Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | %{ |
| 2 | /* |
| 3 | * Lexical Analyzer for the Aic7xxx SCSI Host adapter sequencer assembler. |
| 4 | * |
| 5 | * Copyright (c) 1997, 1998, 2000 Justin T. Gibbs. |
| 6 | * Copyright (c) 2001, 2002 Adaptec Inc. |
| 7 | * All rights reserved. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions, and the following disclaimer, |
| 14 | * without modification. |
| 15 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 16 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 17 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 18 | * including a substantially similar Disclaimer requirement for further |
| 19 | * binary redistribution. |
| 20 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 21 | * of any contributors may be used to endorse or promote products derived |
| 22 | * from this software without specific prior written permission. |
| 23 | * |
| 24 | * Alternatively, this software may be distributed under the terms of the |
| 25 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 26 | * Software Foundation. |
| 27 | * |
| 28 | * NO WARRANTY |
| 29 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 30 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 31 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 32 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 33 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 34 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 35 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 36 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 37 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 38 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 39 | * POSSIBILITY OF SUCH DAMAGES. |
| 40 | * |
Hannes Reinecke | 2628ed2 | 2006-01-24 10:41:45 +0100 | [diff] [blame] | 41 | * $Id: //depot/aic7xxx/aic7xxx/aicasm/aicasm_scan.l#20 $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | * |
| 43 | * $FreeBSD$ |
| 44 | */ |
| 45 | |
| 46 | #include <sys/types.h> |
| 47 | |
| 48 | #include <inttypes.h> |
| 49 | #include <limits.h> |
| 50 | #include <regex.h> |
| 51 | #include <stdio.h> |
| 52 | #include <string.h> |
| 53 | #include <sysexits.h> |
| 54 | #ifdef __linux__ |
| 55 | #include "../queue.h" |
| 56 | #else |
| 57 | #include <sys/queue.h> |
| 58 | #endif |
| 59 | |
| 60 | #include "aicasm.h" |
| 61 | #include "aicasm_symbol.h" |
| 62 | #include "aicasm_gram.h" |
| 63 | |
| 64 | /* This is used for macro body capture too, so err on the large size. */ |
| 65 | #define MAX_STR_CONST 4096 |
| 66 | static char string_buf[MAX_STR_CONST]; |
| 67 | static char *string_buf_ptr; |
| 68 | static int parren_count; |
| 69 | static int quote_count; |
| 70 | static char buf[255]; |
| 71 | %} |
| 72 | |
| 73 | PATH ([/]*[-A-Za-z0-9_.])+ |
| 74 | WORD [A-Za-z_][-A-Za-z_0-9]* |
| 75 | SPACE [ \t]+ |
| 76 | MCARG [^(), \t]+ |
| 77 | MBODY ((\\[^\n])*[^\n\\]*)+ |
| 78 | |
| 79 | %x COMMENT |
| 80 | %x CEXPR |
| 81 | %x INCLUDE |
| 82 | %x STRING |
| 83 | %x MACRODEF |
| 84 | %x MACROARGLIST |
| 85 | %x MACROCALLARGS |
| 86 | %x MACROBODY |
| 87 | |
| 88 | %% |
| 89 | \n { ++yylineno; } |
| 90 | \r ; |
| 91 | "/*" { BEGIN COMMENT; /* Enter comment eating state */ } |
| 92 | <COMMENT>"/*" { fprintf(stderr, "Warning! Comment within comment."); } |
| 93 | <COMMENT>\n { ++yylineno; } |
| 94 | <COMMENT>[^*/\n]* ; |
