len = toend - to; | |
576 | if (len > 0) | |
577 | { | |
578 | memcpy (to, from, len); | |
579 | to += len; | |
580 | from += len; | |
df816087 AM |
581 | if (to >= toend) |
582 | goto tofull; | |
252b5132 RH |
583 | } |
584 | } | |
585 | ||
586 | ch = GET (); | |
587 | if (ch == EOF) | |
588 | { | |
fc5910c0 NC |
589 | /* This buffer is here specifically so |
590 | that the UNGET below will work. */ | |
591 | static char one_char_buf[1]; | |
592 | ||
c9c5dcda | 593 | as_warn (_("end of file in string; '%c' inserted"), quotechar); |
252b5132 | 594 | state = old_state; |
fc5910c0 NC |
595 | from = fromend = one_char_buf + 1; |
596 | fromlen = 1; | |
252b5132 | 597 | UNGET ('\n'); |
c9c5dcda | 598 | PUT (quotechar); |
252b5132 | 599 | } |
c9c5dcda | 600 | else if (ch == quotechar) |
252b5132 RH |
601 | { |
602 | state = old_state; | |
603 | PUT (ch); | |
604 | } | |
16d87673 | 605 | else if (TC_STRING_ESCAPES && ch == '\\') |
252b5132 RH |
606 | { |
607 | state = 6; | |
608 | PUT (ch); | |
609 | } | |
252b5132 RH |
610 | else if (scrub_m68k_mri && ch == '\n') |
611 | { | |
612 | /* Just quietly terminate the string. This permits lines like | |
204cd129 | 613 | bne label loop if we haven't reach end yet. */ |
252b5132 RH |
614 | state = old_state; |
615 | UNGET (ch); | |
616 | PUT ('\''); | |
617 | } | |
618 | else | |
619 | { | |
620 | PUT (ch); | |
621 | } | |
622 | continue; | |
623 | ||
624 | case 6: | |
625 | state = 5; | |
626 | ch = GET (); | |
627 | switch (ch) | |
628 | { | |
629 | /* Handle strings broken across lines, by turning '\n' into | |
630 | '\\' and 'n'. */ | |
631 | case '\n': | |
632 | UNGET ('n'); | |
633 | add_newlines++; | |
634 | PUT ('\\'); | |
635 | continue; | |
636 | ||
4252e537 | 637 | case EOF: |
c9c5dcda AM |
638 | as_warn (_("end of file in string; '%c' inserted"), quotechar); |
639 | PUT (quotechar); | |
4252e537 AM |
640 | continue; |
641 | ||
252b5132 RH |
642 | case '"': |
643 | case '\\': | |
644 | case 'b': | |
645 | case 'f': | |
646 | case 'n': | |
647 | case 'r': | |
648 | case 't': | |
649 | case 'v': | |
650 | case 'x': | |
651 | case 'X': | |
652 | case '0': | |
653 | case '1': | |
654 | case '2': | |
655 | case '3': | |
656 | case '4': | |
657 | case '5': | |
658 | case '6': | |
659 | case '7': | |
660 | break; | |
4252e537 | 661 | |
252b5132 | 662 | default: |
4252e537 | 663 | #ifdef ONLY_STANDARD_ESCAPES |
0e389e77 | 664 | as_warn (_("unknown escape '\\%c' in string; ignored"), ch); |
4252e537 | 665 | #endif |
252b5132 | 666 | break; |
252b5132 RH |
667 | } |
668 | PUT (ch); | |
669 | continue; | |
670 | ||
b1ac4c66 AM |
671 | #ifdef DOUBLEBAR_PARALLEL |
672 | case 13: | |
673 | ch = GET (); | |
674 | if (ch != '|') | |
675 | abort (); | |
676 | ||
677 | /* Reset back to state 1 and pretend that we are parsing a | |
678 | line from just after the first white space. */ | |
679 | state = 1; | |
680 | PUT ('|'); | |
40b36596 JM |
681 | #ifdef TC_TIC6X |
682 | /* "||^" is used for SPMASKed instructions. */ | |
683 | ch = GET (); | |
684 | if (ch == EOF) | |
685 | goto fromeof; | |
686 | else if (ch == '^') | |
687 | PUT ('^'); | |
688 | else | |
689 | UNGET (ch); | |
690 | #endif | |
b1ac4c66 | 691 | continue; |
3c9b82ba NC |
692 | #endif |
693 | #ifdef TC_Z80 | |
694 | case 16: | |
695 | /* We have seen an 'a' at the start of a symbol, look for an 'f'. */ | |
696 | ch = GET (); | |
34bca508 | 697 | if (ch == 'f' || ch == 'F') |
3c9b82ba NC |
698 | { |
699 | state = 17; | |
700 | PUT (ch); | |
701 | } | |
702 | else | |
