Wed, 12 Jun 2013 14:50:27 +0200
fixed worthless memset
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1 | /* |
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2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
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3 | * |
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4 | * Copyright 2013 Mike Becker. All rights reserved. |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions are met: |
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8 | * |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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26 | * POSSIBILITY OF SUCH DAMAGE. |
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27 | * |
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28 | */ |
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29 | |
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30 | #include <stdio.h> |
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31 | #include <stdlib.h> |
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32 | #include <string.h> |
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33 | #include <fcntl.h> |
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34 | #include <unistd.h> |
4 | 35 | #include <ctype.h> |
36 | ||
37 | #define INPUTBUF_SIZE 2048 | |
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38 | #define WORDBUF_SIZE 16 |
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39 | |
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40 | const char* keywords[] = { |
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41 | "auto", "break", "case", "char", "const", "continue", "default", "do", |
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42 | "double", "else", "enum", "extern", "float", "for", "goto", "if", "int", |
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43 | "long", "register", "return", "short", "signed", "sizeof", "static", "struct", |
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44 | "switch", "typedef", "union", "unsigned", "void", "volatile", "while", NULL |
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45 | }; |
4 | 46 | |
47 | ||
48 | typedef struct { | |
49 | size_t count; | |
50 | size_t capacity; | |
51 | size_t maxlinewidth; | |
52 | char** lines; | |
53 | } inputfile_t; | |
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54 | |
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55 | inputfile_t *inputfilebuffer(size_t capacity) { |
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56 | inputfile_t *inputfile = (inputfile_t*) malloc(sizeof(inputfile_t)); |
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57 | inputfile->lines = (char**) malloc(capacity * sizeof(char*)); |
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58 | inputfile->capacity = capacity; |
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59 | inputfile->count = 0; |
4 | 60 | inputfile->maxlinewidth = 0; |
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61 | |
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62 | return inputfile; |
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63 | } |
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64 | |
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65 | void addline(inputfile_t *inputfile, char* line, size_t width) { |
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66 | char *l = (char*) malloc(width+1); |
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67 | memcpy(l, line, width); |
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68 | l[width] = 0; |
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69 | if (inputfile->count >= inputfile->capacity) { |
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70 | inputfile->capacity <<= 1; |
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71 | inputfile->lines = realloc(inputfile->lines, inputfile->capacity); |
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72 | } |
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73 | inputfile->lines[inputfile->count] = l; |
4 | 74 | inputfile->maxlinewidth = |
75 | width > inputfile->maxlinewidth ? width : inputfile->maxlinewidth; | |
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76 | inputfile->count++; |
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77 | } |
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78 | |
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79 | void freeinputfilebuffer(inputfile_t *inputfile) { |
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80 | for (int i = 0 ; i < inputfile->count ; i++) { |
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81 | free(inputfile->lines[i]); |
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82 | } |
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83 | free(inputfile->lines); |
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84 | free(inputfile); |
0 | 85 | } |
86 | ||
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87 | inputfile_t *readinput(char *filename) { |
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88 | |
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89 | int fd = open(filename, O_RDONLY); |
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90 | if (fd == -1) return NULL; |
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91 | |
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92 | inputfile_t *inputfile = inputfilebuffer(512); |
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93 | |
4 | 94 | char buf[INPUTBUF_SIZE]; |
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95 | ssize_t r; |
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96 | |
4 | 97 | size_t maxlinewidth = 256; |
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98 | char *line = (char*) malloc(maxlinewidth); |
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99 | size_t col = 0; |
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100 | |
4 | 101 | while ((r = read(fd, buf, INPUTBUF_SIZE)) > 0) { |
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102 | for (size_t i = 0 ; i < r ; i++) { |
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103 | if (col >= maxlinewidth-4) { |
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104 | maxlinewidth <<= 1; |
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105 | line = realloc(line, maxlinewidth); |
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106 | } |
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107 | |
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108 | if (buf[i] == '\n') { |
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109 | line[col++] = '\n'; |
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110 | line[col] = 0; |
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111 | addline(inputfile, line, col); |
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112 | col = 0; |
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113 | } else { |
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114 | line[col++] = buf[i]; |
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115 | } |
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116 | } |
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117 | } |
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118 | |
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119 | free(line); |
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120 | |
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121 | close(fd); |
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122 | |
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123 | return inputfile; |
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124 | } |
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125 | |
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126 | size_t writeescapedchar(char *dest, size_t dp, char c) { |
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127 | if (c == '>') { |
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128 | dest[dp++] = '&'; dest[dp++] = 'g'; |
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129 | dest[dp++] = 't'; dest[dp++] = ';'; |