| 95 | <COMMENT>"*"+[^*/\n]* ; |
| 96 | <COMMENT>"/"+[^*/\n]* ; |
| 97 | <COMMENT>"*"+"/" { BEGIN INITIAL; } |
| 98 | if[ \t]*\( { |
| 99 | string_buf_ptr = string_buf; |
| 100 | parren_count = 1; |
| 101 | BEGIN CEXPR; |
| 102 | return T_IF; |
| 103 | } |
| 104 | <CEXPR>\( { *string_buf_ptr++ = '('; parren_count++; } |
| 105 | <CEXPR>\) { |
| 106 | parren_count--; |
| 107 | if (parren_count == 0) { |
| 108 | /* All done */ |
| 109 | BEGIN INITIAL; |
| 110 | *string_buf_ptr = '\0'; |
| 111 | yylval.sym = symtable_get(string_buf); |
| 112 | return T_CEXPR; |
| 113 | } else { |
| 114 | *string_buf_ptr++ = ')'; |
| 115 | } |
| 116 | } |
| 117 | <CEXPR>\n { ++yylineno; } |
| 118 | <CEXPR>\r ; |
| 119 | <CEXPR>[^()\n]+ { |
| 120 | char *yptr; |
| 121 | |
| 122 | yptr = yytext; |
| 123 | while (*yptr != '\0') { |
| 124 | /* Remove duplicate spaces */ |
| 125 | if (*yptr == '\t') |
| 126 | *yptr = ' '; |
| 127 | if (*yptr == ' ' |
| 128 | && string_buf_ptr != string_buf |
| 129 | && string_buf_ptr[-1] == ' ') |
| 130 | yptr++; |
| 131 | else |
| 132 | *string_buf_ptr++ = *yptr++; |
| 133 | } |
| 134 | } |
Hannes Reinecke | 2628ed2 | 2006-01-24 10:41:45 +0100 | [diff] [blame] | 135 | else { return T_ELSE; } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | VERSION { return T_VERSION; } |
| 137 | PREFIX { return T_PREFIX; } |
| 138 | PATCH_ARG_LIST { return T_PATCH_ARG_LIST; } |
| 139 | \" { |
| 140 | string_buf_ptr = string_buf; |
| 141 | BEGIN STRING; |
| 142 | } |
| 143 | <STRING>[^"]+ { |
| 144 | char *yptr; |
| 145 | |
| 146 | yptr = yytext; |
| 147 | while (*yptr) |
| 148 | *string_buf_ptr++ = *yptr++; |
| 149 | } |
| 150 | <STRING>\" { |
| 151 | /* All done */ |
| 152 | BEGIN INITIAL; |
| 153 | *string_buf_ptr = '\0'; |
| 154 | yylval.str = string_buf; |
| 155 | return T_STRING; |
| 156 | } |
| 157 | {SPACE} ; |
| 158 | |
| 159 | /* Register/SCB/SRAM definition keywords */ |
| 160 | export { return T_EXPORT; } |
| 161 | register { return T_REGISTER; } |
| 162 | const { yylval.value = FALSE; return T_CONST; } |
| 163 | download { return T_DOWNLOAD; } |
| 164 | address { return T_ADDRESS; } |
Hannes Reinecke | 3dbd10f | 2008-04-25 15:01:41 +0200 | [diff] [blame] | 165 | count { return T_COUNT; } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | access_mode { return T_ACCESS_MODE; } |
Denys Vlasenko | fa25b99 | 2008-09-22 14:56:40 -0700 | [diff] [blame] | 167 | dont_generate_debug_code { return T_DONT_GENERATE_DEBUG_CODE; } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | modes { return T_MODES; } |
| 169 | RW|RO|WO { |
| 170 | if (strcmp(yytext, "RW") == 0) |
| 171 | yylval.value = RW; |
| 172 | else if (strcmp(yytext, "RO") == 0) |
| 173 | yylval.value = RO; |
| 174 | else |
| 175 | yylval.value = WO; |
| 176 | return T_MODE; |
| 177 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | field { return T_FIELD; } |
| 179 | enum { return T_ENUM; } |
| 180 | mask { return T_MASK; } |
| 181 | alias { return T_ALIAS; } |
| 182 | size { return T_SIZE; } |
| 183 | scb { return T_SCB; } |
| 184 | scratch_ram { return T_SRAM; } |
| 185 | accumulator { return T_ACCUM; } |
| 186 | mode_pointer { return T_MODE_PTR; } |
| 187 | allones { return T_ALLONES; } |
| 188 | allzeros { return T_ALLZEROS; } |
| 189 | none { return T_NONE; } |
| 190 | sindex { return T_SINDEX; } |
| 191 | A { return T_A; } |
