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252b5132 | 1 | /* This is the Assembler Pre-Processor |
a2c58332 | 2 | Copyright (C) 1987-2022 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 | |
750e4bf7 | 58 | |
ab1fadc6 | 59 | static char last_char; |
252b5132 RH |
60 | |
61 | static char lex[256]; | |
62 | static const char symbol_chars[] = | |
63 | "$._ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; | |
64 | ||
65 | #define LEX_IS_SYMBOL_COMPONENT 1 | |
66 | #define LEX_IS_WHITESPACE 2 | |
67 | #define LEX_IS_LINE_SEPARATOR 3 | |
68 | #define LEX_IS_COMMENT_START 4 | |
69 | #define LEX_IS_LINE_COMMENT_START 5 | |
70 | #define LEX_IS_TWOCHAR_COMMENT_1ST 6 | |
71 | #define LEX_IS_STRINGQUOTE 8 | |
72 | #define LEX_IS_COLON 9 | |
73 | #define LEX_IS_NEWLINE 10 | |
74 | #define LEX_IS_ONECHAR_QUOTE 11 | |
75 | #ifdef TC_V850 | |
76 | #define LEX_IS_DOUBLEDASH_1ST 12 | |
77 | #endif | |
78 | #ifdef TC_M32R | |
f28e8eb3 TW |
79 | #define DOUBLEBAR_PARALLEL |
80 | #endif | |
81 | #ifdef DOUBLEBAR_PARALLEL | |
252b5132 RH |
82 | #define LEX_IS_DOUBLEBAR_1ST 13 |
83 | #endif | |
62f65a7b | 84 | #define LEX_IS_PARALLEL_SEPARATOR 14 |
c54b5932 DD |
85 | #ifdef H_TICK_HEX |
86 | #define LEX_IS_H 15 | |
87 | #endif | |
252b5132 RH |
88 | #define IS_SYMBOL_COMPONENT(c) (lex[c] == LEX_IS_SYMBOL_COMPONENT) |
89 | #define IS_WHITESPACE(c) (lex[c] == LEX_IS_WHITESPACE) | |
90 | #define IS_LINE_SEPARATOR(c) (lex[c] == LEX_IS_LINE_SEPARATOR) | |
62f65a7b | 91 | #define IS_PARALLEL_SEPARATOR(c) (lex[c] == LEX_IS_PARALLEL_SEPARATOR) |
252b5132 RH |
92 | #define IS_COMMENT(c) (lex[c] == LEX_IS_COMMENT_START) |
93 | #define IS_LINE_COMMENT(c) (lex[c] == LEX_IS_LINE_COMMENT_START) | |
94 | #define IS_NEWLINE(c) (lex[c] == LEX_IS_NEWLINE) | |
95 | ||
73ee5e4c | 96 | static int process_escape (int); |
252b5132 RH |
97 | |
98 | /* FIXME-soon: The entire lexer/parser thingy should be | |
99 | built statically at compile time rather than dynamically | |
3ee4defc | 100 | each and every time the assembler is run. xoxorich. */ |
252b5132 | 101 | |
3ee4defc | 102 | void |
73ee5e4c | 103 | do_scrub_begin (int m68k_mri ATTRIBUTE_UNUSED) |
252b5132 RH |
104 | { |
105 | const char *p; | |
106 | int c; | |
107 | ||
252b5132 RH |
108 | lex[' '] = LEX_IS_WHITESPACE; |
109 | lex['\t'] = LEX_IS_WHITESPACE; | |
110 | lex['\r'] = LEX_IS_WHITESPACE; | |
111 | lex['\n'] = LEX_IS_NEWLINE; | |
252b5132 RH |
112 | lex[':'] = LEX_IS_COLON; |
113 | ||
abd63a32 AM |
114 | #ifdef TC_M68K |
115 | scrub_m68k_mri = m68k_mri; | |
116 | ||
252b5132 | 117 | if (! m68k_mri) |
abd63a32 | 118 | #endif |
252b5132 RH |
119 | { |
120 | lex['"'] = LEX_IS_STRINGQUOTE; | |
121 | ||
6793974d | 122 | #if ! defined (TC_HPPA) |
252b5132 RH |
123 | lex['\''] = LEX_IS_ONECHAR_QUOTE; |
124 | #endif | |
125 | ||
126 | #ifdef SINGLE_QUOTE_STRINGS | |
127 | lex['\''] = LEX_IS_STRINGQUOTE; | |
128 | #endif | |
129 | } | |
130 | ||
131 | /* Note: if any other character can be LEX_IS_STRINGQUOTE, the loop | |
132 | in state 5 of do_scrub_chars must be changed. */ | |
133 | ||
134 | /* Note that these override the previous defaults, e.g. if ';' is a | |
135 | comment char, then it isn't a line separator. */ | |
136 | for (p = symbol_chars; *p; ++p) | |
204cd129 | 137 | lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT; |
252b5132 RH |
138 | |
139 | for (c = 128; c < 256; ++c) | |
140 | lex[c] = LEX_IS_SYMBOL_COMPONENT; | |
141 | ||
142 | #ifdef tc_symbol_chars | |
143 | /* This macro permits the processor to specify all characters which | |
144 | may appears in an operand. This will prevent the scrubber from | |
145 | discarding meaningful whitespace in certain cases. The i386 | |
146 | backend uses this to support prefixes, which can confuse the | |
147 | scrubber as to whether it is parsing operands or opcodes. */ | |
148 | for (p = tc_symbol_chars; *p; ++p) | |
149 | lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT; | |
150 | #endif | |
151 | ||
152 | /* The m68k backend wants to be able to change comment_chars. */ | |
153 | #ifndef tc_comment_chars | |
154 | #define tc_comment_chars comment_chars | |
155 | #endif | |
156 | for (p = tc_comment_chars; *p; p++) | |
204cd129 | 157 | lex[(unsigned char) *p] = LEX_IS_COMMENT_START; |
252b5132 RH |
158 | |
159 | for (p = line_comment_chars; *p; p++) | |
204cd129 | 160 | lex[(unsigned char) *p] = LEX_IS_LINE_COMMENT_START; |
252b5132 | 161 | |
2e6976a8 DG |
162 | #ifndef tc_line_separator_chars |
163 | #define tc_line_separator_chars line_separator_chars | |
164 | #endif | |
165 | for (p = tc_line_separator_chars; *p; p++) | |
204cd129 | 166 | lex[(unsigned char) *p] = LEX_IS_LINE_SEPARATOR; |
252b5132 | 167 | |
62f65a7b DB |
168 | #ifdef tc_parallel_separator_chars |
169 | /* This macro permits the processor to specify all characters which | |
170 | separate parallel insns on the same line. */ | |
171 | for (p = tc_parallel_separator_chars; *p; p++) | |
204cd129 | 172 | lex[(unsigned char) *p] = LEX_IS_PARALLEL_SEPARATOR; |
62f65a7b DB |
173 | #endif |
174 | ||
252b5132 RH |
175 | /* Only allow slash-star comments if slash is not in use. |
176 | FIXME: This isn't right. We should always permit them. */ | |
177 | if (lex['/'] == 0) | |
204cd129 | 178 | lex['/'] = LEX_IS_TWOCHAR_COMMENT_1ST; |
252b5132 | 179 | |
abd63a32 | 180 | #ifdef TC_M68K |
252b5132 RH |
181 | if (m68k_mri) |
182 | { | |
183 | lex['\''] = LEX_IS_STRINGQUOTE; | |
184 | lex[';'] = LEX_IS_COMMENT_START; | |
185 | lex['*'] = LEX_IS_LINE_COMMENT_START; | |
186 | /* The MRI documentation says '!' is LEX_IS_COMMENT_START, but | |
b1ac4c66 | 187 | then it can't be used in an expression. */ |
252b5132 RH |
188 | lex['!'] = LEX_IS_LINE_COMMENT_START; |
189 | } | |
abd63a32 | 190 | #endif |
252b5132 RH |
191 | |
192 | #ifdef TC_V850 | |
193 | lex['-'] = LEX_IS_DOUBLEDASH_1ST; | |
194 | #endif | |
f28e8eb3 | 195 | #ifdef DOUBLEBAR_PARALLEL |
252b5132 RH |
196 | lex['|'] = LEX_IS_DOUBLEBAR_1ST; |
197 | #endif | |
198 | #ifdef TC_D30V | |
204cd129 | 199 | /* Must do this is we want VLIW instruction with "->" or "<-". */ |
252b5132 RH |
200 | lex['-'] = LEX_IS_SYMBOL_COMPONENT; |
