src/c2html.c@ebbf0776c1bc
src/c2html.c
Fri, 30 Aug 2013 11:23:44 +0200
- author
- Mike Becker <universe@uap-core.de>
- date
- Fri, 30 Aug 2013 11:23:44 +0200
- changeset 20
- ebbf0776c1bc
- parent 19
- 2e812df2b231
- child 21
- 537aec525835
- permissions
- -rw-r--r--
replaced function static variables with struct members
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 64
40 const char* ckeywords[] = {
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",
44 "struct", "switch", "typedef", "union", "unsigned", "void", "volatile",
45 "while", NULL
46 };
48 const char* jkeywords[] = {
49 "abstract", "continue", "for", "new", "switch", "assert", "default", "goto",
50 "package", "synchronized", "boolean", "do", "if", "private", "this",
51 "break", "double", "implements", "protected", "throw", "byte", "else",
52 "import", "public", "throws", "case", "enum", "instanceof", "return",
53 "transient", "catch", "extends", "int", "short", "try", "char", "final",
54 "interface", "static", "void", "class", "finally", "long", "strictfp",
55 "volatile", "const", "float", "native", "super", "while", NULL
56 };
58 #define iswordcharacter(c) (isalnum(c) || c=='_' || c=='#' || c=='@')
60 int isctype(char *word, size_t len) {
61 return (word[len-2] == '_' && word[len-1] == 't');
62 }
64 int iscdirective(char *word) {
65 return (word[0] == '#');
66 }
68 int isjtype(char *word, size_t len) {
69 return isupper(word[0]);
70 }
72 int isjdirective(char *word) {
73 return word[0] == '@';
74 }
76 typedef struct _highlighter_t highlighter_t;
78 struct _highlighter_t {
79 const char** keywords;
80 int(*istype)(char*,size_t);
81 int(*isdirective)(char*);
82 void(*parser)(char*,char*,highlighter_t*);
83 int iscommentml;
84 char word[WORDBUF_SIZE];
85 char includefile[FILENAME_MAX];
86 };
88 typedef struct {
89 char* outfilename;
90 char* infilename;
91 int highlight;
92 } settings_t;
94 typedef struct {
95 size_t count;
96 size_t capacity;
97 size_t maxlinewidth;
98 char** lines;
99 } inputfile_t;
101 inputfile_t *inputfilebuffer(size_t capacity) {
102 inputfile_t *inputfile = (inputfile_t*) malloc(sizeof(inputfile_t));
103 inputfile->lines = (char**) malloc(capacity * sizeof(char*));
104 inputfile->capacity = capacity;
105 inputfile->count = 0;
106 inputfile->maxlinewidth = 0;
108 return inputfile;
109 }
111 void addline(inputfile_t *inputfile, char* line, size_t width) {
112 char *l = (char*) malloc(width+1);
113 memcpy(l, line, width);
114 l[width] = 0;
115 if (inputfile->count >= inputfile->capacity) {
116 inputfile->capacity <<= 1;
117 inputfile->lines = realloc(inputfile->lines, inputfile->capacity);
118 }
119 inputfile->lines[inputfile->count] = l;
120 inputfile->maxlinewidth =
121 width > inputfile->maxlinewidth ? width : inputfile->maxlinewidth;
122 inputfile->count++;
123 }
125 void freeinputfilebuffer(inputfile_t *inputfile) {
126 for (int i = 0 ; i < inputfile->count ; i++) {
127 free(inputfile->lines[i]);
128 }
129 free(inputfile->lines);
130 free(inputfile);
131 }
133 inputfile_t *readinput(char *filename) {
135 int fd = open(filename, O_RDONLY);
136 if (fd == -1) return NULL;
138 inputfile_t *inputfile = inputfilebuffer(512);
140 char buf[INPUTBUF_SIZE];
141 ssize_t r;
143 size_t maxlinewidth = 256;
144 char *line = (char*) malloc(maxlinewidth);
145 size_t col = 0;
147 while ((r = read(fd, buf, INPUTBUF_SIZE)) > 0) {
148 for (size_t i = 0 ; i < r ; i++) {
149 if (col >= maxlinewidth-4) {
150 maxlinewidth <<= 1;
151 line = realloc(line, maxlinewidth);
152 }
154 if (buf[i] == '\n') {
155 line[col++] = '\n';
156 line[col] = 0;
157 addline(inputfile, line, col);
158 col = 0;
159 } else {
160 line[col++] = buf[i];
161 }
162 }
163 }
165 free(line);
167 close(fd);
169 return inputfile;
170 }
172 size_t writeescapedchar(char *dest, size_t dp, char c) {
173 if (c == '>') {
174 dest[dp++] = '&'; dest[dp++] = 'g'; dest[dp++] = 't'; dest[dp++] = ';';
175 } else if (c == '<') {
176 dest[dp++] = '&'; dest[dp++] = 'l'; dest[dp++] = 't'; dest[dp++] = ';';