| 192 | |
Hannes Reinecke | 2628ed2 | 2006-01-24 10:41:45 +0100 | [diff] [blame] | 193 | /* Instruction Formatting */ |
| 194 | PAD_PAGE { return T_PAD_PAGE; } |
| 195 | BEGIN_CRITICAL { return T_BEGIN_CS; } |
| 196 | END_CRITICAL { return T_END_CS; } |
| 197 | SET_SRC_MODE { return T_SET_SRC_MODE; } |
| 198 | SET_DST_MODE { return T_SET_DST_MODE; } |
| 199 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | /* Opcodes */ |
| 201 | shl { return T_SHL; } |
| 202 | shr { return T_SHR; } |
| 203 | ror { return T_ROR; } |
| 204 | rol { return T_ROL; } |
| 205 | mvi { return T_MVI; } |
| 206 | mov { return T_MOV; } |
| 207 | clr { return T_CLR; } |
| 208 | jmp { return T_JMP; } |
| 209 | jc { return T_JC; } |
| 210 | jnc { return T_JNC; } |
| 211 | je { return T_JE; } |
| 212 | jne { return T_JNE; } |
| 213 | jz { return T_JZ; } |
| 214 | jnz { return T_JNZ; } |
| 215 | call { return T_CALL; } |
| 216 | add { return T_ADD; } |
| 217 | adc { return T_ADC; } |
| 218 | bmov { return T_BMOV; } |
| 219 | inc { return T_INC; } |
| 220 | dec { return T_DEC; } |
| 221 | stc { return T_STC; } |
| 222 | clc { return T_CLC; } |
| 223 | cmp { return T_CMP; } |
| 224 | not { return T_NOT; } |
| 225 | xor { return T_XOR; } |
| 226 | test { return T_TEST;} |
| 227 | and { return T_AND; } |
| 228 | or { return T_OR; } |
| 229 | ret { return T_RET; } |
| 230 | nop { return T_NOP; } |
Hannes Reinecke | 2628ed2 | 2006-01-24 10:41:45 +0100 | [diff] [blame] | 231 | |
| 232 | /* ARP2 16bit extensions */ |
Hannes Reinecke | 2b48aed | 2008-04-23 11:39:49 +0200 | [diff] [blame] | 233 | /* or16 { return T_OR16; } */ |
| 234 | /* and16 { return T_AND16; }*/ |
| 235 | /* xor16 { return T_XOR16; }*/ |
| 236 | /* add16 { return T_ADD16; }*/ |
| 237 | /* adc16 { return T_ADC16; }*/ |
| 238 | /* mvi16 { return T_MVI16; }*/ |
| 239 | /* test16 { return T_TEST16; }*/ |
| 240 | /* cmp16 { return T_CMP16; }*/ |
| 241 | /* cmpxchg { return T_CMPXCHG; }*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
| 243 | /* Allowed Symbols */ |
| 244 | \<\< { return T_EXPR_LSHIFT; } |
| 245 | \>\> { return T_EXPR_RSHIFT; } |
| 246 | [-+,:()~|&."{};<>[\]/*!=] { return yytext[0]; } |
| 247 | |
| 248 | /* Number processing */ |
| 249 | 0[0-7]* { |
| 250 | yylval.value = strtol(yytext, NULL, 8); |
| 251 | return T_NUMBER; |
| 252 | } |
| 253 | |
| 254 | 0[xX][0-9a-fA-F]+ { |
| 255 | yylval.value = strtoul(yytext + 2, NULL, 16); |
| 256 | return T_NUMBER; |
| 257 | } |
| 258 | |
| 259 | [1-9][0-9]* { |
| 260 | yylval.value = strtol(yytext, NULL, 10); |
| 261 | return T_NUMBER; |
| 262 | } |
| 263 | /* Include Files */ |
| 264 | #include{SPACE} { |
| 265 | BEGIN INCLUDE; |
| 266 | quote_count = 0; |
| 267 | return T_INCLUDE; |
| 268 | } |
| 269 | <INCLUDE>[<] { return yytext[0]; } |
| 270 | <INCLUDE>[>] { BEGIN INITIAL; return yytext[0]; } |
| 271 | <INCLUDE>[\"] { |
| 272 | if (quote_count != 0) |
| 273 | BEGIN INITIAL; |
| 274 | quote_count++; |
| 275 | return yytext[0]; |
| 276 | } |
| 277 | <INCLUDE>{PATH} { |
| 278 | char *yptr; |
| 279 | |
| 280 | yptr = yytext; |
| 281 | string_buf_ptr = string_buf; |
| 282 | while (*yptr) |
| 283 | *string_buf_ptr++ = *yptr++; |
| 284 | yylval.str = string_buf; |
| 285 | *string_buf_ptr = '\0'; |
| 286 | return T_PATH; |
| 287 | } |
| 288 | <INCLUDE>. { stop("Invalid include line", EX_DATAERR); } |
| 289 | #define{SPACE} { |
