annotate output.c @ 114:05d67dd74e1f

Reduce the maximum include depth from 128 to 120. This way with the default limits on netbsd we hit it before we run out of file handles.
author David A. Holland
date Tue, 11 Jun 2013 13:55:38 -0400
parents 343af355df1b
children 1cda505ddc78
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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 <err.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 warn("%s", mode.output_file);
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57 die();
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58 }
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59 }
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60 }
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61
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62 static
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63 void
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64 dowrite(const char *buf, size_t len)
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65 {
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66 size_t done;
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67 ssize_t result;
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68 static unsigned write_errors = 0;
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69
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70 if (!mode.do_output) {
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71 return;
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72 }
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73
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74 if (outputfd < 0) {
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75 output_open();
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76 }
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77
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78 done = 0;
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79 while (done < len) {
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80 result = write(outputfd, buf+done, len-done);
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81 if (result == -1) {
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82 warn("%s: write", mode.output_file);
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83 complain_failed();
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84 write_errors++;
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85 if (write_errors > 5) {
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86 warnx("%s: giving up", mode.output_file);
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87 die();
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88 }
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89 /* XXX is this really a good idea? */
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90 sleep(1);
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91 }
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92 done += (size_t)result;
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93 }
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94 }
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95
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96
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97 static
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98 void
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99 filter_output(const char *buf, size_t len)
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100 {
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101 size_t pos, start;
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102 bool inesc = false;
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103 bool inquote = false;
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104
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105 start = 0;
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106 for (pos = 0; pos < len - 1; pos++) {
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107 if (!inquote && buf[pos] == '/' && buf[pos+1] == '*') {
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108 if (!incomment) {
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109 if (pos > start) {
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110 dowrite(buf + start, pos - start);
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111 }
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112 start = pos;
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113 pos += 2;
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114 incomment = true;
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115 /* cancel out the loop's pos++ */
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116 pos--;
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117 continue;
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118 }
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119 } else if (buf[pos] == '*' && buf[pos+1] == '/') {
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120 if (incomment) {
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121 pos += 2;
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122 if (mode.output_retain_comments) {
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123 dowrite(buf + start, pos - start);
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124 }
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125 start = pos;
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126 incomment = false;
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127 /* cancel out the loop's pos++ */
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128 pos--;
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129 continue;
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130 }
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131 }
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132
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133 if (incomment) {
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134 /* nothing */
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135 } else if (inesc) {
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136 inesc = false;
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137 } else if (buf[pos] == '\\') {
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138 inesc = true;
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139 } else if (buf[pos] == '"') {
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140 inquote = !inquote;
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141 }
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142 }
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143 pos++;
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144
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145 if (pos > start) {
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146 if (!incomment || mode.output_retain_comments) {
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147 dowrite(buf + start, pos - start);
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148 }
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149 }
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150 }
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151
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152 void
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153 output(const struct place *p, const char *buf, size_t len)
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154 {
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155 size_t oldmax;
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156
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157 if (linebufpos + len > linebufmax) {
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158 oldmax = linebufmax;
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159 if (linebufmax == 0) {
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160 linebufmax = 64;
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161 }
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162 while (linebufpos + len > linebufmax) {
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163 linebufmax *= 2;
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164 }
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165 linebuf = dorealloc(linebuf, oldmax, linebufmax);
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166 }
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167 if (linebufpos == 0) {
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168 linebufplace = *p;
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169 }
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170 memcpy(linebuf + linebufpos, buf, len);
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171 linebufpos += len;
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172
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173 if (len == 1 && buf[0] == '\n') {
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174 filter_output(linebuf, linebufpos);
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175 linebufpos = 0;
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176 }
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177 }
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178
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179 void
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180 output_eof(void)
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181 {
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182 if (mode.output_file != NULL && outputfd >= 0) {
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183 close(outputfd);
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184 }
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185 outputfd = -1;
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186 }