tradcpp K&R-style C preprocessor: directive.c annotate

annotate directive.c @ 128:1cda505ddc78

Don't expand macros within character constants.

author	David A. Holland
date	Fri, 14 Jun 2013 20:59:24 -0400
parents	a0a86380456e
children	a2c2fe8dbea3 d6e6b3940780

rev	line source
30 76c114899f63 copyrights David A. Holland parents: 18 diff changeset	1 /*-
99 60184aa42604 add 2013 to copyrights where it seems warranted David A. Holland parents: 90 diff changeset	2 * Copyright (c) 2010, 2013 The NetBSD Foundation, Inc.
30 76c114899f63 copyrights David A. Holland parents: 18 diff changeset	3 * All rights reserved.
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	4 *
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	5 * This code is derived from software contributed to The NetBSD Foundation
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	6 * by David A. Holland.
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	7 *
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	8 * Redistribution and use in source and binary forms, with or without
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	9 * modification, are permitted provided that the following conditions
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	10 * are met:
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	11 * 1. Redistributions of source code must retain the above copyright
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	12 * notice, this list of conditions and the following disclaimer.
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	13 * 2. Redistributions in binary form must reproduce the above copyright
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	14 * notice, this list of conditions and the following disclaimer in the
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	15 * documentation and/or other materials provided with the distribution.
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	16 *
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	27 * POSSIBILITY OF SUCH DAMAGE.
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	28 */
76c114899f63 copyrights David A. Holland parents: 18 diff changeset	29
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	30 #include <assert.h>
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	31 #include <stdbool.h>
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	32 #include <stdlib.h>
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	33 #include <string.h>
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	34
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	35 #include "utils.h"
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	36 #include "mode.h"
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	37 #include "place.h"
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	38 #include "files.h"
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	39 #include "directive.h"
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	40 #include "macro.h"
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	41 #include "eval.h"
49 8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	42 #include "output.h"
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	43
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	44 struct ifstate {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	45 struct ifstate *prev;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	46 struct place startplace;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	47 bool curtrue;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	48 bool evertrue;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	49 bool seenelse;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	50 };
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	51
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	52 static struct ifstate *ifstate;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	53
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	54 ////////////////////////////////////////////////////////////
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	55 // common parsing bits
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	56
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	57 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	58 void
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	59 uncomment(char *buf)
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	60 {
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	61 char s, t, *u = NULL;
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	62 bool incomment = false;
81 27c9aafcaca1 Don't recognize comments within double-quote strings. David A. Holland parents: 77 diff changeset	63 bool inesc = false;
27c9aafcaca1 Don't recognize comments within double-quote strings. David A. Holland parents: 77 diff changeset	64 bool inquote = false;
128 1cda505ddc78 Don't expand macros within character constants. David A. Holland parents: 127 diff changeset	65 char quote = '\0';
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	66
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	67 for (s = t = buf; *s; s++) {
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	68 if (incomment) {
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	69 if (s[0] == '*' && s[1] == '/') {
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	70 s++;
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	71 incomment = false;
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	72 }
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	73 } else {
81 27c9aafcaca1 Don't recognize comments within double-quote strings. David A. Holland parents: 77 diff changeset	74 if (!inquote && s[0] == '/' && s[1] == '*') {
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	75 incomment = true;
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	76 } else {
81 27c9aafcaca1 Don't recognize comments within double-quote strings. David A. Holland parents: 77 diff changeset	77 if (inesc) {
27c9aafcaca1 Don't recognize comments within double-quote strings. David A. Holland parents: 77 diff changeset	78 inesc = false;
27c9aafcaca1 Don't recognize comments within double-quote strings. David A. Holland parents: 77 diff changeset	79 } else if (s[0] == '\\') {
27c9aafcaca1 Don't recognize comments within double-quote strings. David A. Holland parents: 77 diff changeset	80 inesc = true;
128 1cda505ddc78 Don't expand macros within character constants. David A. Holland parents: 127 diff changeset	81 } else if (!inquote &&
1cda505ddc78 Don't expand macros within character constants. David A. Holland parents: 127 diff changeset	82 (s[0] == '"' \|\| s[0] == '\'')) {
1cda505ddc78 Don't expand macros within character constants. David A. Holland parents: 127 diff changeset	83 inquote = true;
1cda505ddc78 Don't expand macros within character constants. David A. Holland parents: 127 diff changeset	84 quote = s[0];
1cda505ddc78 Don't expand macros within character constants. David A. Holland parents: 127 diff changeset	85 } else if (inquote && s[0] == quote) {
1cda505ddc78 Don't expand macros within character constants. David A. Holland parents: 127 diff changeset	86 inquote = false;
81 27c9aafcaca1 Don't recognize comments within double-quote strings. David A. Holland parents: 77 diff changeset	87 }
27c9aafcaca1 Don't recognize comments within double-quote strings. David A. Holland parents: 77 diff changeset	88
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	89 if (t != s) {
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	90 t = s;
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	91 }
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	92 if (!strchr(ws, *t)) {
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	93 u = t;
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	94 }
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	95 t++;
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	96 }
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	97 }
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	98 }
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	99 if (u) {
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	100 /* end string after last non-whitespace char */
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	101 u[1] = '\0';
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	102 } else {
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	103 *t = '\0';
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	104 }
