Annotation of src/usr.bin/make/varmodifiers.c, Revision 1.16
1.7 espie 1: /* $OpenPackages$ */
1.15 espie 2: /* $OpenBSD: varmodifiers.c,v 1.14 2005/07/15 20:43:23 espie Exp $ */
1.1 espie 3: /* $NetBSD: var.c,v 1.18 1997/03/18 19:24:46 christos Exp $ */
4:
5: /*
6: * Copyright (c) 1999 Marc Espie.
7: *
8: * Extensive code changes for the OpenBSD project.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
20: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
23: * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30: */
31: /*
32: * Copyright (c) 1988, 1989, 1990, 1993
33: * The Regents of the University of California. All rights reserved.
34: * Copyright (c) 1989 by Berkeley Softworks
35: * All rights reserved.
36: *
37: * This code is derived from software contributed to Berkeley by
38: * Adam de Boor.
39: *
40: * Redistribution and use in source and binary forms, with or without
41: * modification, are permitted provided that the following conditions
42: * are met:
43: * 1. Redistributions of source code must retain the above copyright
44: * notice, this list of conditions and the following disclaimer.
45: * 2. Redistributions in binary form must reproduce the above copyright
46: * notice, this list of conditions and the following disclaimer in the
47: * documentation and/or other materials provided with the distribution.
1.11 millert 48: * 3. Neither the name of the University nor the names of its contributors
1.1 espie 49: * may be used to endorse or promote products derived from this software
50: * without specific prior written permission.
51: *
52: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62: * SUCH DAMAGE.
63: */
64:
1.7 espie 65: /* VarModifiers_Apply is mostly a constituent function of Var_Parse, it
66: * is also called directly by Var_SubstVar. */
67:
68:
1.9 espie 69: #include <ctype.h>
70: #include <sys/types.h>
1.1 espie 71: #ifndef MAKE_BOOTSTRAP
1.9 espie 72: #include <regex.h>
1.1 espie 73: #endif
1.9 espie 74: #include <stddef.h>
75: #include <stdio.h>
76: #include <stdlib.h>
77: #include <string.h>
78: #include "config.h"
79: #include "defines.h"
1.1 espie 80: #include "buf.h"
1.9 espie 81: #include "var.h"
1.1 espie 82: #include "varmodifiers.h"
1.9 espie 83: #include "varname.h"
84: #include "targ.h"
85: #include "error.h"
86: #include "str.h"
87: #include "cmd_exec.h"
88: #include "memory.h"
89: #include "gnode.h"
90:
1.1 espie 91:
92: /* Var*Pattern flags */
93: #define VAR_SUB_GLOBAL 0x01 /* Apply substitution globally */
94: #define VAR_SUB_ONE 0x02 /* Apply substitution to one word */
1.7 espie 95: #define VAR_SUB_MATCHED 0x04 /* There was a match */
96: #define VAR_MATCH_START 0x08 /* Match at start of word */
1.1 espie 97: #define VAR_MATCH_END 0x10 /* Match at end of word */
98:
1.7 espie 99: /* Modifiers flags */
100: #define VAR_EQUAL 0x20
101: #define VAR_MAY_EQUAL 0x40
102: #define VAR_ADD_EQUAL 0x80
103: #define VAR_BANG_EQUAL 0x100
104:
1.1 espie 105: typedef struct {
1.7 espie 106: char *lbuffer; /* left string to free */
107: char *lhs; /* String to match */
108: size_t leftLen; /* Length of string */
109: char *rhs; /* Replacement string (w/ &'s removed) */
110: size_t rightLen; /* Length of replacement */
111: int flags;
1.1 espie 112: } VarPattern;
113:
1.7 espie 114: struct LoopStuff {
1.15 espie 115: struct LoopVar *var;
1.7 espie 116: char *expand;
1.9 espie 117: bool err;
1.7 espie 118: };
119:
1.9 espie 120: static bool VarHead(struct Name *, bool, Buffer, void *);
121: static bool VarTail(struct Name *, bool, Buffer, void *);
122: static bool VarSuffix(struct Name *, bool, Buffer, void *);
123: static bool VarRoot(struct Name *, bool, Buffer, void *);
124: static bool VarMatch(struct Name *, bool, Buffer, void *);
125: static bool VarSYSVMatch(struct Name *, bool, Buffer, void *);
126: static bool VarNoMatch(struct Name *, bool, Buffer, void *);
127: static bool VarUniq(struct Name *, bool, Buffer, void *);
128: static bool VarLoop(struct Name *, bool, Buffer, void *);
1.7 espie 129:
130:
1.1 espie 131: #ifndef MAKE_BOOTSTRAP
1.7 espie 132: static void VarREError(int, regex_t *, const char *);
1.9 espie 133: static bool VarRESubstitute(struct Name *, bool, Buffer, void *);
1.7 espie 134: static char *do_regex(const char *, const struct Name *, void *);
135:
1.1 espie 136: typedef struct {
137: regex_t re;
1.7 espie 138: int nsub;
1.1 espie 139: regmatch_t *matches;
140: char *replace;
1.7 espie 141: int flags;
1.1 espie 142: } VarREPattern;
143: #endif
144:
1.9 espie 145: static bool VarSubstitute(struct Name *, bool, Buffer, void *);
1.7 espie 146: static char *VarGetPattern(SymTable *, int, const char **, int, int,
147: size_t *, VarPattern *);
148: static char *VarQuote(const char *, const struct Name *, void *);
1.9 espie 149: static char *VarModify(char *, bool (*)(struct Name *, bool, Buffer, void *), void *);
1.7 espie 150:
1.9 espie 151: static void *check_empty(const char **, SymTable *, bool, int);
1.7 espie 152: static char *do_upper(const char *, const struct Name *, void *);
153: static char *do_lower(const char *, const struct Name *, void *);
1.9 espie 154: static void *check_shcmd(const char **, SymTable *, bool, int);
1.7 espie 155: static char *do_shcmd(const char *, const struct Name *, void *);
156: static char *do_sort(const char *, const struct Name *, void *);
157: static char *finish_loop(const char *, const struct Name *, void *);
158: static int NameCompare(const void *, const void *);
159: static char *do_label(const char *, const struct Name *, void *);
160: static char *do_path(const char *, const struct Name *, void *);
161: static char *do_def(const char *, const struct Name *, void *);
162: static char *do_undef(const char *, const struct Name *, void *);
163: static char *do_assign(const char *, const struct Name *, void *);
164: static char *do_exec(const char *, const struct Name *, void *);
165:
1.9 espie 166: static void *assign_get_value(const char **, SymTable *, bool, int);
167: static void *get_cmd(const char **, SymTable *, bool, int);
168: static void *get_value(const char **, SymTable *, bool, int);
169: static void *get_stringarg(const char **, SymTable *, bool, int);
1.7 espie 170: static void free_stringarg(void *);
1.9 espie 171: static void *get_patternarg(const char **, SymTable *, bool, int);
