annotate directive.c @ 146:15f51ed08ecf

Add more tests for some degenerate cases we don't handle right.
author David A. Holland
date Sat, 13 Jul 2013 14:47:29 -0400
parents 1cda505ddc78
children a2c2fe8dbea3 d6e6b3940780
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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
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35 #include "utils.h"
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36 #include "mode.h"
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37 #include "place.h"
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38 #include "files.h"
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39 #include "directive.h"
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40 #include "macro.h"
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41 #include "eval.h"
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42 #include "output.h"
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43
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44 struct ifstate {
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45 struct ifstate *prev;
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46 struct place startplace;
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47 bool curtrue;
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48 bool evertrue;
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49 bool seenelse;
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50 };
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51
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52 static struct ifstate *ifstate;
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53
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54 ////////////////////////////////////////////////////////////
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55 // common parsing bits
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56
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57 static
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58 void
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59 uncomment(char *buf)
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60 {
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61 char *s, *t, *u = NULL;
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62 bool incomment = false;
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63 bool inesc = false;
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64 bool inquote = false;
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65 char quote = '\0';
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66
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67 for (s = t = buf; *s; s++) {
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68 if (incomment) {
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69 if (s[0] == '*' && s[1] == '/') {
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70 s++;
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71 incomment = false;
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72 }
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73 } else {
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74 if (!inquote && s[0] == '/' && s[1] == '*') {
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75 incomment = true;
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76 } else {
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77 if (inesc) {
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78 inesc = false;
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79 } else if (s[0] == '\\') {
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80 inesc = true;
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81 } else if (!inquote &&
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82 (s[0] == '"' || s[0] == '\'')) {
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83 inquote = true;
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84 quote = s[0];
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85 } else if (inquote && s[0] == quote) {
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86 inquote = false;
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87 }
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88
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89 if (t != s) {
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90 *t = *s;
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91 }
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92 if (!strchr(ws, *t)) {
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93 u = t;
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94 }
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95 t++;
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96 }
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97 }
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98 }
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99 if (u) {
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100 /* end string after last non-whitespace char */
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101 u[1] = '\0';
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102 } else {
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103 *t = '\0';
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104 }
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105 }
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106
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107 static
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108 void
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109 oneword(const char *what, struct place *p2, char *line)
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110 {
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111 size_t pos;
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112
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113 pos = strcspn(line, ws);
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114 if (line[pos] != '\0') {
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115 p2->column += pos;
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116 complain(p2, "Garbage after %s argument", what);
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117 complain_fail();
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118 line[pos] = '\0';
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119 }
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120 }
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121
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122 ////////////////////////////////////////////////////////////
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123 // if handling
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124
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125 static
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126 struct ifstate *
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127 ifstate_create(struct ifstate *prev, struct place *p, bool startstate)
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128 {
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129 struct ifstate *is;
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130
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131 is = domalloc(sizeof(*is));
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132 is->prev = prev;
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133 if (p != NULL) {
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134 is->startplace = *p;
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135 } else {
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136 place_setbuiltin(&is->startplace, 1);
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137 }
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138 is->curtrue = startstate;
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139 is->evertrue = is->curtrue;
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140 is->seenelse = false;
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141 return is;
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142 }
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143
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144 static
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145 void
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146 ifstate_destroy(struct ifstate *is)
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147 {
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148 dofree(is, sizeof(*is));
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149 }
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150
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151 static
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152 void
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153 ifstate_push(struct place *p, bool startstate)
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154 {
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155 struct ifstate *newstate;
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156
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157 newstate = ifstate_create(ifstate, p, startstate);
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158 if (!ifstate->curtrue) {
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159 newstate->curtrue = false;
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160 newstate->evertrue = true;
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161 }
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162 ifstate = newstate;
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163 }
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164
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165 static
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166 void
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167 ifstate_pop(void)
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168 {
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169 struct ifstate *is;
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170
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171 is = ifstate;
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172 ifstate = ifstate->prev;
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173 ifstate_destroy(is);
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174 }
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175
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176 static
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177 void
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178 d_if(struct place *p, struct place *p2, char *line)
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179 {
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180 char *expr;
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181 bool val;
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182 struct place p3 = *p2;