201 | #endif | |
c54b5932 DD |
202 | |
203 | #ifdef H_TICK_HEX | |
204 | if (enable_h_tick_hex) | |
205 | { | |
206 | lex['h'] = LEX_IS_H; | |
207 | lex['H'] = LEX_IS_H; | |
208 | } | |
209 | #endif | |
204cd129 | 210 | } |
252b5132 | 211 | |
204cd129 | 212 | /* Saved state of the scrubber. */ |
252b5132 RH |
213 | static int state; |
214 | static int old_state; | |
cd0bbe6e | 215 | static const char *out_string; |
252b5132 RH |
216 | static char out_buf[20]; |
217 | static int add_newlines; | |
218 | static char *saved_input; | |
39a45edc | 219 | static size_t saved_input_len; |
2b47531b | 220 | static char input_buffer[32 * 1024]; |
252b5132 RH |
221 | static const char *mri_state; |
222 | static char mri_last_ch; | |
223 | ||
224 | /* Data structure for saving the state of app across #include's. Note that | |
225 | app is called asynchronously to the parsing of the .include's, so our | |
226 | state at the time .include is interpreted is completely unrelated. | |
227 | That's why we have to save it all. */ | |
228 | ||
204cd129 NC |
229 | struct app_save |
230 | { | |
30a2b4ef KH |
231 | int state; |
232 | int old_state; | |
cd0bbe6e | 233 | const char * out_string; |
30a2b4ef KH |
234 | char out_buf[sizeof (out_buf)]; |
235 | int add_newlines; | |
236 | char * saved_input; | |
39a45edc | 237 | size_t saved_input_len; |
abd63a32 | 238 | #ifdef TC_M68K |
30a2b4ef | 239 | int scrub_m68k_mri; |
abd63a32 | 240 | #endif |
30a2b4ef KH |
241 | const char * mri_state; |
242 | char mri_last_ch; | |
252b5132 | 243 | #if defined TC_ARM && defined OBJ_ELF |
30a2b4ef | 244 | const char * symver_state; |
252b5132 | 245 | #endif |
750e4bf7 | 246 | char last_char; |
30a2b4ef | 247 | }; |
252b5132 RH |
248 | |
249 | char * | |
73ee5e4c | 250 | app_push (void) |
252b5132 | 251 | { |
ed9e98c2 | 252 | struct app_save *saved; |
252b5132 | 253 | |
325801bd | 254 | saved = XNEW (struct app_save); |
252b5132 RH |
255 | saved->state = state; |
256 | saved->old_state = old_state; | |
257 | saved->out_string = out_string; | |
258 | memcpy (saved->out_buf, out_buf, sizeof (out_buf)); | |
259 | saved->add_newlines = add_newlines; | |
2b47531b ILT |
260 | if (saved_input == NULL) |
261 | saved->saved_input = NULL; | |
262 | else | |
263 | { | |
add39d23 | 264 | saved->saved_input = XNEWVEC (char, saved_input_len); |
2b47531b ILT |
265 | memcpy (saved->saved_input, saved_input, saved_input_len); |
266 | saved->saved_input_len = saved_input_len; | |
267 | } | |
abd63a32 | 268 | #ifdef TC_M68K |
252b5132 | 269 | saved->scrub_m68k_mri = scrub_m68k_mri; |
abd63a32 | 270 | #endif |
252b5132 RH |
271 | saved->mri_state = mri_state; |
272 | saved->mri_last_ch = mri_last_ch; | |
273 | #if defined TC_ARM && defined OBJ_ELF | |
274 | saved->symver_state = symver_state; | |
275 | #endif | |
ab1fadc6 | 276 | saved->last_char = last_char; |
252b5132 | 277 | |
3ee4defc | 278 | /* do_scrub_begin() is not useful, just wastes time. */ |
252b5132 RH |
279 | |
280 | state = 0; | |
281 | saved_input = NULL; | |
f8819316 | 282 | add_newlines = 0; |
252b5132 RH |
283 | |
284 | return (char *) saved; | |
285 | } | |
286 | ||
3ee4defc | 287 | void |
73ee5e4c | 288 | app_pop (char *arg) |
252b5132 | 289 | { |
ed9e98c2 | 290 | struct app_save *saved = (struct app_save *) arg; |
252b5132 | 291 | |
3ee4defc | 292 | /* There is no do_scrub_end (). */ |
252b5132 RH |
293 | state = saved->state; |
294 | old_state = saved->old_state; | |
295 | out_string = saved->out_string; | |
296 | memcpy (out_buf, saved->out_buf, sizeof (out_buf)); | |
297 | add_newlines = saved->add_newlines; | |
2b47531b ILT |
298 | if (saved->saved_input == NULL) |
299 | saved_input = NULL; | |
300 | else | |
301 | { | |
39a45edc | 302 | gas_assert (saved->saved_input_len <= sizeof (input_buffer)); |
2b47531b ILT |
303 | memcpy (input_buffer, saved->saved_input, saved->saved_input_len); |
304 | saved_input = input_buffer; | |
305 | saved_input_len = saved->saved_input_len; | |
306 | free (saved->saved_input); | |
307 | } | |
abd63a32 | 308 | #ifdef TC_M68K |
252b5132 | 309 | scrub_m68k_mri = saved->scrub_m68k_mri; |
abd63a32 | 310 | #endif |
252b5132 RH |
311 | mri_state = saved->mri_state; |
312 | mri_last_ch = saved->mri_last_ch; | |
313 | #if defined TC_ARM && defined OBJ_ELF | |
314 | symver_state = saved->symver_state; | |
315 | #endif | |
ab1fadc6 | 316 | last_char = saved->last_char; |
252b5132 RH |
317 | |
318 | free (arg); | |
204cd129 | 319 | } |
252b5132 RH |
320 | |
321 | /* @@ This assumes that \n &c are the same on host and target. This is not | |
322 | necessarily true. */ | |
204cd129 | 323 | |
3ee4defc | 324 | static int |
73ee5e4c | 325 | process_escape (int ch) |
252b5132 RH |
326 | { |
327 | switch (ch) | |
328 | { | |
329 | case 'b': | |
330 | return '\b'; | |
331 | case 'f': | |
332 | return '\f'; | |
333 | case 'n': | |
334 | return '\n'; | |
335 | case 'r': | |
336 | return '\r'; | |
337 | case 't': | |
338 | return '\t'; | |
339 | case '\'': | |
340 | return '\''; | |
341 | case '"': | |
342 | return '\"'; | |
343 | default: | |
344 | return ch; | |
345 | } | |
346 | } | |
347 | ||
578c64a4 NC |
348 | #define MULTIBYTE_WARN_COUNT_LIMIT 10 |
349 | static unsigned int multibyte_warn_count = 0; | |
350 | ||
351 | bool | |
352 | scan_for_multibyte_characters (const unsigned char * start, | |
353 | const unsigned char * end, | |
354 | bool warn) | |
355 | { | |
356 | if (end <= start) | |
357 | return false; | |
358 | ||
359 | if (warn && multibyte_warn_count > MULTIBYTE_WARN_COUNT_LIMIT) | |
360 | return false; | |
361 | ||
362 | bool found = false; | |
363 | ||
364 | while (start < end) | |
365 | { | |
366 | unsigned char c; | |
367 | ||
368 | if ((c = * start++) <= 0x7f) | |
369 | continue; | |
370 | ||
371 | if (!warn) | |
372 | return true; | |
373 | ||
374 | found = true; | |
375 | ||
376 | const char * filename; | |
377 | unsigned int lineno; | |
378 | ||
379 | filename = as_where (& lineno); | |
380 | if (filename == NULL) | |
381 | as_warn (_("multibyte character (%#x) encountered in input"), c); | |
382 | else if (lineno == 0) | |
383 | as_warn (_("multibyte character (%#x) encountered in %s"), c, filename); | |