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	105 }
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	106
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	107 static
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	108 void
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	109 oneword(const char what, struct place p2, char *line)
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	110 {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	111 size_t pos;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	112
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	113 pos = strcspn(line, ws);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	114 if (line[pos] != '\0') {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	115 p2->column += pos;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	116 complain(p2, "Garbage after %s argument", what);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	117 complain_fail();
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	118 line[pos] = '\0';
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	119 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	120 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	121
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	122 ////////////////////////////////////////////////////////////
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	123 // if handling
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	124
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	125 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	126 struct ifstate *
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	127 ifstate_create(struct ifstate prev, struct place p, bool startstate)
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	128 {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	129 struct ifstate *is;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	130
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	131 is = domalloc(sizeof(*is));
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	132 is->prev = prev;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	133 if (p != NULL) {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	134 is->startplace = *p;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	135 } else {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	136 place_setbuiltin(&is->startplace, 1);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	137 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	138 is->curtrue = startstate;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	139 is->evertrue = is->curtrue;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	140 is->seenelse = false;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	141 return is;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	142 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	143
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	144 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	145 void
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	146 ifstate_destroy(struct ifstate *is)
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	147 {
39 337110e7240a Pass the size to free; it makes debug checking easier. David A. Holland parents: 38 diff changeset	148 dofree(is, sizeof(*is));
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	149 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	150
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	151 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	152 void
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	153 ifstate_push(struct place *p, bool startstate)
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	154 {
72 b1d0f10e8d36 handle nested ifs correctly David A. Holland parents: 66 diff changeset	155 struct ifstate *newstate;
b1d0f10e8d36 handle nested ifs correctly David A. Holland parents: 66 diff changeset	156
b1d0f10e8d36 handle nested ifs correctly David A. Holland parents: 66 diff changeset	157 newstate = ifstate_create(ifstate, p, startstate);
b1d0f10e8d36 handle nested ifs correctly David A. Holland parents: 66 diff changeset	158 if (!ifstate->curtrue) {
b1d0f10e8d36 handle nested ifs correctly David A. Holland parents: 66 diff changeset	159 newstate->curtrue = false;
b1d0f10e8d36 handle nested ifs correctly David A. Holland parents: 66 diff changeset	160 newstate->evertrue = true;
b1d0f10e8d36 handle nested ifs correctly David A. Holland parents: 66 diff changeset	161 }
b1d0f10e8d36 handle nested ifs correctly David A. Holland parents: 66 diff changeset	162 ifstate = newstate;
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	163 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	164
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	165 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	166 void
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	167 ifstate_pop(void)
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	168 {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	169 struct ifstate *is;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	170
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	171 is = ifstate;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	172 ifstate = ifstate->prev;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	173 ifstate_destroy(is);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	174 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	175
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	176 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	177 void
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	178 d_if(struct place p, struct place p2, char *line)
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	179 {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	180 char *expr;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	181 bool val;
16 9dda765ee85c expression evaluator David A. Holland parents: 15 diff changeset	182 struct place p3 = *p2;
82 05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	183 size_t oldlen;
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	184
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	185 expr = macroexpand(p2, line, strlen(line), true);
82 05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	186
05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	187 oldlen = strlen(expr);
05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	188 uncomment(expr);
05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	189 /* trim to fit, so the malloc debugging won't complain */
05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	190 expr = dorealloc(expr, oldlen + 1, strlen(expr) + 1);
05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	191
127 a0a86380456e fix for #if handling: David A. Holland parents: 109 diff changeset	192 if (ifstate->curtrue) {
a0a86380456e fix for #if handling: David A. Holland parents: 109 diff changeset	193 val = eval(&p3, expr);
a0a86380456e fix for #if handling: David A. Holland parents: 109 diff changeset	194 } else {
a0a86380456e fix for #if handling: David A. Holland parents: 109 diff changeset	195 val = 0;
a0a86380456e fix for #if handling: David A. Holland parents: 109 diff changeset	196 }
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	197 ifstate_push(p, val);
39 337110e7240a Pass the size to free; it makes debug checking easier. David A. Holland parents: 38 diff changeset	198 dostrfree(expr);
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	199 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	200
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	201 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	202 void
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	203 d_ifdef(struct place p, struct place p2, char *line)
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	204 {
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	205 uncomment(line);
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	206 oneword("#ifdef", p2, line);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	207 ifstate_push(p, macro_isdefined(line));
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	208 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	209
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	210 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	211 void
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	212 d_ifndef(struct place p, struct place p2, char *line)
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	213 {