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183 size_t oldlen;
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184
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185 expr = macroexpand(p2, line, strlen(line), true);
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186
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187 oldlen = strlen(expr);
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188 uncomment(expr);
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189 /* trim to fit, so the malloc debugging won't complain */
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190 expr = dorealloc(expr, oldlen + 1, strlen(expr) + 1);
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191
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192 if (ifstate->curtrue) {
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193 val = eval(&p3, expr);
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194 } else {
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195 val = 0;
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196 }
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197 ifstate_push(p, val);
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198 dostrfree(expr);
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199 }
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200
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201 static
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202 void
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203 d_ifdef(struct place *p, struct place *p2, char *line)
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204 {
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205 uncomment(line);
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206 oneword("#ifdef", p2, line);
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207 ifstate_push(p, macro_isdefined(line));
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208 }
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209
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210 static
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211 void
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212 d_ifndef(struct place *p, struct place *p2, char *line)
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213 {
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214 uncomment(line);
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215 oneword("#ifndef", p2, line);
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216 ifstate_push(p, !macro_isdefined(line));
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217 }
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218
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219 static
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220 void
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221 d_elif(struct place *p, struct place *p2, char *line)
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222 {
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223 char *expr;
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224 struct place p3 = *p2;
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225 size_t oldlen;
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226
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227 if (ifstate->seenelse) {
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228 complain(p, "#elif after #else");
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229 complain_fail();
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230 }
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231
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232 if (ifstate->evertrue) {
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233 ifstate->curtrue = false;
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234 } else {
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235 expr = macroexpand(p2, line, strlen(line), true);
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236
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237 oldlen = strlen(expr);
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238 uncomment(expr);
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239 /* trim to fit, so the malloc debugging won't complain */
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240 expr = dorealloc(expr, oldlen + 1, strlen(expr) + 1);
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241
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242 ifstate->curtrue = eval(&p3, expr);
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243 ifstate->evertrue = ifstate->curtrue;
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337110e7240a Pass the size to free; it makes debug checking easier.
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244 dostrfree(expr);
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245 }
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246 }
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247
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248 static
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249 void
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250 d_else(struct place *p, struct place *p2, char *line)
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251 {
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343af355df1b Pass -Wunused.
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252 (void)p2;
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253 (void)line;
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254
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255 if (ifstate->seenelse) {
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256 complain(p, "Multiple #else directives in one conditional");
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257 complain_fail();
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258 }
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259
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260 ifstate->curtrue = !ifstate->evertrue;
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261 ifstate->evertrue = true;
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262 ifstate->seenelse = true;
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263 }
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264
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265 static
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266 void
64
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267 d_endif(struct place *p, struct place *p2, char *line)
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268 {
103
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269 (void)p2;
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270 (void)line;
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271
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272 if (ifstate->prev == NULL) {
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273 complain(p, "Unmatched #endif");
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274 complain_fail();
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275 } else {
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276 ifstate_pop();
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277 }
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278 }
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279
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280 ////////////////////////////////////////////////////////////
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281 // macros
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282
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283 static
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284 void
64
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
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285 d_define(struct place *p, struct place *p2, char *line)
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286 {
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287 size_t pos, argpos;
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288 struct place p3, p4;
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289
103
343af355df1b Pass -Wunused.
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290 (void)p;
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291
15
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292 /*
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293 * line may be:
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294 * macro expansion
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295 * macro(arg, arg, ...) expansion
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296 */
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297
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298 pos = strcspn(line, " \t\f\v(");
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299 if (line[pos] == '(') {
18
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300 line[pos++] = '\0';
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301 argpos = pos;
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302 pos = pos + strcspn(line+pos, "()");
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303 if (line[pos] == '(') {
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304 p2->column += pos;
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305 complain(p2, "Left parenthesis in macro parameters");
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306 complain_fail();
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307 return;
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308 }
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309 if (line[pos] != ')') {
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310 p2->column += pos;
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311 complain(p2, "Unclosed macro parameter list");
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312 complain_fail();
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313 return;
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314 }
18
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315 line[pos++] = '\0';
36
a489cc223483 Don't demand space after the macro argument parenthesis.
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diff changeset
316 #if 0
15
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317 if (!strchr(ws, line[pos])) {
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318 p2->column += pos;
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319 complain(p2, "Trash after macro parameter list");
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320 complain_fail();
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321 return;
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322 }
36
a489cc223483 Don't demand space after the macro argument parenthesis.