703 | { | |
704 | state = 9; | |
705 | break; | |
706 | } | |
1a0670f3 | 707 | /* Fall through. */ |
3c9b82ba NC |
708 | case 17: |
709 | /* We have seen "af" at the start of a symbol, | |
710 | a ' here is a part of that symbol. */ | |
711 | ch = GET (); | |
712 | state = 9; | |
713 | if (ch == '\'') | |
714 | /* Change to avoid warning about unclosed string. */ | |
715 | PUT ('`'); | |
0146fc9d | 716 | else if (ch != EOF) |
3c9b82ba NC |
717 | UNGET (ch); |
718 | break; | |
b1ac4c66 | 719 | #endif |
252b5132 RH |
720 | } |
721 | ||
204cd129 | 722 | /* OK, we are somewhere in states 0 through 4 or 9 through 11. */ |
252b5132 RH |
723 | |
724 | /* flushchar: */ | |
725 | ch = GET (); | |
726 | ||
40b36596 JM |
727 | #ifdef TC_PREDICATE_START_CHAR |
728 | if (ch == TC_PREDICATE_START_CHAR && (state == 0 || state == 1)) | |
52628315 L |
729 | { |
730 | state += 14; | |
731 | PUT (ch); | |
732 | continue; | |
733 | } | |
734 | else if (state == 14 || state == 15) | |
735 | { | |
40b36596 | 736 | if (ch == TC_PREDICATE_END_CHAR) |
70b911ad JJ |
737 | { |
738 | state -= 14; | |
739 | PUT (ch); | |
740 | ch = GET (); | |
741 | } | |
52628315 L |
742 | else |
743 | { | |
744 | PUT (ch); | |
745 | continue; | |
746 | } | |
747 | } | |
748 | #endif | |
749 | ||
252b5132 RH |
750 | recycle: |
751 | ||
752 | #if defined TC_ARM && defined OBJ_ELF | |
753 | /* We need to watch out for .symver directives. See the comment later | |
754 | in this function. */ | |
755 | if (symver_state == NULL) | |
756 | { | |
757 | if ((state == 0 || state == 1) && ch == symver_pseudo[0]) | |
758 | symver_state = symver_pseudo + 1; | |
759 | } | |
760 | else | |
761 | { | |
762 | /* We advance to the next state if we find the right | |
763 | character. */ | |
764 | if (ch != '\0' && (*symver_state == ch)) | |
765 | ++symver_state; | |
766 | else if (*symver_state != '\0') | |
767 | /* We did not get the expected character, or we didn't | |
768 | get a valid terminating character after seeing the | |
769 | entire pseudo-op, so we must go back to the beginning. */ | |
770 | symver_state = NULL; | |
771 | else | |
772 | { | |
773 | /* We've read the entire pseudo-op. If this is the end | |
774 | of the line, go back to the beginning. */ | |
775 | if (IS_NEWLINE (ch)) | |
776 | symver_state = NULL; | |
777 | } | |
778 | } | |
779 | #endif /* TC_ARM && OBJ_ELF */ | |
780 | ||
781 | #ifdef TC_M68K | |
782 | /* We want to have pseudo-ops which control whether we are in | |
b1ac4c66 AM |
783 | MRI mode or not. Unfortunately, since m68k MRI mode affects |
784 | the scrubber, that means that we need a special purpose | |
785 | recognizer here. */ | |
252b5132 RH |
786 | if (mri_state == NULL) |
787 | { | |
788 | if ((state == 0 || state == 1) | |
789 | && ch == mri_pseudo[0]) | |
790 | mri_state = mri_pseudo + 1; | |
791 | } | |
792 | else | |
793 | { | |
794 | /* We advance to the next state if we find the right | |
795 | character, or if we need a space character and we get any | |
796 | whitespace character, or if we need a '0' and we get a | |
797 | '1' (this is so that we only need one state to handle | |
798 | ``.mri 0'' and ``.mri 1''). */ | |
799 | if (ch != '\0' | |
800 | && (*mri_state == ch | |
801 | || (*mri_state == ' ' | |
802 | && lex[ch] == LEX_IS_WHITESPACE) | |
803 | || (*mri_state == '0' | |
804 | && ch == '1'))) | |
805 | { | |
806 | mri_last_ch = ch; | |
807 | ++mri_state; | |
808 | } | |
809 | else if (*mri_state != '\0' | |
810 | || (lex[ch] != LEX_IS_WHITESPACE | |
811 | && lex[ch] != LEX_IS_NEWLINE)) | |