| 290 | BEGIN MACRODEF; |
| 291 | return T_DEFINE; |
| 292 | } |
| 293 | <MACRODEF>{WORD}{SPACE} { |
| 294 | char *yptr; |
| 295 | |
| 296 | /* Strip space and return as a normal symbol */ |
| 297 | yptr = yytext; |
| 298 | while (*yptr != ' ' && *yptr != '\t') |
| 299 | yptr++; |
| 300 | *yptr = '\0'; |
| 301 | yylval.sym = symtable_get(yytext); |
| 302 | string_buf_ptr = string_buf; |
| 303 | BEGIN MACROBODY; |
| 304 | return T_SYMBOL; |
| 305 | } |
| 306 | <MACRODEF>{WORD}\( { |
| 307 | /* |
| 308 | * We store the symbol with its opening |
| 309 | * parren so we can differentiate macros |
| 310 | * that take args from macros with the |
| 311 | * same name that do not take args as |
| 312 | * is allowed in C. |
| 313 | */ |
| 314 | BEGIN MACROARGLIST; |
| 315 | yylval.sym = symtable_get(yytext); |
| 316 | unput('('); |
| 317 | return T_SYMBOL; |
| 318 | } |
| 319 | <MACROARGLIST>{WORD} { |
| 320 | yylval.str = yytext; |
| 321 | return T_ARG; |
| 322 | } |
| 323 | <MACROARGLIST>{SPACE} ; |
| 324 | <MACROARGLIST>[(,] { |
| 325 | return yytext[0]; |
| 326 | } |
| 327 | <MACROARGLIST>[)] { |
| 328 | string_buf_ptr = string_buf; |
| 329 | BEGIN MACROBODY; |
| 330 | return ')'; |
| 331 | } |
| 332 | <MACROARGLIST>. { |
| 333 | snprintf(buf, sizeof(buf), "Invalid character " |
| 334 | "'%c' in macro argument list", |
| 335 | yytext[0]); |
| 336 | stop(buf, EX_DATAERR); |
| 337 | } |
| 338 | <MACROCALLARGS>{SPACE} ; |
| 339 | <MACROCALLARGS>\( { |
| 340 | parren_count++; |
| 341 | if (parren_count == 1) |
| 342 | return ('('); |
| 343 | *string_buf_ptr++ = '('; |
| 344 | } |
| 345 | <MACROCALLARGS>\) { |
| 346 | parren_count--; |
| 347 | if (parren_count == 0) { |
| 348 | BEGIN INITIAL; |
| 349 | return (')'); |
| 350 | } |
| 351 | *string_buf_ptr++ = ')'; |
| 352 | } |
| 353 | <MACROCALLARGS>{MCARG} { |
| 354 | char *yptr; |
| 355 | |
| 356 | yptr = yytext; |
| 357 | while (*yptr) |
| 358 | *string_buf_ptr++ = *yptr++; |
| 359 | } |
| 360 | <MACROCALLARGS>\, { |
| 361 | if (string_buf_ptr != string_buf) { |
| 362 | /* |
| 363 | * Return an argument and |
| 364 | * rescan this comma so we |
| 365 | * can return it as well. |
| 366 | */ |
| 367 | *string_buf_ptr = '\0'; |
| 368 | yylval.str = string_buf; |
| 369 | string_buf_ptr = string_buf; |
| 370 | unput(','); |
| 371 | return T_ARG; |
| 372 | } |
| 373 | return ','; |
| 374 | } |
| 375 | <MACROBODY>\\\n { |
| 376 | /* Eat escaped newlines. */ |
| 377 | ++yylineno; |
| 378 | } |
| 379 | <MACROBODY>\r ; |
| 380 | <MACROBODY>\n { |
| 381 | /* Macros end on the first unescaped newline. */ |
| 382 | BEGIN INITIAL; |
| 383 | *string_buf_ptr = '\0'; |
| 384 | yylval.str = string_buf; |
| 385 | ++yylineno; |
| 386 | return T_MACROBODY; |
| 387 | } |
| 388 | <MACROBODY>{MBODY} { |
| 389 | char *yptr; |
| 390 | char c; |
| 391 | |
| 392 | yptr = yytext; |
| 393 | while (c = *yptr++) { |
| 394 | /* |
| 395 | * Strip carriage returns. |
| 396 | */ |
| 397 | if (c == '\r') |
| 398 | continue; |
| 399 | *string_buf_ptr++ = c; |
| 400 | } |
| 401 | } |
| 402 | {WORD}\( { |
| 403 | char *yptr; |
| 404 | char *ycopy; |
| 405 | |
| 406 | /* May be a symbol or a macro invocation. */ |
| 407 | yylval.sym = symtable_get(yytext); |
| 408 | if (yylval.sym->type == MACRO) { |
| 409 | YY_BUFFER_STATE old_state; |
| 410 | YY_BUFFER_STATE temp_state; |
| 411 | |
| 412 | ycopy = strdup(yytext); |