172: static void *get_spatternarg(const char **, SymTable *, bool, int);
1.10 espie 173: static void *common_get_patternarg(const char **, SymTable *, bool, int, bool);
1.7 espie 174: static void free_patternarg(void *);
175: static void free_looparg(void *);
1.9 espie 176: static void *get_sysvpattern(const char **, SymTable *, bool, int);
177: static void *get_loop(const char **, SymTable *, bool, int);
1.7 espie 178: static char *LoopGrab(const char **);
179:
180: static struct Name dummy;
181: static struct Name *dummy_arg = &dummy;
182:
183: static struct modifier {
1.9 espie 184: bool atstart;
185: void * (*getarg)(const char **, SymTable *, bool, int);
1.7 espie 186: char * (*apply)(const char *, const struct Name *, void *);
1.9 espie 187: bool (*word_apply)(struct Name *, bool, Buffer, void *);
1.7 espie 188: void (*freearg)(void *);
189: } *choose_mod[256],
1.9 espie 190: match_mod = {false, get_stringarg, NULL, VarMatch, free_stringarg},
191: nomatch_mod = {false, get_stringarg, NULL, VarNoMatch, free_stringarg},
192: subst_mod = {false, get_spatternarg, NULL, VarSubstitute, free_patternarg},
1.1 espie 193: #ifndef MAKE_BOOTSTRAP
1.9 espie 194: resubst_mod = {false, get_patternarg, do_regex, NULL, free_patternarg},
1.1 espie 195: #endif
1.9 espie 196: quote_mod = {false, check_empty, VarQuote, NULL , NULL},
197: tail_mod = {false, check_empty, NULL, VarTail, NULL},
198: head_mod = {false, check_empty, NULL, VarHead, NULL},
199: suffix_mod = {false, check_empty, NULL, VarSuffix, NULL},
200: root_mod = {false, check_empty, NULL, VarRoot, NULL},
201: upper_mod = {false, check_empty, do_upper, NULL, NULL},
202: lower_mod = {false, check_empty, do_lower, NULL, NULL},
203: shcmd_mod = {false, check_shcmd, do_shcmd, NULL, NULL},
204: sysv_mod = {false, get_sysvpattern, NULL, VarSYSVMatch, free_patternarg},
205: uniq_mod = {false, check_empty, NULL, VarUniq, NULL},
206: sort_mod = {false, check_empty, do_sort, NULL, NULL},
207: loop_mod = {false, get_loop, finish_loop, VarLoop, free_looparg},
208: undef_mod = {true, get_value, do_undef, NULL, NULL},
209: def_mod = {true, get_value, do_def, NULL, NULL},
210: label_mod = {true, check_empty, do_label, NULL, NULL},
211: path_mod = {true, check_empty, do_path, NULL, NULL},
212: assign_mod = {true, assign_get_value, do_assign, NULL, free_patternarg},
213: exec_mod = {true, get_cmd, do_exec, NULL, free_patternarg}
1.7 espie 214: ;
1.1 espie 215:
1.7 espie 216: void
217: VarModifiers_Init()
1.1 espie 218: {
1.7 espie 219: choose_mod['M'] = &match_mod;
220: choose_mod['N'] = &nomatch_mod;
221: choose_mod['S'] = &subst_mod;
222: #ifndef MAKE_BOOTSTRAP
223: choose_mod['C'] = &resubst_mod;
224: #endif
225: choose_mod['Q'] = "e_mod;
226: choose_mod['T'] = &tail_mod;
227: choose_mod['H'] = &head_mod;
228: choose_mod['E'] = &suffix_mod;
229: choose_mod['R'] = &root_mod;
230: if (FEATURES(FEATURE_UPPERLOWER)) {
231: choose_mod['U'] = &upper_mod;
232: choose_mod['L'] = &lower_mod;
233: }
234: if (FEATURES(FEATURE_SUNSHCMD))
235: choose_mod['s'] = &shcmd_mod;
236: if (FEATURES(FEATURE_UNIQ))
237: choose_mod['u'] = &uniq_mod;
238: if (FEATURES(FEATURE_SORT))
239: choose_mod['O'] = &sort_mod;
240: if (FEATURES(FEATURE_ODE)) {
241: choose_mod['@'] = &loop_mod;
242: choose_mod['D'] = &def_mod;
243: choose_mod['U'] = &undef_mod;
244: choose_mod['L'] = &label_mod;
245: choose_mod['P'] = &path_mod;
246: }
247: if (FEATURES(FEATURE_ASSIGN))
248: choose_mod[':'] = &assign_mod;
249: if (FEATURES(FEATURE_EXECMOD))
250: choose_mod['!'] = &exec_mod;
1.1 espie 251: }
252:
1.7 espie 253: /* All modifiers handle addSpace (need to add a space before placing the
254: * next word into the buffer) and propagate it when necessary.
1.1 espie 255: */
256:
257: /*-
258: *-----------------------------------------------------------------------
259: * VarHead --
1.7 espie 260: * Remove the tail of the given word and add the result to the given
1.1 espie 261: * buffer.
262: *-----------------------------------------------------------------------
263: */
1.9 espie 264: static bool
1.13 espie 265: VarHead(struct Name *word, bool addSpace, Buffer buf, void *dummy UNUSED)
1.1 espie 266: {
1.6 espie 267: const char *slash;
1.1 espie 268:
1.9 espie 269: slash = Str_rchri(word->s, word->e, '/');
1.1 espie 270: if (slash != NULL) {
271: if (addSpace)
272: Buf_AddSpace(buf);
1.9 espie 273: Buf_Addi(buf, word->s, slash);
1.1 espie 274: } else {
1.7 espie 275: /* If no directory part, give . (q.v. the POSIX standard). */
1.1 espie 276: if (addSpace)
277: Buf_AddString(buf, " .");
278: else
279: Buf_AddChar(buf, '.');
280: }
1.9 espie 281: return true;
1.1 espie 282: }
283:
284: /*-
285: *-----------------------------------------------------------------------
286: * VarTail --
1.7 espie 287: * Remove the head of the given word add the result to the given
1.1 espie 288: * buffer.
289: *-----------------------------------------------------------------------
290: */
1.9 espie 291: static bool
1.13 espie 292: VarTail(struct Name *word, bool addSpace, Buffer buf, void *dummy UNUSED)
1.1 espie 293: {
1.6 espie 294: const char *slash;
1.1 espie 295:
1.7 espie 296: if (addSpace)
1.1 espie 297: Buf_AddSpace(buf);
1.9 espie 298: slash = Str_rchri(word->s, word->e, '/');
1.1 espie 299: if (slash != NULL)
1.9 espie 300: Buf_Addi(buf, slash+1, word->e);
1.1 espie 301: else
1.9 espie 302: Buf_Addi(buf, word->s, word->e);
303: return true;
1.1 espie 304: }
305:
306: /*-
307: *-----------------------------------------------------------------------
308: * VarSuffix --
1.7 espie 309: * Add the suffix of the given word to the given buffer.
1.1 espie 310: *-----------------------------------------------------------------------
311: */
1.9 espie 312: static bool
1.13 espie 313: VarSuffix(struct Name *word, bool addSpace, Buffer buf, void *dummy UNUSED)
1.1 espie 314: {
1.6 espie 315: const char *dot;
1.1 espie 316:
1.9 espie 317: dot = Str_rchri(word->s, word->e, '.');
1.1 espie 318: if (dot != NULL) {
319: if (addSpace)
320: Buf_AddSpace(buf);
1.9 espie 321: Buf_Addi(buf, dot+1, word->e);
322: addSpace = true;
1.1 espie 323: }
1.6 espie 324: return addSpace;
1.1 espie 325: }
326:
327: /*-
328: *-----------------------------------------------------------------------
329: * VarRoot --
1.7 espie 330: * Remove the suffix of the given word and add the result to the
1.1 espie 331: * buffer.
