annotate directive.c @ 178:0d5b9651b240

Merge Joerg's changes into upstream. (now that they've been thrashed out a bit, include CHANGES entries, etc.)
author David A. Holland
date Fri, 12 Jun 2015 03:05:49 -0400
parents a2f047301c15
children 4c3375895c6e
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1 /*-
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60184aa42604 add 2013 to copyrights where it seems warranted
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2 * Copyright (c) 2010, 2013 The NetBSD Foundation, Inc.
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3 * All rights reserved.
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4 *
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5 * This code is derived from software contributed to The NetBSD Foundation
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6 * by David A. Holland.
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7 *
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8 * Redistribution and use in source and binary forms, with or without
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9 * modification, are permitted provided that the following conditions
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10 * are met:
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11 * 1. Redistributions of source code must retain the above copyright
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12 * notice, this list of conditions and the following disclaimer.
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13 * 2. Redistributions in binary form must reproduce the above copyright
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14 * notice, this list of conditions and the following disclaimer in the
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15 * documentation and/or other materials provided with the distribution.
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16 *
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17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 * POSSIBILITY OF SUCH DAMAGE.
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28 */
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29
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30 #include <assert.h>
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31 #include <stdbool.h>
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32 #include <stdlib.h>
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33 #include <string.h>
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34 #include <limits.h>
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35 #include <errno.h>
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36
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37 #include "utils.h"
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38 #include "mode.h"
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39 #include "place.h"
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40 #include "files.h"
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41 #include "directive.h"
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42 #include "macro.h"
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43 #include "eval.h"
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44 #include "output.h"
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45
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46 struct ifstate {
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47 struct ifstate *prev;
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48 struct place startplace;
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49 bool curtrue;
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50 bool evertrue;
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51 bool seenelse;
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52 };
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53
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54 static struct ifstate *ifstate;
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55
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56 ////////////////////////////////////////////////////////////
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57 // common parsing bits
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58
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59 static
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60 void
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61 uncomment(char *buf)
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62 {
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63 char *s, *t, *u = NULL;
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64 bool incomment = false;
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65 bool inesc = false;
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66 bool inquote = false;
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67 char quote = '\0';
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68
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69 for (s = t = buf; *s; s++) {
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70 if (incomment) {
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71 if (s[0] == '*' && s[1] == '/') {
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72 s++;
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73 incomment = false;
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74 }
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75 } else {
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76 if (!inquote && s[0] == '/' && s[1] == '*') {
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77 incomment = true;
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78 } else {
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79 if (inesc) {
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80 inesc = false;
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81 } else if (s[0] == '\\') {
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82 inesc = true;
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83 } else if (!inquote &&
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84 (s[0] == '"' || s[0] == '\'')) {
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85 inquote = true;
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86 quote = s[0];
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87 } else if (inquote && s[0] == quote) {
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88 inquote = false;
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89 }
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90
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91 if (t != s) {
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92 *t = *s;
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93 }
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94 if (!strchr(ws, *t)) {
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95 u = t;
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96 }
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97 t++;
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98 }
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99 }
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100 }
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101 if (u) {
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102 /* end string after last non-whitespace char */
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103 u[1] = '\0';
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104 } else {
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105 *t = '\0';
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106 }
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107 }
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108
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109 static
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110 void
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111 oneword(const char *what, struct place *p2, char *line)
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112 {
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113 size_t pos;
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114
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115 pos = strcspn(line, ws);
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116 if (line[pos] != '\0') {
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117 p2->column += pos;
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118 complain(p2, "Garbage after %s argument", what);
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119 complain_fail();
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120 line[pos] = '\0';
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121 }
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122 }
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123
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124 ////////////////////////////////////////////////////////////
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125 // if handling
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126
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127 static
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128 struct ifstate *
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129 ifstate_create(struct ifstate *prev, struct place *p, bool startstate)
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130 {
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131 struct ifstate *is;
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132
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133 is = domalloc(sizeof(*is));
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134 is->prev = prev;
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135 if (p != NULL) {
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136 is->startplace = *p;
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137 } else {
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138 place_setbuiltin(&is->startplace, 1);
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139 }
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140 is->curtrue = startstate;
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141 is->evertrue = is->curtrue;
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142 is->seenelse = false;
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143 return is;
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144 }
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145
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146 static
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147 void
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148 ifstate_destroy(struct ifstate *is)