| 413 | yptr = ycopy + yyleng; |
| 414 | while (yptr > ycopy) |
| 415 | unput(*--yptr); |
| 416 | old_state = YY_CURRENT_BUFFER; |
| 417 | temp_state = |
| 418 | yy_create_buffer(stdin, |
| 419 | YY_BUF_SIZE); |
| 420 | yy_switch_to_buffer(temp_state); |
| 421 | mm_switch_to_buffer(old_state); |
| 422 | mmparse(); |
| 423 | mm_switch_to_buffer(temp_state); |
| 424 | yy_switch_to_buffer(old_state); |
| 425 | mm_delete_buffer(temp_state); |
| 426 | expand_macro(yylval.sym); |
| 427 | } else { |
| 428 | if (yylval.sym->type == UNINITIALIZED) { |
| 429 | /* Try without the '(' */ |
| 430 | symbol_delete(yylval.sym); |
| 431 | yytext[yyleng-1] = '\0'; |
| 432 | yylval.sym = |
| 433 | symtable_get(yytext); |
| 434 | } |
| 435 | unput('('); |
| 436 | return T_SYMBOL; |
| 437 | } |
| 438 | } |
| 439 | {WORD} { |
| 440 | yylval.sym = symtable_get(yytext); |
| 441 | if (yylval.sym->type == MACRO) { |
| 442 | expand_macro(yylval.sym); |
| 443 | } else { |
| 444 | return T_SYMBOL; |
| 445 | } |
| 446 | } |
| 447 | . { |
| 448 | snprintf(buf, sizeof(buf), "Invalid character " |
| 449 | "'%c'", yytext[0]); |
| 450 | stop(buf, EX_DATAERR); |
| 451 | } |
| 452 | %% |
| 453 | |
| 454 | typedef struct include { |
| 455 | YY_BUFFER_STATE buffer; |
| 456 | int lineno; |
| 457 | char *filename; |
| 458 | SLIST_ENTRY(include) links; |
| 459 | }include_t; |
| 460 | |
| 461 | SLIST_HEAD(, include) include_stack; |
| 462 | |
| 463 | void |
| 464 | include_file(char *file_name, include_type type) |
| 465 | { |
| 466 | FILE *newfile; |
| 467 | include_t *include; |
| 468 | |
| 469 | newfile = NULL; |
| 470 | /* Try the current directory first */ |
| 471 | if (includes_search_curdir != 0 || type == SOURCE_FILE) |
| 472 | newfile = fopen(file_name, "r"); |
| 473 | |
| 474 | if (newfile == NULL && type != SOURCE_FILE) { |
| 475 | path_entry_t include_dir; |
| 476 | for (include_dir = search_path.slh_first; |
| 477 | include_dir != NULL; |
| 478 | include_dir = include_dir->links.sle_next) { |
| 479 | char fullname[PATH_MAX]; |
| 480 | |
| 481 | if ((include_dir->quoted_includes_only == TRUE) |
| 482 | && (type != QUOTED_INCLUDE)) |
| 483 | continue; |
| 484 | |
| 485 | snprintf(fullname, sizeof(fullname), |
| 486 | "%s/%s", include_dir->directory, file_name); |
| 487 | |
| 488 | if ((newfile = fopen(fullname, "r")) != NULL) |
| 489 | break; |
| 490 | } |
| 491 | } |
| 492 | |
| 493 | if (newfile == NULL) { |
| 494 | perror(file_name); |
| 495 | stop("Unable to open input file", EX_SOFTWARE); |
| 496 | /* NOTREACHED */ |
| 497 | } |
| 498 | |
| 499 | if (type != SOURCE_FILE) { |
| 500 | include = (include_t *)malloc(sizeof(include_t)); |
| 501 | if (include == NULL) { |
| 502 | stop("Unable to allocate include stack entry", |
| 503 | EX_SOFTWARE); |
| 504 | /* NOTREACHED */ |
| 505 | } |
| 506 | include->buffer = YY_CURRENT_BUFFER; |
| 507 | include->lineno = yylineno; |
| 508 | include->filename = yyfilename; |
| 509 | SLIST_INSERT_HEAD(&include_stack, include, links); |
| 510 | } |
| 511 | yy_switch_to_buffer(yy_create_buffer(newfile, YY_BUF_SIZE)); |
| 512 | yylineno = 1; |
| 513 | yyfilename = strdup(file_name); |
| 514 | } |
| 515 | |
| 516 | static void next_substitution(struct symbol *mac_symbol, const char *body_pos, |
| 517 | const char **next_match, |
| 518 | struct macro_arg **match_marg, regmatch_t *match); |