384 | else | |
385 | as_warn (_("multibyte character (%#x) encountered in %s at or near line %u"), c, filename, lineno); | |
386 | ||
387 | if (++ multibyte_warn_count == MULTIBYTE_WARN_COUNT_LIMIT) | |
388 | { | |
389 | as_warn (_("further multibyte character warnings suppressed")); | |
390 | break; | |
391 | } | |
392 | } | |
393 | ||
394 | return found; | |
395 | } | |
396 | ||
252b5132 RH |
397 | /* This function is called to process input characters. The GET |
398 | parameter is used to retrieve more input characters. GET should | |
399 | set its parameter to point to a buffer, and return the length of | |
400 | the buffer; it should return 0 at end of file. The scrubbed output | |
401 | characters are put into the buffer starting at TOSTART; the TOSTART | |
402 | buffer is TOLEN bytes in length. The function returns the number | |
403 | of scrubbed characters put into TOSTART. This will be TOLEN unless | |
404 | end of file was seen. This function is arranged as a state | |
405 | machine, and saves its state so that it may return at any point. | |
406 | This is the way the old code used to work. */ | |
407 | ||
39a45edc AM |
408 | size_t |
409 | do_scrub_chars (size_t (*get) (char *, size_t), char *tostart, size_t tolen) | |
252b5132 RH |
410 | { |
411 | char *to = tostart; | |
412 | char *toend = tostart + tolen; | |
413 | char *from; | |
414 | char *fromend; | |
39a45edc | 415 | size_t fromlen; |
ed9e98c2 | 416 | int ch, ch2 = 0; |
c9c5dcda AM |
417 | /* Character that started the string we're working on. */ |
418 | static char quotechar; | |
252b5132 RH |
419 | |
420 | /*State 0: beginning of normal line | |
421 | 1: After first whitespace on line (flush more white) | |
422 | 2: After first non-white (opcode) on line (keep 1white) | |
423 | 3: after second white on line (into operands) (flush white) | |
93e914b2 | 424 | 4: after putting out a .linefile, put out digits |
252b5132 RH |
425 | 5: parsing a string, then go to old-state |
426 | 6: putting out \ escape in a "d string. | |
93e914b2 | 427 | 7: no longer used |
e9fc6c21 | 428 | 8: no longer used |
252b5132 RH |
429 | 9: After seeing symbol char in state 3 (keep 1white after symchar) |
430 | 10: After seeing whitespace in state 9 (keep white before symchar) | |
431 | 11: After seeing a symbol character in state 0 (eg a label definition) | |
432 | -1: output string in out_string and go to the state in old_state | |
433 | -2: flush text until a '*' '/' is seen, then go to state old_state | |
434 | #ifdef TC_V850 | |
b1ac4c66 AM |
435 | 12: After seeing a dash, looking for a second dash as a start |
436 | of comment. | |
252b5132 | 437 | #endif |
f28e8eb3 | 438 | #ifdef DOUBLEBAR_PARALLEL |
b1ac4c66 AM |
439 | 13: After seeing a vertical bar, looking for a second |
440 | vertical bar as a parallel expression separator. | |
52628315 | 441 | #endif |
40b36596 JM |
442 | #ifdef TC_PREDICATE_START_CHAR |
443 | 14: After seeing a predicate start character at state 0, looking | |
444 | for a predicate end character as predicate. | |
445 | 15: After seeing a predicate start character at state 1, looking | |
446 | for a predicate end character as predicate. | |
3c9b82ba NC |
447 | #endif |
448 | #ifdef TC_Z80 | |
449 | 16: After seeing an 'a' or an 'A' at the start of a symbol | |
450 | 17: After seeing an 'f' or an 'F' in state 16 | |
252b5132 RH |
451 | #endif |
452 | */ | |
453 | ||
454 | /* I added states 9 and 10 because the MIPS ECOFF assembler uses | |
455 | constructs like ``.loc 1 20''. This was turning into ``.loc | |
456 | 120''. States 9 and 10 ensure that a space is never dropped in | |
3b37fd66 | 457 | between characters which could appear in an identifier. Ian |
252b5132 RH |
458 | Taylor, ian@cygnus.com. |
459 | ||
460 | I added state 11 so that something like "Lfoo add %r25,%r26,%r27" works | |
461 | correctly on the PA (and any other target where colons are optional). | |
462 | Jeff Law, law@cs.utah.edu. | |
463 | ||
464 | I added state 13 so that something like "cmp r1, r2 || trap #1" does not | |
465 | get squashed into "cmp r1,r2||trap#1", with the all important space | |
466 | between the 'trap' and the '#1' being eliminated. nickc@cygnus.com */ | |
467 | ||
468 | /* This macro gets the next input character. */ | |
469 | ||
2b47531b ILT |
470 | #define GET() \ |
471 | (from < fromend \ | |
472 | ? * (unsigned char *) (from++) \ | |
473 | : (saved_input = NULL, \ | |
474 | fromlen = (*get) (input_buffer, sizeof input_buffer), \ | |
475 | from = input_buffer, \ | |
476 | fromend = from + fromlen, \ | |
477 | (fromlen == 0 \ | |
478 | ? EOF \ | |
252b5132 RH |
479 | : * (unsigned char *) (from++)))) |
480 | ||
481 | /* This macro pushes a character back on the input stream. */ | |
482 | ||
483 | #define UNGET(uch) (*--from = (uch)) | |
484 | ||
485 | /* This macro puts a character into the output buffer. If this | |
486 | character fills the output buffer, this macro jumps to the label | |
487 | TOFULL. We use this rather ugly approach because we need to | |
488 | handle two different termination conditions: EOF on the input | |
489 | stream, and a full output buffer. It would be simpler if we | |
490 | always read in the entire input stream before processing it, but | |
491 | I don't want to make such a significant change to the assembler's | |
492 | memory usage. */ | |
493 | ||
411863a4 KH |
494 | #define PUT(pch) \ |
495 | do \ | |
496 | { \ | |
497 | *to++ = (pch); \ | |
498 | if (to >= toend) \ | |
499 | goto tofull; \ | |
500 | } \ | |
252b5132 RH |
501 | while (0) |
502 | ||
503 | if (saved_input != NULL) | |
504 | { | |
505 | from = saved_input; | |
506 | fromend = from + saved_input_len; | |
507 | } | |
508 | else | |
509 | { | |
2b47531b | 510 | fromlen = (*get) (input_buffer, sizeof input_buffer); |
252b5132 RH |
511 | if (fromlen == 0) |
512 | return 0; | |
2b47531b | 513 | from = input_buffer; |
252b5132 | 514 | fromend = from + fromlen; |
578c64a4 NC |
515 | |
516 | if (multibyte_handling == multibyte_warn) | |
517 | (void) scan_for_multibyte_characters ((const unsigned char *) from, | |
518 | (const unsigned char* ) fromend, | |