332: *-----------------------------------------------------------------------
333: */
1.9 espie 334: static bool
1.13 espie 335: VarRoot(struct Name *word, bool addSpace, Buffer buf, void *dummy UNUSED)
1.1 espie 336: {
1.6 espie 337: const char *dot;
1.1 espie 338:
339: if (addSpace)
340: Buf_AddSpace(buf);
1.9 espie 341: dot = Str_rchri(word->s, word->e, '.');
1.1 espie 342: if (dot != NULL)
1.9 espie 343: Buf_Addi(buf, word->s, dot);
1.1 espie 344: else
1.9 espie 345: Buf_Addi(buf, word->s, word->e);
346: return true;
1.1 espie 347: }
348:
349: /*-
350: *-----------------------------------------------------------------------
351: * VarMatch --
1.7 espie 352: * Add the word to the buffer if it matches the given pattern.
1.1 espie 353: *-----------------------------------------------------------------------
354: */
1.9 espie 355: static bool
1.13 espie 356: VarMatch(struct Name *word, bool addSpace, Buffer buf,
357: void *pattern) /* Pattern the word must match */
1.7 espie 358: {
1.9 espie 359: const char *pat = (const char *)pattern;
360:
361: if (Str_Matchi(word->s, word->e, pat, strchr(pat, '\0'))) {
1.7 espie 362: if (addSpace)
363: Buf_AddSpace(buf);
1.9 espie 364: Buf_Addi(buf, word->s, word->e);
365: return true;
1.7 espie 366: } else
367: return addSpace;
368: }
369:
370: /*-
371: *-----------------------------------------------------------------------
372: * VarNoMatch --
373: * Add the word to the buffer if it doesn't match the given pattern.
374: *-----------------------------------------------------------------------
375: */
1.9 espie 376: static bool
1.13 espie 377: VarNoMatch(struct Name *word, bool addSpace, Buffer buf,
378: void *pattern) /* Pattern the word must not match */
1.7 espie 379: {
1.9 espie 380: const char *pat = (const char *)pattern;
381:
382: if (!Str_Matchi(word->s, word->e, pat, strchr(pat, '\0'))) {
1.7 espie 383: if (addSpace)
384: Buf_AddSpace(buf);
1.9 espie 385: Buf_Addi(buf, word->s, word->e);
386: return true;
1.7 espie 387: } else
388: return addSpace;
389: }
390:
1.9 espie 391: static bool
1.13 espie 392: VarUniq(struct Name *word, bool addSpace, Buffer buf, void *lastp)
1.1 espie 393: {
1.7 espie 394: struct Name *last = (struct Name *)lastp;
395:
396: /* does not match */
397: if (last->s == NULL || last->e - last->s != word->e - word->s ||
398: strncmp(word->s, last->s, word->e - word->s) != 0) {
1.1 espie 399: if (addSpace)
400: Buf_AddSpace(buf);
1.9 espie 401: Buf_Addi(buf, word->s, word->e);
402: addSpace = true;
1.1 espie 403: }
1.7 espie 404: last->s = word->s;
405: last->e = word->e;
1.1 espie 406: return addSpace;
407: }
408:
1.9 espie 409: static bool
1.13 espie 410: VarLoop(struct Name *word, bool addSpace, Buffer buf, void *vp)
1.7 espie 411: {
412: struct LoopStuff *v = (struct LoopStuff *)vp;
413:
414: if (addSpace)
415: Buf_AddSpace(buf);
416: Var_SubstVar(buf, v->expand, v->var, word->s);
1.9 espie 417: return true;
1.7 espie 418: }
419:
420: static char *
1.13 espie 421: finish_loop(const char *s, const struct Name *n UNUSED , void *p)
1.7 espie 422: {
423: struct LoopStuff *l = (struct LoopStuff *)p;
424:
1.15 espie 425: return Var_Subst(s, NULL, l->err);
1.7 espie 426: }
427:
428: static int
1.13 espie 429: NameCompare(const void *ap, const void *bp)
1.7 espie 430: {
431: struct Name *a, *b;
432: size_t n, m;
433: int c;
434:
435: a = (struct Name *)ap;
436: b = (struct Name *)bp;
437: n = a->e - a->s;
438: m = b->e - b->s;
439: if (n < m) {
440: c = strncmp(a->s, b->s, n);
441: if (c != 0)
442: return c;
443: else
444: return -1;
445: } else if (m < n) {
446: c = strncmp(a->s, b->s, m);
447: if (c != 0)
448: return c;
449: else
450: return 1;
451: } else
452: return strncmp(a->s, b->s, n);
453: }
454:
455: static char *
1.13 espie 456: do_sort(const char *s, const struct Name *dummy UNUSED, void *arg UNUSED)
1.7 espie 457: {
458: struct Name *t;
459: unsigned long n, i, j;
460: const char *start, *end;
461:
462: n = 1024; /* start at 1024 words */
463: t = (struct Name *)emalloc(sizeof(struct Name) * n);
464: start = s;
465: end = start;
466:
467: for (i = 0;; i++) {
468: if (i == n) {
469: n *= 2;
470: t = (struct Name *)erealloc(t, sizeof(struct Name) * n);
471: }
472: start = iterate_words(&end);
473: if (start == NULL)
474: break;
475: t[i].s = start;
476: t[i].e = end;
477: }
478: if (i > 0) {
479: BUFFER buf;
480:
481: Buf_Init(&buf, end - s);
482: qsort(t, i, sizeof(struct Name), NameCompare);
1.9 espie 483: Buf_Addi(&buf, t[0].s, t[0].e);
1.7 espie 484: for (j = 1; j < i; j++) {
485: Buf_AddSpace(&buf);
1.9 espie 486: Buf_Addi(&buf, t[j].s, t[j].e);
1.7 espie 487: }
488: free(t);
489: return Buf_Retrieve(&buf);
490: } else {
491: free(t);
492: return "";
493: }
494: }
495:
496: static char *
1.13 espie 497: do_label(const char *s UNUSED, const struct Name *n, void *arg UNUSED)
1.7 espie 498: {
1.9 espie 499: return Str_dupi(n->s, n->e);
1.7 espie 500: }
501:
502: static char *
1.13 espie 503: do_path(const char *s UNUSED, const struct Name *n, void *arg UNUSED)
1.7 espie 504: {
505: GNode *gn;
506:
1.9 espie 507: gn = Targ_FindNodei(n->s, n->e, TARG_NOCREATE);
1.7 espie 508: if (gn == NULL)
1.9 espie 509: return Str_dupi(n->s, n->e);
1.7 espie 510: else
511: return strdup(gn->path);
512: }
513:
514: static char *
1.13 espie 515: do_def(const char *s, const struct Name *n UNUSED, void *arg)
1.7 espie 516: {
517: VarPattern *v = (VarPattern *)arg;
518: if (s == NULL) {
519: free_patternarg(v);
520: return NULL;
521: } else
522: return v->lbuffer;
523: }
524:
525: static char *
1.13 espie 526: do_undef(const char *s, const struct Name *n UNUSED, void *arg)
1.7 espie 527: {
528: VarPattern *v = (VarPattern *)arg;
529: if (s != NULL) {
530: free_patternarg(v);
531: return NULL;
532: } else
533: return v->lbuffer;
534: }
535:
536: static char *
1.13 espie 537: do_assign(const char *s, const struct Name *n, void *arg)
1.7 espie 538: {
539: VarPattern *v = (VarPattern *)arg;
540: char *msg;
541: char *result;
542:
543: switch (v->flags) {
544: case VAR_EQUAL:
1.9 espie 545: Var_Seti(n->s, n->e, v->lbuffer, VAR_GLOBAL);
1.7 espie 546: break;
547: case VAR_MAY_EQUAL:
548: if (s == NULL)
1.9 espie 549: Var_Seti(n->s, n->e, v->lbuffer, VAR_GLOBAL);
1.7 espie 550: break;
551: case VAR_ADD_EQUAL:
552: if (s == NULL)
1.9 espie 553: Var_Seti(n->s, n->e, v->lbuffer, VAR_GLOBAL);
1.7 espie 554: else
1.9 espie 555: Var_Appendi(n->s, n->e, v->lbuffer, VAR_GLOBAL);
1.7 espie 556: break;
557: case VAR_BANG_EQUAL:
558: result = Cmd_Exec(v->lbuffer, &msg);
559: if (result != NULL) {
1.9 espie 560: Var_Seti(n->s, n->e, result, VAR_GLOBAL);
1.7 espie 561: free(result);
562: } else
563: Error(msg, v->lbuffer);
564: break;
565:
566: }
567: return NULL;
568: }
569:
570: static char *
1.13 espie 571: do_exec(const char *s UNUSED, const struct Name *n UNUSED, void *arg)
1.7 espie 572: {
573: VarPattern *v = (VarPattern *)arg;
574: char *msg;
575: char *result;
576:
577: result = Cmd_Exec(v->lbuffer, &msg);
578: if (result == NULL)
579: Error(msg, v->lbuffer);
580: return result;
581: }
582:
1.1 espie 583: /*-
584: *-----------------------------------------------------------------------
585: * VarSYSVMatch --
1.7 espie 586: * Add the word to the buffer if it matches the given pattern.
