Wed, 10 Jul 2013 13:38:28 +0200
option for output file
1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2013 Mike Becker. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 */
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33 #include <fcntl.h>
34 #include <unistd.h>
35 #include <ctype.h>
37 #define INPUTBUF_SIZE 2048
38 #define WORDBUF_SIZE 16
40 const char* keywords[] = {
41 "auto", "break", "case", "char", "const", "continue", "default", "do",
42 "double", "else", "enum", "extern", "float", "for", "goto", "if", "int",
43 "long", "register", "return", "short", "signed", "sizeof", "static", "struct",
44 "switch", "typedef", "union", "unsigned", "void", "volatile", "while", NULL
45 };
47 typedef struct {
48 char* outfilename;
49 char* infilename;
50 } settings_t;
52 typedef struct {
53 size_t count;
54 size_t capacity;
55 size_t maxlinewidth;
56 char** lines;
57 } inputfile_t;
59 inputfile_t *inputfilebuffer(size_t capacity) {
60 inputfile_t *inputfile = (inputfile_t*) malloc(sizeof(inputfile_t));
61 inputfile->lines = (char**) malloc(capacity * sizeof(char*));
62 inputfile->capacity = capacity;
63 inputfile->count = 0;
64 inputfile->maxlinewidth = 0;
66 return inputfile;
67 }
69 void addline(inputfile_t *inputfile, char* line, size_t width) {
70 char *l = (char*) malloc(width+1);
71 memcpy(l, line, width);
72 l[width] = 0;
73 if (inputfile->count >= inputfile->capacity) {
74 inputfile->capacity <<= 1;
75 inputfile->lines = realloc(inputfile->lines, inputfile->capacity);
76 }
77 inputfile->lines[inputfile->count] = l;
78 inputfile->maxlinewidth =
79 width > inputfile->maxlinewidth ? width : inputfile->maxlinewidth;
80 inputfile->count++;
81 }
83 void freeinputfilebuffer(inputfile_t *inputfile) {
84 for (int i = 0 ; i < inputfile->count ; i++) {
85 free(inputfile->lines[i]);
86 }
87 free(inputfile->lines);
88 free(inputfile);
89 }
91 inputfile_t *readinput(char *filename) {
93 int fd = open(filename, O_RDONLY);
94 if (fd == -1) return NULL;
96 inputfile_t *inputfile = inputfilebuffer(512);
98 char buf[INPUTBUF_SIZE];
99 ssize_t r;
101 size_t maxlinewidth = 256;
102 char *line = (char*) malloc(maxlinewidth);
103 size_t col = 0;
105 while ((r = read(fd, buf, INPUTBUF_SIZE)) > 0) {
106 for (size_t i = 0 ; i < r ; i++) {
107 if (col >= maxlinewidth-4) {
108 maxlinewidth <<= 1;
109 line = realloc(line, maxlinewidth);
110 }
112 if (buf[i] == '\n') {
113 line[col++] = '\n';
114 line[col] = 0;
115 addline(inputfile, line, col);
116 col = 0;
117 } else {
118 line[col++] = buf[i];
119 }
120 }
121 }
123 free(line);
125 close(fd);
127 return inputfile;
128 }
130 size_t writeescapedchar(char *dest, size_t dp, char c) {
131 if (c == '>') {
132 dest[dp++] = '&'; dest[dp++] = 'g';
133 dest[dp++] = 't'; dest[dp++] = ';';
134 } else if (c == '<') {
135 dest[dp++] = '&'; dest[dp++] = 'l';
136 dest[dp++] = 't'; dest[dp++] = ';';
137 } else {
138 dest[dp++] = c;
139 }
141 return dp;
142 }
144 int iskeyword(char *word) {
145 for (int i = 0 ; keywords[i] ; i++) {