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149 {
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150 dofree(is, sizeof(*is));
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151 }
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152
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153 static
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154 void
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155 ifstate_push(struct place *p, bool startstate)
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156 {
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157 struct ifstate *newstate;
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158
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159 newstate = ifstate_create(ifstate, p, startstate);
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160 if (!ifstate->curtrue) {
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161 newstate->curtrue = false;
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162 newstate->evertrue = true;
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163 }
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164 ifstate = newstate;
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165 }
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166
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167 static
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168 void
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169 ifstate_pop(void)
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170 {
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171 struct ifstate *is;
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172
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173 is = ifstate;
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174 ifstate = ifstate->prev;
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175 ifstate_destroy(is);
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176 }
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177
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178 static
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179 void
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180 d_if(struct lineplace *lp, struct place *p2, char *line)
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181 {
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182 char *expr;
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183 bool val;
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184 struct place p3 = *p2;
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185 size_t oldlen;
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186
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187 expr = macroexpand(p2, line, strlen(line), true);
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188
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189 oldlen = strlen(expr);
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190 uncomment(expr);
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191 /* trim to fit, so the malloc debugging won't complain */
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192 expr = dorealloc(expr, oldlen + 1, strlen(expr) + 1);
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193
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194 if (ifstate->curtrue) {
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195 val = eval(&p3, expr);
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196 } else {
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197 val = 0;
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198 }
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199 ifstate_push(&lp->current, val);
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200 dostrfree(expr);
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201 }
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202
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203 static
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204 void
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205 d_ifdef(struct lineplace *lp, struct place *p2, char *line)
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206 {
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207 uncomment(line);
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208 oneword("#ifdef", p2, line);
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209 ifstate_push(&lp->current, macro_isdefined(line));
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210 }
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211
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212 static
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213 void
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214 d_ifndef(struct lineplace *lp, struct place *p2, char *line)
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215 {
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216 uncomment(line);
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217 oneword("#ifndef", p2, line);
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218 ifstate_push(&lp->current, !macro_isdefined(line));
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219 }
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220
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221 static
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222 void
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223 d_elif(struct lineplace *lp, struct place *p2, char *line)
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224 {
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225 char *expr;
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226 struct place p3 = *p2;
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227 size_t oldlen;
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228
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229 if (ifstate->seenelse) {
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230 complain(&lp->current, "#elif after #else");
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231 complain_fail();
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232 }
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233
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234 if (ifstate->evertrue) {
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235 ifstate->curtrue = false;
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236 } else {
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237 expr = macroexpand(p2, line, strlen(line), true);
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238
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239 oldlen = strlen(expr);
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240 uncomment(expr);
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241 /* trim to fit, so the malloc debugging won't complain */
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242 expr = dorealloc(expr, oldlen + 1, strlen(expr) + 1);
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243
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244 ifstate->curtrue = eval(&p3, expr);
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245 ifstate->evertrue = ifstate->curtrue;
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246 dostrfree(expr);
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247 }
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248 }
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249
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250 static
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251 void
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252 d_else(struct lineplace *lp, struct place *p2, char *line)
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253 {
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254 (void)p2;
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255 (void)line;
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256
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257 if (ifstate->seenelse) {
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258 complain(&lp->current,
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259 "Multiple #else directives in one conditional");
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260 complain_fail();
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261 }
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262
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263 ifstate->curtrue = !ifstate->evertrue;
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264 ifstate->evertrue = true;
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265 ifstate->seenelse = true;
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266 }
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267
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268 static
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269 void
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270 d_endif(struct lineplace *lp, struct place *p2, char *line)
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271 {
103
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272 (void)p2;
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273 (void)line;
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274
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275 if (ifstate->prev == NULL) {
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276 complain(&lp->current, "Unmatched #endif");
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277 complain_fail();
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278 } else {
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279 ifstate_pop();
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280 }
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281 }
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282
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283 ////////////////////////////////////////////////////////////
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284 // macros
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285
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286 static
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287 void
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288 d_define(struct lineplace *lp, struct place *p2, char *line)
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289 {
18
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290 size_t pos, argpos;
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291 struct place p3, p4;
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292
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293 (void)lp;
103
343af355df1b Pass -Wunused.