587: * Used to implement the System V % modifiers.
1.1 espie 588: *-----------------------------------------------------------------------
589: */
1.9 espie 590: static bool
1.13 espie 591: VarSYSVMatch(struct Name *word, bool addSpace, Buffer buf,
592: void *patp) /* Pattern the word must match */
1.7 espie 593: {
594: size_t len;
595: const char *ptr;
596: VarPattern *pat = (VarPattern *)patp;
1.1 espie 597:
1.7 espie 598: if (*word->s != '\0') {
1.1 espie 599: if (addSpace)
600: Buf_AddSpace(buf);
1.7 espie 601: if ((ptr = Str_SYSVMatch(word->s, pat->lhs, &len)) != NULL)
1.1 espie 602: Str_SYSVSubst(buf, pat->rhs, ptr, len);
603: else
1.9 espie 604: Buf_Addi(buf, word->s, word->e);
605: return true;
1.7 espie 606: } else
607: return addSpace;
1.1 espie 608: }
609:
1.7 espie 610: void *
1.13 espie 611: get_sysvpattern(const char **p, SymTable *ctxt UNUSED, bool err UNUSED,
612: int endc)
1.1 espie 613: {
1.8 espie 614: VarPattern *pattern;
1.7 espie 615: const char *cp, *cp2;
616: int cnt = 0;
1.14 espie 617: char startc = endc == ')' ? '(' : '{';
1.7 espie 618:
619: for (cp = *p;; cp++) {
620: if (*cp == '=' && cnt == 0)
621: break;
622: if (*cp == '\0')
623: return NULL;
624: if (*cp == startc)
625: cnt++;
626: else if (*cp == endc) {
627: cnt--;
628: if (cnt < 0)
629: return NULL;
630: }
631: }
632: for (cp2 = cp+1;; cp2++) {
633: if ((*cp2 == ':' || *cp2 == endc) && cnt == 0)
634: break;
1.14 espie 635: if (*cp2 == '\0')
636: return NULL;
1.7 espie 637: if (*cp2 == startc)
638: cnt++;
639: else if (*cp2 == endc) {
640: cnt--;
641: if (cnt < 0)
642: return NULL;
643: }
1.1 espie 644: }
1.7 espie 645:
1.8 espie 646: pattern = (VarPattern *)emalloc(sizeof(VarPattern));
1.9 espie 647: pattern->lbuffer = pattern->lhs = Str_dupi(*p, cp);
1.8 espie 648: pattern->leftLen = cp - *p;
1.9 espie 649: pattern->rhs = Str_dupi(cp+1, cp2);
1.8 espie 650: pattern->rightLen = cp2 - (cp+1);
651: pattern->flags = 0;
1.7 espie 652: *p = cp2;
1.8 espie 653: return pattern;
1.1 espie 654: }
655:
656:
657: /*-
658: *-----------------------------------------------------------------------
659: * VarSubstitute --
1.7 espie 660: * Perform a string-substitution on the given word, Adding the
661: * result to the given buffer.
1.1 espie 662: *-----------------------------------------------------------------------
663: */
1.9 espie 664: static bool
1.13 espie 665: VarSubstitute(struct Name *word, bool addSpace, Buffer buf,
666: void *patternp) /* Pattern for substitution */
1.7 espie 667: {
668: size_t wordLen; /* Length of word */
669: const char *cp; /* General pointer */
670: VarPattern *pattern = (VarPattern *)patternp;
1.1 espie 671:
1.7 espie 672: wordLen = word->e - word->s;
1.1 espie 673: if ((pattern->flags & (VAR_SUB_ONE|VAR_SUB_MATCHED)) !=
674: (VAR_SUB_ONE|VAR_SUB_MATCHED)) {
1.7 espie 675: /* Still substituting -- break it down into simple anchored cases
676: * and if none of them fits, perform the general substitution case. */
1.1 espie 677: if ((pattern->flags & VAR_MATCH_START) &&
1.7 espie 678: (strncmp(word->s, pattern->lhs, pattern->leftLen) == 0)) {
679: /* Anchored at start and beginning of word matches pattern. */
1.1 espie 680: if ((pattern->flags & VAR_MATCH_END) &&
681: (wordLen == pattern->leftLen)) {
1.7 espie 682: /* Also anchored at end and matches to the end (word
1.1 espie 683: * is same length as pattern) add space and rhs only
1.7 espie 684: * if rhs is non-null. */
1.1 espie 685: if (pattern->rightLen != 0) {
686: if (addSpace)
687: Buf_AddSpace(buf);
1.9 espie 688: addSpace = true;
1.7 espie 689: Buf_AddChars(buf, pattern->rightLen,
690: pattern->rhs);
1.1 espie 691: }
692: pattern->flags |= VAR_SUB_MATCHED;
693: } else if (pattern->flags & VAR_MATCH_END) {
1.7 espie 694: /* Doesn't match to end -- copy word wholesale. */
1.1 espie 695: goto nosub;
696: } else {
1.7 espie 697: /* Matches at start but need to copy in
698: * trailing characters. */
1.1 espie 699: if ((pattern->rightLen + wordLen - pattern->leftLen) != 0){
700: if (addSpace)
701: Buf_AddSpace(buf);
1.9 espie 702: addSpace = true;
1.1 espie 703: }
704: Buf_AddChars(buf, pattern->rightLen, pattern->rhs);
705: Buf_AddChars(buf, wordLen - pattern->leftLen,
1.7 espie 706: word->s + pattern->leftLen);
1.1 espie 707: pattern->flags |= VAR_SUB_MATCHED;
708: }
709: } else if (pattern->flags & VAR_MATCH_START) {
1.7 espie 710: /* Had to match at start of word and didn't -- copy whole word. */
1.1 espie 711: goto nosub;
712: } else if (pattern->flags & VAR_MATCH_END) {
1.7 espie 713: /* Anchored at end, Find only place match could occur (leftLen
1.1 espie 714: * characters from the end of the word) and see if it does. Note
715: * that because the $ will be left at the end of the lhs, we have
1.7 espie 716: * to use strncmp. */
717: cp = word->s + (wordLen - pattern->leftLen);
718: if (cp >= word->s &&
719: strncmp(cp, pattern->lhs, pattern->leftLen) == 0) {
720: /* Match found. If we will place characters in the buffer,
1.1 espie 721: * add a space before hand as indicated by addSpace, then
722: * stuff in the initial, unmatched part of the word followed
1.7 espie 723: * by the right-hand-side. */
724: if (((cp - word->s) + pattern->rightLen) != 0) {
1.1 espie 725: if (addSpace)
726: Buf_AddSpace(buf);
1.9 espie 727: addSpace = true;
1.1 espie 728: }
1.9 espie 729: Buf_Addi(buf, word->s, cp);
1.1 espie 730: Buf_AddChars(buf, pattern->rightLen, pattern->rhs);
731: pattern->flags |= VAR_SUB_MATCHED;
732: } else {
1.7 espie 733: /* Had to match at end and didn't. Copy entire word. */
1.1 espie 734: goto nosub;
735: }
736: } else {
1.7 espie 737: /* Pattern is unanchored: search for the pattern in the word using
738: * strstr, copying unmatched portions and the
1.1 espie 739: * right-hand-side for each match found, handling non-global
740: * substitutions correctly, etc. When the loop is done, any
741: * remaining part of the word (word and wordLen are adjusted
742: * accordingly through the loop) is copied straight into the
743: * buffer.