812 | { | |
813 | /* We did not get the expected character, or we didn't | |
814 | get a valid terminating character after seeing the | |
815 | entire pseudo-op, so we must go back to the | |
816 | beginning. */ | |
817 | mri_state = NULL; | |
818 | } | |
819 | else | |
820 | { | |
821 | /* We've read the entire pseudo-op. mips_last_ch is | |
b1ac4c66 AM |
822 | either '0' or '1' indicating whether to enter or |
823 | leave MRI mode. */ | |
252b5132 RH |
824 | do_scrub_begin (mri_last_ch == '1'); |
825 | mri_state = NULL; | |
826 | ||
827 | /* We continue handling the character as usual. The | |
b1ac4c66 AM |
828 | main gas reader must also handle the .mri pseudo-op |
829 | to control expression parsing and the like. */ | |
252b5132 RH |
830 | } |
831 | } | |
832 | #endif | |
833 | ||
834 | if (ch == EOF) | |
835 | { | |
836 | if (state != 0) | |
837 | { | |
838 | as_warn (_("end of file not at end of a line; newline inserted")); | |
839 | state = 0; | |
840 | PUT ('\n'); | |
841 | } | |
842 | goto fromeof; | |
843 | } | |
844 | ||
845 | switch (lex[ch]) | |
846 | { | |
847 | case LEX_IS_WHITESPACE: | |
848 | do | |
849 | { | |
850 | ch = GET (); | |
851 | } | |
852 | while (ch != EOF && IS_WHITESPACE (ch)); | |
853 | if (ch == EOF) | |
854 | goto fromeof; | |
855 | ||
856 | if (state == 0) | |
857 | { | |
858 | /* Preserve a single whitespace character at the | |
859 | beginning of a line. */ | |
860 | state = 1; | |
861 | UNGET (ch); | |
862 | PUT (' '); | |
863 | break; | |
864 | } | |
865 | ||
f28e8eb3 | 866 | #ifdef KEEP_WHITE_AROUND_COLON |
30a2b4ef KH |
867 | if (lex[ch] == LEX_IS_COLON) |
868 | { | |
869 | /* Only keep this white if there's no white *after* the | |
b1ac4c66 | 870 | colon. */ |
30a2b4ef | 871 | ch2 = GET (); |
83bd7402 NC |
872 | if (ch2 != EOF) |
873 | UNGET (ch2); | |
30a2b4ef KH |
874 | if (!IS_WHITESPACE (ch2)) |
875 | { | |
876 | state = 9; | |
877 | UNGET (ch); | |
878 | PUT (' '); | |
879 | break; | |
880 | } | |
881 | } | |
f28e8eb3 | 882 | #endif |
252b5132 RH |
883 | if (IS_COMMENT (ch) |
884 | || ch == '/' | |
62f65a7b DB |
885 | || IS_LINE_SEPARATOR (ch) |
886 | || IS_PARALLEL_SEPARATOR (ch)) | |
252b5132 RH |
887 | { |
888 | if (scrub_m68k_mri) | |
889 | { | |
890 | /* In MRI mode, we keep these spaces. */ | |
891 | UNGET (ch); | |
892 | PUT (' '); | |
893 | break; | |
894 | } | |
895 | goto recycle; | |
896 | } | |
897 | ||
898 | /* If we're in state 2 or 11, we've seen a non-white | |
899 | character followed by whitespace. If the next character | |
900 | is ':', this is whitespace after a label name which we | |
901 | normally must ignore. In MRI mode, though, spaces are | |
902 | not permitted between the label and the colon. */ | |
903 | if ((state == 2 || state == 11) | |
904 | && lex[ch] == LEX_IS_COLON | |
905 | && ! scrub_m68k_mri) | |
906 | { | |
907 | state = 1; | |
908 | PUT (ch); | |
909 | break; | |
910 | } | |
911 | ||
912 | switch (state) | |
913 | { | |
252b5132 RH |
914 | case 1: |
915 | /* We can arrive here if we leave a leading whitespace | |
916 | character at the beginning of a line. */ | |
917 | goto recycle; | |
918 | case 2: | |
919 | state = 3; | |
920 | if (to + 1 < toend) | |
921 | { | |
922 | /* Optimize common case by skipping UNGET/GET. */ | |
923 | PUT (' '); /* Sp after opco */ | |
924 | goto recycle; | |
925 | } | |
926 | UNGET (ch); | |
927 | PUT (' '); | |
928 | break; | |
929 | case 3: | |
40b36596 JM |
930 | #ifndef TC_KEEP_OPERAND_SPACES |