519 | true /* Generate warnings. */); | |
252b5132 RH |
520 | } |
521 | ||
522 | while (1) | |
523 | { | |
524 | /* The cases in this switch end with continue, in order to | |
b1ac4c66 AM |
525 | branch back to the top of this while loop and generate the |
526 | next output character in the appropriate state. */ | |
252b5132 RH |
527 | switch (state) |
528 | { | |
529 | case -1: | |
530 | ch = *out_string++; | |
531 | if (*out_string == '\0') | |
532 | { | |
533 | state = old_state; | |
534 | old_state = 3; | |
535 | } | |
536 | PUT (ch); | |
537 | continue; | |
538 | ||
539 | case -2: | |
540 | for (;;) | |
541 | { | |
542 | do | |
543 | { | |
544 | ch = GET (); | |
545 | ||
546 | if (ch == EOF) | |
547 | { | |
548 | as_warn (_("end of file in comment")); | |
549 | goto fromeof; | |
550 | } | |
551 | ||
552 | if (ch == '\n') | |
553 | PUT ('\n'); | |
554 | } | |
555 | while (ch != '*'); | |
556 | ||
557 | while ((ch = GET ()) == '*') | |
558 | ; | |
559 | ||
560 | if (ch == EOF) | |
561 | { | |
562 | as_warn (_("end of file in comment")); | |
563 | goto fromeof; | |
564 | } | |
565 | ||
566 | if (ch == '/') | |
567 | break; | |
568 | ||
569 | UNGET (ch); | |
570 | } | |
571 | ||
572 | state = old_state; | |
573 | UNGET (' '); | |
574 | continue; | |
575 | ||
576 | case 4: | |
577 | ch = GET (); | |
578 | if (ch == EOF) | |
579 | goto fromeof; | |
580 | else if (ch >= '0' && ch <= '9') | |
581 | PUT (ch); | |
582 | else | |
583 | { | |
584 | while (ch != EOF && IS_WHITESPACE (ch)) | |
585 | ch = GET (); | |
586 | if (ch == '"') | |
587 | { | |
93e914b2 AO |
588 | quotechar = ch; |
589 | state = 5; | |
e9fc6c21 | 590 | old_state = 3; |
4061927e | 591 | PUT (ch); |
252b5132 RH |
592 | } |
593 | else | |
594 | { | |
595 | while (ch != EOF && ch != '\n') | |
596 | ch = GET (); | |
597 | state = 0; | |
598 | PUT (ch); | |
599 | } | |
600 | } | |
601 | continue; | |
602 | ||
603 | case 5: | |
604 | /* We are going to copy everything up to a quote character, | |
b1ac4c66 AM |
605 | with special handling for a backslash. We try to |
606 | optimize the copying in the simple case without using the | |
607 | GET and PUT macros. */ | |
252b5132 RH |
608 | { |
609 | char *s; | |
39a45edc | 610 | ptrdiff_t len; |
252b5132 RH |
611 | |
612 | for (s = from; s < fromend; s++) | |
613 | { | |
614 | ch = *s; | |
252b5132 | 615 | if (ch == '\\' |
c9c5dcda | 616 | || ch == quotechar |
252b5132 RH |
617 | || ch == '\n') |
618 | break; | |
619 | } | |
620 | len = s - from; | |
621 | if (len > toend - to) | |
622 | len = toend - to; | |
623 | if (len > 0) | |
624 | { | |
625 | memcpy (to, from, len); | |
626 | to += len; | |
627 | from += len; | |
df816087 AM |
628 | if (to >= toend) |
629 | goto tofull; | |
252b5132 RH |
630 | } |
631 | } | |
632 | ||
633 | ch = GET (); | |
634 | if (ch == EOF) | |
635 | { | |
fc5910c0 NC |
636 | /* This buffer is here specifically so |
637 | that the UNGET below will work. */ | |
638 | static char one_char_buf[1]; | |
639 | ||
c9c5dcda | 640 | as_warn (_("end of file in string; '%c' inserted"), quotechar); |
252b5132 | 641 | state = old_state; |
fc5910c0 NC |
642 | from = fromend = one_char_buf + 1; |
643 | fromlen = 1; | |
252b5132 | 644 | UNGET ('\n'); |
c9c5dcda | 645 | PUT (quotechar); |
252b5132 | 646 | } |
c9c5dcda | 647 | else if (ch == quotechar) |
252b5132 RH |
648 | { |
649 | state = old_state; | |
650 | PUT (ch); | |
651 | } | |
16d87673 | 652 | else if (TC_STRING_ESCAPES && ch == '\\') |
252b5132 RH |
653 | { |
654 | state = 6; | |
655 | PUT (ch); | |
656 | } | |
252b5132 RH |
657 | else if (scrub_m68k_mri && ch == '\n') |
658 | { | |
659 | /* Just quietly terminate the string. This permits lines like | |
204cd129 | 660 | bne label loop if we haven't reach end yet. */ |
252b5132 RH |
661 | state = old_state; |
662 | UNGET (ch); | |
663 | PUT ('\''); | |
664 | } | |
665 | else | |
666 | { | |
667 | PUT (ch); | |
668 | } | |
669 | continue; | |
670 | ||
671 | case 6: | |
672 | state = 5; | |
673 | ch = GET (); | |
674 | switch (ch) | |
675 | { | |
676 | /* Handle strings broken across lines, by turning '\n' into | |
677 | '\\' and 'n'. */ | |
678 | case '\n': | |
679 | UNGET ('n'); | |
680 | add_newlines++; | |
681 | PUT ('\\'); | |
682 | continue; | |
683 | ||
4252e537 | 684 | case EOF: |
c9c5dcda AM |
685 | as_warn (_("end of file in string; '%c' inserted"), quotechar); |
686 | PUT (quotechar); | |
4252e537 AM |
687 | continue; |
688 | ||
252b5132 RH |
689 | case '"': |
690 | case '\\': | |
691 | case 'b': | |
692 | case 'f': | |
693 | case 'n': | |
694 | case 'r': | |
695 | case 't': | |
696 | case 'v': | |
697 | case 'x': | |
698 | case 'X': | |
699 | case '0': | |
700 | case '1': | |
701 | case '2': | |
702 | case '3': | |
703 | case '4': | |
704 | case '5': | |
705 | case '6': | |
706 | case '7': | |
707 | break; | |
4252e537 | 708 | |
252b5132 | 709 | default: |
4252e537 | 710 | #ifdef ONLY_STANDARD_ESCAPES |
0e389e77 | 711 | as_warn (_("unknown escape '\\%c' in string; ignored"), ch); |
4252e537 | 712 | #endif |
252b5132 | 713 | break; |
252b5132 RH |
714 | } |
715 | PUT (ch); | |
716 | continue; | |
717 | ||
b1ac4c66 AM |
718 | #ifdef DOUBLEBAR_PARALLEL |
719 | case 13: | |
720 | ch = GET (); | |
721 | if (ch != '|') | |
722 | abort (); | |
723 | ||
724 | /* Reset back to state 1 and pretend that we are parsing a | |
725 | line from just after the first white space. */ | |
726 | state = 1; | |
727 | PUT ('|'); | |
40b36596 JM |
728 | #ifdef TC_TIC6X |
729 | /* "||^" is used for SPMASKed instructions. */ | |
730 | ch = GET (); | |
731 | if (ch == EOF) | |
732 | goto fromeof; | |
733 | else if (ch == '^') | |
734 | PUT ('^'); | |
735 | else | |
736 | UNGET (ch); | |
737 | #endif | |
b1ac4c66 | 738 | continue; |
3c9b82ba NC |
739 | #endif |
740 | #ifdef TC_Z80 | |
741 | case 16: | |
742 | /* We have seen an 'a' at the start of a symbol, look for an 'f'. */ | |
743 | ch = GET (); | |
34bca508 | 744 | if (ch == 'f' || ch == 'F') |
3c9b82ba NC |
745 | { |
746 | state = 17; | |
747 | PUT (ch); | |
748 | } | |
749 | else | |
750 | { | |
751 | state = 9; | |
752 | break; | |
753 | } | |