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	214 uncomment(line);
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	215 oneword("#ifndef", p2, line);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	216 ifstate_push(p, !macro_isdefined(line));
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	217 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	218
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	219 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	220 void
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	221 d_elif(struct place p, struct place p2, char *line)
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	222 {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	223 char *expr;
16 9dda765ee85c expression evaluator David A. Holland parents: 15 diff changeset	224 struct place p3 = *p2;
82 05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	225 size_t oldlen;
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	226
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	227 if (ifstate->seenelse) {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	228 complain(p, "#elif after #else");
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	229 complain_fail();
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	230 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	231
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	232 if (ifstate->evertrue) {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	233 ifstate->curtrue = false;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	234 } else {
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	235 expr = macroexpand(p2, line, strlen(line), true);
82 05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	236
05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	237 oldlen = strlen(expr);
05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	238 uncomment(expr);
05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	239 /* trim to fit, so the malloc debugging won't complain */
05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	240 expr = dorealloc(expr, oldlen + 1, strlen(expr) + 1);
05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	241
16 9dda765ee85c expression evaluator David A. Holland parents: 15 diff changeset	242 ifstate->curtrue = eval(&p3, expr);
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	243 ifstate->evertrue = ifstate->curtrue;
39 337110e7240a Pass the size to free; it makes debug checking easier. David A. Holland parents: 38 diff changeset	244 dostrfree(expr);
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	245 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	246 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	247
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	248 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	249 void
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	250 d_else(struct place p, struct place p2, char *line)
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	251 {
103 343af355df1b Pass -Wunused. David A. Holland parents: 99 diff changeset	252 (void)p2;
343af355df1b Pass -Wunused. David A. Holland parents: 99 diff changeset	253 (void)line;
343af355df1b Pass -Wunused. David A. Holland parents: 99 diff changeset	254
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	255 if (ifstate->seenelse) {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	256 complain(p, "Multiple #else directives in one conditional");
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	257 complain_fail();
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	258 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	259
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	260 ifstate->curtrue = !ifstate->evertrue;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	261 ifstate->evertrue = true;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	262 ifstate->seenelse = true;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	263 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	264
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	265 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	266 void
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	267 d_endif(struct place p, struct place p2, char *line)
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	268 {
103 343af355df1b Pass -Wunused. David A. Holland parents: 99 diff changeset	269 (void)p2;
343af355df1b Pass -Wunused. David A. Holland parents: 99 diff changeset	270 (void)line;
343af355df1b Pass -Wunused. David A. Holland parents: 99 diff changeset	271
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	272 if (ifstate->prev == NULL) {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	273 complain(p, "Unmatched #endif");
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	274 complain_fail();
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	275 } else {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	276 ifstate_pop();
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	277 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	278 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	279
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	280 ////////////////////////////////////////////////////////////
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	281 // macros
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	282
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	283 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	284 void
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	285 d_define(struct place p, struct place p2, char *line)
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	286 {
18 c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	287 size_t pos, argpos;
c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	288 struct place p3, p4;
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	289
103 343af355df1b Pass -Wunused. David A. Holland parents: 99 diff changeset	290 (void)p;
343af355df1b Pass -Wunused. David A. Holland parents: 99 diff changeset	291
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	292 /*
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	293 * line may be:
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	294 * macro expansion
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	295 * macro(arg, arg, ...) expansion
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	296 */
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	297
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	298 pos = strcspn(line, " \t\f\v(");
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	299 if (line[pos] == '(') {
18 c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	300 line[pos++] = '\0';
c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	301 argpos = pos;
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	302 pos = pos + strcspn(line+pos, "()");
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	303 if (line[pos] == '(') {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	304 p2->column += pos;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	305 complain(p2, "Left parenthesis in macro parameters");
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	306 complain_fail();
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	307 return;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	308 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	309 if (line[pos] != ')') {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	310 p2->column += pos;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	311 complain(p2, "Unclosed macro parameter list");
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	312 complain_fail();
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	313 return;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	314 }
18 c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	315 line[pos++] = '\0';
36 a489cc223483 Don't demand space after the macro argument parenthesis. David A. Holland parents: 30 diff changeset	316 #if 0
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	317 if (!strchr(ws, line[pos])) {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	318 p2->column += pos;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	319 complain(p2, "Trash after macro parameter list");
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	320 complain_fail();
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	321 return;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	322 }
