| 1 | /* This is the Assembler Pre-Processor |
| 2 | Copyright (C) 1987, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GAS, the GNU Assembler. |
| 6 | |
| 7 | GAS is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GAS is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GAS; see the file COPYING. If not, write to the Free |
| 19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 20 | 02111-1307, USA. */ |
| 21 | |
| 22 | /* Modified by Allen Wirfs-Brock, Instantiations Inc 2/90 */ |
| 23 | /* App, the assembler pre-processor. This pre-processor strips out excess |
| 24 | spaces, turns single-quoted characters into a decimal constant, and turns |
| 25 | # <number> <filename> <garbage> into a .line <number>\n.file <filename> |
| 26 | pair. This needs better error-handling. */ |
| 27 | |
| 28 | #include <stdio.h> |
| 29 | #include "as.h" /* For BAD_CASE() only */ |
| 30 | |
| 31 | #if (__STDC__ != 1) |
| 32 | #ifndef const |
| 33 | #define const /* empty */ |
| 34 | #endif |
| 35 | #endif |
| 36 | |
| 37 | #ifdef TC_M68K |
| 38 | /* Whether we are scrubbing in m68k MRI mode. This is different from |
| 39 | flag_m68k_mri, because the two flags will be affected by the .mri |
| 40 | pseudo-op at different times. */ |
| 41 | static int scrub_m68k_mri; |
| 42 | #else |
| 43 | #define scrub_m68k_mri 0 |
| 44 | #endif |
| 45 | |
| 46 | /* The pseudo-op which switches in and out of MRI mode. See the |
| 47 | comment in do_scrub_chars. */ |
| 48 | static const char mri_pseudo[] = ".mri 0"; |
| 49 | |
| 50 | #if defined TC_ARM && defined OBJ_ELF |
| 51 | /* The pseudo-op for which we need to special-case `@' characters. |
| 52 | See the comment in do_scrub_chars. */ |
| 53 | static const char symver_pseudo[] = ".symver"; |
| 54 | static const char * symver_state; |
| 55 | #endif |
| 56 | |
| 57 | static char lex[256]; |
| 58 | static const char symbol_chars[] = |
| 59 | "$._ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; |
| 60 | |
| 61 | #define LEX_IS_SYMBOL_COMPONENT 1 |
| 62 | #define LEX_IS_WHITESPACE 2 |
| 63 | #define LEX_IS_LINE_SEPARATOR 3 |
| 64 | #define LEX_IS_COMMENT_START 4 |
| 65 | #define LEX_IS_LINE_COMMENT_START 5 |
| 66 | #define LEX_IS_TWOCHAR_COMMENT_1ST 6 |
| 67 | #define LEX_IS_STRINGQUOTE 8 |
| 68 | #define LEX_IS_COLON 9 |
| 69 | #define LEX_IS_NEWLINE 10 |
| 70 | #define LEX_IS_ONECHAR_QUOTE 11 |
| 71 | #ifdef TC_V850 |
| 72 | #define LEX_IS_DOUBLEDASH_1ST 12 |
| 73 | #endif |
| 74 | #ifdef TC_M32R |
| 75 | #define DOUBLEBAR_PARALLEL |
| 76 | #endif |
| 77 | #ifdef DOUBLEBAR_PARALLEL |
| 78 | #define LEX_IS_DOUBLEBAR_1ST 13 |
| 79 | #endif |
| 80 | #define IS_SYMBOL_COMPONENT(c) (lex[c] == LEX_IS_SYMBOL_COMPONENT) |
| 81 | #define IS_WHITESPACE(c) (lex[c] == LEX_IS_WHITESPACE) |
| 82 | #define IS_LINE_SEPARATOR(c) (lex[c] == LEX_IS_LINE_SEPARATOR) |
| 83 | #define IS_COMMENT(c) (lex[c] == LEX_IS_COMMENT_START) |
| 84 | #define IS_LINE_COMMENT(c) (lex[c] == LEX_IS_LINE_COMMENT_START) |
| 85 | #define IS_NEWLINE(c) (lex[c] == LEX_IS_NEWLINE) |
| 86 | |
| 87 | static int process_escape PARAMS ((int)); |
| 88 | |
| 89 | /* FIXME-soon: The entire lexer/parser thingy should be |
| 90 | built statically at compile time rather than dynamically |
| 91 | each and every time the assembler is run. xoxorich. */ |
| 92 | |
| 93 | void |
| 94 | do_scrub_begin (m68k_mri) |
| 95 | int m68k_mri ATTRIBUTE_UNUSED; |
| 96 | { |
| 97 | const char *p; |
| 98 | int c; |
| 99 | |
| 100 | lex[' '] = LEX_IS_WHITESPACE; |
| 101 | lex['\t'] = LEX_IS_WHITESPACE; |
| 102 | lex['\r'] = LEX_IS_WHITESPACE; |
| 103 | lex['\n'] = LEX_IS_NEWLINE; |
| 104 | lex[':'] = LEX_IS_COLON; |
| 105 | |
| 106 | #ifdef TC_M68K |
| 107 | scrub_m68k_mri = m68k_mri; |
| 108 | |
| 109 | if (! m68k_mri) |
| 110 | #endif |
| 111 | { |
| 112 | lex['"'] = LEX_IS_STRINGQUOTE; |
| 113 | |
| 114 | #if ! defined (TC_HPPA) && ! defined (TC_I370) |
| 115 | /* I370 uses single-quotes to delimit integer, float constants */ |
| 116 | lex['\''] = LEX_IS_ONECHAR_QUOTE; |
| 117 | #endif |
| 118 | |
| 119 | #ifdef SINGLE_QUOTE_STRINGS |
| 120 | lex['\''] = LEX_IS_STRINGQUOTE; |
| 121 | #endif |
| 122 | } |
| 123 | |
| 124 | /* Note: if any other character can be LEX_IS_STRINGQUOTE, the loop |
| 125 | in state 5 of do_scrub_chars must be changed. */ |
| 126 | |
| 127 | /* Note that these override the previous defaults, e.g. if ';' is a |
| 128 | comment char, then it isn't a line separator. */ |
| 129 | for (p = symbol_chars; *p; ++p) |
| 130 | { |
| 131 | lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT; |
| 132 | } /* declare symbol characters */ |
| 133 | |
| 134 | for (c = 128; c < 256; ++c) |
| 135 | lex[c] = LEX_IS_SYMBOL_COMPONENT; |
| 136 | |
| 137 | #ifdef tc_symbol_chars |
| 138 | /* This macro permits the processor to specify all characters which |
| 139 | may appears in an operand. This will prevent the scrubber from |
| 140 | discarding meaningful whitespace in certain cases. The i386 |
| 141 | backend uses this to support prefixes, which can confuse the |
| 142 | scrubber as to whether it is parsing operands or opcodes. */ |