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294
15
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295 /*
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296 * line may be:
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297 * macro expansion
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298 * macro(arg, arg, ...) expansion
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299 */
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300
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301 pos = strcspn(line, " \t\f\v(");
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302 if (line[pos] == '(') {
18
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303 line[pos++] = '\0';
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304 argpos = pos;
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305 pos = pos + strcspn(line+pos, "()");
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306 if (line[pos] == '(') {
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307 p2->column += pos;
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308 complain(p2, "Left parenthesis in macro parameters");
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309 complain_fail();
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310 return;
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311 }
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312 if (line[pos] != ')') {
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313 p2->column += pos;
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314 complain(p2, "Unclosed macro parameter list");
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315 complain_fail();
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316 return;
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317 }
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318 line[pos++] = '\0';
36
a489cc223483 Don't demand space after the macro argument parenthesis.
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319 #if 0
15
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320 if (!strchr(ws, line[pos])) {
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321 p2->column += pos;
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322 complain(p2, "Trash after macro parameter list");
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323 complain_fail();
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324 return;
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325 }
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326 #endif
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327 } else if (line[pos] == '\0') {
18
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diff changeset
328 argpos = 0;
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329 } else {
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330 line[pos++] = '\0';
18
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331 argpos = 0;
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332 }
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333
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334 pos += strspn(line+pos, ws);
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335
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336 p3 = *p2;
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337 p3.column += argpos;
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diff changeset
338
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339 p4 = *p2;
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340 p4.column += pos;
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341
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342 if (argpos) {
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343 macro_define_params(p2, line, &p3,
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344 line + argpos, &p4,
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345 line + pos);
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346 } else {
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347 macro_define_plain(p2, line, &p4, line + pos);
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348 }
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349 }
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350
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351 static
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352 void
154
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353 d_undef(struct lineplace *lp, struct place *p2, char *line)
15
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354 {
154
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diff changeset
355 (void)lp;
103
343af355df1b Pass -Wunused.
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356
64
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
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357 uncomment(line);
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358 oneword("#undef", p2, line);
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359 macro_undef(line);
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360 }
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361
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362 ////////////////////////////////////////////////////////////
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363 // includes
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364
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365 static
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366 bool
64
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
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367 tryinclude(struct place *p, char *line)
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368 {
64
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
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369 size_t len;
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diff changeset
370
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
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371 len = strlen(line);
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372 if (len > 2 && line[0] == '"' && line[len-1] == '"') {
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373 line[len-1] = '\0';
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374 file_readquote(p, line+1);
62
90c6052410ce Don't truncate the candidate include path strings.
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diff changeset
375 line[len-1] = '"';
15
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376 return true;
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377 }
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378 if (len > 2 && line[0] == '<' && line[len-1] == '>') {
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379 line[len-1] = '\0';
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380 file_readbracket(p, line+1);
62
90c6052410ce Don't truncate the candidate include path strings.
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diff changeset
381 line[len-1] = '>';
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382 return true;
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383 }
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384 return false;
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385 }
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386
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387 static
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388 void
154
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389 d_include(struct lineplace *lp, struct place *p2, char *line)
15
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390 {
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391 char *text;
82
05a94332f08b In #if/#elif, prune comments *after* macro expansion.