931 | /* For TI C6X, we keep these spaces as they may separate | |
932 | functional unit specifiers from operands. */ | |
252b5132 | 933 | if (scrub_m68k_mri) |
40b36596 | 934 | #endif |
252b5132 RH |
935 | { |
936 | /* In MRI mode, we keep these spaces. */ | |
937 | UNGET (ch); | |
938 | PUT (' '); | |
939 | break; | |
940 | } | |
941 | goto recycle; /* Sp in operands */ | |
942 | case 9: | |
943 | case 10: | |
40b36596 | 944 | #ifndef TC_KEEP_OPERAND_SPACES |
252b5132 | 945 | if (scrub_m68k_mri) |
40b36596 | 946 | #endif |
252b5132 RH |
947 | { |
948 | /* In MRI mode, we keep these spaces. */ | |
949 | state = 3; | |
950 | UNGET (ch); | |
951 | PUT (' '); | |
952 | break; | |
953 | } | |
954 | state = 10; /* Sp after symbol char */ | |
955 | goto recycle; | |
956 | case 11: | |
abd63a32 | 957 | if (LABELS_WITHOUT_COLONS || flag_m68k_mri) |
252b5132 RH |
958 | state = 1; |
959 | else | |
960 | { | |
961 | /* We know that ch is not ':', since we tested that | |
b1ac4c66 AM |
962 | case above. Therefore this is not a label, so it |
963 | must be the opcode, and we've just seen the | |
964 | whitespace after it. */ | |
252b5132 RH |
965 | state = 3; |
966 | } | |
967 | UNGET (ch); | |
968 | PUT (' '); /* Sp after label definition. */ | |
969 | break; | |
970 | default: | |
971 | BAD_CASE (state); | |
972 | } | |
973 | break; | |
974 | ||
975 | case LEX_IS_TWOCHAR_COMMENT_1ST: | |
976 | ch2 = GET (); | |
977 | if (ch2 == '*') | |
978 | { | |
979 | for (;;) | |
980 | { | |
981 | do | |
982 | { | |
983 | ch2 = GET (); | |
984 | if (ch2 != EOF && IS_NEWLINE (ch2)) | |
985 | add_newlines++; | |
986 | } | |
987 | while (ch2 != EOF && ch2 != '*'); | |
988 | ||
989 | while (ch2 == '*') | |
990 | ch2 = GET (); | |
991 | ||
992 | if (ch2 == EOF || ch2 == '/') | |
993 | break; | |
994 | ||
995 | /* This UNGET will ensure that we count newlines | |
b1ac4c66 | 996 | correctly. */ |
252b5132 RH |
997 | UNGET (ch2); |
998 | } | |
999 | ||
1000 | if (ch2 == EOF) | |
1001 | as_warn (_("end of file in multiline comment")); | |
1002 | ||
1003 | ch = ' '; | |
1004 | goto recycle; | |
1005 | } | |
800eeca4 JW |
1006 | #ifdef DOUBLESLASH_LINE_COMMENTS |
1007 | else if (ch2 == '/') | |
1008 | { | |
1009 | do | |
1010 | { | |
1011 | ch = GET (); | |
1012 | } | |
1013 | while (ch != EOF && !IS_NEWLINE (ch)); | |
1014 | if (ch == EOF) | |
1015 | as_warn ("end of file in comment; newline inserted"); | |
1016 | state = 0; | |
1017 | PUT ('\n'); | |
1018 | break; | |
1019 | } | |
1020 | #endif | |
252b5132 RH |
1021 | else |
1022 | { | |
1023 | if (ch2 != EOF) | |
1024 | UNGET (ch2); | |
1025 | if (state == 9 || state == 10) | |
1026 | state = 3; | |
1027 | PUT (ch); | |
1028 | } | |
1029 | break; | |
1030 | ||
1031 | case LEX_IS_STRINGQUOTE: | |
c9c5dcda | 1032 | quotechar = ch; |
252b5132 RH |
1033 | if (state == 10) |
1034 | { | |
204cd129 | 1035 | /* Preserve the whitespace in foo "bar". */ |
252b5132 RH |
1036 | UNGET (ch); |
1037 | state = 3; | |
1038 | PUT (' '); | |
1039 | ||
1040 | /* PUT didn't jump out. We could just break, but we | |
b1ac4c66 | 1041 | know what will happen, so optimize a bit. */ |
252b5132 RH |
1042 | ch = GET (); |
1043 | old_state = 3; | |
1044 | } | |
1045 | else if (state == 9) | |
1046 | old_state = 3; | |
1047 | else | |
1048 | old_state = state; | |
1049 | state = 5; | |
1050 | PUT (ch); | |
1051 | break; | |
1052 | ||
252b5132 | 1053 | case LEX_IS_ONECHAR_QUOTE: |
c0a139c7 NC |
1054 | #ifdef H_TICK_HEX |
1055 | if (state == 9 && enable_h_tick_hex) | |
c54b5932 DD |
1056 | { |
1057 | char c; | |