1a0670f3 | 754 | /* Fall through. */ |
3c9b82ba NC |
755 | case 17: |
756 | /* We have seen "af" at the start of a symbol, | |
757 | a ' here is a part of that symbol. */ | |
758 | ch = GET (); | |
759 | state = 9; | |
760 | if (ch == '\'') | |
761 | /* Change to avoid warning about unclosed string. */ | |
762 | PUT ('`'); | |
0146fc9d | 763 | else if (ch != EOF) |
3c9b82ba NC |
764 | UNGET (ch); |
765 | break; | |
b1ac4c66 | 766 | #endif |
252b5132 RH |
767 | } |
768 | ||
204cd129 | 769 | /* OK, we are somewhere in states 0 through 4 or 9 through 11. */ |
252b5132 RH |
770 | |
771 | /* flushchar: */ | |
772 | ch = GET (); | |
773 | ||
40b36596 JM |
774 | #ifdef TC_PREDICATE_START_CHAR |
775 | if (ch == TC_PREDICATE_START_CHAR && (state == 0 || state == 1)) | |
52628315 L |
776 | { |
777 | state += 14; | |
778 | PUT (ch); | |
779 | continue; | |
780 | } | |
781 | else if (state == 14 || state == 15) | |
782 | { | |
40b36596 | 783 | if (ch == TC_PREDICATE_END_CHAR) |
70b911ad JJ |
784 | { |
785 | state -= 14; | |
786 | PUT (ch); | |
787 | ch = GET (); | |
788 | } | |
52628315 L |
789 | else |
790 | { | |
791 | PUT (ch); | |
792 | continue; | |
793 | } | |
794 | } | |
795 | #endif | |
796 | ||
252b5132 RH |
797 | recycle: |
798 | ||
799 | #if defined TC_ARM && defined OBJ_ELF | |
800 | /* We need to watch out for .symver directives. See the comment later | |
801 | in this function. */ | |
802 | if (symver_state == NULL) | |
803 | { | |
804 | if ((state == 0 || state == 1) && ch == symver_pseudo[0]) | |
805 | symver_state = symver_pseudo + 1; | |
806 | } | |
807 | else | |
808 | { | |
809 | /* We advance to the next state if we find the right | |
810 | character. */ | |
811 | if (ch != '\0' && (*symver_state == ch)) | |
812 | ++symver_state; | |
813 | else if (*symver_state != '\0') | |
814 | /* We did not get the expected character, or we didn't | |
815 | get a valid terminating character after seeing the | |
816 | entire pseudo-op, so we must go back to the beginning. */ | |
817 | symver_state = NULL; | |
818 | else | |
819 | { | |
820 | /* We've read the entire pseudo-op. If this is the end | |
821 | of the line, go back to the beginning. */ | |
822 | if (IS_NEWLINE (ch)) | |
823 | symver_state = NULL; | |
824 | } | |
825 | } | |
826 | #endif /* TC_ARM && OBJ_ELF */ | |
827 | ||
828 | #ifdef TC_M68K | |
829 | /* We want to have pseudo-ops which control whether we are in | |
b1ac4c66 AM |
830 | MRI mode or not. Unfortunately, since m68k MRI mode affects |
831 | the scrubber, that means that we need a special purpose | |
832 | recognizer here. */ | |
252b5132 RH |
833 | if (mri_state == NULL) |
834 | { | |
835 | if ((state == 0 || state == 1) | |
836 | && ch == mri_pseudo[0]) | |
837 | mri_state = mri_pseudo + 1; | |
838 | } | |
839 | else | |
840 | { | |
841 | /* We advance to the next state if we find the right | |
842 | character, or if we need a space character and we get any | |
843 | whitespace character, or if we need a '0' and we get a | |
844 | '1' (this is so that we only need one state to handle | |
845 | ``.mri 0'' and ``.mri 1''). */ | |
846 | if (ch != '\0' | |
847 | && (*mri_state == ch | |
848 | || (*mri_state == ' ' | |
849 | && lex[ch] == LEX_IS_WHITESPACE) | |
850 | || (*mri_state == '0' | |
851 | && ch == '1'))) | |
852 | { | |
853 | mri_last_ch = ch; | |
854 | ++mri_state; | |
855 | } | |
856 | else if (*mri_state != '\0' | |
857 | || (lex[ch] != LEX_IS_WHITESPACE | |
858 | && lex[ch] != LEX_IS_NEWLINE)) | |
859 | { | |
860 | /* We did not get the expected character, or we didn't | |
861 | get a valid terminating character after seeing the | |
862 | entire pseudo-op, so we must go back to the | |
863 | beginning. */ | |
864 | mri_state = NULL; | |
865 | } | |
866 | else | |
867 | { | |
868 | /* We've read the entire pseudo-op. mips_last_ch is | |
b1ac4c66 AM |
869 | either '0' or '1' indicating whether to enter or |
870 | leave MRI mode. */ | |
252b5132 RH |
871 | do_scrub_begin (mri_last_ch == '1'); |
872 | mri_state = NULL; | |
873 | ||
874 | /* We continue handling the character as usual. The | |
b1ac4c66 AM |
875 | main gas reader must also handle the .mri pseudo-op |
876 | to control expression parsing and the like. */ | |
252b5132 RH |
877 | } |
878 | } | |
879 | #endif | |
880 | ||
881 | if (ch == EOF) | |
882 | { | |
883 | if (state != 0) | |
884 | { | |
885 | as_warn (_("end of file not at end of a line; newline inserted")); | |
886 | state = 0; | |
887 | PUT ('\n'); | |
888 | } | |
889 | goto fromeof; | |
890 | } | |
891 | ||
892 | switch (lex[ch]) | |
893 | { | |
894 | case LEX_IS_WHITESPACE: | |
895 | do | |
896 | { | |
897 | ch = GET (); | |
898 | } | |
899 | while (ch != EOF && IS_WHITESPACE (ch)); | |
900 | if (ch == EOF) | |
901 | goto fromeof; | |
902 | ||
903 | if (state == 0) | |
904 | { | |
905 | /* Preserve a single whitespace character at the | |
906 | beginning of a line. */ | |
907 | state = 1; | |
908 | UNGET (ch); | |
909 | PUT (' '); | |
910 | break; | |
911 | } | |
912 | ||
f28e8eb3 | 913 | #ifdef KEEP_WHITE_AROUND_COLON |
30a2b4ef KH |
914 | if (lex[ch] == LEX_IS_COLON) |
915 | { | |
916 | /* Only keep this white if there's no white *after* the | |
b1ac4c66 | 917 | colon. */ |
30a2b4ef | 918 | ch2 = GET (); |
83bd7402 NC |
919 | if (ch2 != EOF) |
920 | UNGET (ch2); | |
30a2b4ef KH |
921 | if (!IS_WHITESPACE (ch2)) |
922 | { | |
923 | state = 9; | |
924 | UNGET (ch); | |
925 | PUT (' '); | |
926 | break; | |
927 | } | |
928 | } | |
f28e8eb3 | 929 | #endif |
252b5132 | 930 | if (IS_COMMENT (ch) |
62f65a7b DB |
931 | || IS_LINE_SEPARATOR (ch) |
932 | || IS_PARALLEL_SEPARATOR (ch)) | |
252b5132 RH |
933 | { |
934 | if (scrub_m68k_mri) | |
935 | { | |
936 | /* In MRI mode, we keep these spaces. */ | |
937 | UNGET (ch); | |
938 | PUT (' '); | |
939 | break; | |
940 | } | |
941 | goto recycle; | |
942 | } | |
943 | ||
944 | /* If we're in state 2 or 11, we've seen a non-white | |
945 | character followed by whitespace. If the next character | |
946 | is ':', this is whitespace after a label name which we | |
947 | normally must ignore. In MRI mode, though, spaces are | |