36 a489cc223483 Don't demand space after the macro argument parenthesis. David A. Holland parents: 30 diff changeset	323 #endif
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	324 } else if (line[pos] == '\0') {
18 c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	325 argpos = 0;
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	326 } else {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	327 line[pos++] = '\0';
18 c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	328 argpos = 0;
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	329 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	330
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	331 pos += strspn(line+pos, ws);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	332
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	333 p3 = *p2;
18 c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	334 p3.column += argpos;
c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	335
c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	336 p4 = *p2;
c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	337 p4.column += pos;
c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	338
c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	339 if (argpos) {
c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	340 macro_define_params(p2, line, &p3,
c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	341 line + argpos, &p4,
c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	342 line + pos);
c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	343 } else {
c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	344 macro_define_plain(p2, line, &p4, line + pos);
c08a947d8f30 deal with macro parameters David A. Holland parents: 16 diff changeset	345 }
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	346 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	347
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	348 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	349 void
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	350 d_undef(struct place p, struct place p2, char *line)
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	351 {
103 343af355df1b Pass -Wunused. David A. Holland parents: 99 diff changeset	352 (void)p;
343af355df1b Pass -Wunused. David A. Holland parents: 99 diff changeset	353
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	354 uncomment(line);
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	355 oneword("#undef", p2, line);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	356 macro_undef(line);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	357 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	358
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	359 ////////////////////////////////////////////////////////////
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	360 // includes
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	361
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	362 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	363 bool
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	364 tryinclude(struct place p, char line)
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	365 {
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	366 size_t len;
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	367
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	368 len = strlen(line);
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	369 if (len > 2 && line[0] == '"' && line[len-1] == '"') {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	370 line[len-1] = '\0';
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	371 file_readquote(p, line+1);
62 90c6052410ce Don't truncate the candidate include path strings. David A. Holland parents: 49 diff changeset	372 line[len-1] = '"';
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	373 return true;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	374 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	375 if (len > 2 && line[0] == '<' && line[len-1] == '>') {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	376 line[len-1] = '\0';
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	377 file_readbracket(p, line+1);
62 90c6052410ce Don't truncate the candidate include path strings. David A. Holland parents: 49 diff changeset	378 line[len-1] = '>';
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	379 return true;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	380 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	381 return false;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	382 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	383
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	384 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	385 void
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	386 d_include(struct place p, struct place p2, char *line)
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	387 {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	388 char *text;
82 05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	389 size_t oldlen;
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	390
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	391 uncomment(line);
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	392 if (tryinclude(p, line)) {
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	393 return;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	394 }
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	395 text = macroexpand(p2, line, strlen(line), false);
82 05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	396
05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	397 oldlen = strlen(text);
05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	398 uncomment(text);
05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	399 /* trim to fit, so the malloc debugging won't complain */
05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	400 text = dorealloc(text, oldlen + 1, strlen(text) + 1);
05a94332f08b In #if/#elif, prune comments after macro expansion. David A. Holland parents: 81 diff changeset	401
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	402 if (tryinclude(p, text)) {
39 337110e7240a Pass the size to free; it makes debug checking easier. David A. Holland parents: 38 diff changeset	403 dostrfree(text);
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	404 return;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	405 }
90 594495750d84 If we get a malformed #include, print it. David A. Holland parents: 83 diff changeset	406 complain(p, "Illegal #include directive");
594495750d84 If we get a malformed #include, print it. David A. Holland parents: 83 diff changeset	407 complain(p, "Before macro expansion: #include %s", line);
594495750d84 If we get a malformed #include, print it. David A. Holland parents: 83 diff changeset	408 complain(p, "After macro expansion: #include %s", text);
39 337110e7240a Pass the size to free; it makes debug checking easier. David A. Holland parents: 38 diff changeset	409 dostrfree(text);
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	410 complain_fail();
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	411 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	412
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	413 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	414 void
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	415 d_line(struct place p, struct place p2, char *line)
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	416 {
103 343af355df1b Pass -Wunused. David A. Holland parents: 99 diff changeset	417 (void)p2;
343af355df1b Pass -Wunused. David A. Holland parents: 99 diff changeset	418 (void)line;
343af355df1b Pass -Wunused. David A. Holland parents: 99 diff changeset	419
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	420 /* XXX */
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	421 complain(p, "Sorry, no #line yet");
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	422 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	423
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	424 ////////////////////////////////////////////////////////////
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	425 // messages
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	426
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	427 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	428 void