| 143 | for (p = tc_symbol_chars; *p; ++p) |
| 144 | lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT; |
| 145 | #endif |
| 146 | |
| 147 | /* The m68k backend wants to be able to change comment_chars. */ |
| 148 | #ifndef tc_comment_chars |
| 149 | #define tc_comment_chars comment_chars |
| 150 | #endif |
| 151 | for (p = tc_comment_chars; *p; p++) |
| 152 | { |
| 153 | lex[(unsigned char) *p] = LEX_IS_COMMENT_START; |
| 154 | } /* declare comment chars */ |
| 155 | |
| 156 | for (p = line_comment_chars; *p; p++) |
| 157 | { |
| 158 | lex[(unsigned char) *p] = LEX_IS_LINE_COMMENT_START; |
| 159 | } /* declare line comment chars */ |
| 160 | |
| 161 | for (p = line_separator_chars; *p; p++) |
| 162 | { |
| 163 | lex[(unsigned char) *p] = LEX_IS_LINE_SEPARATOR; |
| 164 | } /* declare line separators */ |
| 165 | |
| 166 | /* Only allow slash-star comments if slash is not in use. |
| 167 | FIXME: This isn't right. We should always permit them. */ |
| 168 | if (lex['/'] == 0) |
| 169 | { |
| 170 | lex['/'] = LEX_IS_TWOCHAR_COMMENT_1ST; |
| 171 | } |
| 172 | |
| 173 | #ifdef TC_M68K |
| 174 | if (m68k_mri) |
| 175 | { |
| 176 | lex['\''] = LEX_IS_STRINGQUOTE; |
| 177 | lex[';'] = LEX_IS_COMMENT_START; |
| 178 | lex['*'] = LEX_IS_LINE_COMMENT_START; |
| 179 | /* The MRI documentation says '!' is LEX_IS_COMMENT_START, but |
| 180 | then it can't be used in an expression. */ |
| 181 | lex['!'] = LEX_IS_LINE_COMMENT_START; |
| 182 | } |
| 183 | #endif |
| 184 | |
| 185 | #ifdef TC_V850 |
| 186 | lex['-'] = LEX_IS_DOUBLEDASH_1ST; |
| 187 | #endif |
| 188 | #ifdef DOUBLEBAR_PARALLEL |
| 189 | lex['|'] = LEX_IS_DOUBLEBAR_1ST; |
| 190 | #endif |
| 191 | #ifdef TC_D30V |
| 192 | /* must do this is we want VLIW instruction with "->" or "<-" */ |
| 193 | lex['-'] = LEX_IS_SYMBOL_COMPONENT; |
| 194 | #endif |
| 195 | } /* do_scrub_begin() */ |
| 196 | |
| 197 | /* Saved state of the scrubber */ |
| 198 | static int state; |
| 199 | static int old_state; |
| 200 | static char *out_string; |
| 201 | static char out_buf[20]; |
| 202 | static int add_newlines; |
| 203 | static char *saved_input; |
| 204 | static int saved_input_len; |
| 205 | static char input_buffer[32 * 1024]; |
| 206 | static const char *mri_state; |
| 207 | static char mri_last_ch; |
| 208 | |
| 209 | /* Data structure for saving the state of app across #include's. Note that |
| 210 | app is called asynchronously to the parsing of the .include's, so our |
| 211 | state at the time .include is interpreted is completely unrelated. |
| 212 | That's why we have to save it all. */ |
| 213 | |
| 214 | struct app_save |
| 215 | { |
| 216 | int state; |
| 217 | int old_state; |
| 218 | char * out_string; |
| 219 | char out_buf[sizeof (out_buf)]; |
| 220 | int add_newlines; |
| 221 | char * saved_input; |
| 222 | int saved_input_len; |
| 223 | #ifdef TC_M68K |
| 224 | int scrub_m68k_mri; |
| 225 | #endif |
| 226 | const char * mri_state; |
| 227 | char mri_last_ch; |
| 228 | #if defined TC_ARM && defined OBJ_ELF |
| 229 | const char * symver_state; |
| 230 | #endif |
| 231 | }; |
| 232 | |
| 233 | char * |
| 234 | app_push () |
| 235 | { |
| 236 | register struct app_save *saved; |
| 237 | |
| 238 | saved = (struct app_save *) xmalloc (sizeof (*saved)); |
| 239 | saved->state = state; |
| 240 | saved->old_state = old_state; |
| 241 | saved->out_string = out_string; |
| 242 | memcpy (saved->out_buf, out_buf, sizeof (out_buf)); |
| 243 | saved->add_newlines = add_newlines; |
| 244 | if (saved_input == NULL) |
| 245 | saved->saved_input = NULL; |
| 246 | else |
| 247 | { |
| 248 | saved->saved_input = xmalloc (saved_input_len); |
| 249 | memcpy (saved->saved_input, saved_input, saved_input_len); |
| 250 | saved->saved_input_len = saved_input_len; |
| 251 | } |
| 252 | #ifdef TC_M68K |
| 253 | saved->scrub_m68k_mri = scrub_m68k_mri; |
| 254 | #endif |
| 255 | saved->mri_state = mri_state; |
| 256 | saved->mri_last_ch = mri_last_ch; |
| 257 | #if defined TC_ARM && defined OBJ_ELF |
| 258 | saved->symver_state = symver_state; |
| 259 | #endif |
| 260 | |
| 261 | /* do_scrub_begin() is not useful, just wastes time. */ |
| 262 | |
| 263 | state = 0; |
| 264 | saved_input = NULL; |
| 265 | |
| 266 | return (char *) saved; |
| 267 | } |
| 268 | |
| 269 | void |
| 270 | app_pop (arg) |
| 271 | char *arg; |
| 272 | { |
| 273 | register struct app_save *saved = (struct app_save *) arg; |
| 274 | |
| 275 | /* There is no do_scrub_end (). */ |
| 276 | state = saved->state; |
| 277 | old_state = saved->old_state; |
| 278 | out_string = saved->out_string; |
| 279 | memcpy (out_buf, saved->out_buf, sizeof (out_buf)); |
| 280 | add_newlines = saved->add_newlines; |
| 281 | if (saved->saved_input == NULL) |
| 282 | saved_input = NULL; |
| 283 | else |
| 284 | { |
| 285 | assert (saved->saved_input_len <= (int) (sizeof input_buffer)); |
| 286 | memcpy (input_buffer, saved->saved_input, saved->saved_input_len); |
| 287 | saved_input = input_buffer; |
| 288 | saved_input_len = saved->saved_input_len; |
| 289 | free (saved->saved_input); |
