src/c2html.c

Fri, 24 May 2013 13:35:06 +0200

author
Mike Becker <universe@uap-core.de>
date
Fri, 24 May 2013 13:35:06 +0200
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parent 0
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child 2
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permissions
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first prototype: creates unformatted output with line numbers

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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>
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35 #include "c2html.h"
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36
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37 inputfile_t *inputfilebuffer(size_t capacity) {
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38 inputfile_t *inputfile = (inputfile_t*) malloc(sizeof(inputfile_t));
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39 inputfile->lines = (char**) malloc(capacity * sizeof(char*));
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40 inputfile->capacity = capacity;
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41 inputfile->count = 0;
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42
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43 return inputfile;
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44 }
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45
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46 void addline(inputfile_t *inputfile, char* line, size_t width) {
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47 char *l = (char*) malloc(width+1);
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48 memcpy(l, line, width);
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49 l[width] = 0;
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50 if (inputfile->count >= inputfile->capacity) {
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51 inputfile->capacity <<= 1;
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52 inputfile->lines = realloc(inputfile->lines, inputfile->capacity);
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53 }
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54 inputfile->lines[inputfile->count] = l;
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55 inputfile->count++;
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56 }
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57
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58 void freeinputfilebuffer(inputfile_t *inputfile) {
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59 for (int i = 0 ; i < inputfile->count ; i++) {
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60 free(inputfile->lines[i]);
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61 }
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62 free(inputfile->lines);
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63 free(inputfile);
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64 }
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65
1
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66 inputfile_t *readinput(char *filename) {
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67
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68 int fd = open(filename, O_RDONLY);
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69 if (fd == -1) return NULL;
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70
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71 inputfile_t *inputfile = inputfilebuffer(512);
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72
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73 const size_t bufsize = 1024;
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74 char buf[bufsize];
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75 ssize_t r;
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76
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77 size_t maxlinewidth = 80;
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78 char *line = (char*) malloc(maxlinewidth);
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79 size_t col = 0;
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80
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81 while ((r = read(fd, buf, bufsize)) > 0) {
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82 for (size_t i = 0 ; i < r ; i++) {
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83 if (col >= maxlinewidth-4) {
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84 maxlinewidth <<= 1;
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85 line = realloc(line, maxlinewidth);
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86 }
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87
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88 if (buf[i] == '\n') {
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89 line[col] = 0;
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90 addline(inputfile, line, col);
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91 col = 0;
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92 } else if (buf[i] == '<') {
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93 line[col++] = '&'; line[col++] = 'l';
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94 line[col++] = 't'; line[col++] = ';';
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95 } else if (buf[i] == '>') {
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96 line[col++] = '&'; line[col++] = 'g';
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97 line[col++] = 't'; line[col++] = ';';
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98 } else {
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99 line[col++] = buf[i];
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100 }
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101 }
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102 }
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103
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104 free(line);
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105
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106 close(fd);
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107
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108 return inputfile;
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109 }
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110
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111 void printhelp() {
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112 printf("Formats source code using HTML.\n\nUsage:\n"
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113 " c2html [FILE...]"
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114 "\n");
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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 int lnw(size_t lnc) {
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120 int w = 1, p = 1;
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121 while ((p*=10) < lnc) w++;
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122 return w;
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123 }
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124
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125 int main(int argc, char** argv) {
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126
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127 if (argc == 1) {
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128 printhelp();
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129 return 0;
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130 } else {
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131
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132 inputfile_t *inputfile = readinput(argv[1]);
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133 if (inputfile) {
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134 printf("<pre>\n");
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135 for (int i = 0 ; i < inputfile->count ; i++) {
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136 printf("%*d: %s\n", lnw(inputfile->count),
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137 i, inputfile->lines[i]);
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138 }
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139 printf("</pre>\n");
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140 freeinputfilebuffer(inputfile);
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141 }
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142
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143 return 0;
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144 }
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145 }
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Mike Becker <universe@uap-core.de>
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mercurial