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	429 d_warning(struct place p, struct place p2, char *line)
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	430 {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	431 char *msg;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	432
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	433 msg = macroexpand(p2, line, strlen(line), false);
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	434 complain(p, "#warning: %s", msg);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	435 if (mode.werror) {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	436 complain_fail();
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	437 }
39 337110e7240a Pass the size to free; it makes debug checking easier. David A. Holland parents: 38 diff changeset	438 dostrfree(msg);
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	439 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	440
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	441 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	442 void
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	443 d_error(struct place p, struct place p2, char *line)
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	444 {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	445 char *msg;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	446
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	447 msg = macroexpand(p2, line, strlen(line), false);
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	448 complain(p, "#error: %s", msg);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	449 complain_fail();
39 337110e7240a Pass the size to free; it makes debug checking easier. David A. Holland parents: 38 diff changeset	450 dostrfree(msg);
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	451 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	452
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	453 ////////////////////////////////////////////////////////////
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	454 // other
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	455
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	456 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	457 void
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	458 d_pragma(struct place p, struct place p2, char *line)
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	459 {
103 343af355df1b Pass -Wunused. David A. Holland parents: 99 diff changeset	460 (void)p2;
343af355df1b Pass -Wunused. David A. Holland parents: 99 diff changeset	461
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	462 complain(p, "#pragma %s", line);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	463 complain_fail();
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	464 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	465
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	466 ////////////////////////////////////////////////////////////
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	467 // directive table
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	468
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	469 static const struct {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	470 const char *name;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	471 bool ifskip;
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	472 void (func)(struct place , struct place , char line);
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	473 } directives[] = {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	474 { "define", true, d_define },
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	475 { "elif", false, d_elif },
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	476 { "else", false, d_else },
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	477 { "endif", false, d_endif },
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	478 { "error", true, d_error },
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	479 { "if", false, d_if },
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	480 { "ifdef", false, d_ifdef },
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	481 { "ifndef", false, d_ifndef },
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	482 { "include", true, d_include },
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	483 { "line", true, d_line },
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	484 { "pragma", true, d_pragma },
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	485 { "undef", true, d_undef },
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	486 { "warning", true, d_warning },
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	487 };
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	488 static const unsigned numdirectives = HOWMANY(directives);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	489
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	490 static
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	491 void
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	492 directive_gotdirective(struct place p, char line)
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	493 {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	494 struct place p2;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	495 size_t len, skip;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	496 unsigned i;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	497
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	498 p2 = *p;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	499 for (i=0; i<numdirectives; i++) {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	500 len = strlen(directives[i].name);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	501 if (!strncmp(line, directives[i].name, len) &&
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	502 strchr(ws, line[len])) {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	503 if (directives[i].ifskip && !ifstate->curtrue) {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	504 return;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	505 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	506 skip = len + strspn(line+len, ws);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	507 p2.column += skip;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	508 line += skip;
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	509
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	510 len = strlen(line);
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	511 len = notrailingws(line, len);
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	512 if (len < strlen(line)) {
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	513 line[len] = '\0';
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	514 }
f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	515 directives[i].func(p, &p2, line);
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	516 return;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	517 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	518 }
83 3e505c16b0b0 Accept # by itself, including with a comment after it. David A. Holland parents: 82 diff changeset	519 /* ugh. allow # by itself, including with a comment after it */
3e505c16b0b0 Accept # by itself, including with a comment after it. David A. Holland parents: 82 diff changeset	520 uncomment(line);
3e505c16b0b0 Accept # by itself, including with a comment after it. David A. Holland parents: 82 diff changeset	521 if (line[0] == '\0') {
3e505c16b0b0 Accept # by itself, including with a comment after it. David A. Holland parents: 82 diff changeset	522 return;
3e505c16b0b0 Accept # by itself, including with a comment after it. David A. Holland parents: 82 diff changeset	523 }
3e505c16b0b0 Accept # by itself, including with a comment after it. David A. Holland parents: 82 diff changeset	524
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	525 skip = strcspn(line, ws);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	526 complain(p, "Unknown directive #%.*s", (int)skip, line);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	527 complain_fail();
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	528 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	529
49 8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	530 /*
77 123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	531 * Check for nested comment delimiters in LINE.