1058 | ||
1059 | c = GET (); | |
1060 | as_warn ("'%c found after symbol", c); | |
1061 | UNGET (c); | |
1062 | } | |
c0a139c7 | 1063 | #endif |
252b5132 RH |
1064 | if (state == 10) |
1065 | { | |
204cd129 | 1066 | /* Preserve the whitespace in foo 'b'. */ |
252b5132 RH |
1067 | UNGET (ch); |
1068 | state = 3; | |
1069 | PUT (' '); | |
1070 | break; | |
1071 | } | |
1072 | ch = GET (); | |
1073 | if (ch == EOF) | |
1074 | { | |
1075 | as_warn (_("end of file after a one-character quote; \\0 inserted")); | |
1076 | ch = 0; | |
1077 | } | |
1078 | if (ch == '\\') | |
1079 | { | |
1080 | ch = GET (); | |
1081 | if (ch == EOF) | |
1082 | { | |
1083 | as_warn (_("end of file in escape character")); | |
1084 | ch = '\\'; | |
1085 | } | |
1086 | else | |
1087 | ch = process_escape (ch); | |
1088 | } | |
1089 | sprintf (out_buf, "%d", (int) (unsigned char) ch); | |
1090 | ||
1091 | /* None of these 'x constants for us. We want 'x'. */ | |
1092 | if ((ch = GET ()) != '\'') | |
1093 | { | |
1094 | #ifdef REQUIRE_CHAR_CLOSE_QUOTE | |
0e389e77 | 1095 | as_warn (_("missing close quote; (assumed)")); |
252b5132 RH |
1096 | #else |
1097 | if (ch != EOF) | |
1098 | UNGET (ch); | |
1099 | #endif | |
1100 | } | |
1101 | if (strlen (out_buf) == 1) | |
1102 | { | |
1103 | PUT (out_buf[0]); | |
1104 | break; | |
1105 | } | |
1106 | if (state == 9) | |
1107 | old_state = 3; | |
1108 | else | |
1109 | old_state = state; | |
1110 | state = -1; | |
1111 | out_string = out_buf; | |
1112 | PUT (*out_string++); | |
1113 | break; | |
252b5132 RH |
1114 | |
1115 | case LEX_IS_COLON: | |
f28e8eb3 | 1116 | #ifdef KEEP_WHITE_AROUND_COLON |
30a2b4ef | 1117 | state = 9; |
f28e8eb3 | 1118 | #else |
252b5132 RH |
1119 | if (state == 9 || state == 10) |
1120 | state = 3; | |
1121 | else if (state != 3) | |
1122 | state = 1; | |
f28e8eb3 | 1123 | #endif |
252b5132 RH |
1124 | PUT (ch); |
1125 | break; | |
1126 | ||
1127 | case LEX_IS_NEWLINE: | |
1128 | /* Roll out a bunch of newlines from inside comments, etc. */ | |
1129 | if (add_newlines) | |
1130 | { | |
1131 | --add_newlines; | |
1132 | UNGET (ch); | |
1133 | } | |
3ee4defc | 1134 | /* Fall through. */ |
252b5132 RH |
1135 | |
1136 | case LEX_IS_LINE_SEPARATOR: | |
1137 | state = 0; | |
1138 | PUT (ch); | |
1139 | break; | |
1140 | ||
62f65a7b DB |
1141 | case LEX_IS_PARALLEL_SEPARATOR: |
1142 | state = 1; | |
1143 | PUT (ch); | |
1144 | break; | |
1145 | ||
252b5132 RH |
1146 | #ifdef TC_V850 |
1147 | case LEX_IS_DOUBLEDASH_1ST: | |
30a2b4ef | 1148 | ch2 = GET (); |
252b5132 RH |
1149 | if (ch2 != '-') |
1150 | { | |
0146fc9d NC |
1151 | if (ch2 != EOF) |
1152 | UNGET (ch2); | |
252b5132 RH |
1153 | goto de_fault; |
1154 | } | |
3ee4defc | 1155 | /* Read and skip to end of line. */ |
252b5132 RH |
1156 | do |
1157 | { | |
1158 | ch = GET (); | |
1159 | } | |
1160 | while (ch != EOF && ch != '\n'); | |
204cd129 | 1161 | |
252b5132 | 1162 | if (ch == EOF) |
204cd129 NC |
1163 | as_warn (_("end of file in comment; newline inserted")); |
1164 | ||
252b5132 RH |
1165 | state = 0; |
1166 | PUT ('\n'); | |
1167 | break; | |
3ee4defc | 1168 | #endif |
f28e8eb3 | 1169 | #ifdef DOUBLEBAR_PARALLEL |
252b5132 | 1170 | case LEX_IS_DOUBLEBAR_1ST: |
30a2b4ef | 1171 | ch2 = GET (); |
83bd7402 NC |
1172 | if (ch2 != EOF) |
1173 | UNGET (ch2); | |
252b5132 | 1174 | if (ch2 != '|') |
204cd129 NC |
1175 | goto de_fault; |
1176 | ||
b1ac4c66 AM |
1177 | /* Handle '||' in two states as invoking PUT twice might |
1178 | result in the first one jumping out of this loop. We'd | |