1.9 espie 744: * addSpace is set to false as soon as a space is added to the
1.7 espie 745: * buffer. */
1.9 espie 746: bool done;
1.1 espie 747: size_t origSize;
748:
1.9 espie 749: done = false;
1.1 espie 750: origSize = Buf_Size(buf);
751: while (!done) {
1.7 espie 752: cp = strstr(word->s, pattern->lhs);
753: if (cp != NULL) {
754: if (addSpace && (cp - word->s) + pattern->rightLen != 0){
1.1 espie 755: Buf_AddSpace(buf);
1.9 espie 756: addSpace = false;
1.1 espie 757: }
1.9 espie 758: Buf_Addi(buf, word->s, cp);
1.1 espie 759: Buf_AddChars(buf, pattern->rightLen, pattern->rhs);
1.7 espie 760: wordLen -= (cp - word->s) + pattern->leftLen;
761: word->s = cp + pattern->leftLen;
762: if (wordLen == 0 || (pattern->flags & VAR_SUB_GLOBAL) == 0)
1.9 espie 763: done = true;
1.1 espie 764: pattern->flags |= VAR_SUB_MATCHED;
1.7 espie 765: } else
1.9 espie 766: done = true;
1.1 espie 767: }
768: if (wordLen != 0) {
769: if (addSpace)
770: Buf_AddSpace(buf);
1.7 espie 771: Buf_AddChars(buf, wordLen, word->s);
1.1 espie 772: }
1.7 espie 773: /* If added characters to the buffer, need to add a space
1.1 espie 774: * before we add any more. If we didn't add any, just return
1.7 espie 775: * the previous value of addSpace. */
776: return Buf_Size(buf) != origSize || addSpace;
1.1 espie 777: }
1.7 espie 778: return addSpace;
1.1 espie 779: }
780: nosub:
781: if (addSpace)
782: Buf_AddSpace(buf);
1.7 espie 783: Buf_AddChars(buf, wordLen, word->s);
1.9 espie 784: return true;
1.1 espie 785: }
786:
787: #ifndef MAKE_BOOTSTRAP
788: /*-
789: *-----------------------------------------------------------------------
790: * VarREError --
791: * Print the error caused by a regcomp or regexec call.
792: *-----------------------------------------------------------------------
793: */
794: static void
1.13 espie 795: VarREError(int err, regex_t *pat, const char *str)
1.1 espie 796: {
1.7 espie 797: char *errbuf;
798: int errlen;
1.1 espie 799:
800: errlen = regerror(err, pat, 0, 0);
801: errbuf = emalloc(errlen);
802: regerror(err, pat, errbuf, errlen);
803: Error("%s: %s", str, errbuf);
804: free(errbuf);
805: }
806:
807: /*-
808: *-----------------------------------------------------------------------
809: * VarRESubstitute --
810: * Perform a regex substitution on the given word, placing the
811: * result in the passed buffer.
812: *-----------------------------------------------------------------------
813: */
1.9 espie 814: static bool
1.13 espie 815: VarRESubstitute(struct Name *word, bool addSpace, Buffer buf, void *patternp)
1.7 espie 816: {
817: VarREPattern *pat;
818: int xrv;
819: const char *wp;
820: char *rp;
821: int added;
1.1 espie 822:
823: #define MAYBE_ADD_SPACE() \
1.7 espie 824: if (addSpace && !added) \
1.1 espie 825: Buf_AddSpace(buf); \
826: added = 1
827:
828: added = 0;
1.7 espie 829: wp = word->s;
1.1 espie 830: pat = patternp;
831:
832: if ((pat->flags & (VAR_SUB_ONE|VAR_SUB_MATCHED)) ==
833: (VAR_SUB_ONE|VAR_SUB_MATCHED))
834: xrv = REG_NOMATCH;
835: else {
836: tryagain:
837: xrv = regexec(&pat->re, wp, pat->nsub, pat->matches, 0);
838: }
839:
840: switch (xrv) {
841: case 0:
842: pat->flags |= VAR_SUB_MATCHED;
843: if (pat->matches[0].rm_so > 0) {
844: MAYBE_ADD_SPACE();
845: Buf_AddChars(buf, pat->matches[0].rm_so, wp);
846: }
847:
848: for (rp = pat->replace; *rp; rp++) {
1.7 espie 849: if (*rp == '\\' && (rp[1] == '&' || rp[1] == '\\')) {
1.1 espie 850: MAYBE_ADD_SPACE();
1.7 espie 851: Buf_AddChar(buf,rp[1]);
1.1 espie 852: rp++;
853: }
1.7 espie 854: else if (*rp == '&' || (*rp == '\\' && isdigit(rp[1]))) {
1.1 espie 855: int n;
856: const char *subbuf;
857: int sublen;
858: char errstr[3];
859:
860: if (*rp == '&') {
861: n = 0;
862: errstr[0] = '&';
863: errstr[1] = '\0';
864: } else {
865: n = rp[1] - '0';
866: errstr[0] = '\\';
867: errstr[1] = rp[1];
868: errstr[2] = '\0';
869: rp++;
870: }
871:
872: if (n > pat->nsub) {
873: Error("No subexpression %s", &errstr[0]);
874: subbuf = "";
875: sublen = 0;
1.7 espie 876: } else if (pat->matches[n].rm_so == -1 &&
877: pat->matches[n].rm_eo == -1) {
1.1 espie 878: Error("No match for subexpression %s", &errstr[0]);
879: subbuf = "";
880: sublen = 0;
1.7 espie 881: } else {
1.1 espie 882: subbuf = wp + pat->matches[n].rm_so;
883: sublen = pat->matches[n].rm_eo - pat->matches[n].rm_so;
884: }
885:
886: if (sublen > 0) {
887: MAYBE_ADD_SPACE();
888: Buf_AddChars(buf, sublen, subbuf);
889: }
890: } else {
891: MAYBE_ADD_SPACE();
892: Buf_AddChar(buf, *rp);
893: }
894: }
895: wp += pat->matches[0].rm_eo;
896: if (pat->flags & VAR_SUB_GLOBAL)
897: goto tryagain;
898: if (*wp) {
899: MAYBE_ADD_SPACE();
1.7 espie 900: Buf_AddString(buf, wp);
1.1 espie 901: }
902: break;
903: default:
904: VarREError(xrv, &pat->re, "Unexpected regex error");
905: /* fall through */
906: case REG_NOMATCH:
907: if (*wp) {
908: MAYBE_ADD_SPACE();
1.7 espie 909: Buf_AddString(buf, wp);
1.1 espie 910: }
911: break;
912: }
1.7 espie 913: return addSpace||added;
1.1 espie 914: }
915: #endif
916:
917: /*-
918: *-----------------------------------------------------------------------
919: * VarModify --
920: * Modify each of the words of the passed string using the given
921: * function. Used to implement all modifiers.