49 8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	532 */
8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	533 static
8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	534 size_t
77 123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	535 directive_scancomments(const struct place p, char line, size_t len)
49 8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	536 {
8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	537 size_t pos;
8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	538 bool incomment;
77 123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	539 struct place p2;
49 8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	540
77 123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	541 p2 = *p;
123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	542 incomment = 0;
49 8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	543 for (pos = 0; pos+1 < len; pos++) {
8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	544 if (line[pos] == '/' && line[pos+1] == '*') {
8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	545 if (incomment) {
77 123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	546 complain(&p2, "Warning: %c%c within comment",
123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	547 '/', '*');
123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	548 if (mode.werror) {
123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	549 complain_failed();
123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	550 }
49 8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	551 } else {
8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	552 incomment = true;
8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	553 }
109 4483a14ee101 Make -Wcomment work again David A. Holland parents: 103 diff changeset	554 pos++;
49 8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	555 } else if (line[pos] == '*' && line[pos+1] == '/') {
8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	556 if (incomment) {
8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	557 incomment = false;
8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	558 } else {
8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	559 /* stray end-comment; should we care? */
8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	560 }
109 4483a14ee101 Make -Wcomment work again David A. Holland parents: 103 diff changeset	561 pos++;
49 8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	562 }
77 123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	563 if (line[pos] == '\n') {
123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	564 p2.line++;
123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	565 p2.column = 0;
123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	566 } else {
123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	567 p2.column++;
123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	568 }
49 8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	569 }
8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	570
77 123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	571 /* multiline comments are supposed to arrive in a single buffer */
123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	572 assert(!incomment);
49 8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	573 return len;
8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	574 }
8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	575
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	576 void
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	577 directive_gotline(struct place p, char line, size_t len)
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	578 {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	579 size_t skip;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	580
77 123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	581 if (warns.nestcomment) {
123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	582 directive_scancomments(p, line, len);
49 8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	583 }
8a204d153398 Intercept multiline comments earlier. Leave same-line comments alone. David A. Holland parents: 39 diff changeset	584
66 f8507e5ed84c Recognize directive lines only when the # is exactly in column 0. David A. Holland parents: 64 diff changeset	585 /* check if we have a directive line (# exactly in column 0) */
77 123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	586 if (line[0] == '#') {
66 f8507e5ed84c Recognize directive lines only when the # is exactly in column 0. David A. Holland parents: 64 diff changeset	587 skip = 1 + strspn(line + 1, ws);
77 123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	588 assert(skip <= len);
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	589 p->column += skip;
64 f50b4ea6cbfe Prune single-line comments from (most) directive lines. David A. Holland parents: 62 diff changeset	590 assert(line[len] == '\0');
77 123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	591 directive_gotdirective(p, line+skip /, length = len-skip /);
123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	592 p->column += len-skip;
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	593 } else if (ifstate->curtrue) {
77 123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	594 macro_sendline(p, line, len);
123168887da8 Clean out old not-really-working nested comment handling. David A. Holland parents: 72 diff changeset	595 p->column += len;
15 f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	596 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	597 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	598
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	599 void
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	600 directive_goteof(struct place *p)
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	601 {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	602 while (ifstate->prev != NULL) {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	603 complain(p, "Missing #endif");
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	604 complain(&ifstate->startplace, "...opened at this point");
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	605 complain_failed();
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	606 ifstate_pop();
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	607 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	608 macro_sendeof(p);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	609 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	610
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	611 ////////////////////////////////////////////////////////////
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	612 // module initialization
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	613
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	614 void
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	615 directive_init(void)
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	616 {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	617 ifstate = ifstate_create(NULL, NULL, true);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	618 }
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	619
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	620 void
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	621 directive_cleanup(void)
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	622 {
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	623 assert(ifstate->prev == NULL);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	624 ifstate_destroy(ifstate);
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	625 ifstate = NULL;
f6177d3ed5c2 handle directives David A. Holland parents: diff changeset	626 }

Mercurial > ~dholland > hg > tradcpp > index.cgi

annotate directive.c @ 128:1cda505ddc78