1179 | then lose track of the state and one '|' char. */ | |
1180 | state = 13; | |
252b5132 RH |
1181 | PUT ('|'); |
1182 | break; | |
3ee4defc | 1183 | #endif |
252b5132 RH |
1184 | case LEX_IS_LINE_COMMENT_START: |
1185 | /* FIXME-someday: The two character comment stuff was badly | |
1186 | thought out. On i386, we want '/' as line comment start | |
1187 | AND we want C style comments. hence this hack. The | |
1188 | whole lexical process should be reworked. xoxorich. */ | |
1189 | if (ch == '/') | |
1190 | { | |
1191 | ch2 = GET (); | |
1192 | if (ch2 == '*') | |
1193 | { | |
1194 | old_state = 3; | |
1195 | state = -2; | |
1196 | break; | |
1197 | } | |
69ace220 | 1198 | else if (ch2 != EOF) |
252b5132 RH |
1199 | { |
1200 | UNGET (ch2); | |
1201 | } | |
204cd129 | 1202 | } |
252b5132 RH |
1203 | |
1204 | if (state == 0 || state == 1) /* Only comment at start of line. */ | |
1205 | { | |
1206 | int startch; | |
1207 | ||
1208 | startch = ch; | |
1209 | ||
1210 | do | |
1211 | { | |
1212 | ch = GET (); | |
1213 | } | |
1214 | while (ch != EOF && IS_WHITESPACE (ch)); | |
204cd129 | 1215 | |
252b5132 RH |
1216 | if (ch == EOF) |
1217 | { | |
1218 | as_warn (_("end of file in comment; newline inserted")); | |
1219 | PUT ('\n'); | |
1220 | break; | |
1221 | } | |
204cd129 | 1222 | |
252b5132 RH |
1223 | if (ch < '0' || ch > '9' || state != 0 || startch != '#') |
1224 | { | |
1225 | /* Not a cpp line. */ | |
1226 | while (ch != EOF && !IS_NEWLINE (ch)) | |
1227 | ch = GET (); | |
1228 | if (ch == EOF) | |
cf3f45fa AM |
1229 | { |
1230 | as_warn (_("end of file in comment; newline inserted")); | |
1231 | PUT ('\n'); | |
1232 | } | |
1233 | else /* IS_NEWLINE (ch) */ | |
1234 | { | |
1235 | /* To process non-zero add_newlines. */ | |
1236 | UNGET (ch); | |
1237 | } | |
252b5132 | 1238 | state = 0; |
252b5132 RH |
1239 | break; |
1240 | } | |
3ee4defc | 1241 | /* Looks like `# 123 "filename"' from cpp. */ |
252b5132 RH |
1242 | UNGET (ch); |
1243 | old_state = 4; | |
1244 | state = -1; | |
1245 | if (scrub_m68k_mri) | |
93e914b2 | 1246 | out_string = "\tlinefile "; |
252b5132 | 1247 | else |
93e914b2 | 1248 | out_string = "\t.linefile "; |
252b5132 RH |
1249 | PUT (*out_string++); |
1250 | break; | |
1251 | } | |
1252 | ||
1253 | #ifdef TC_D10V | |
1254 | /* All insns end in a char for which LEX_IS_SYMBOL_COMPONENT is true. | |
1255 | Trap is the only short insn that has a first operand that is | |
1256 | neither register nor label. | |
1257 | We must prevent exef0f ||trap #1 to degenerate to exef0f ||trap#1 . | |
30a2b4ef KH |
1258 | We can't make '#' LEX_IS_SYMBOL_COMPONENT because it is |
1259 | already LEX_IS_LINE_COMMENT_START. However, it is the | |
1260 | only character in line_comment_chars for d10v, hence we | |
1261 | can recognize it as such. */ | |
252b5132 RH |
1262 | /* An alternative approach would be to reset the state to 1 when |
1263 | we see '||', '<'- or '->', but that seems to be overkill. */ | |
30a2b4ef KH |
1264 | if (state == 10) |
1265 | PUT (' '); | |
252b5132 RH |
1266 | #endif |
1267 | /* We have a line comment character which is not at the | |
1268 | start of a line. If this is also a normal comment | |
1269 | character, fall through. Otherwise treat it as a default | |
1270 | character. */ | |
1271 | if (strchr (tc_comment_chars, ch) == NULL | |
1272 | && (! scrub_m68k_mri | |
1273 | || (ch != '!' && ch != '*'))) | |
1274 | goto de_fault; | |
1275 | if (scrub_m68k_mri | |
1276 | && (ch == '!' || ch == '*' || ch == '#') | |