| 519 | |
| 520 | void |
| 521 | expand_macro(struct symbol *macro_symbol) |
| 522 | { |
| 523 | struct macro_arg *marg; |
| 524 | struct macro_arg *match_marg; |
| 525 | const char *body_head; |
| 526 | const char *body_pos; |
| 527 | const char *next_match; |
| 528 | |
| 529 | /* |
| 530 | * Due to the nature of unput, we must work |
| 531 | * backwards through the macro body performing |
| 532 | * any expansions. |
| 533 | */ |
| 534 | body_head = macro_symbol->info.macroinfo->body; |
| 535 | body_pos = body_head + strlen(body_head); |
| 536 | while (body_pos > body_head) { |
| 537 | regmatch_t match; |
| 538 | |
| 539 | next_match = body_head; |
| 540 | match_marg = NULL; |
| 541 | next_substitution(macro_symbol, body_pos, &next_match, |
| 542 | &match_marg, &match); |
| 543 | |
| 544 | /* Put back everything up until the replacement. */ |
| 545 | while (body_pos > next_match) |
| 546 | unput(*--body_pos); |
| 547 | |
| 548 | /* Perform the replacement. */ |
| 549 | if (match_marg != NULL) { |
| 550 | const char *strp; |
| 551 | |
| 552 | next_match = match_marg->replacement_text; |
| 553 | strp = next_match + strlen(next_match); |
| 554 | while (strp > next_match) |
| 555 | unput(*--strp); |
| 556 | |
| 557 | /* Skip past the unexpanded macro arg. */ |
| 558 | body_pos -= match.rm_eo - match.rm_so; |
| 559 | } |
| 560 | } |
| 561 | |
| 562 | /* Cleanup replacement text. */ |
| 563 | STAILQ_FOREACH(marg, ¯o_symbol->info.macroinfo->args, links) { |
| 564 | free(marg->replacement_text); |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | /* |
| 569 | * Find the next substitution in the macro working backwards from |
| 570 | * body_pos until the beginning of the macro buffer. next_match |
| 571 | * should be initialized to the beginning of the macro buffer prior |
| 572 | * to calling this routine. |
| 573 | */ |
| 574 | static void |
| 575 | next_substitution(struct symbol *mac_symbol, const char *body_pos, |
| 576 | const char **next_match, struct macro_arg **match_marg, |
| 577 | regmatch_t *match) |
| 578 | { |
| 579 | regmatch_t matches[2]; |
| 580 | struct macro_arg *marg; |
| 581 | const char *search_pos; |
| 582 | int retval; |
| 583 | |
| 584 | do { |
| 585 | search_pos = *next_match; |
| 586 | |
| 587 | STAILQ_FOREACH(marg, &mac_symbol->info.macroinfo->args, links) { |
| 588 | |
| 589 | retval = regexec(&marg->arg_regex, search_pos, 2, |
| 590 | matches, 0); |
| 591 | if (retval == 0 |
| 592 | && (matches[1].rm_eo + search_pos) <= body_pos |
| 593 | && (matches[1].rm_eo + search_pos) > *next_match) { |
| 594 | *match = matches[1]; |
| 595 | *next_match = match->rm_eo + search_pos; |
| 596 | *match_marg = marg; |
| 597 | } |
| 598 | } |
| 599 | } while (search_pos != *next_match); |
| 600 | } |
| 601 | |
| 602 | int |
| 603 | yywrap() |
| 604 | { |
| 605 | include_t *include; |
| 606 | |
| 607 | yy_delete_buffer(YY_CURRENT_BUFFER); |
| 608 | (void)fclose(yyin); |
| 609 | if (yyfilename != NULL) |
| 610 | free(yyfilename); |
| 611 | yyfilename = NULL; |
| 612 | include = include_stack.slh_first; |
| 613 | if (include != NULL) { |
| 614 | yy_switch_to_buffer(include->buffer); |
| 615 | yylineno = include->lineno; |
| 616 | yyfilename = include->filename; |
| 617 | SLIST_REMOVE_HEAD(&include_stack, links); |
| 618 | free(include); |
| 619 | return (0); |
| 620 | } |
| 621 | return (1); |
| 622 | } |