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diff changeset
392 size_t oldlen;
15
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393
64
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
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394 uncomment(line);
154
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diff changeset
395 if (tryinclude(&lp->current, line)) {
15
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396 return;
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397 }
64
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
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parents: 62
diff changeset
398 text = macroexpand(p2, line, strlen(line), false);
82
05a94332f08b In #if/#elif, prune comments *after* macro expansion.
David A. Holland
parents: 81
diff changeset
399
05a94332f08b In #if/#elif, prune comments *after* macro expansion.
David A. Holland
parents: 81
diff changeset
400 oldlen = strlen(text);
05a94332f08b In #if/#elif, prune comments *after* macro expansion.
David A. Holland
parents: 81
diff changeset
401 uncomment(text);
05a94332f08b In #if/#elif, prune comments *after* macro expansion.
David A. Holland
parents: 81
diff changeset
402 /* 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
403 text = dorealloc(text, oldlen + 1, strlen(text) + 1);
05a94332f08b In #if/#elif, prune comments *after* macro expansion.
David A. Holland
parents: 81
diff changeset
404
154
a2c2fe8dbea3 Wrap up the current and next line position when invoking directives.
David A. Holland
parents: 128
diff changeset
405 if (tryinclude(&lp->current, text)) {
39
337110e7240a Pass the size to free; it makes debug checking easier.
David A. Holland
parents: 38
diff changeset
406 dostrfree(text);
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
407 return;
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
408 }
154
a2c2fe8dbea3 Wrap up the current and next line position when invoking directives.
David A. Holland
parents: 128
diff changeset
409 complain(&lp->current, "Illegal #include directive");
a2c2fe8dbea3 Wrap up the current and next line position when invoking directives.
David A. Holland
parents: 128
diff changeset
410 complain(&lp->current, "Before macro expansion: #include %s", line);
a2c2fe8dbea3 Wrap up the current and next line position when invoking directives.
David A. Holland
parents: 128
diff changeset
411 complain(&lp->current, "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
412 dostrfree(text);
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
413 complain_fail();
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
414 }
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
415
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
416 static
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
417 void
154
a2c2fe8dbea3 Wrap up the current and next line position when invoking directives.
David A. Holland
parents: 128
diff changeset
418 d_line(struct lineplace *lp, struct place *p2, char *line)
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
419 {
160
d6e6b3940780 Fully implement #line.
Joerg Sonnenberger <joerg@bec.de>
parents: 128
diff changeset
420 char *text;
d6e6b3940780 Fully implement #line.
Joerg Sonnenberger <joerg@bec.de>
parents: 128
diff changeset
421 size_t oldlen;
165
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
422 unsigned long val;
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
423 char *moretext;
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
424 size_t moretextlen;
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
425 char *filename;
160
d6e6b3940780 Fully implement #line.
Joerg Sonnenberger <joerg@bec.de>
parents: 128
diff changeset
426
d6e6b3940780 Fully implement #line.
Joerg Sonnenberger <joerg@bec.de>
parents: 128
diff changeset
427 text = macroexpand(p2, line, strlen(line), true);
d6e6b3940780 Fully implement #line.
Joerg Sonnenberger <joerg@bec.de>
parents: 128
diff changeset
428
d6e6b3940780 Fully implement #line.
Joerg Sonnenberger <joerg@bec.de>
parents: 128
diff changeset
429 oldlen = strlen(text);
d6e6b3940780 Fully implement #line.
Joerg Sonnenberger <joerg@bec.de>
parents: 128
diff changeset
430 uncomment(text);
d6e6b3940780 Fully implement #line.
Joerg Sonnenberger <joerg@bec.de>
parents: 128
diff changeset
431 /* trim to fit, so the malloc debugging won't complain */
d6e6b3940780 Fully implement #line.
Joerg Sonnenberger <joerg@bec.de>
parents: 128
diff changeset
432 text = dorealloc(text, oldlen + 1, strlen(text) + 1);
103
343af355df1b Pass -Wunused.
David A. Holland
parents: 99
diff changeset
433
165
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
434 /*
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
435 * What we should have here: either 1234 "file.c",
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
436 * or just 1234.