1277 | && state != 1 | |
1278 | && state != 10) | |
1279 | goto de_fault; | |
1280 | /* Fall through. */ | |
1281 | case LEX_IS_COMMENT_START: | |
1282 | #if defined TC_ARM && defined OBJ_ELF | |
1283 | /* On the ARM, `@' is the comment character. | |
1284 | Unfortunately this is also a special character in ELF .symver | |
30a2b4ef KH |
1285 | directives (and .type, though we deal with those another way). |
1286 | So we check if this line is such a directive, and treat | |
1287 | the character as default if so. This is a hack. */ | |
252b5132 RH |
1288 | if ((symver_state != NULL) && (*symver_state == 0)) |
1289 | goto de_fault; | |
4c400d5e | 1290 | #endif |
2a676888 MS |
1291 | |
1292 | #ifdef TC_ARM | |
1293 | /* For the ARM, care is needed not to damage occurrences of \@ | |
1294 | by stripping the @ onwards. Yuck. */ | |
ab1fadc6 | 1295 | if ((to > tostart ? to[-1] : last_char) == '\\') |
2a676888 MS |
1296 | /* Do not treat the @ as a start-of-comment. */ |
1297 | goto de_fault; | |
1298 | #endif | |
1299 | ||
4c400d5e AM |
1300 | #ifdef WARN_COMMENTS |
1301 | if (!found_comment) | |
3b4dbbbf | 1302 | found_comment_file = as_where (&found_comment); |
252b5132 RH |
1303 | #endif |
1304 | do | |
1305 | { | |
1306 | ch = GET (); | |
1307 | } | |
1308 | while (ch != EOF && !IS_NEWLINE (ch)); | |
1309 | if (ch == EOF) | |
1310 | as_warn (_("end of file in comment; newline inserted")); | |
1311 | state = 0; | |
1312 | PUT ('\n'); | |
1313 | break; | |
1314 | ||
c54b5932 DD |
1315 | #ifdef H_TICK_HEX |
1316 | case LEX_IS_H: | |
1317 | /* Look for strings like H'[0-9A-Fa-f] and if found, replace | |
1318 | the H' with 0x to make them gas-style hex characters. */ | |
1319 | if (enable_h_tick_hex) | |
1320 | { | |
1321 | char quot; | |
1322 | ||
1323 | quot = GET (); | |
1324 | if (quot == '\'') | |
1325 | { | |
1326 | UNGET ('x'); | |
1327 | ch = '0'; | |
1328 | } | |
1329 | else | |
1330 | UNGET (quot); | |
1331 | } | |
c54b5932 | 1332 | #endif |
fcddde94 | 1333 | /* Fall through. */ |
c54b5932 | 1334 | |
252b5132 RH |
1335 | case LEX_IS_SYMBOL_COMPONENT: |
1336 | if (state == 10) | |
1337 | { | |
1338 | /* This is a symbol character following another symbol | |
1339 | character, with whitespace in between. We skipped | |
1340 | the whitespace earlier, so output it now. */ | |
1341 | UNGET (ch); | |
1342 | state = 3; | |
1343 | PUT (' '); | |
1344 | break; | |
1345 | } | |
1346 | ||
3c9b82ba NC |
1347 | #ifdef TC_Z80 |
1348 | /* "af'" is a symbol containing '\''. */ | |
34bca508 | 1349 | if (state == 3 && (ch == 'a' || ch == 'A')) |
3c9b82ba NC |
1350 | { |
1351 | state = 16; | |
1352 | PUT (ch); | |
1353 | ch = GET (); | |
34bca508 | 1354 | if (ch == 'f' || ch == 'F') |
3c9b82ba NC |
1355 | { |
1356 | state = 17; | |
1357 | PUT (ch); | |
1358 | break; | |
1359 | } | |
1360 | else | |
1361 | { | |
1362 | state = 9; | |
536695d0 | 1363 | if (ch == EOF || !IS_SYMBOL_COMPONENT (ch)) |
3c9b82ba | 1364 | { |
0146fc9d NC |
1365 | if (ch != EOF) |
1366 | UNGET (ch); | |
3c9b82ba NC |
1367 | break; |
1368 | } | |
1369 | } | |
1370 | } | |
1371 | #endif | |
252b5132 RH |
1372 | if (state == 3) |
1373 | state = 9; | |
1374 | ||
1375 | /* This is a common case. Quickly copy CH and all the | |
b1ac4c66 | 1376 | following symbol component or normal characters. */ |
252b5132 RH |
1377 | if (to + 1 < toend |
1378 | && mri_state == NULL | |
1379 | #if defined TC_ARM && defined OBJ_ELF | |
1380 | && symver_state == NULL | |
1381 | #endif | |
1382 | ) | |
1383 | { | |
1384 | char *s; | |