| 290 | } |
| 291 | #ifdef TC_M68K |
| 292 | scrub_m68k_mri = saved->scrub_m68k_mri; |
| 293 | #endif |
| 294 | mri_state = saved->mri_state; |
| 295 | mri_last_ch = saved->mri_last_ch; |
| 296 | #if defined TC_ARM && defined OBJ_ELF |
| 297 | symver_state = saved->symver_state; |
| 298 | #endif |
| 299 | |
| 300 | free (arg); |
| 301 | } /* app_pop() */ |
| 302 | |
| 303 | /* @@ This assumes that \n &c are the same on host and target. This is not |
| 304 | necessarily true. */ |
| 305 | static int |
| 306 | process_escape (ch) |
| 307 | int ch; |
| 308 | { |
| 309 | switch (ch) |
| 310 | { |
| 311 | case 'b': |
| 312 | return '\b'; |
| 313 | case 'f': |
| 314 | return '\f'; |
| 315 | case 'n': |
| 316 | return '\n'; |
| 317 | case 'r': |
| 318 | return '\r'; |
| 319 | case 't': |
| 320 | return '\t'; |
| 321 | case '\'': |
| 322 | return '\''; |
| 323 | case '"': |
| 324 | return '\"'; |
| 325 | default: |
| 326 | return ch; |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | /* This function is called to process input characters. The GET |
| 331 | parameter is used to retrieve more input characters. GET should |
| 332 | set its parameter to point to a buffer, and return the length of |
| 333 | the buffer; it should return 0 at end of file. The scrubbed output |
| 334 | characters are put into the buffer starting at TOSTART; the TOSTART |
| 335 | buffer is TOLEN bytes in length. The function returns the number |
| 336 | of scrubbed characters put into TOSTART. This will be TOLEN unless |
| 337 | end of file was seen. This function is arranged as a state |
| 338 | machine, and saves its state so that it may return at any point. |
| 339 | This is the way the old code used to work. */ |
| 340 | |
| 341 | int |
| 342 | do_scrub_chars (get, tostart, tolen) |
| 343 | int (*get) PARAMS ((char *, int)); |
| 344 | char *tostart; |
| 345 | int tolen; |
| 346 | { |
| 347 | char *to = tostart; |
| 348 | char *toend = tostart + tolen; |
| 349 | char *from; |
| 350 | char *fromend; |
| 351 | int fromlen; |
| 352 | register int ch, ch2 = 0; |
| 353 | |
| 354 | /*State 0: beginning of normal line |
| 355 | 1: After first whitespace on line (flush more white) |
| 356 | 2: After first non-white (opcode) on line (keep 1white) |
| 357 | 3: after second white on line (into operands) (flush white) |
| 358 | 4: after putting out a .line, put out digits |
| 359 | 5: parsing a string, then go to old-state |
| 360 | 6: putting out \ escape in a "d string. |
| 361 | 7: After putting out a .appfile, put out string. |
| 362 | 8: After putting out a .appfile string, flush until newline. |
| 363 | 9: After seeing symbol char in state 3 (keep 1white after symchar) |
| 364 | 10: After seeing whitespace in state 9 (keep white before symchar) |
| 365 | 11: After seeing a symbol character in state 0 (eg a label definition) |
| 366 | -1: output string in out_string and go to the state in old_state |
| 367 | -2: flush text until a '*' '/' is seen, then go to state old_state |
| 368 | #ifdef TC_V850 |
| 369 | 12: After seeing a dash, looking for a second dash as a start of comment. |
| 370 | #endif |
| 371 | #ifdef DOUBLEBAR_PARALLEL |
| 372 | 13: After seeing a vertical bar, looking for a second vertical bar as a parallel expression seperator. |
| 373 | #endif |
| 374 | */ |
| 375 | |
| 376 | /* I added states 9 and 10 because the MIPS ECOFF assembler uses |
| 377 | constructs like ``.loc 1 20''. This was turning into ``.loc |
| 378 | 120''. States 9 and 10 ensure that a space is never dropped in |
| 379 | between characters which could appear in a identifier. Ian |
| 380 | Taylor, ian@cygnus.com. |
| 381 | |
| 382 | I added state 11 so that something like "Lfoo add %r25,%r26,%r27" works |
| 383 | correctly on the PA (and any other target where colons are optional). |
| 384 | Jeff Law, law@cs.utah.edu. |
| 385 | |
| 386 | I added state 13 so that something like "cmp r1, r2 || trap #1" does not |
| 387 | get squashed into "cmp r1,r2||trap#1", with the all important space |
| 388 | between the 'trap' and the '#1' being eliminated. nickc@cygnus.com */ |
| 389 | |
| 390 | /* This macro gets the next input character. */ |
| 391 | |
| 392 | #define GET() \ |
| 393 | (from < fromend \ |
| 394 | ? * (unsigned char *) (from++) \ |
| 395 | : (saved_input = NULL, \ |
| 396 | fromlen = (*get) (input_buffer, sizeof input_buffer), \ |
| 397 | from = input_buffer, \ |
| 398 | fromend = from + fromlen, \ |
| 399 | (fromlen == 0 \ |
| 400 | ? EOF \ |
| 401 | : * (unsigned char *) (from++)))) |
| 402 | |
| 403 | /* This macro pushes a character back on the input stream. */ |
| 404 | |
| 405 | #define UNGET(uch) (*--from = (uch)) |
| 406 | |
| 407 | /* This macro puts a character into the output buffer. If this |
| 408 | character fills the output buffer, this macro jumps to the label |
| 409 | TOFULL. We use this rather ugly approach because we need to |
| 410 | handle two different termination conditions: EOF on the input |
| 411 | stream, and a full output buffer. It would be simpler if we |
| 412 | always read in the entire input stream before processing it, but |