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
437 */
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
438
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
439 errno = 0;
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
440 val = strtoul(text, &moretext, 10);
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
441 if (errno) {
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
442 complain(&lp->current, "No line number in #line directive");
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
443 goto fail;
160
d6e6b3940780 Fully implement #line.
Joerg Sonnenberger <joerg@bec.de>
parents: 128
diff changeset
444 }
165
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
445 #if UINT_MAX < ULONG_MAX
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
446 if (val > UINT_MAX) {
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
447 complain(&lp->current,
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
448 "Line number in #line directive too large");
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
449 goto fail;
160
d6e6b3940780 Fully implement #line.
Joerg Sonnenberger <joerg@bec.de>
parents: 128
diff changeset
450 }
165
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
451 #endif
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
452 moretext += strspn(moretext, ws);
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
453 moretextlen = strlen(moretext);
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
454 lp->current.column += (moretext - text);
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
455
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
456 if (moretextlen > 2 &&
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
457 moretext[0] == '"' && moretext[moretextlen-1] == '"') {
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
458 filename = dostrndup(moretext+1, moretextlen-2);
176
a2f047301c15 Replace Joerg's place_setfile with something that at least sort of works.
David A. Holland
parents: 175
diff changeset
459 place_changefile(&lp->nextline, filename);
160
d6e6b3940780 Fully implement #line.
Joerg Sonnenberger <joerg@bec.de>
parents: 128
diff changeset
460 dostrfree(filename);
d6e6b3940780 Fully implement #line.
Joerg Sonnenberger <joerg@bec.de>
parents: 128
diff changeset
461 }
165
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
462 else if (moretextlen > 0) {
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
463 complain(&lp->current,
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
464 "Invalid file name in #line directive");
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
465 goto fail;
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
466 }
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
467
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
468 lp->nextline.line = val;
160
d6e6b3940780 Fully implement #line.
Joerg Sonnenberger <joerg@bec.de>
parents: 128
diff changeset
469 dostrfree(text);
d6e6b3940780 Fully implement #line.
Joerg Sonnenberger <joerg@bec.de>
parents: 128
diff changeset
470 return;
d6e6b3940780 Fully implement #line.
Joerg Sonnenberger <joerg@bec.de>
parents: 128
diff changeset
471
165
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
472 fail:
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
473 complain(&lp->current, "Before macro expansion: #line %s", line);
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
474 complain(&lp->current, "After macro expansion: #line %s", text);
cc6d6f27d6ee Fix Joerg's #line code.
David A. Holland
parents: 164
diff changeset
475 complain_fail();
160
d6e6b3940780 Fully implement #line.
Joerg Sonnenberger <joerg@bec.de>
parents: 128
diff changeset
476 dostrfree(text);
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
477 }
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
478
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
479 ////////////////////////////////////////////////////////////
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
480 // messages
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
481
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
482 static
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
483 void
154
a2c2fe8dbea3 Wrap up the current and next line position when invoking directives.
David A. Holland
parents: 128
diff changeset
484 d_warning(struct lineplace *lp, struct place *p2, char *line)
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
485 {
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
486 char *msg;
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
487
64
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
David A. Holland
parents: 62
diff changeset
488 msg = macroexpand(p2, line, strlen(line), false);
154
a2c2fe8dbea3 Wrap up the current and next line position when invoking directives.
David A. Holland
parents: 128
diff changeset
489 complain(&lp->current, "#warning: %s", msg);
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
490 if (mode.werror) {
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
491 complain_fail();
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
492 }
39
337110e7240a Pass the size to free; it makes debug checking easier.
David A. Holland
parents: 38
diff changeset
493 dostrfree(msg);
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
494 }
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
495
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
496 static
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
497 void
154
a2c2fe8dbea3 Wrap up the current and next line position when invoking directives.
