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30
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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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27
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30 #include <string.h>
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20
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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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21
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37 #include "place.h"
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20
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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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21
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41 static bool incomment = false;
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27
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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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20
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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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24
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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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20
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59 }
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60 }
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61
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21
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62 static
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20
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63 void
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21
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64 dowrite(const char *buf, size_t len)
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20
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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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22
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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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20
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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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27
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96
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97 static
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20
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98 void
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99 filter_output(const struct place *p, const char *buf, size_t len)
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21
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100 {
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101 size_t pos, start;
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102 struct place p2;
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103
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104 start = 0;
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105 for (pos = 0; pos < len - 1; pos++) {
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106 if (buf[pos] == '/' && buf[pos+1] == '*') {
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107 if (incomment && warns.nestcomment) {
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108 p2 = *p;
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109 p2.column += pos;
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110 complain(p, "Warning: %c%c within comment",
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111 '/', '*');
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112 if (mode.werror) {
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113 complain_failed();
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114 }
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115 } else if (!incomment) {
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116 if (pos > start) {
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117 dowrite(buf + start, pos - start);
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118 }
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119 start = pos;
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120 pos += 2;
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121 incomment = true;
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122 /* cancel out the loop's pos++ */
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123 pos--;
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124 continue;
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125 }
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126 } else if (buf[pos] == '*' && buf[pos+1] == '/') {
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127 if (incomment) {
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128 pos += 2;
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129 if (mode.output_retain_comments) {
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130 dowrite(buf + start, pos - start);
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131 }
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132 start = pos;
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133 incomment = false;
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134 /* cancel out the loop's pos++ */
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135 pos--;
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136 continue;
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137 }
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138 }
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139 }
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24
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140 pos++;
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141
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142 if (pos > start) {
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143 if (!incomment || mode.output_retain_comments) {
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144 dowrite(buf + start, pos - start);
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145 }
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146 }
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21
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147 }
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148
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149 void
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27
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150 output(const struct place *p, const char *buf, size_t len)
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151 {
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152 if (linebufpos + len > linebufmax) {
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153 if (linebufmax == 0) {
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154 linebufmax = 64;
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155 }
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156 while (linebufpos + len > linebufmax) {
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157 linebufmax *= 2;
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158 }
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159 linebuf = dorealloc(linebuf, linebufmax);
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160 }
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161 if (linebufpos == 0) {
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162 linebufplace = *p;
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163 }
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164 memcpy(linebuf + linebufpos, buf, len);
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165 linebufpos += len;
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166
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167 if (len == 1 && buf[0] == '\n') {
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168 filter_output(&linebufplace, linebuf, linebufpos);
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169 linebufpos = 0;
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170 }
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171 }
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172
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173 void
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20
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174 output_eof(void)
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175 {
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24
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176 if (mode.output_file != NULL && outputfd >= 0) {
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20
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177 close(outputfd);
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178 }
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179 outputfd = -1;
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180 }
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