| 413 | I don't want to make such a significant change to the assembler's |
| 414 | memory usage. */ |
| 415 | |
| 416 | #define PUT(pch) \ |
| 417 | do \ |
| 418 | { \ |
| 419 | *to++ = (pch); \ |
| 420 | if (to >= toend) \ |
| 421 | goto tofull; \ |
| 422 | } \ |
| 423 | while (0) |
| 424 | |
| 425 | if (saved_input != NULL) |
| 426 | { |
| 427 | from = saved_input; |
| 428 | fromend = from + saved_input_len; |
| 429 | } |
| 430 | else |
| 431 | { |
| 432 | fromlen = (*get) (input_buffer, sizeof input_buffer); |
| 433 | if (fromlen == 0) |
| 434 | return 0; |
| 435 | from = input_buffer; |
| 436 | fromend = from + fromlen; |
| 437 | } |
| 438 | |
| 439 | while (1) |
| 440 | { |
| 441 | /* The cases in this switch end with continue, in order to |
| 442 | branch back to the top of this while loop and generate the |
| 443 | next output character in the appropriate state. */ |
| 444 | switch (state) |
| 445 | { |
| 446 | case -1: |
| 447 | ch = *out_string++; |
| 448 | if (*out_string == '\0') |
| 449 | { |
| 450 | state = old_state; |
| 451 | old_state = 3; |
| 452 | } |
| 453 | PUT (ch); |
| 454 | continue; |
| 455 | |
| 456 | case -2: |
| 457 | for (;;) |
| 458 | { |
| 459 | do |
| 460 | { |
| 461 | ch = GET (); |
| 462 | |
| 463 | if (ch == EOF) |
| 464 | { |
| 465 | as_warn (_("end of file in comment")); |
| 466 | goto fromeof; |
| 467 | } |
| 468 | |
| 469 | if (ch == '\n') |
| 470 | PUT ('\n'); |
| 471 | } |
| 472 | while (ch != '*'); |
| 473 | |
| 474 | while ((ch = GET ()) == '*') |
| 475 | ; |
| 476 | |
| 477 | if (ch == EOF) |
| 478 | { |
| 479 | as_warn (_("end of file in comment")); |
| 480 | goto fromeof; |
| 481 | } |
| 482 | |
| 483 | if (ch == '/') |
| 484 | break; |
| 485 | |
| 486 | UNGET (ch); |
| 487 | } |
| 488 | |
| 489 | state = old_state; |
| 490 | UNGET (' '); |
| 491 | continue; |
| 492 | |
| 493 | case 4: |
| 494 | ch = GET (); |
| 495 | if (ch == EOF) |
| 496 | goto fromeof; |
| 497 | else if (ch >= '0' && ch <= '9') |
| 498 | PUT (ch); |
| 499 | else |
| 500 | { |
| 501 | while (ch != EOF && IS_WHITESPACE (ch)) |
| 502 | ch = GET (); |
| 503 | if (ch == '"') |
| 504 | { |
| 505 | UNGET (ch); |
| 506 | if (scrub_m68k_mri) |
| 507 | out_string = "\n\tappfile "; |
| 508 | else |
| 509 | out_string = "\n\t.appfile "; |
| 510 | old_state = 7; |
| 511 | state = -1; |
| 512 | PUT (*out_string++); |
| 513 | } |
| 514 | else |
| 515 | { |
| 516 | while (ch != EOF && ch != '\n') |
| 517 | ch = GET (); |
| 518 | state = 0; |
| 519 | PUT (ch); |
| 520 | } |
| 521 | } |
| 522 | continue; |
| 523 | |
| 524 | case 5: |
| 525 | /* We are going to copy everything up to a quote character, |
| 526 | with special handling for a backslash. We try to |
| 527 | optimize the copying in the simple case without using the |
| 528 | GET and PUT macros. */ |
| 529 | { |
| 530 | char *s; |
| 531 | int len; |
| 532 | |
| 533 | for (s = from; s < fromend; s++) |
| 534 | { |
| 535 | ch = *s; |
| 536 | /* This condition must be changed if the type of any |
| 537 | other character can be LEX_IS_STRINGQUOTE. */ |
| 538 | if (ch == '\\' |
| 539 | || ch == '"' |
| 540 | || ch == '\'' |
| 541 | || ch == '\n') |
| 542 | break; |
| 543 | } |
| 544 | len = s - from; |
| 545 | if (len > toend - to) |
| 546 | len = toend - to; |
| 547 | if (len > 0) |
| 548 | { |
| 549 | memcpy (to, from, len); |
| 550 | to += len; |
| 551 | from += len; |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | ch = GET (); |
| 556 | if (ch == EOF) |
| 557 | { |
| 558 | as_warn (_("end of file in string: inserted '\"'")); |
| 559 | state = old_state; |
| 560 | UNGET ('\n'); |
| 561 | PUT ('"'); |
| 562 | } |
| 563 | else if (lex[ch] == LEX_IS_STRINGQUOTE) |
| 564 | { |
| 565 | state = old_state; |
| 566 | PUT (ch); |
| 567 | } |
| 568 | #ifndef NO_STRING_ESCAPES |
| 569 | else if (ch == '\\') |
| 570 | { |
| 571 | state = 6; |
| 572 | PUT (ch); |
| 573 | } |
| 574 | #endif |
| 575 | else if (scrub_m68k_mri && ch == '\n') |
| 576 | { |
| 577 | /* Just quietly terminate the string. This permits lines like |
| 578 | bne label loop if we haven't reach end yet |
| 579 | */ |
| 580 | state = old_state; |
| 581 | UNGET (ch); |
| 582 | PUT ('\''); |
| 583 | } |
| 584 | else |
| 585 | { |
| 586 | PUT (ch); |
| 587 | } |
| 588 | continue; |
| 589 | |
| 590 | case 6: |
| 591 | state = 5; |
| 592 | ch = GET (); |
| 593 | switch (ch) |
| 594 | { |
| 595 | /* Handle strings broken across lines, by turning '\n' into |
| 596 | '\\' and 'n'. */ |
| 597 | case '\n': |
| 598 | UNGET ('n'); |
| 599 | add_newlines++; |
| 600 | PUT ('\\'); |
| 601 | continue; |
| 602 | |
| 603 | case '"': |
| 604 | case '\\': |
| 605 | case 'b': |
| 606 | case 'f': |
| 607 | case 'n': |
| 608 | case 'r': |
| 609 | case 't': |
| 610 | case 'v': |
| 611 | case 'x': |
| 612 | case 'X': |
| 613 | case '0': |
| 614 | case '1': |
| 615 | case '2': |
| 616 | case '3': |
| 617 | case '4': |
| 618 | case '5': |
| 619 | case '6': |
| 620 | case '7': |
| 621 | break; |
| 622 | #if defined(IGNORE_NONSTANDARD_ESCAPES) | defined(ONLY_STANDARD_ESCAPES) |