922: *
923: * Results:
924: * A string of all the words modified appropriately.
925: *-----------------------------------------------------------------------
926: */
927: static char *
1.13 espie 928: VarModify(char *str, /* String whose words should be trimmed */
1.7 espie 929: /* Function to use to modify them */
1.13 espie 930: bool (*modProc)(struct Name *, bool, Buffer, void *),
931: void *datum) /* Datum to pass it */
1.1 espie 932: {
1.7 espie 933: BUFFER buf; /* Buffer for the new string */
1.9 espie 934: bool addSpace; /* true if need to add a space to the
1.5 espie 935: * buffer before adding the trimmed
936: * word */
1.7 espie 937: struct Name word;
1.2 espie 938:
1.1 espie 939: Buf_Init(&buf, 0);
1.9 espie 940: addSpace = false;
1.1 espie 941:
1.7 espie 942: word.e = str;
1.1 espie 943:
1.7 espie 944: while ((word.s = iterate_words(&word.e)) != NULL) {
945: char termc;
1.1 espie 946:
1.7 espie 947: termc = *word.e;
948: *((char *)(word.e)) = '\0';
949: addSpace = (*modProc)(&word, addSpace, &buf, datum);
950: *((char *)(word.e)) = termc;
1.5 espie 951: }
1.1 espie 952: return Buf_Retrieve(&buf);
953: }
954:
955: /*-
956: *-----------------------------------------------------------------------
957: * VarGetPattern --
958: * Pass through the tstr looking for 1) escaped delimiters,
959: * '$'s and backslashes (place the escaped character in
960: * uninterpreted) and 2) unescaped $'s that aren't before
961: * the delimiter (expand the variable substitution).
962: * Return the expanded string or NULL if the delimiter was missing
963: * If pattern is specified, handle escaped ampersands, and replace
964: * unescaped ampersands with the lhs of the pattern.
965: *
966: * Results:
967: * A string of all the words modified appropriately.
968: * If length is specified, return the string length of the buffer
969: *-----------------------------------------------------------------------
970: */
971: static char *
1.13 espie 972: VarGetPattern(SymTable *ctxt, int err, const char **tstr, int delim1,
973: int delim2, size_t *length, VarPattern *pattern)
1.1 espie 974: {
1.7 espie 975: const char *cp;
976: char *result;
977: BUFFER buf;
978: size_t junk;
1.1 espie 979:
980: Buf_Init(&buf, 0);
981: if (length == NULL)
982: length = &junk;
983:
1.7 espie 984: #define IS_A_MATCH(cp, delim1, delim2) \
985: (cp[0] == '\\' && (cp[1] == delim1 || cp[1] == delim2 || \
986: cp[1] == '\\' || cp[1] == '$' || (pattern && cp[1] == '&')))
1.1 espie 987:
988: /*
989: * Skim through until the matching delimiter is found;
990: * pick up variable substitutions on the way. Also allow
991: * backslashes to quote the delimiter, $, and \, but don't
992: * touch other backslashes.
993: */
1.7 espie 994: for (cp = *tstr; *cp != '\0' && *cp != delim1 && *cp != delim2; cp++) {
995: if (IS_A_MATCH(cp, delim1, delim2)) {
1.1 espie 996: Buf_AddChar(&buf, cp[1]);
997: cp++;
998: } else if (*cp == '$') {
1.7 espie 999: /* Allowed at end of pattern */
1000: if (cp[1] == delim1 || cp[1] == delim2)
1001: Buf_AddChar(&buf, *cp);
1.1 espie 1002: else {
1.7 espie 1003: size_t len;
1004:
1005: /* If unescaped dollar sign not before the delimiter,
1006: * assume it's a variable substitution and recurse. */
1007: (void)Var_ParseBuffer(&buf, cp, ctxt, err, &len);
1.1 espie 1008: cp += len - 1;
1009: }
1.7 espie 1010: } else if (pattern && *cp == '&')
1.1 espie 1011: Buf_AddChars(&buf, pattern->leftLen, pattern->lhs);
1012: else
1013: Buf_AddChar(&buf, *cp);
1014: }
1015:
1.7 espie 1016: *length = Buf_Size(&buf);
1017: result = Buf_Retrieve(&buf);
1018:
1019: if (*cp != delim1 && *cp != delim2) {
1.1 espie 1020: *tstr = cp;
1021: *length = 0;
1.7 espie 1022: free(result);
1.1 espie 1023: return NULL;
1024: }
1025: else {
1026: *tstr = ++cp;
1.7 espie 1027: return result;
1028: }
1029: }
1030:
1031: /*-
1032: *-----------------------------------------------------------------------
1033: * VarQuote --
1034: * Quote shell meta-characters in the string
1035: *
1036: * Results:
1037: * The quoted string
1038: *-----------------------------------------------------------------------
1039: */
1040: static char *
1.13 espie 1041: VarQuote(const char *str, const struct Name *n UNUSED, void *dummy UNUSED)
1.7 espie 1042: {
1043:
1044: BUFFER buf;
1045: /* This should cover most shells :-( */
1046: static char meta[] = "\n \t'`\";&<>()|*?{}[]\\$!#^~";
1047:
1048: Buf_Init(&buf, MAKE_BSIZE);
1049: for (; *str; str++) {
1050: if (strchr(meta, *str) != NULL)
1051: Buf_AddChar(&buf, '\\');
1052: Buf_AddChar(&buf, *str);
1053: }
1054: return Buf_Retrieve(&buf);
1055: }
1056:
1057: static void *
1.13 espie 1058: check_empty(const char **p, SymTable *ctxt UNUSED, bool b UNUSED, int endc)
1.7 espie 1059: {
1060: dummy_arg->s = NULL;
1061: if ((*p)[1] == endc || (*p)[1] == ':') {
1062: (*p)++;
1063: return dummy_arg;
1064: } else
1065: return NULL;
1066: }
1067:
1068: static void *
1.13 espie 1069: check_shcmd(const char **p, SymTable *ctxt UNUSED, bool b UNUSED, int endc)
1.7 espie 1070: {
1071: if ((*p)[1] == 'h' && ((*p)[2] == endc || (*p)[2] == ':')) {
1072: (*p)+=2;
1073: return dummy_arg;
1074: } else
1075: return NULL;
1076: }
1077:
1078:
1079: static char *
1.13 espie 1080: do_shcmd(const char *s, const struct Name *n UNUSED, void *arg UNUSED)
1.7 espie 1081: {
1082: char *err;
1083: char *t;
1084:
1085: t = Cmd_Exec(s, &err);
1086: if (err)
1087: Error(err, s);
1088: return t;
1089: }
1090:
1091: static void *
1.13 espie 1092: get_stringarg(const char **p, SymTable *ctxt UNUSED, bool b UNUSED, int endc)
1.7 espie 1093: {
1094: const char *cp;
1095: char *s;
1096:
1097: for (cp = *p + 1; *cp != ':' && *cp != endc; cp++) {
1098: if (*cp == '\\') {
1099: if (cp[1] == ':' || cp[1] == endc || cp[1] == '\\')
1100: cp++;
1101: } else if (*cp == '\0')
1102: return NULL;
1.1 espie 1103: }
1.9 espie 1104: s = escape_dupi(*p+1, cp, ":)}");
1.7 espie 1105: *p = cp;
1106: return s;
1107: }
1108:
1109: static void
1.13 espie 1110: free_stringarg(void *arg)
1.7 espie 1111: {
1112: free(arg);
1113: }
1114:
1115: static char *
1.13 espie 1116: do_upper(const char *s, const struct Name *n UNUSED, void *arg UNUSED)
1.7 espie 1117: {
1118: size_t len, i;
1119: char *t;
1120:
1121: len = strlen(s);
1122: t = emalloc(len+1);
1123: for (i = 0; i < len; i++)
1124: t[i] = toupper(s[i]);
1125: t[len] = '\0';
1126: return t;
1127: }
1128:
1129: static char *
1.13 espie 1130: do_lower(const char *s, const struct Name *n UNUSED, void *arg UNUSED)
1.7 espie 1131: {
1132: size_t len, i;
1133: char *t;
1134:
1135: len = strlen(s);
1136: t = emalloc(len+1);
1137: for (i = 0; i < len; i++)
1138: t[i] = tolower(s[i]);
1139: t[len] = '\0';
1140: return t;
1.1 espie 1141: }
1142:
1.10 espie 1143: static void *
1.13 espie 1144: get_patternarg(const char **p, SymTable *ctxt, bool err, int endc)
1.10 espie 1145: {
1146: return common_get_patternarg(p, ctxt, err, endc, false);
1147: }
1148:
1.7 espie 1149: /* Extract anchors */
1150: static void *
1.13 espie 1151: get_spatternarg(const char **p, SymTable *ctxt, bool err, int endc)
1.7 espie 1152: {
1153: VarPattern *pattern;
1154:
1.10 espie 1155: pattern = common_get_patternarg(p, ctxt, err, endc, true);
1.7 espie 1156: if (pattern != NULL && pattern->leftLen > 0) {
1157: if (pattern->lhs[pattern->leftLen-1] == '$') {
1158: pattern->leftLen--;
1159: pattern->flags |= VAR_MATCH_END;
1160: }
1161: if (pattern->lhs[0] == '^') {
1162: pattern->lhs++;
1163: pattern->leftLen--;
1164: pattern->flags |= VAR_MATCH_START;
1165: }
1166: }
1167: return pattern;
1168: }
1169:
1170: static void
1.13 espie 1171: free_looparg(void *arg)
1.1 espie 1172: {
1.7 espie 1173: struct LoopStuff *l = (struct LoopStuff *)arg;
1.1 espie 1174:
1.15 espie 1175: Var_DeleteLoopVar(l->var);
1.7 espie 1176: free(l->expand);
1177: }
1.1 espie 1178:
1.7 espie 1179: static char *
1.13 espie 1180: LoopGrab(const char **s)
1.7 espie 1181: {
1182: const char *p, *start;
1.1 espie 1183:
1.7 espie 1184: start = *s;
1185: for (p = start; *p != '@'; p++) {
1186: if (*p == '\\')
1187: p++;
1188: if (*p == 0)
1189: return NULL;
1190: }
1191: *s = p+1;
1.9 espie 1192: return escape_dupi(start, p, "@\\");
1.7 espie 1193: }
1194:
1195: static void *
1.13 espie 1196: get_loop(const char **p, SymTable *ctxt, bool err, int endc)
1.7 espie 1197: {
1198: static struct LoopStuff loop;
1199: const char *s;
1.15 espie 1200: const char *var;
1.1 espie 1201:
1.7 espie 1202: s = *p +1;
1.1 espie 1203:
1.7 espie 1204: loop.var = NULL;
1205: loop.expand = NULL;
1206: loop.err = err;
1.15 espie 1207: var = LoopGrab(&s);
1208: if (var != NULL) {
1.7 espie 1209: loop.expand = LoopGrab(&s);
1210: if (*s == endc || *s == ':') {
1211: *p = s;
1.15 espie 1212: loop.var = Var_NewLoopVar(var, NULL);
1.7 espie 1213: return &loop;
1214: }
1215: }
1216: free_looparg(&loop);
1217: return NULL;
1218: }
1.1 espie 1219:
1.7 espie 1220: static void *
1.13 espie 1221: common_get_patternarg(const char **p, SymTable *ctxt, bool err, int endc,
1222: bool dosubst)
1.7 espie 1223: {
1.8 espie 1224: VarPattern *pattern;
1.7 espie 1225: char delim;
1226: const char *s;
1.1 espie 1227:
1.8 espie 1228: pattern = (VarPattern *)emalloc(sizeof(VarPattern));
1229: pattern->flags = 0;
1.7 espie 1230: s = *p;
1.1 espie 1231:
1.7 espie 1232: delim = s[1];
1233: if (delim == '\0')
1234: return NULL;
1235: s += 2;
1.1 espie 1236:
1.8 espie 1237: pattern->rhs = NULL;
1238: pattern->lhs = VarGetPattern(ctxt, err, &s, delim, delim,
1239: &pattern->leftLen, NULL);
1240: pattern->lbuffer = pattern->lhs;
1241: if (pattern->lhs != NULL) {
1242: pattern->rhs = VarGetPattern(ctxt, err, &s, delim, delim,
1.10 espie 1243: &pattern->rightLen, dosubst ? pattern: NULL);
1.8 espie 1244: if (pattern->rhs != NULL) {
1.7 espie 1245: /* Check for global substitution. If 'g' after the final
1246: * delimiter, substitution is global and is marked that
1247: * way. */
1248: for (;; s++) {
1249: switch (*s) {
1250: case 'g':
1.8 espie 1251: pattern->flags |= VAR_SUB_GLOBAL;
1.7 espie 1252: continue;
1253: case '1':
1.8 espie 1254: pattern->flags |= VAR_SUB_ONE;
1.7 espie 1255: continue;
1.1 espie 1256: }
1257: break;
1258: }
1.7 espie 1259: if (*s == endc || *s == ':') {
1260: *p = s;
1.8 espie 1261: return pattern;
1.7 espie 1262: }
1263: }
1264: }
1.8 espie 1265: free_patternarg(pattern);
1.7 espie 1266: return NULL;
1267: }
1268:
1269: static void *
1.13 espie 1270: assign_get_value(const char **p, SymTable *ctxt, bool err, int endc)
1.7 espie 1271: {
1272: const char *s;
1273: int flags;
1274: VarPattern *arg;
1275:
1276: s = *p + 1;
1277: if (s[0] == '=')
1278: flags = VAR_EQUAL;
1279: else if (s[0] == '?' && s[1] == '=')
1280: flags = VAR_MAY_EQUAL;
1281: else if (s[0] == '+' && s[1] == '=')
1282: flags = VAR_ADD_EQUAL;
1283: else if (s[0] == '!' && s[1] == '=')
1284: flags = VAR_BANG_EQUAL;
1285: else
1286: return NULL;
1.1 espie 1287:
1.7 espie 1288: arg = get_value(&s, ctxt, err, endc);
1289: if (arg != NULL) {
1290: *p = s;
1291: arg->flags = flags;
1292: }
1293: return arg;
1294: }
1.1 espie 1295:
1.7 espie 1296: static void *
1.13 espie 1297: get_value(const char **p, SymTable *ctxt, bool err, int endc)
1.7 espie 1298: {
1.8 espie 1299: VarPattern *pattern;
1.7 espie 1300: const char *s;
1.1 espie 1301:
1.8 espie 1302: pattern = (VarPattern *)emalloc(sizeof(VarPattern));
1.7 espie 1303: s = *p + 1;
1.8 espie 1304: pattern->rhs = NULL;
1305: pattern->lbuffer = VarGetPattern(ctxt, err, &s, ':', endc,
1306: &pattern->leftLen, NULL);
1.7 espie 1307: if (s[-1] == endc || s[-1] == ':') {
1308: *p = s-1;
1.8 espie 1309: return pattern;
1.7 espie 1310: }
1.8 espie 1311: free_patternarg(pattern);
1.7 espie 1312: return NULL;
1313: }
1.1 espie 1314:
1.7 espie 1315: static void *
1.13 espie 1316: get_cmd(const char **p, SymTable *ctxt, bool err, int endc UNUSED)
1.7 espie 1317: {
1.8 espie 1318: VarPattern *pattern;
1.7 espie 1319: const char *s;
1.1 espie 1320:
1.8 espie 1321: pattern = (VarPattern *)emalloc(sizeof(VarPattern));
1.7 espie 1322: s = *p + 1;
1.8 espie 1323: pattern->rhs = NULL;
1324: pattern->lbuffer = VarGetPattern(ctxt, err, &s, '!', '!',
1325: &pattern->leftLen, NULL);
1.7 espie 1326: if (s[-1] == '!') {
1327: *p = s-1;
1.8 espie 1328: return pattern;
1.1 espie 1329: }
1.8 espie 1330: free_patternarg(pattern);
1.7 espie 1331: return NULL;
1332: }
1.1 espie 1333:
1.7 espie 1334: static void
1.13 espie 1335: free_patternarg(void *p)
1.7 espie 1336: {
1337: VarPattern *vp = (VarPattern *)p;
1.8 espie 1338:
1.7 espie 1339: free(vp->lbuffer);
1340: free(vp->rhs);
1.8 espie 1341: free(vp);
1.1 espie 1342: }
1343:
1.7 espie 1344: #ifndef MAKE_BOOTSTRAP
1.1 espie 1345: static char *
1.13 espie 1346: do_regex(const char *s, const struct Name *n UNUSED, void *arg)
1.7 espie 1347: {
1348: VarREPattern p2;
1349: VarPattern *p = (VarPattern *)arg;
1350: int error;
1351: char *result;
1352:
1353: error = regcomp(&p2.re, p->lhs, REG_EXTENDED);
1354: if (error) {
1355: VarREError(error, &p2.re, "RE substitution error");
1356: return var_Error;
1357: }
1358: p2.nsub = p2.re.re_nsub + 1;
1359: p2.replace = p->rhs;
1360: p2.flags = p->flags;
1361: if (p2.nsub < 1)
1362: p2.nsub = 1;
1363: if (p2.nsub > 10)
1364: p2.nsub = 10;
1365: p2.matches = emalloc(p2.nsub * sizeof(regmatch_t));
1366: result = VarModify((char *)s, VarRESubstitute, &p2);
1367: regfree(&p2.re);
1368: free(p2.matches);
1369: return result;
1370: }
1371: #endif
1372:
1373: char *
1.13 espie 1374: VarModifiers_Apply(char *str, const struct Name *name, SymTable *ctxt,
1.15 espie 1375: bool err, bool *freePtr, const char *start, int paren, size_t *lengthPtr)
1.1 espie 1376: {
1.7 espie 1377: const char *tstr;
1.9 espie 1378: bool atstart; /* Some ODE modifiers only make sense at start */
1.15 espie 1379: char endc = paren == '(' ? ')' : '}';
1.1 espie 1380:
1.7 espie 1381: tstr = start;
1382: /*
1383: * Now we need to apply any modifiers the user wants applied.
1384: * These are:
1385: * :M<pattern> words which match the given <pattern>.
1386: * <pattern> is of the standard file
1387: * wildcarding form.
1388: * :S<d><pat1><d><pat2><d>[g]
1389: * Substitute <pat2> for <pat1> in the value
1390: * :C<d><pat1><d><pat2><d>[g]
1391: * Substitute <pat2> for regex <pat1> in the value
1392: * :H Substitute the head of each word
1393: * :T Substitute the tail of each word
1394: * :E Substitute the extension (minus '.') of
1395: * each word
1396: * :R Substitute the root of each word
1397: * (pathname minus the suffix).
1398: * :lhs=rhs Like :S, but the rhs goes to the end of
1399: * the invocation.
1400: */
1401:
1.9 espie 1402: atstart = true;
1.7 espie 1403: while (*tstr != endc && *tstr != '\0') {
1404: struct modifier *mod;
1405: void *arg;
1406: char *newStr;
1407:
1408: tstr++;
1409: if (DEBUG(VAR))
1410: printf("Applying :%c to \"%s\"\n", *tstr, str);
1.2 espie 1411:
1.7 espie 1412: mod = choose_mod[*tstr];
1413: arg = NULL;
1.1 espie 1414:
1.7 espie 1415: if (mod != NULL && (!mod->atstart || atstart))
1416: arg = mod->getarg(&tstr, ctxt, err, endc);
1417: if (FEATURES(FEATURE_SYSVVARSUB) && arg == NULL) {
1418: mod = &sysv_mod;
1419: arg = mod->getarg(&tstr, ctxt, err, endc);
1420: }
1.9 espie 1421: atstart = false;
1.7 espie 1422: if (arg != NULL) {
1423: if (str != NULL || (mod->atstart && name != NULL)) {
1424: if (mod->word_apply != NULL) {
1425: newStr = VarModify(str, mod->word_apply, arg);
1426: if (mod->apply != NULL) {
1427: char *newStr2;
1428:
1429: newStr2 = mod->apply(newStr, name, arg);
1430: free(newStr);
1431: newStr = newStr2;
1432: }
1433: } else
1434: newStr = mod->apply(str, name, arg);
1435: if (*freePtr)
1436: free(str);
1437: str = newStr;
1438: if (str != var_Error)
1.9 espie 1439: *freePtr = true;
1.7 espie 1440: else
1.9 espie 1441: *freePtr = false;
1.7 espie 1442: }
1443: if (mod->freearg != NULL)
1444: mod->freearg(arg);
1445: } else {
1446: Error("Bad modifier: %s\n", tstr);
1447: /* Try skipping to end of var... */
1448: for (tstr++; *tstr != endc && *tstr != '\0';)
1449: tstr++;
1450: if (str != NULL && *freePtr)
1451: free(str);
1452: str = var_Error;
1.12 fgsch 1453: *freePtr = false;
1.7 espie 1454: break;
1455: }
1456: if (DEBUG(VAR))
1457: printf("Result is \"%s\"\n", str);
1.1 espie 1458: }
1.14 espie 1459: if (*tstr == '\0') {
1.7 espie 1460: Error("Unclosed variable specification");
1.14 espie 1461: /* make tstr point at the last char of the variable specification */
1462: tstr--;
1463: }
1.7 espie 1464:
1465: *lengthPtr += tstr - start;
1466: return str;
1.1 espie 1467: }
1.7 espie 1468:
1.1 espie 1469: char *
1.13 espie 1470: Var_GetHead(char *s)
1.1 espie 1471: {
1.7 espie 1472: return VarModify(s, VarHead, NULL);
1.1 espie 1473: }
1474:
1475: char *
1.13 espie 1476: Var_GetTail(char *s)
1.1 espie 1477: {
1.7 espie 1478: return VarModify(s, VarTail, NULL);
1.1 espie 1479: }
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