948 | not permitted between the label and the colon. */ | |
949 | if ((state == 2 || state == 11) | |
950 | && lex[ch] == LEX_IS_COLON | |
951 | && ! scrub_m68k_mri) | |
952 | { | |
953 | state = 1; | |
954 | PUT (ch); | |
955 | break; | |
956 | } | |
957 | ||
958 | switch (state) | |
959 | { | |
252b5132 RH |
960 | case 1: |
961 | /* We can arrive here if we leave a leading whitespace | |
962 | character at the beginning of a line. */ | |
963 | goto recycle; | |
964 | case 2: | |
965 | state = 3; | |
966 | if (to + 1 < toend) | |
967 | { | |
968 | /* Optimize common case by skipping UNGET/GET. */ | |
969 | PUT (' '); /* Sp after opco */ | |
970 | goto recycle; | |
971 | } | |
972 | UNGET (ch); | |
973 | PUT (' '); | |
974 | break; | |
975 | case 3: | |
40b36596 JM |
976 | #ifndef TC_KEEP_OPERAND_SPACES |
977 | /* For TI C6X, we keep these spaces as they may separate | |
978 | functional unit specifiers from operands. */ | |
252b5132 | 979 | if (scrub_m68k_mri) |
40b36596 | 980 | #endif |
252b5132 RH |
981 | { |
982 | /* In MRI mode, we keep these spaces. */ | |
983 | UNGET (ch); | |
984 | PUT (' '); | |
985 | break; | |
986 | } | |
987 | goto recycle; /* Sp in operands */ | |
988 | case 9: | |
989 | case 10: | |
40b36596 | 990 | #ifndef TC_KEEP_OPERAND_SPACES |
252b5132 | 991 | if (scrub_m68k_mri) |
40b36596 | 992 | #endif |
252b5132 RH |
993 | { |
994 | /* In MRI mode, we keep these spaces. */ | |
995 | state = 3; | |
996 | UNGET (ch); | |
997 | PUT (' '); | |
998 | break; | |
999 | } | |
1000 | state = 10; /* Sp after symbol char */ | |
1001 | goto recycle; | |
1002 | case 11: | |
abd63a32 | 1003 | if (LABELS_WITHOUT_COLONS || flag_m68k_mri) |
252b5132 RH |
1004 | state = 1; |
1005 | else | |
1006 | { | |
1007 | /* We know that ch is not ':', since we tested that | |
b1ac4c66 AM |
1008 | case above. Therefore this is not a label, so it |
1009 | must be the opcode, and we've just seen the | |
1010 | whitespace after it. */ | |
252b5132 RH |
1011 | state = 3; |
1012 | } | |
1013 | UNGET (ch); | |
1014 | PUT (' '); /* Sp after label definition. */ | |
1015 | break; | |
1016 | default: | |
1017 | BAD_CASE (state); | |
1018 | } | |
1019 | break; | |
1020 | ||
1021 | case LEX_IS_TWOCHAR_COMMENT_1ST: | |
1022 | ch2 = GET (); | |
1023 | if (ch2 == '*') | |
1024 | { | |
1025 | for (;;) | |
1026 | { | |
1027 | do | |
1028 | { | |
1029 | ch2 = GET (); | |
1030 | if (ch2 != EOF && IS_NEWLINE (ch2)) | |
1031 | add_newlines++; | |
1032 | } | |
1033 | while (ch2 != EOF && ch2 != '*'); | |
1034 | ||
1035 | while (ch2 == '*') | |
1036 | ch2 = GET (); | |
1037 | ||
1038 | if (ch2 == EOF || ch2 == '/') | |
1039 | break; | |
1040 | ||
1041 | /* This UNGET will ensure that we count newlines | |
b1ac4c66 | 1042 | correctly. */ |
252b5132 RH |
1043 | UNGET (ch2); |
1044 | } | |
1045 | ||
1046 | if (ch2 == EOF) | |
1047 | as_warn (_("end of file in multiline comment")); | |
1048 | ||
1049 | ch = ' '; | |
1050 | goto recycle; | |
1051 | } | |
800eeca4 JW |
1052 | #ifdef DOUBLESLASH_LINE_COMMENTS |
1053 | else if (ch2 == '/') | |
1054 | { | |
1055 | do | |
1056 | { | |
1057 | ch = GET (); | |
1058 | } | |
1059 | while (ch != EOF && !IS_NEWLINE (ch)); | |
1060 | if (ch == EOF) | |
1061 | as_warn ("end of file in comment; newline inserted"); | |
1062 | state = 0; | |
1063 | PUT ('\n'); | |
1064 | break; | |
1065 | } | |
1066 | #endif | |
252b5132 RH |
1067 | else |
1068 | { | |
1069 | if (ch2 != EOF) | |
1070 | UNGET (ch2); | |
1071 | if (state == 9 || state == 10) | |
1072 | state = 3; | |
1073 | PUT (ch); | |
1074 | } | |
1075 | break; | |
1076 | ||
1077 | case LEX_IS_STRINGQUOTE: | |
c9c5dcda | 1078 | quotechar = ch; |
252b5132 RH |
1079 | if (state == 10) |
1080 | { | |
204cd129 | 1081 | /* Preserve the whitespace in foo "bar". */ |
252b5132 RH |
1082 | UNGET (ch); |
1083 | state = 3; | |
1084 | PUT (' '); | |
1085 | ||
1086 | /* PUT didn't jump out. We could just break, but we | |
b1ac4c66 | 1087 | know what will happen, so optimize a bit. */ |
252b5132 RH |
1088 | ch = GET (); |
1089 | old_state = 3; | |
1090 | } | |
1091 | else if (state == 9) | |
1092 | old_state = 3; | |
1093 | else | |
1094 | old_state = state; | |
1095 | state = 5; | |
1096 | PUT (ch); | |
1097 | break; | |
1098 | ||
252b5132 | 1099 | case LEX_IS_ONECHAR_QUOTE: |
c0a139c7 NC |
1100 | #ifdef H_TICK_HEX |
1101 | if (state == 9 && enable_h_tick_hex) | |
c54b5932 DD |
1102 | { |
1103 | char c; | |
1104 | ||
1105 | c = GET (); | |
1106 | as_warn ("'%c found after symbol", c); | |
1107 | UNGET (c); | |
1108 | } | |
c0a139c7 | 1109 | #endif |
252b5132 RH |
1110 | if (state == 10) |
1111 | { | |
204cd129 | 1112 | /* Preserve the whitespace in foo 'b'. */ |
252b5132 RH |
1113 | UNGET (ch); |
1114 | state = 3; | |
1115 | PUT (' '); | |
1116 | break; | |
1117 | } | |
1118 | ch = GET (); | |
1119 | if (ch == EOF) | |
1120 | { | |
1121 | as_warn (_("end of file after a one-character quote; \\0 inserted")); | |
1122 | ch = 0; | |
1123 | } | |
1124 | if (ch == '\\') | |
1125 | { | |
1126 | ch = GET (); | |
1127 | if (ch == EOF) | |
1128 | { | |
1129 | as_warn (_("end of file in escape character")); | |
1130 | ch = '\\'; | |
1131 | } | |
1132 | else | |
1133 | ch = process_escape (ch); | |
1134 | } | |
1135 | sprintf (out_buf, "%d", (int) (unsigned char) ch); | |
1136 | ||
1137 | /* None of these 'x constants for us. We want 'x'. */ | |
1138 | if ((ch = GET ()) != '\'') | |
1139 | { | |
1140 | #ifdef REQUIRE_CHAR_CLOSE_QUOTE | |
0e389e77 | 1141 | as_warn (_("missing close quote; (assumed)")); |
252b5132 RH |
1142 | #else |
1143 | if (ch != EOF) | |
1144 | UNGET (ch); | |
1145 | #endif | |
1146 | } | |
1147 | if (strlen (out_buf) == 1) | |
1148 | { | |
1149 | PUT (out_buf[0]); | |
1150 | break; | |
1151 | } | |
1152 | if (state == 9) | |
1153 | old_state = 3; | |
1154 | else | |
1155 | old_state = state; | |
1156 | state = -1; | |
1157 | out_string = out_buf; | |
1158 | PUT (*out_string++); | |
1159 | break; | |
252b5132 RH |
1160 | |
1161 | case LEX_IS_COLON: | |
f28e8eb3 | 1162 | #ifdef KEEP_WHITE_AROUND_COLON |
30a2b4ef | 1163 | state = 9; |
f28e8eb3 | 1164 | #else |
252b5132 RH |
1165 | if (state == 9 || state == 10) |