David A. Holland
parents: 128
diff changeset
498 d_error(struct lineplace *lp, struct place *p2, char *line)
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
499 {
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
500 char *msg;
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
501
64
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
David A. Holland
parents: 62
diff changeset
502 msg = macroexpand(p2, line, strlen(line), false);
154
a2c2fe8dbea3 Wrap up the current and next line position when invoking directives.
David A. Holland
parents: 128
diff changeset
503 complain(&lp->current, "#error: %s", msg);
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
504 complain_fail();
39
337110e7240a Pass the size to free; it makes debug checking easier.
David A. Holland
parents: 38
diff changeset
505 dostrfree(msg);
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
506 }
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
507
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
508 ////////////////////////////////////////////////////////////
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
509 // other
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
510
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
511 static
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
512 void
154
a2c2fe8dbea3 Wrap up the current and next line position when invoking directives.
David A. Holland
parents: 128
diff changeset
513 d_pragma(struct lineplace *lp, struct place *p2, char *line)
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
514 {
103
343af355df1b Pass -Wunused.
David A. Holland
parents: 99
diff changeset
515 (void)p2;
343af355df1b Pass -Wunused.
David A. Holland
parents: 99
diff changeset
516
154
a2c2fe8dbea3 Wrap up the current and next line position when invoking directives.
David A. Holland
parents: 128
diff changeset
517 complain(&lp->current, "#pragma %s", line);
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
518 complain_fail();
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
519 }
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
520
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
521 ////////////////////////////////////////////////////////////
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
522 // directive table
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
523
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
524 static const struct {
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
525 const char *name;
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
526 bool ifskip;
154
a2c2fe8dbea3 Wrap up the current and next line position when invoking directives.
David A. Holland
parents: 128
diff changeset
527 void (*func)(struct lineplace *, struct place *, char *line);
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
528 } directives[] = {
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
529 { "define", true, d_define },
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
530 { "elif", false, d_elif },
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
531 { "else", false, d_else },
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
532 { "endif", false, d_endif },
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
533 { "error", true, d_error },
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
534 { "if", false, d_if },
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
535 { "ifdef", false, d_ifdef },
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
536 { "ifndef", false, d_ifndef },
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
537 { "include", true, d_include },
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
538 { "line", true, d_line },
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
539 { "pragma", true, d_pragma },
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
540 { "undef", true, d_undef },
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
541 { "warning", true, d_warning },
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
542 };
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
543 static const unsigned numdirectives = HOWMANY(directives);
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
544
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
545 static
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
546 void
154
a2c2fe8dbea3 Wrap up the current and next line position when invoking directives.
David A. Holland
parents: 128
diff changeset
547 directive_gotdirective(struct lineplace *lp, char *line)
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
548 {
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
549 struct place p2;
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
550 size_t len, skip;
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
551 unsigned i;
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
552
154
a2c2fe8dbea3 Wrap up the current and next line position when invoking directives.
David A. Holland
parents: 128
diff changeset
553 p2 = lp->current;
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
554 for (i=0; i<numdirectives; i++) {
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
555 len = strlen(directives[i].name);
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
556 if (!strncmp(line, directives[i].name, len) &&
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
557 strchr(ws, line[len])) {
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
558 if (directives[i].ifskip && !ifstate->curtrue) {
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
559 return;
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
560 }
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
561 skip = len + strspn(line+len, ws);
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
562 p2.column += skip;
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
563 line += skip;
64
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
David A. Holland
parents: 62
diff changeset
564
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
David A. Holland
parents: 62
diff changeset
565 len = strlen(line);
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
David A. Holland
parents: 62
diff changeset
566 len = notrailingws(line, len);
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
David A. Holland
parents: 62
diff changeset
567 if (len < strlen(line)) {
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
David A. Holland
parents: 62
diff changeset
568 line[len] = '\0';
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
David A. Holland
parents: 62
diff changeset
569 }
154
a2c2fe8dbea3 Wrap up the current and next line position when invoking directives.
David A. Holland
parents: 128
diff changeset
570 directives[i].func(lp, &p2, line);
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
571 return;
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
572 }
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
573 }
83
3e505c16b0b0 Accept # by itself, including with a comment after it.