| 623 | default: |
| 624 | as_warn (_("Unknown escape '\\%c' in string: Ignored"), ch); |
| 625 | break; |
| 626 | #else /* ONLY_STANDARD_ESCAPES */ |
| 627 | default: |
| 628 | /* Accept \x as x for any x */ |
| 629 | break; |
| 630 | #endif /* ONLY_STANDARD_ESCAPES */ |
| 631 | |
| 632 | case EOF: |
| 633 | as_warn (_("End of file in string: '\"' inserted")); |
| 634 | PUT ('"'); |
| 635 | continue; |
| 636 | } |
| 637 | PUT (ch); |
| 638 | continue; |
| 639 | |
| 640 | case 7: |
| 641 | ch = GET (); |
| 642 | state = 5; |
| 643 | old_state = 8; |
| 644 | if (ch == EOF) |
| 645 | goto fromeof; |
| 646 | PUT (ch); |
| 647 | continue; |
| 648 | |
| 649 | case 8: |
| 650 | do |
| 651 | ch = GET (); |
| 652 | while (ch != '\n' && ch != EOF); |
| 653 | if (ch == EOF) |
| 654 | goto fromeof; |
| 655 | state = 0; |
| 656 | PUT (ch); |
| 657 | continue; |
| 658 | } |
| 659 | |
| 660 | /* OK, we are somewhere in states 0 through 4 or 9 through 11 */ |
| 661 | |
| 662 | /* flushchar: */ |
| 663 | ch = GET (); |
| 664 | |
| 665 | recycle: |
| 666 | |
| 667 | #if defined TC_ARM && defined OBJ_ELF |
| 668 | /* We need to watch out for .symver directives. See the comment later |
| 669 | in this function. */ |
| 670 | if (symver_state == NULL) |
| 671 | { |
| 672 | if ((state == 0 || state == 1) && ch == symver_pseudo[0]) |
| 673 | symver_state = symver_pseudo + 1; |
| 674 | } |
| 675 | else |
| 676 | { |
| 677 | /* We advance to the next state if we find the right |
| 678 | character. */ |
| 679 | if (ch != '\0' && (*symver_state == ch)) |
| 680 | ++symver_state; |
| 681 | else if (*symver_state != '\0') |
| 682 | /* We did not get the expected character, or we didn't |
| 683 | get a valid terminating character after seeing the |
| 684 | entire pseudo-op, so we must go back to the beginning. */ |
| 685 | symver_state = NULL; |
| 686 | else |
| 687 | { |
| 688 | /* We've read the entire pseudo-op. If this is the end |
| 689 | of the line, go back to the beginning. */ |
| 690 | if (IS_NEWLINE (ch)) |
| 691 | symver_state = NULL; |
| 692 | } |
| 693 | } |
| 694 | #endif /* TC_ARM && OBJ_ELF */ |
| 695 | |
| 696 | #ifdef TC_M68K |
| 697 | /* We want to have pseudo-ops which control whether we are in |
| 698 | MRI mode or not. Unfortunately, since m68k MRI mode affects |
| 699 | the scrubber, that means that we need a special purpose |
| 700 | recognizer here. */ |
| 701 | if (mri_state == NULL) |
| 702 | { |
| 703 | if ((state == 0 || state == 1) |
| 704 | && ch == mri_pseudo[0]) |
| 705 | mri_state = mri_pseudo + 1; |
| 706 | } |
| 707 | else |
| 708 | { |
| 709 | /* We advance to the next state if we find the right |
| 710 | character, or if we need a space character and we get any |
| 711 | whitespace character, or if we need a '0' and we get a |
| 712 | '1' (this is so that we only need one state to handle |
| 713 | ``.mri 0'' and ``.mri 1''). */ |
| 714 | if (ch != '\0' |
| 715 | && (*mri_state == ch |
| 716 | || (*mri_state == ' ' |
| 717 | && lex[ch] == LEX_IS_WHITESPACE) |
| 718 | || (*mri_state == '0' |
| 719 | && ch == '1'))) |
| 720 | { |
| 721 | mri_last_ch = ch; |
| 722 | ++mri_state; |
| 723 | } |
| 724 | else if (*mri_state != '\0' |
| 725 | || (lex[ch] != LEX_IS_WHITESPACE |
| 726 | && lex[ch] != LEX_IS_NEWLINE)) |
| 727 | { |
| 728 | /* We did not get the expected character, or we didn't |
| 729 | get a valid terminating character after seeing the |
| 730 | entire pseudo-op, so we must go back to the |
| 731 | beginning. */ |
| 732 | mri_state = NULL; |
| 733 | } |
| 734 | else |
| 735 | { |
| 736 | /* We've read the entire pseudo-op. mips_last_ch is |
| 737 | either '0' or '1' indicating whether to enter or |
| 738 | leave MRI mode. */ |
| 739 | do_scrub_begin (mri_last_ch == '1'); |
| 740 | mri_state = NULL; |
| 741 | |
| 742 | /* We continue handling the character as usual. The |
| 743 | main gas reader must also handle the .mri pseudo-op |
| 744 | to control expression parsing and the like. */ |
| 745 | } |
| 746 | } |
| 747 | #endif |
| 748 | |
| 749 | if (ch == EOF) |
| 750 | { |
| 751 | if (state != 0) |
| 752 | { |
| 753 | as_warn (_("end of file not at end of a line; newline inserted")); |
| 754 | state = 0; |
| 755 | PUT ('\n'); |
| 756 | } |
| 757 | goto fromeof; |
| 758 | } |
| 759 | |
| 760 | switch (lex[ch]) |
| 761 | { |
| 762 | case LEX_IS_WHITESPACE: |
| 763 | do |
| 764 | { |
| 765 | ch = GET (); |
| 766 | } |
| 767 | while (ch != EOF && IS_WHITESPACE (ch)); |
| 768 | if (ch == EOF) |
| 769 | goto fromeof; |
| 770 | |
| 771 | if (state == 0) |
| 772 | { |
| 773 | /* Preserve a single whitespace character at the |
| 774 | beginning of a line. */ |
| 775 | state = 1; |
| 776 | UNGET (ch); |
| 777 | PUT (' '); |
| 778 | break; |
| 779 | } |
| 780 | |
| 781 | #ifdef KEEP_WHITE_AROUND_COLON |
| 782 | if (lex[ch] == LEX_IS_COLON) |
| 783 | { |
| 784 | /* only keep this white if there's no white *after* the colon */ |
| 785 | ch2 = GET (); |
| 786 | UNGET (ch2); |
| 787 | if (!IS_WHITESPACE (ch2)) |
| 788 | { |
| 789 | state = 9; |
| 790 | UNGET (ch); |
| 791 | PUT (' '); |