146 if (strncmp(keywords[i], word, WORDBUF_SIZE) == 0) {
147 return 1;
148 }
149 }
150 return 0;
151 }
153 #define istype(word, len) (word[len-2] == '_' && word[len-1] == 't')
155 void parseline(char *src, char *dest) {
156 size_t sp = 0, dp = 0;
157 /* indent */
158 while (isspace(src[sp])) {
159 dest[dp++] = src[sp++];
160 }
161 char word[WORDBUF_SIZE];
162 memset(word, 0, WORDBUF_SIZE);
163 size_t wp = 0;
164 int closespan;
165 for (char c = src[sp] ; c ; c=src[++sp]) {
166 if (!isalnum(c) && c != '_') {
167 /* interpret word int_t */
168 if (wp > 0 && wp < WORDBUF_SIZE) {
169 if (iskeyword(word)) {
170 memcpy(&(dest[dp]), "<span class=\"c2html-keyword\">", 29);
171 dp += 29;
172 closespan = 1;
173 } else if (istype(word, wp)) {
174 memcpy(&(dest[dp]), "<span class=\"c2html-type\">", 26);
175 dp += 26;
176 closespan = 1;
177 } else {
178 closespan = 0;
179 }
180 for (int i = 0 ; i < wp ; i++) {
181 dp = writeescapedchar(dest, dp, word[i]);
182 }
183 if (closespan) {
184 memcpy(&(dest[dp]), "</span>", 7);
185 dp += 7;
186 }
187 memset(word, 0, WORDBUF_SIZE);
188 wp = 0;
189 }
190 dp = writeescapedchar(dest, dp, c);
191 } else {
192 /* read word */
193 if (wp < WORDBUF_SIZE) {
194 word[wp++] = c;
195 } else if (wp == WORDBUF_SIZE) {
196 for (int i = 0 ; i < WORDBUF_SIZE ; i++) {
197 dp = writeescapedchar(dest, dp, word[i]);
198 }
199 wp++;
200 dp = writeescapedchar(dest, dp, c);
201 } else {
202 dp = writeescapedchar(dest, dp, c);
203 }
204 }
205 }
206 dest[dp] = 0;
207 }
209 void printhelp() {
210 printf("Formats source code using HTML.\n\nUsage:\n"
211 " c2html [Options] FILE\n\n"
212 " Options:\n"
213 " -h Prints this help message\n"
214 " -o <output> Output file (if not specified, stdout is used)\n"
215 "\n");
218 }
220 int lnint(size_t lnc) {
221 int w = 1, p = 1;
222 while ((p*=10) < lnc) w++;
223 return w;
224 }
226 int main(int argc, char** argv) {
228 settings_t settings;
229 settings.outfilename = NULL;
231 char optc;
232 while ((optc = getopt(argc, argv, "ho:")) != -1) {
233 switch (optc) {
234 case 'o':
235 if (!(optarg[0] == '-' && optarg[1] == 0)) {
236 settings.outfilename = optarg;
237 }
238 break;
239 case 'h':
240 printhelp();
241 return 0;
242 default:
243 return 1;
244 }
245 }
247 if (optind != argc-1) {
248 printhelp();
249 return 1;
250 } else {
251 settings.infilename = argv[optind];
253 inputfile_t *inputfile = readinput(settings.infilename);
254 if (inputfile) {
255 FILE *fout;
256 if (settings.outfilename) {
257 fout = fopen(settings.outfilename, "w");
258 } else {
259 fout = stdout;
260 }
261 fprintf(fout, "<pre>\n");
262 char *line = (char*) malloc(inputfile->maxlinewidth*64);
263 int lnw = lnint(inputfile->count);
264 for (int i = 0 ; i < inputfile->count ; i++) {
265 parseline(inputfile->lines[i], line);
266 fprintf(fout, "<span class=\"c2html-lineno\">%*d:</span> %s",
267 lnw, i, line);
268 }
269 free(line);
270 fprintf(fout, "</pre>\n");
272 if (fout != stdout) {
273 fclose(fout);
274 }
276 freeinputfilebuffer(inputfile);
277 }
279 return 0;
280 }
281 }