David A. Holland
parents: 82
diff changeset
574 /* 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
575 uncomment(line);
3e505c16b0b0 Accept # by itself, including with a comment after it.
David A. Holland
parents: 82
diff changeset
576 if (line[0] == '\0') {
3e505c16b0b0 Accept # by itself, including with a comment after it.
David A. Holland
parents: 82
diff changeset
577 return;
3e505c16b0b0 Accept # by itself, including with a comment after it.
David A. Holland
parents: 82
diff changeset
578 }
3e505c16b0b0 Accept # by itself, including with a comment after it.
David A. Holland
parents: 82
diff changeset
579
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
580 skip = strcspn(line, ws);
154
a2c2fe8dbea3 Wrap up the current and next line position when invoking directives.
David A. Holland
parents: 128
diff changeset
581 complain(&lp->current, "Unknown directive #%.*s", (int)skip, line);
15
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
582 complain_fail();
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
583 }
f6177d3ed5c2 handle directives
David A. Holland
parents:
diff changeset
584
49
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585 /*
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586 * Check for nested comment delimiters in LINE.
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587 */
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588 static
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589 size_t
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590 directive_scancomments(const struct lineplace *lp, char *line, size_t len)
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591 {
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592 size_t pos;
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593 bool incomment;
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594 struct place p2;
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595
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596 p2 = lp->current;
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597 incomment = 0;
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598 for (pos = 0; pos+1 < len; pos++) {
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599 if (line[pos] == '/' && line[pos+1] == '*') {
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600 if (incomment) {
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601 complain(&p2, "Warning: %c%c within comment",
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602 '/', '*');
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603 if (mode.werror) {
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604 complain_failed();
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605 }
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606 } else {
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607 incomment = true;
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608 }
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609 pos++;
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610 } else if (line[pos] == '*' && line[pos+1] == '/') {
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611 if (incomment) {
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612 incomment = false;
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613 } else {
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614 /* stray end-comment; should we care? */
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615 }
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616 pos++;
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617 }
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618 if (line[pos] == '\n') {
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619 p2.line++;
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620 p2.column = 0;
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621 } else {
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622 p2.column++;
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623 }
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624 }
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625
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626 /* multiline comments are supposed to arrive in a single buffer */
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627 assert(!incomment);
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628 return len;
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629 }
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630
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631 void
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632 directive_gotline(struct lineplace *lp, char *line, size_t len)
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633 {
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634 size_t skip;
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635
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636 if (warns.nestcomment) {
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637 directive_scancomments(lp, line, len);
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638 }
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639
66
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diff changeset
640 /* check if we have a directive line (# exactly in column 0) */
175
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641 if (len > 0 && line[0] == '#') {
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diff changeset
642 skip = 1 + strspn(line + 1, ws);
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diff changeset
643 assert(skip <= len);
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diff changeset
644 lp->current.column += skip;
64
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645 assert(line[len] == '\0');
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646 directive_gotdirective(lp, line+skip /*, length = len-skip */);
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diff changeset
647 lp->current.column += len-skip;
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648 } else if (ifstate->curtrue) {
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649 macro_sendline(&lp->current, line, len);
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650 lp->current.column += len;
15
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651 }
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652 }
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653
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654 void
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655 directive_goteof(struct place *p)
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656 {
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657 while (ifstate->prev != NULL) {
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658 complain(p, "Missing #endif");
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659 complain(&ifstate->startplace, "...opened at this point");
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660 complain_failed();
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661 ifstate_pop();
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662 }
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663 macro_sendeof(p);
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664 }
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665
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666 ////////////////////////////////////////////////////////////
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667 // module initialization
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668
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669 void
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670 directive_init(void)
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671 {
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672 ifstate = ifstate_create(NULL, NULL, true);
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673 }
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674
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675 void
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676 directive_cleanup(void)
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677 {
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678 assert(ifstate->prev == NULL);
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679 ifstate_destroy(ifstate);
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680 ifstate = NULL;
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681 }