| 792 | break; |
| 793 | } |
| 794 | } |
| 795 | #endif |
| 796 | if (IS_COMMENT (ch) |
| 797 | || ch == '/' |
| 798 | || IS_LINE_SEPARATOR (ch)) |
| 799 | { |
| 800 | if (scrub_m68k_mri) |
| 801 | { |
| 802 | /* In MRI mode, we keep these spaces. */ |
| 803 | UNGET (ch); |
| 804 | PUT (' '); |
| 805 | break; |
| 806 | } |
| 807 | goto recycle; |
| 808 | } |
| 809 | |
| 810 | /* If we're in state 2 or 11, we've seen a non-white |
| 811 | character followed by whitespace. If the next character |
| 812 | is ':', this is whitespace after a label name which we |
| 813 | normally must ignore. In MRI mode, though, spaces are |
| 814 | not permitted between the label and the colon. */ |
| 815 | if ((state == 2 || state == 11) |
| 816 | && lex[ch] == LEX_IS_COLON |
| 817 | && ! scrub_m68k_mri) |
| 818 | { |
| 819 | state = 1; |
| 820 | PUT (ch); |
| 821 | break; |
| 822 | } |
| 823 | |
| 824 | switch (state) |
| 825 | { |
| 826 | case 0: |
| 827 | state++; |
| 828 | goto recycle; /* Punted leading sp */ |
| 829 | case 1: |
| 830 | /* We can arrive here if we leave a leading whitespace |
| 831 | character at the beginning of a line. */ |
| 832 | goto recycle; |
| 833 | case 2: |
| 834 | state = 3; |
| 835 | if (to + 1 < toend) |
| 836 | { |
| 837 | /* Optimize common case by skipping UNGET/GET. */ |
| 838 | PUT (' '); /* Sp after opco */ |
| 839 | goto recycle; |
| 840 | } |
| 841 | UNGET (ch); |
| 842 | PUT (' '); |
| 843 | break; |
| 844 | case 3: |
| 845 | if (scrub_m68k_mri) |
| 846 | { |
| 847 | /* In MRI mode, we keep these spaces. */ |
| 848 | UNGET (ch); |
| 849 | PUT (' '); |
| 850 | break; |
| 851 | } |
| 852 | goto recycle; /* Sp in operands */ |
| 853 | case 9: |
| 854 | case 10: |
| 855 | if (scrub_m68k_mri) |
| 856 | { |
| 857 | /* In MRI mode, we keep these spaces. */ |
| 858 | state = 3; |
| 859 | UNGET (ch); |
| 860 | PUT (' '); |
| 861 | break; |
| 862 | } |
| 863 | state = 10; /* Sp after symbol char */ |
| 864 | goto recycle; |
| 865 | case 11: |
| 866 | if (LABELS_WITHOUT_COLONS || flag_m68k_mri) |
| 867 | state = 1; |
| 868 | else |
| 869 | { |
| 870 | /* We know that ch is not ':', since we tested that |
| 871 | case above. Therefore this is not a label, so it |
| 872 | must be the opcode, and we've just seen the |
| 873 | whitespace after it. */ |
| 874 | state = 3; |
| 875 | } |
| 876 | UNGET (ch); |
| 877 | PUT (' '); /* Sp after label definition. */ |
| 878 | break; |
| 879 | default: |
| 880 | BAD_CASE (state); |
| 881 | } |
| 882 | break; |
| 883 | |
| 884 | case LEX_IS_TWOCHAR_COMMENT_1ST: |
| 885 | ch2 = GET (); |
| 886 | if (ch2 == '*') |
| 887 | { |
| 888 | for (;;) |
| 889 | { |
| 890 | do |
| 891 | { |
| 892 | ch2 = GET (); |
| 893 | if (ch2 != EOF && IS_NEWLINE (ch2)) |
| 894 | add_newlines++; |
| 895 | } |
| 896 | while (ch2 != EOF && ch2 != '*'); |
| 897 | |
| 898 | while (ch2 == '*') |
| 899 | ch2 = GET (); |
| 900 | |
| 901 | if (ch2 == EOF || ch2 == '/') |
| 902 | break; |
| 903 | |
| 904 | /* This UNGET will ensure that we count newlines |
| 905 | correctly. */ |
| 906 | UNGET (ch2); |
| 907 | } |
| 908 | |
| 909 | if (ch2 == EOF) |
| 910 | as_warn (_("end of file in multiline comment")); |
| 911 | |
| 912 | ch = ' '; |
| 913 | goto recycle; |
| 914 | } |
| 915 | #ifdef DOUBLESLASH_LINE_COMMENTS |
| 916 | else if (ch2 == '/') |
| 917 | { |
| 918 | do |
| 919 | { |
| 920 | ch = GET (); |
| 921 | } |
| 922 | while (ch != EOF && !IS_NEWLINE (ch)); |
| 923 | if (ch == EOF) |
| 924 | as_warn ("end of file in comment; newline inserted"); |
| 925 | state = 0; |
| 926 | PUT ('\n'); |
| 927 | break; |
| 928 | } |
| 929 | #endif |
| 930 | else |
| 931 | { |
| 932 | if (ch2 != EOF) |
| 933 | UNGET (ch2); |
| 934 | if (state == 9 || state == 10) |
| 935 | state = 3; |
| 936 | PUT (ch); |
| 937 | } |
| 938 | break; |
| 939 | |
| 940 | case LEX_IS_STRINGQUOTE: |
| 941 | if (state == 10) |
| 942 | { |
| 943 | /* Preserve the whitespace in foo "bar" */ |
| 944 | UNGET (ch); |
| 945 | state = 3; |
| 946 | PUT (' '); |
| 947 | |
| 948 | /* PUT didn't jump out. We could just break, but we |
| 949 | know what will happen, so optimize a bit. */ |
| 950 | ch = GET (); |
| 951 | old_state = 3; |
| 952 | } |
| 953 | else if (state == 9) |
| 954 | old_state = 3; |
| 955 | else |
| 956 | old_state = state; |
| 957 | state = 5; |
| 958 | PUT (ch); |
| 959 | break; |
| 960 | |
| 961 | #ifndef IEEE_STYLE |
| 962 | case LEX_IS_ONECHAR_QUOTE: |
| 963 | if (state == 10) |
| 964 | { |
| 965 | /* Preserve the whitespace in foo 'b' */ |
| 966 | UNGET (ch); |
| 967 | state = 3; |
| 968 | PUT (' '); |
| 969 | break; |
| 970 | } |
| 971 | ch = GET (); |
| 972 | if (ch == EOF) |
| 973 | { |
| 974 | as_warn (_("end of file after a one-character quote; \\0 inserted")); |
| 975 | ch = 0; |
| 976 | } |
| 977 | if (ch == '\\') |
| 978 | { |
| 979 | ch = GET (); |
| 980 | if (ch == EOF) |
| 981 | { |
| 982 | as_warn (_("end of file in escape character")); |
| 983 | ch = '\\'; |
| 984 | } |
| 985 | else |
| 986 | ch = process_escape (ch); |
| 987 | } |
| 988 | sprintf (out_buf, "%d", (int) (unsigned char) ch); |
