annotate output.c @ 172:3e7e696fe558

Clean up the mess Joerg made of apply_builtin_macros().
author David A. Holland
date Fri, 12 Jun 2015 02:14:45 -0400
parents ed45f2d8d3bc
children 16b4451e34b8
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1 /*-
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2 * Copyright (c) 2010 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 <string.h>
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31 #include <unistd.h>
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32 #include <fcntl.h>
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33 #include <errno.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 "output.h"
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39
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40 static int outputfd = -1;
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41 static bool incomment = false;
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42 static char *linebuf;
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43 static size_t linebufpos, linebufmax;
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44 static struct place linebufplace;
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45
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46 static
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47 void
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48 output_open(void)
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49 {
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50 if (mode.output_file == NULL) {
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51 outputfd = STDOUT_FILENO;
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52 } else {
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53 outputfd = open(mode.output_file, O_WRONLY|O_CREAT|O_TRUNC,
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54 0664);
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55 if (outputfd < 0) {
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56 complain(NULL, "%s: %s",
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57 mode.output_file, strerror(errno));
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58 die();
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59 }
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60 }
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61 }
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62
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63 static
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64 void
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65 dowrite(const char *buf, size_t len)
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66 {
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67 size_t done;
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68 ssize_t result;
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69 static unsigned write_errors = 0;
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70
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71 if (!mode.do_output) {
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72 return;
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73 }
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74
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75 if (outputfd < 0) {
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76 output_open();
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77 }
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78
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79 done = 0;
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80 while (done < len) {
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81 result = write(outputfd, buf+done, len-done);
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82 if (result == -1) {
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83 complain(NULL, "%s: write: %s",
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84 mode.output_file, strerror(errno));
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85 complain_failed();
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86 write_errors++;
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87 if (write_errors > 5) {
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88 complain(NULL, "%s: giving up",
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89 mode.output_file);
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90 die();
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91 }
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92 /* XXX is this really a good idea? */
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93 sleep(1);
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94 }
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95 done += (size_t)result;
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96 }
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97 }
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98
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99
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100 static
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101 void
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102 filter_output(const char *buf, size_t len)
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103 {
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104 size_t pos, start;
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105 bool inesc = false;
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106 bool inquote = false;
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107 char quote = '\0';
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108
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109 start = 0;
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110 for (pos = 0; pos < len - 1; pos++) {
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111 if (!inquote && buf[pos] == '/' && buf[pos+1] == '*') {
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112 if (!incomment) {
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113 if (pos > start) {
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114 dowrite(buf + start, pos - start);
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115 }
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116 start = pos;
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117 pos += 2;
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118 incomment = true;
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119 /* cancel out the loop's pos++ */
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120 pos--;
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121 continue;
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122 }
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123 } else if (buf[pos] == '*' && buf[pos+1] == '/') {
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124 if (incomment) {
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125 pos += 2;
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126 if (mode.output_retain_comments) {
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127 dowrite(buf + start, pos - start);
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128 }
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129 start = pos;
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130 incomment = false;
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131 /* cancel out the loop's pos++ */
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132 pos--;
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133 continue;
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134 }
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135 }
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136
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137 if (incomment) {
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138 /* nothing */
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139 } else if (inesc) {
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140 inesc = false;
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141 } else if (buf[pos] == '\\') {
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142 inesc = true;
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143 } else if (!inquote && (buf[pos] == '"' || buf[pos] == '\'')) {
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144 inquote = true;
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145 quote = buf[pos];
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146 } else if (inquote && buf[pos] == quote) {
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147 inquote = false;
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148 }
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149 }
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150 pos++;
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151
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152 if (pos > start) {
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153 if (!incomment || mode.output_retain_comments) {
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154 dowrite(buf + start, pos - start);
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155 }
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156 }
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157 }
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158
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159 void
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160 output(const struct place *p, const char *buf, size_t len)
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161 {
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162 size_t oldmax;
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163
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164 if (linebufpos + len > linebufmax) {
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165 oldmax = linebufmax;
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166 if (linebufmax == 0) {
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167 linebufmax = 64;
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168 }
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169 while (linebufpos + len > linebufmax) {
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170 linebufmax *= 2;
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171 }
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172 linebuf = dorealloc(linebuf, oldmax, linebufmax);
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173 }
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174 if (linebufpos == 0) {
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175 linebufplace = *p;
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176 }
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177 memcpy(linebuf + linebufpos, buf, len);
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178 linebufpos += len;
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179
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180 if (len == 1 && buf[0] == '\n') {
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181 filter_output(linebuf, linebufpos);
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182 linebufpos = 0;
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183 }
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184 }
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185
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186 void
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187 output_eof(void)
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188 {
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189 if (mode.output_file != NULL && outputfd >= 0) {
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190 close(outputfd);
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191 }
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192 outputfd = -1;
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193 }