1166 | state = 3; | |
1167 | else if (state != 3) | |
1168 | state = 1; | |
f28e8eb3 | 1169 | #endif |
252b5132 RH |
1170 | PUT (ch); |
1171 | break; | |
1172 | ||
1173 | case LEX_IS_NEWLINE: | |
1174 | /* Roll out a bunch of newlines from inside comments, etc. */ | |
1175 | if (add_newlines) | |
1176 | { | |
1177 | --add_newlines; | |
1178 | UNGET (ch); | |
1179 | } | |
3ee4defc | 1180 | /* Fall through. */ |
252b5132 RH |
1181 | |
1182 | case LEX_IS_LINE_SEPARATOR: | |
1183 | state = 0; | |
1184 | PUT (ch); | |
1185 | break; | |
1186 | ||
62f65a7b DB |
1187 | case LEX_IS_PARALLEL_SEPARATOR: |
1188 | state = 1; | |
1189 | PUT (ch); | |
1190 | break; | |
1191 | ||
252b5132 RH |
1192 | #ifdef TC_V850 |
1193 | case LEX_IS_DOUBLEDASH_1ST: | |
30a2b4ef | 1194 | ch2 = GET (); |
252b5132 RH |
1195 | if (ch2 != '-') |
1196 | { | |
0146fc9d NC |
1197 | if (ch2 != EOF) |
1198 | UNGET (ch2); | |
252b5132 RH |
1199 | goto de_fault; |
1200 | } | |
3ee4defc | 1201 | /* Read and skip to end of line. */ |
252b5132 RH |
1202 | do |
1203 | { | |
1204 | ch = GET (); | |
1205 | } | |
1206 | while (ch != EOF && ch != '\n'); | |
204cd129 | 1207 | |
252b5132 | 1208 | if (ch == EOF) |
204cd129 NC |
1209 | as_warn (_("end of file in comment; newline inserted")); |
1210 | ||
252b5132 RH |
1211 | state = 0; |
1212 | PUT ('\n'); | |
1213 | break; | |
3ee4defc | 1214 | #endif |
f28e8eb3 | 1215 | #ifdef DOUBLEBAR_PARALLEL |
252b5132 | 1216 | case LEX_IS_DOUBLEBAR_1ST: |
30a2b4ef | 1217 | ch2 = GET (); |
83bd7402 NC |
1218 | if (ch2 != EOF) |
1219 | UNGET (ch2); | |
252b5132 | 1220 | if (ch2 != '|') |
204cd129 NC |
1221 | goto de_fault; |
1222 | ||
b1ac4c66 AM |
1223 | /* Handle '||' in two states as invoking PUT twice might |
1224 | result in the first one jumping out of this loop. We'd | |
1225 | then lose track of the state and one '|' char. */ | |
1226 | state = 13; | |
252b5132 RH |
1227 | PUT ('|'); |
1228 | break; | |
3ee4defc | 1229 | #endif |
252b5132 RH |
1230 | case LEX_IS_LINE_COMMENT_START: |
1231 | /* FIXME-someday: The two character comment stuff was badly | |
1232 | thought out. On i386, we want '/' as line comment start | |
1233 | AND we want C style comments. hence this hack. The | |
1234 | whole lexical process should be reworked. xoxorich. */ | |
1235 | if (ch == '/') | |
1236 | { | |
1237 | ch2 = GET (); | |
1238 | if (ch2 == '*') | |
1239 | { | |
1240 | old_state = 3; | |
1241 | state = -2; | |
1242 | break; | |
1243 | } | |
69ace220 | 1244 | else if (ch2 != EOF) |
252b5132 RH |
1245 | { |
1246 | UNGET (ch2); | |
1247 | } | |
204cd129 | 1248 | } |
252b5132 RH |
1249 | |
1250 | if (state == 0 || state == 1) /* Only comment at start of line. */ | |
1251 | { | |
1252 | int startch; | |
1253 | ||
1254 | startch = ch; | |
1255 | ||
1256 | do | |
1257 | { | |
1258 | ch = GET (); | |
1259 | } | |
1260 | while (ch != EOF && IS_WHITESPACE (ch)); | |
204cd129 | 1261 | |
252b5132 RH |
1262 | if (ch == EOF) |
1263 | { | |
1264 | as_warn (_("end of file in comment; newline inserted")); | |
1265 | PUT ('\n'); | |
1266 | break; | |
1267 | } | |
204cd129 | 1268 | |
252b5132 RH |
1269 | if (ch < '0' || ch > '9' || state != 0 || startch != '#') |
1270 | { | |
1271 | /* Not a cpp line. */ | |
1272 | while (ch != EOF && !IS_NEWLINE (ch)) | |
1273 | ch = GET (); | |
1274 | if (ch == EOF) | |
cf3f45fa AM |
1275 | { |
1276 | as_warn (_("end of file in comment; newline inserted")); | |
1277 | PUT ('\n'); | |
1278 | } | |
1279 | else /* IS_NEWLINE (ch) */ | |
1280 | { | |
1281 | /* To process non-zero add_newlines. */ | |
1282 | UNGET (ch); | |
1283 | } | |
252b5132 | 1284 | state = 0; |
252b5132 RH |
1285 | break; |
1286 | } | |
3ee4defc | 1287 | /* Looks like `# 123 "filename"' from cpp. */ |
252b5132 RH |
1288 | UNGET (ch); |
1289 | old_state = 4; | |
1290 | state = -1; | |
1291 | if (scrub_m68k_mri) | |
93e914b2 | 1292 | out_string = "\tlinefile "; |
252b5132 | 1293 | else |
93e914b2 | 1294 | out_string = "\t.linefile "; |
252b5132 RH |
1295 | PUT (*out_string++); |
1296 | break; | |
1297 | } | |
1298 | ||
1299 | #ifdef TC_D10V | |
1300 | /* All insns end in a char for which LEX_IS_SYMBOL_COMPONENT is true. | |
1301 | Trap is the only short insn that has a first operand that is | |
1302 | neither register nor label. | |
1303 | We must prevent exef0f ||trap #1 to degenerate to exef0f ||trap#1 . | |
30a2b4ef KH |
1304 | We can't make '#' LEX_IS_SYMBOL_COMPONENT because it is |
1305 | already LEX_IS_LINE_COMMENT_START. However, it is the | |
1306 | only character in line_comment_chars for d10v, hence we | |
1307 | can recognize it as such. */ | |
252b5132 RH |
1308 | /* An alternative approach would be to reset the state to 1 when |
1309 | we see '||', '<'- or '->', but that seems to be overkill. */ | |
30a2b4ef KH |
1310 | if (state == 10) |
1311 | PUT (' '); | |
252b5132 RH |
1312 | #endif |
1313 | /* We have a line comment character which is not at the | |
1314 | start of a line. If this is also a normal comment | |
1315 | character, fall through. Otherwise treat it as a default | |
1316 | character. */ | |
1317 | if (strchr (tc_comment_chars, ch) == NULL | |
1318 | && (! scrub_m68k_mri | |
1319 | || (ch != '!' && ch != '*'))) | |
1320 | goto de_fault; | |
1321 | if (scrub_m68k_mri | |
1322 | && (ch == '!' || ch == '*' || ch == '#') | |
1323 | && state != 1 | |
1324 | && state != 10) | |
1325 | goto de_fault; | |
1326 | /* Fall through. */ | |
1327 | case LEX_IS_COMMENT_START: | |
1328 | #if defined TC_ARM && defined OBJ_ELF | |
1329 | /* On the ARM, `@' is the comment character. | |
1330 | Unfortunately this is also a special character in ELF .symver | |
30a2b4ef KH |
1331 | directives (and .type, though we deal with those another way). |
1332 | So we check if this line is such a directive, and treat | |
1333 | the character as default if so. This is a hack. */ | |
252b5132 RH |
1334 | if ((symver_state != NULL) && (*symver_state == 0)) |
1335 | goto de_fault; | |
4c400d5e | 1336 | #endif |
2a676888 | 1337 | |
750e4bf7 JB |
1338 | /* Care is needed not to damage occurrences of \<comment-char> |
1339 | by stripping the <comment-char> onwards. Yuck. */ | |