| 989 | |
| 990 | /* None of these 'x constants for us. We want 'x'. */ |
| 991 | if ((ch = GET ()) != '\'') |
| 992 | { |
| 993 | #ifdef REQUIRE_CHAR_CLOSE_QUOTE |
| 994 | as_warn (_("Missing close quote: (assumed)")); |
| 995 | #else |
| 996 | if (ch != EOF) |
| 997 | UNGET (ch); |
| 998 | #endif |
| 999 | } |
| 1000 | if (strlen (out_buf) == 1) |
| 1001 | { |
| 1002 | PUT (out_buf[0]); |
| 1003 | break; |
| 1004 | } |
| 1005 | if (state == 9) |
| 1006 | old_state = 3; |
| 1007 | else |
| 1008 | old_state = state; |
| 1009 | state = -1; |
| 1010 | out_string = out_buf; |
| 1011 | PUT (*out_string++); |
| 1012 | break; |
| 1013 | #endif |
| 1014 | |
| 1015 | case LEX_IS_COLON: |
| 1016 | #ifdef KEEP_WHITE_AROUND_COLON |
| 1017 | state = 9; |
| 1018 | #else |
| 1019 | if (state == 9 || state == 10) |
| 1020 | state = 3; |
| 1021 | else if (state != 3) |
| 1022 | state = 1; |
| 1023 | #endif |
| 1024 | PUT (ch); |
| 1025 | break; |
| 1026 | |
| 1027 | case LEX_IS_NEWLINE: |
| 1028 | /* Roll out a bunch of newlines from inside comments, etc. */ |
| 1029 | if (add_newlines) |
| 1030 | { |
| 1031 | --add_newlines; |
| 1032 | UNGET (ch); |
| 1033 | } |
| 1034 | /* Fall through. */ |
| 1035 | |
| 1036 | case LEX_IS_LINE_SEPARATOR: |
| 1037 | state = 0; |
| 1038 | PUT (ch); |
| 1039 | break; |
| 1040 | |
| 1041 | #ifdef TC_V850 |
| 1042 | case LEX_IS_DOUBLEDASH_1ST: |
| 1043 | ch2 = GET(); |
| 1044 | if (ch2 != '-') |
| 1045 | { |
| 1046 | UNGET (ch2); |
| 1047 | goto de_fault; |
| 1048 | } |
| 1049 | /* Read and skip to end of line. */ |
| 1050 | do |
| 1051 | { |
| 1052 | ch = GET (); |
| 1053 | } |
| 1054 | while (ch != EOF && ch != '\n'); |
| 1055 | if (ch == EOF) |
| 1056 | { |
| 1057 | as_warn (_("end of file in comment; newline inserted")); |
| 1058 | } |
| 1059 | state = 0; |
| 1060 | PUT ('\n'); |
| 1061 | break; |
| 1062 | #endif |
| 1063 | #ifdef DOUBLEBAR_PARALLEL |
| 1064 | case LEX_IS_DOUBLEBAR_1ST: |
| 1065 | ch2 = GET(); |
| 1066 | if (ch2 != '|') |
| 1067 | { |
| 1068 | UNGET (ch2); |
| 1069 | goto de_fault; |
| 1070 | } |
| 1071 | /* Reset back to state 1 and pretend that we are parsing a line from |
| 1072 | just after the first white space. */ |
| 1073 | state = 1; |
| 1074 | PUT ('|'); |
| 1075 | PUT ('|'); |
| 1076 | break; |
| 1077 | #endif |
| 1078 | case LEX_IS_LINE_COMMENT_START: |
| 1079 | /* FIXME-someday: The two character comment stuff was badly |
| 1080 | thought out. On i386, we want '/' as line comment start |
| 1081 | AND we want C style comments. hence this hack. The |
| 1082 | whole lexical process should be reworked. xoxorich. */ |
| 1083 | if (ch == '/') |
| 1084 | { |
| 1085 | ch2 = GET (); |
| 1086 | if (ch2 == '*') |
| 1087 | { |
| 1088 | old_state = 3; |
| 1089 | state = -2; |
| 1090 | break; |
| 1091 | } |
| 1092 | else |
| 1093 | { |
| 1094 | UNGET (ch2); |
| 1095 | } |
| 1096 | } /* bad hack */ |
| 1097 | |
| 1098 | if (state == 0 || state == 1) /* Only comment at start of line. */ |
| 1099 | { |
| 1100 | int startch; |
| 1101 | |
| 1102 | startch = ch; |
| 1103 | |
| 1104 | do |
| 1105 | { |
| 1106 | ch = GET (); |
| 1107 | } |
| 1108 | while (ch != EOF && IS_WHITESPACE (ch)); |
| 1109 | if (ch == EOF) |
| 1110 | { |
| 1111 | as_warn (_("end of file in comment; newline inserted")); |
| 1112 | PUT ('\n'); |
| 1113 | break; |
| 1114 | } |
| 1115 | if (ch < '0' || ch > '9' || state != 0 || startch != '#') |
| 1116 | { |
| 1117 | /* Not a cpp line. */ |
| 1118 | while (ch != EOF && !IS_NEWLINE (ch)) |
| 1119 | ch = GET (); |
| 1120 | if (ch == EOF) |
| 1121 | as_warn (_("EOF in Comment: Newline inserted")); |
| 1122 | state = 0; |
| 1123 | PUT ('\n'); |
| 1124 | break; |
| 1125 | } |
| 1126 | /* Looks like `# 123 "filename"' from cpp. */ |
| 1127 | UNGET (ch); |
| 1128 | old_state = 4; |
| 1129 | state = -1; |
| 1130 | if (scrub_m68k_mri) |
| 1131 | out_string = "\tappline "; |
| 1132 | else |
| 1133 | out_string = "\t.appline "; |
| 1134 | PUT (*out_string++); |
| 1135 | break; |
| 1136 | } |
| 1137 | |
| 1138 | #ifdef TC_D10V |
| 1139 | /* All insns end in a char for which LEX_IS_SYMBOL_COMPONENT is true. |
| 1140 | Trap is the only short insn that has a first operand that is |
| 1141 | neither register nor label. |
| 1142 | We must prevent exef0f ||trap #1 to degenerate to exef0f ||trap#1 . |
| 1143 | We can't make '#' LEX_IS_SYMBOL_COMPONENT because it is already |
| 1144 | LEX_IS_LINE_COMMENT_START. However, it is the only character in |
| 1145 | line_comment_chars for d10v, hence we can recognize it as such. */ |
| 1146 | /* An alternative approach would be to reset the state to 1 when |
| 1147 | we see '||', '<'- or '->', but that seems to be overkill. */ |
| 1148 | if (state == 10) PUT (' '); |
| 1149 | #endif |
| 1150 | /* We have a line comment character which is not at the |
| 1151 | start of a line. If this is also a normal comment |
| 1152 | character, fall through. Otherwise treat it as a default |
| 1153 | character. */ |
| 1154 | if (strchr (tc_comment_chars, ch) == NULL |
| 1155 | && (! scrub_m68k_mri |