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130 | } else if (c == '<') { |
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131 | dest[dp++] = '&'; dest[dp++] = 'l'; |
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132 | dest[dp++] = 't'; dest[dp++] = ';'; |
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133 | } else { |
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134 | dest[dp++] = c; |
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135 | } |
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136 | |
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137 | return dp; |
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138 | } |
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139 | |
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140 | int iskeyword(char *word) { |
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141 | for (int i = 0 ; keywords[i] ; i++) { |
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142 | if (strncmp(keywords[i], word, WORDBUF_SIZE) == 0) { |
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143 | return 1; |
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144 | } |
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145 | } |
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146 | return 0; |
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147 | } |
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148 | |
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149 | #define istype(word, len) (word[len-2] == '_' && word[len-1] == 't') |
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150 | |
4 | 151 | void parseline(char *src, char *dest) { |
152 | size_t sp = 0, dp = 0; | |
153 | /* indent */ | |
154 | while (isspace(src[sp])) { | |
155 | dest[dp++] = src[sp++]; | |
156 | } | |
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157 | char word[WORDBUF_SIZE]; |
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158 | memset(word, 0, WORDBUF_SIZE); |
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159 | size_t wp = 0; |
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160 | int closespan; |
4 | 161 | for (char c = src[sp] ; c ; c=src[++sp]) { |
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162 | if (!isalnum(c) && c != '_') { |
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163 | /* interpret word int_t */ |
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164 | if (wp > 0 && wp < WORDBUF_SIZE) { |
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165 | if (iskeyword(word)) { |
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166 | memcpy(&(dest[dp]), "<span class=\"c2html-keyword\">", 29); |
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167 | dp += 29; |
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168 | closespan = 1; |
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169 | } else if (istype(word, wp)) { |
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170 | memcpy(&(dest[dp]), "<span class=\"c2html-type\">", 26); |
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171 | dp += 26; |
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172 | closespan = 1; |
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173 | } else { |
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174 | closespan = 0; |
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175 | } |
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176 | for (int i = 0 ; i < wp ; i++) { |
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177 | dp = writeescapedchar(dest, dp, word[i]); |
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178 | } |
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179 | if (closespan) { |
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180 | memcpy(&(dest[dp]), "</span>", 7); |
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181 | dp += 7; |
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182 | } |
6 | 183 | memset(word, 0, WORDBUF_SIZE); |
184 | wp = 0; | |
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185 | } |
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186 | dp = writeescapedchar(dest, dp, c); |
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187 | } else { |
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188 | /* read word */ |
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189 | if (wp < WORDBUF_SIZE) { |
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190 | word[wp++] = c; |
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191 | } else if (wp == WORDBUF_SIZE) { |
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192 | for (int i = 0 ; i < WORDBUF_SIZE ; i++) { |
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193 | dp = writeescapedchar(dest, dp, word[i]); |
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194 | } |
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195 | wp++; |
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196 | dp = writeescapedchar(dest, dp, c); |
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197 | } else { |
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198 | dp = writeescapedchar(dest, dp, c); |
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199 | } |
4 | 200 | } |
201 | } | |
202 | dest[dp] = 0; | |
203 | } | |
204 | ||
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205 | void printhelp() { |
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206 | printf("Formats source code using HTML.\n\nUsage:\n" |
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207 | " c2html [FILE...]" |
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208 | "\n"); |
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209 | |
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210 | |
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211 | } |
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212 | |
4 | 213 | int lnint(size_t lnc) { |
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214 | int w = 1, p = 1; |
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215 | while ((p*=10) < lnc) w++; |
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216 | return w; |
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217 | } |
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218 | |
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219 | int main(int argc, char** argv) { |
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220 | |
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221 | if (argc == 1) { |
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222 | printhelp(); |
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223 | return 0; |
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224 | } else { |
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225 | |
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226 | inputfile_t *inputfile = readinput(argv[1]); |
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227 | if (inputfile) { |
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228 | printf("<pre>\n"); |
4 | 229 | char *line = (char*) malloc(inputfile->maxlinewidth*64); |
230 | int lnw = lnint(inputfile->count); | |
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231 | for (int i = 0 ; i < inputfile->count ; i++) { |
4 | 232 | parseline(inputfile->lines[i], line); |
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233 | printf("<span class=\"c2html-lineno\">%*d:</span> %s", |
4 | 234 | lnw, i, line); |
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235 | } |
4 | 236 | free(line); |
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237 | printf("</pre>\n"); |
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238 | freeinputfilebuffer(inputfile); |
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239 | } |
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240 | |
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241 | return 0; |
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242 | } |
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243 | } |
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244 |