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323 #endif
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324 } else if (line[pos] == '\0') {
18
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325 argpos = 0;
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326 } else {
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327 line[pos++] = '\0';
18
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328 argpos = 0;
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329 }
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330
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331 pos += strspn(line+pos, ws);
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332
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333 p3 = *p2;
18
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334 p3.column += argpos;
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diff changeset
335
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336 p4 = *p2;
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337 p4.column += pos;
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diff changeset
338
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339 if (argpos) {
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diff changeset
340 macro_define_params(p2, line, &p3,
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341 line + argpos, &p4,
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342 line + pos);
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343 } else {
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344 macro_define_plain(p2, line, &p4, line + pos);
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345 }
15
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346 }
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347
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348 static
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349 void
64
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
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350 d_undef(struct place *p, struct place *p2, char *line)
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351 {
103
343af355df1b Pass -Wunused.
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352 (void)p;
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diff changeset
353
64
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354 uncomment(line);
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355 oneword("#undef", p2, line);
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356 macro_undef(line);
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357 }
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358
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359 ////////////////////////////////////////////////////////////
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360 // includes
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361
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362 static
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363 bool
64
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364 tryinclude(struct place *p, char *line)
15
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365 {
64
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
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366 size_t len;
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367
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diff changeset
368 len = strlen(line);
15
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369 if (len > 2 && line[0] == '"' && line[len-1] == '"') {
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370 line[len-1] = '\0';
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371 file_readquote(p, line+1);
62
90c6052410ce Don't truncate the candidate include path strings.
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diff changeset
372 line[len-1] = '"';
15
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373 return true;
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374 }
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375 if (len > 2 && line[0] == '<' && line[len-1] == '>') {
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376 line[len-1] = '\0';
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377 file_readbracket(p, line+1);
62
90c6052410ce Don't truncate the candidate include path strings.
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diff changeset
378 line[len-1] = '>';
15
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379 return true;
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380 }
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381 return false;
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382 }
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383
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384 static
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385 void
64
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
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diff changeset
386 d_include(struct place *p, struct place *p2, char *line)
15
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387 {
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388 char *text;
82
05a94332f08b In #if/#elif, prune comments *after* macro expansion.
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diff changeset
389 size_t oldlen;
15
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diff changeset
390
64
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
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diff changeset
391 uncomment(line);
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
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diff changeset
392 if (tryinclude(p, line)) {
15
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393 return;
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394 }
64
f50b4ea6cbfe Prune single-line comments from (most) directive lines.
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diff changeset
395 text = macroexpand(p2, line, strlen(line), false);
82
05a94332f08b In #if/#elif, prune comments *after* macro expansion.
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diff changeset
396
05a94332f08b In #if/#elif, prune comments *after* macro expansion.
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diff changeset
397 oldlen = strlen(text);
05a94332f08b In #if/#elif, prune comments *after* macro expansion.
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diff changeset
398 uncomment(text);
05a94332f08b In #if/#elif, prune comments *after* macro expansion.
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diff changeset
399 /* trim to fit, so the malloc debugging won't complain */
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400 text = dorealloc(text, oldlen + 1, strlen(text) + 1);
05a94332f08b In #if/#elif, prune comments *after* macro expansion.
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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
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parents:
diff changeset
422 }
f6177d3ed5c2 handle directives
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parents:
diff changeset
423
f6177d3ed5c2 handle directives
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parents:
diff changeset
424 ////////////////////////////////////////////////////////////
f6177d3ed5c2 handle directives
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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
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594 macro_sendline(p, line, len);
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595 p->column += len;
15
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596 }
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597 }
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598
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599 void
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600 directive_goteof(struct place *p)
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601 {
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602 while (ifstate->prev != NULL) {
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603 complain(p, "Missing #endif");
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604 complain(&ifstate->startplace, "...opened at this point");
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605 complain_failed();
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606 ifstate_pop();
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607 }
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608 macro_sendeof(p);
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609 }
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610
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611 ////////////////////////////////////////////////////////////
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612 // module initialization
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613
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614 void
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615 directive_init(void)
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616 {
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617 ifstate = ifstate_create(NULL, NULL, true);
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618 }
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619
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620 void
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621 directive_cleanup(void)
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622 {
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623 assert(ifstate->prev == NULL);
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624 ifstate_destroy(ifstate);
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625 ifstate = NULL;
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626 }