39a45edc | 1385 | ptrdiff_t len; |
252b5132 RH |
1386 | |
1387 | for (s = from; s < fromend; s++) | |
1388 | { | |
1389 | int type; | |
1390 | ||
30a2b4ef | 1391 | ch2 = *(unsigned char *) s; |
252b5132 RH |
1392 | type = lex[ch2]; |
1393 | if (type != 0 | |
1394 | && type != LEX_IS_SYMBOL_COMPONENT) | |
1395 | break; | |
1396 | } | |
204cd129 | 1397 | |
252b5132 | 1398 | if (s > from) |
204cd129 NC |
1399 | /* Handle the last character normally, for |
1400 | simplicity. */ | |
1401 | --s; | |
1402 | ||
252b5132 | 1403 | len = s - from; |
204cd129 | 1404 | |
252b5132 RH |
1405 | if (len > (toend - to) - 1) |
1406 | len = (toend - to) - 1; | |
204cd129 | 1407 | |
252b5132 RH |
1408 | if (len > 0) |
1409 | { | |
1410 | PUT (ch); | |
518051dc BE |
1411 | memcpy (to, from, len); |
1412 | to += len; | |
1413 | from += len; | |
37b75c0c AM |
1414 | if (to >= toend) |
1415 | goto tofull; | |
252b5132 RH |
1416 | ch = GET (); |
1417 | } | |
1418 | } | |
1419 | ||
1420 | /* Fall through. */ | |
1421 | default: | |
1422 | de_fault: | |
1423 | /* Some relatively `normal' character. */ | |
1424 | if (state == 0) | |
1425 | { | |
9a124774 | 1426 | state = 11; /* Now seeing label definition. */ |
252b5132 RH |
1427 | } |
1428 | else if (state == 1) | |
1429 | { | |
9a124774 | 1430 | state = 2; /* Ditto. */ |
252b5132 RH |
1431 | } |
1432 | else if (state == 9) | |
1433 | { | |
2cdb18a7 | 1434 | if (!IS_SYMBOL_COMPONENT (ch)) |
252b5132 RH |
1435 | state = 3; |
1436 | } | |
1437 | else if (state == 10) | |
1438 | { | |
c5c834aa AH |
1439 | if (ch == '\\') |
1440 | { | |
1441 | /* Special handling for backslash: a backslash may | |
1442 | be the beginning of a formal parameter (of a | |
1443 | macro) following another symbol character, with | |
1444 | whitespace in between. If that is the case, we | |
1445 | output a space before the parameter. Strictly | |
1446 | speaking, correct handling depends upon what the | |
1447 | macro parameter expands into; if the parameter | |
1448 | expands into something which does not start with | |
1449 | an operand character, then we don't want to keep | |
1450 | the space. We don't have enough information to | |
1451 | make the right choice, so here we are making the | |
1452 | choice which is more likely to be correct. */ | |
1740b7b1 NS |
1453 | if (to + 1 >= toend) |
1454 | { | |
1455 | /* If we're near the end of the buffer, save the | |
1456 | character for the next time round. Otherwise | |
1457 | we'll lose our state. */ | |
1458 | UNGET (ch); | |
1459 | goto tofull; | |
1460 | } | |
1461 | *to++ = ' '; | |
c5c834aa AH |
1462 | } |
1463 | ||
252b5132 RH |
1464 | state = 3; |
1465 | } | |
1466 | PUT (ch); | |
1467 | break; | |
1468 | } | |
1469 | } | |
1470 | ||
1471 | /*NOTREACHED*/ | |
1472 | ||
1473 | fromeof: | |
1474 | /* We have reached the end of the input. */ | |
ab1fadc6 AM |
1475 | #ifdef TC_ARM |
1476 | if (to > tostart) | |
1477 | last_char = to[-1]; | |
1478 | #endif | |
252b5132 RH |
1479 | return to - tostart; |
1480 | ||
1481 | tofull: | |
1482 | /* The output buffer is full. Save any input we have not yet | |
1483 | processed. */ | |
1484 | if (fromend > from) | |
1485 | { | |
2b47531b | 1486 | saved_input = from; |
252b5132 RH |
1487 | saved_input_len = fromend - from; |
1488 | } | |
1489 | else | |
2b47531b ILT |
1490 | saved_input = NULL; |
1491 | ||
ab1fadc6 AM |
1492 | #ifdef TC_ARM |
1493 | if (to > tostart) | |
1494 | last_char = to[-1]; | |
1495 | #endif | |
252b5132 RH |
1496 | return to - tostart; |
1497 | } |