| 1156 | || (ch != '!' && ch != '*'))) |
| 1157 | goto de_fault; |
| 1158 | if (scrub_m68k_mri |
| 1159 | && (ch == '!' || ch == '*' || ch == '#') |
| 1160 | && state != 1 |
| 1161 | && state != 10) |
| 1162 | goto de_fault; |
| 1163 | /* Fall through. */ |
| 1164 | case LEX_IS_COMMENT_START: |
| 1165 | #if defined TC_ARM && defined OBJ_ELF |
| 1166 | /* On the ARM, `@' is the comment character. |
| 1167 | Unfortunately this is also a special character in ELF .symver |
| 1168 | directives (and .type, though we deal with those another way). So |
| 1169 | we check if this line is such a directive, and treat the character |
| 1170 | as default if so. This is a hack. */ |
| 1171 | if ((symver_state != NULL) && (*symver_state == 0)) |
| 1172 | goto de_fault; |
| 1173 | #endif |
| 1174 | #ifdef WARN_COMMENTS |
| 1175 | if (!found_comment) |
| 1176 | as_where (&found_comment_file, &found_comment); |
| 1177 | #endif |
| 1178 | do |
| 1179 | { |
| 1180 | ch = GET (); |
| 1181 | } |
| 1182 | while (ch != EOF && !IS_NEWLINE (ch)); |
| 1183 | if (ch == EOF) |
| 1184 | as_warn (_("end of file in comment; newline inserted")); |
| 1185 | state = 0; |
| 1186 | PUT ('\n'); |
| 1187 | break; |
| 1188 | |
| 1189 | case LEX_IS_SYMBOL_COMPONENT: |
| 1190 | if (state == 10) |
| 1191 | { |
| 1192 | /* This is a symbol character following another symbol |
| 1193 | character, with whitespace in between. We skipped |
| 1194 | the whitespace earlier, so output it now. */ |
| 1195 | UNGET (ch); |
| 1196 | state = 3; |
| 1197 | PUT (' '); |
| 1198 | break; |
| 1199 | } |
| 1200 | |
| 1201 | if (state == 3) |
| 1202 | state = 9; |
| 1203 | |
| 1204 | /* This is a common case. Quickly copy CH and all the |
| 1205 | following symbol component or normal characters. */ |
| 1206 | if (to + 1 < toend |
| 1207 | && mri_state == NULL |
| 1208 | #if defined TC_ARM && defined OBJ_ELF |
| 1209 | && symver_state == NULL |
| 1210 | #endif |
| 1211 | ) |
| 1212 | { |
| 1213 | char *s; |
| 1214 | int len; |
| 1215 | |
| 1216 | for (s = from; s < fromend; s++) |
| 1217 | { |
| 1218 | int type; |
| 1219 | |
| 1220 | ch2 = * (unsigned char *) s; |
| 1221 | type = lex[ch2]; |
| 1222 | if (type != 0 |
| 1223 | && type != LEX_IS_SYMBOL_COMPONENT) |
| 1224 | break; |
| 1225 | } |
| 1226 | if (s > from) |
| 1227 | { |
| 1228 | /* Handle the last character normally, for |
| 1229 | simplicity. */ |
| 1230 | --s; |
| 1231 | } |
| 1232 | len = s - from; |
| 1233 | if (len > (toend - to) - 1) |
| 1234 | len = (toend - to) - 1; |
| 1235 | if (len > 0) |
| 1236 | { |
| 1237 | PUT (ch); |
| 1238 | if (len > 8) |
| 1239 | { |
| 1240 | memcpy (to, from, len); |
| 1241 | to += len; |
| 1242 | from += len; |
| 1243 | } |
| 1244 | else |
| 1245 | { |
| 1246 | switch (len) |
| 1247 | { |
| 1248 | case 8: *to++ = *from++; |
| 1249 | case 7: *to++ = *from++; |
| 1250 | case 6: *to++ = *from++; |
| 1251 | case 5: *to++ = *from++; |
| 1252 | case 4: *to++ = *from++; |
| 1253 | case 3: *to++ = *from++; |
| 1254 | case 2: *to++ = *from++; |
| 1255 | case 1: *to++ = *from++; |
| 1256 | } |
| 1257 | } |
| 1258 | ch = GET (); |
| 1259 | } |
| 1260 | } |
| 1261 | |
| 1262 | /* Fall through. */ |
| 1263 | default: |
| 1264 | de_fault: |
| 1265 | /* Some relatively `normal' character. */ |
| 1266 | if (state == 0) |
| 1267 | { |
| 1268 | state = 11; /* Now seeing label definition */ |
| 1269 | } |
| 1270 | else if (state == 1) |
| 1271 | { |
| 1272 | state = 2; /* Ditto */ |
| 1273 | } |
| 1274 | else if (state == 9) |
| 1275 | { |
| 1276 | if (lex[ch] != LEX_IS_SYMBOL_COMPONENT) |
| 1277 | state = 3; |
| 1278 | } |
| 1279 | else if (state == 10) |
| 1280 | { |
| 1281 | if (ch == '\\') |
| 1282 | { |
| 1283 | /* Special handling for backslash: a backslash may |
| 1284 | be the beginning of a formal parameter (of a |
| 1285 | macro) following another symbol character, with |
| 1286 | whitespace in between. If that is the case, we |
| 1287 | output a space before the parameter. Strictly |
| 1288 | speaking, correct handling depends upon what the |
| 1289 | macro parameter expands into; if the parameter |
| 1290 | expands into something which does not start with |
| 1291 | an operand character, then we don't want to keep |
| 1292 | the space. We don't have enough information to |
| 1293 | make the right choice, so here we are making the |
| 1294 | choice which is more likely to be correct. */ |
| 1295 | PUT (' '); |
| 1296 | } |
| 1297 | |
| 1298 | state = 3; |
| 1299 | } |
| 1300 | PUT (ch); |
| 1301 | break; |
| 1302 | } |
| 1303 | } |
| 1304 | |
| 1305 | /*NOTREACHED*/ |
| 1306 | |
| 1307 | fromeof: |
| 1308 | /* We have reached the end of the input. */ |
| 1309 | return to - tostart; |
| 1310 | |
| 1311 | tofull: |
| 1312 | /* The output buffer is full. Save any input we have not yet |
| 1313 | processed. */ |
| 1314 | if (fromend > from) |
| 1315 | { |
| 1316 | saved_input = from; |
| 1317 | saved_input_len = fromend - from; |
| 1318 | } |
| 1319 | else |
| 1320 | saved_input = NULL; |
| 1321 | |
| 1322 | return to - tostart; |
| 1323 | } |
| 1324 | |
| 1325 | /* end of app.c */ |