ab1fadc6 | 1340 | if ((to > tostart ? to[-1] : last_char) == '\\') |
750e4bf7 | 1341 | /* Do not treat the <comment-char> as a start-of-comment. */ |
2a676888 | 1342 | goto de_fault; |
2a676888 | 1343 | |
4c400d5e AM |
1344 | #ifdef WARN_COMMENTS |
1345 | if (!found_comment) | |
3b4dbbbf | 1346 | found_comment_file = as_where (&found_comment); |
252b5132 RH |
1347 | #endif |
1348 | do | |
1349 | { | |
1350 | ch = GET (); | |
1351 | } | |
1352 | while (ch != EOF && !IS_NEWLINE (ch)); | |
1353 | if (ch == EOF) | |
1354 | as_warn (_("end of file in comment; newline inserted")); | |
1355 | state = 0; | |
1356 | PUT ('\n'); | |
1357 | break; | |
1358 | ||
c54b5932 DD |
1359 | #ifdef H_TICK_HEX |
1360 | case LEX_IS_H: | |
1361 | /* Look for strings like H'[0-9A-Fa-f] and if found, replace | |
1362 | the H' with 0x to make them gas-style hex characters. */ | |
1363 | if (enable_h_tick_hex) | |
1364 | { | |
1365 | char quot; | |
1366 | ||
1367 | quot = GET (); | |
1368 | if (quot == '\'') | |
1369 | { | |
1370 | UNGET ('x'); | |
1371 | ch = '0'; | |
1372 | } | |
1373 | else | |
1374 | UNGET (quot); | |
1375 | } | |
c54b5932 | 1376 | #endif |
fcddde94 | 1377 | /* Fall through. */ |
c54b5932 | 1378 | |
252b5132 RH |
1379 | case LEX_IS_SYMBOL_COMPONENT: |
1380 | if (state == 10) | |
1381 | { | |
1382 | /* This is a symbol character following another symbol | |
1383 | character, with whitespace in between. We skipped | |
1384 | the whitespace earlier, so output it now. */ | |
1385 | UNGET (ch); | |
1386 | state = 3; | |
1387 | PUT (' '); | |
1388 | break; | |
1389 | } | |
1390 | ||
3c9b82ba NC |
1391 | #ifdef TC_Z80 |
1392 | /* "af'" is a symbol containing '\''. */ | |
34bca508 | 1393 | if (state == 3 && (ch == 'a' || ch == 'A')) |
3c9b82ba NC |
1394 | { |
1395 | state = 16; | |
1396 | PUT (ch); | |
1397 | ch = GET (); | |
34bca508 | 1398 | if (ch == 'f' || ch == 'F') |
3c9b82ba NC |
1399 | { |
1400 | state = 17; | |
1401 | PUT (ch); | |
1402 | break; | |
1403 | } | |
1404 | else | |
1405 | { | |
1406 | state = 9; | |
536695d0 | 1407 | if (ch == EOF || !IS_SYMBOL_COMPONENT (ch)) |
3c9b82ba | 1408 | { |
0146fc9d NC |
1409 | if (ch != EOF) |
1410 | UNGET (ch); | |
3c9b82ba NC |
1411 | break; |
1412 | } | |
1413 | } | |
1414 | } | |
1415 | #endif | |
252b5132 RH |
1416 | if (state == 3) |
1417 | state = 9; | |
1418 | ||
1419 | /* This is a common case. Quickly copy CH and all the | |
b1ac4c66 | 1420 | following symbol component or normal characters. */ |
252b5132 RH |
1421 | if (to + 1 < toend |
1422 | && mri_state == NULL | |
1423 | #if defined TC_ARM && defined OBJ_ELF | |
1424 | && symver_state == NULL | |
1425 | #endif | |
1426 | ) | |
1427 | { | |
1428 | char *s; | |
39a45edc | 1429 | ptrdiff_t len; |
252b5132 RH |
1430 | |
1431 | for (s = from; s < fromend; s++) | |
1432 | { | |
1433 | int type; | |
1434 | ||
30a2b4ef | 1435 | ch2 = *(unsigned char *) s; |
252b5132 RH |
1436 | type = lex[ch2]; |
1437 | if (type != 0 | |
1438 | && type != LEX_IS_SYMBOL_COMPONENT) | |
1439 | break; | |
1440 | } | |
204cd129 | 1441 | |
252b5132 | 1442 | if (s > from) |
204cd129 NC |
1443 | /* Handle the last character normally, for |
1444 | simplicity. */ | |
1445 | --s; | |
1446 | ||
252b5132 | 1447 | len = s - from; |
204cd129 | 1448 | |
252b5132 RH |
1449 | if (len > (toend - to) - 1) |
1450 | len = (toend - to) - 1; | |
204cd129 | 1451 | |
252b5132 RH |
1452 | if (len > 0) |
1453 | { | |
1454 | PUT (ch); | |
518051dc BE |
1455 | memcpy (to, from, len); |
1456 | to += len; | |
1457 | from += len; | |
37b75c0c AM |
1458 | if (to >= toend) |
1459 | goto tofull; | |
252b5132 RH |
1460 | ch = GET (); |
1461 | } | |
1462 | } | |
1463 | ||
1464 | /* Fall through. */ | |
1465 | default: | |
1466 | de_fault: | |
1467 | /* Some relatively `normal' character. */ | |
1468 | if (state == 0) | |
1469 | { | |
9a124774 | 1470 | state = 11; /* Now seeing label definition. */ |
252b5132 RH |
1471 | } |
1472 | else if (state == 1) | |
1473 | { | |
9a124774 | 1474 | state = 2; /* Ditto. */ |
252b5132 RH |
1475 | } |
1476 | else if (state == 9) | |
1477 | { | |
2cdb18a7 | 1478 | if (!IS_SYMBOL_COMPONENT (ch)) |
252b5132 RH |
1479 | state = 3; |
1480 | } | |
1481 | else if (state == 10) | |
1482 | { | |
c5c834aa AH |
1483 | if (ch == '\\') |
1484 | { | |
1485 | /* Special handling for backslash: a backslash may | |
1486 | be the beginning of a formal parameter (of a | |
1487 | macro) following another symbol character, with | |
1488 | whitespace in between. If that is the case, we | |
1489 | output a space before the parameter. Strictly | |
1490 | speaking, correct handling depends upon what the | |
1491 | macro parameter expands into; if the parameter | |
1492 | expands into something which does not start with | |
1493 | an operand character, then we don't want to keep | |
1494 | the space. We don't have enough information to | |
1495 | make the right choice, so here we are making the | |
1496 | choice which is more likely to be correct. */ | |
1740b7b1 NS |
1497 | if (to + 1 >= toend) |
1498 | { | |
1499 | /* If we're near the end of the buffer, save the | |
1500 | character for the next time round. Otherwise | |
1501 | we'll lose our state. */ | |
1502 | UNGET (ch); | |
1503 | goto tofull; | |
1504 | } | |
1505 | *to++ = ' '; | |
c5c834aa AH |
1506 | } |
1507 | ||
252b5132 RH |
1508 | state = 3; |
1509 | } | |
1510 | PUT (ch); | |
1511 | break; | |
1512 | } | |
1513 | } | |
1514 | ||
1515 | /*NOTREACHED*/ | |
1516 | ||
1517 | fromeof: | |
1518 | /* We have reached the end of the input. */ | |
ab1fadc6 AM |
1519 | if (to > tostart) |
1520 | last_char = to[-1]; | |
252b5132 RH |
1521 | return to - tostart; |
1522 | ||
1523 | tofull: | |
1524 | /* The output buffer is full. Save any input we have not yet | |
1525 | processed. */ | |
1526 | if (fromend > from) | |
1527 | { | |
2b47531b | 1528 | saved_input = from; |
252b5132 RH |
1529 | saved_input_len = fromend - from; |
1530 | } | |
1531 | else | |
2b47531b ILT |
1532 | saved_input = NULL; |
1533 | ||
ab1fadc6 AM |
1534 | if (to > tostart) |
1535 | last_char = to[-1]; | |
252b5132 RH |
1536 | return to - tostart; |
1537 | } |