177 } else {
178 dest[dp++] = c;
179 }
181 return dp;
182 }
184 int iskeyword(char *word, const char** keywords) {
185 for (int i = 0 ; keywords[i] ; i++) {
186 if (strncmp(keywords[i], word, WORDBUF_SIZE) == 0) {
187 return 1;
188 }
189 }
190 return 0;
191 }
193 int iscapsonly(char *word, size_t wp) {
194 for (size_t i = 0 ; i < wp ; i++) {
195 if (!isupper(word[i]) && word[i] != '_') {
196 return 0;
197 }
198 }
199 return 1;
200 }
202 void parseline(char *src, char *dest, highlighter_t *hltr) {
203 hltr->parser(src, dest, hltr);
204 }
206 void cjparseline(char *src, char *dest, highlighter_t *hltr) {
207 size_t sp = 0, dp = 0;
208 /* indent */
209 while (isspace(src[sp])) {
210 dest[dp++] = src[sp++];
211 }
213 memset(hltr->word, 0, WORDBUF_SIZE);
214 size_t wp = 0, ifp = 0;
215 int isstring = 0, iscomment = 0, isinclude = 0, parseinclude = 0;
216 int isescaping = 0;
218 if (hltr->iscommentml) {
219 iscomment = 1;
220 memcpy(&(dest[dp]), "<span class=\"c2html-comment\">", 29);
221 dp += 29;
222 }
224 for (char c = src[sp] ; c ; c=src[++sp]) {
225 /* comments */
226 if (c == '/') {
227 if (hltr->iscommentml && sp > 0 && src[sp-1] == '*') {
228 iscomment = 0;
229 hltr->iscommentml = 0;
230 memcpy(&(dest[dp]), "/</span>", 8);
231 dp += 8;
232 continue;
233 } else if (!iscomment && (src[sp+1] == '/' || src[sp+1] == '*')) {
234 iscomment = 1;
235 hltr->iscommentml = (src[sp+1] == '*');
236 memcpy(&(dest[dp]), "<span class=\"c2html-comment\">", 29);
237 dp += 29;
238 }
239 }
241 if (iscomment) {
242 if (c == '\n') {
243 memcpy(&(dest[dp]), "</span>", 7);
244 dp += 7;
245 }
246 dp = writeescapedchar(dest, dp, c);
247 } else if (isinclude) {
248 if (c == '<') {
249 memcpy(&(dest[dp]), "<span class=\"c2html-stdinclude\">", 32);
250 dp += 32;
251 dp = writeescapedchar(dest, dp, c);
252 } else if (c == '\"') {
253 if (parseinclude) {
254 dest[dp++] = '\"';
255 dest[dp++] = '>';
256 memcpy(&(dest[dp]), hltr->includefile, ifp);
257 dp += ifp;
259 dp = writeescapedchar(dest, dp, c);
260 memcpy(&(dest[dp]), "</a>", 4);
261 dp += 4;
262 parseinclude = 0;
263 } else {
264 memcpy(&(dest[dp]),
265 "<a class=\"c2html-userinclude\" href=", 35);
266 dp += 35;
267 dp = writeescapedchar(dest, dp, c);
268 ifp = 0;
269 hltr->includefile[ifp++] = '\"';
270 parseinclude = 1;
271 }
272 } else if (c == '>') {
273 dp = writeescapedchar(dest, dp, c);
274 memcpy(&(dest[dp]), "</span>", 7);
275 dp += 7;
276 } else {
277 if (parseinclude) {
278 hltr->includefile[ifp++] = c;
279 }
280 dp = writeescapedchar(dest, dp, c);
281 }
282 } else {
283 /* strings */
284 if (!isescaping && (c == '\'' || c == '\"')) {
285 isstring ^= 1;
286 if (isstring) {
287 memcpy(&(dest[dp]), "<span class=\"c2html-string\">", 28);
288 dp += 28;
289 dp = writeescapedchar(dest, dp, c);
290 } else {
291 dp = writeescapedchar(dest, dp, c);
292 memcpy(&(dest[dp]), "</span>", 7);
293 dp += 7;
294 }
295 } else {
296 if (isstring) {
297 dp = writeescapedchar(dest, dp, c);
298 } else if (!iswordcharacter(c)) {
299 /* interpret word int_t */
300 if (wp > 0 && wp < WORDBUF_SIZE) {
301 int closespan = 1;
302 if (iskeyword(hltr->word, hltr->keywords)) {
303 memcpy(&(dest[dp]),
304 "<span class=\"c2html-keyword\">", 29);
305 dp += 29;
306 } else if (hltr->istype(hltr->word, wp)) {
307 memcpy(&(dest[dp]),
308 "<span class=\"c2html-type\">", 26);
309 dp += 26;
310 } else if (hltr->isdirective(hltr->word)) {
311 isinclude = !strncmp(
312 "#include", hltr->word, WORDBUF_SIZE);
313 memcpy(&(dest[dp]),
314 "<span class=\"c2html-directive\">", 31);
315 dp += 31;
316 } else if (iscapsonly(hltr->word, wp)) {
317 memcpy(&(dest[dp]),
318 "<span class=\"c2html-macroconst\">", 32);
319 dp += 32;
320 } else {
321 closespan = 0;
322 }
323 for (int i = 0 ; i < wp ; i++) {
324 dp = writeescapedchar(dest, dp, hltr->word[i]);
325 }
326 if (closespan) {
327 memcpy(&(dest[dp]), "</span>", 7);
328 dp += 7;
329 }
330 }
331 memset(hltr->word, 0, WORDBUF_SIZE);
332 wp = 0;
333 dp = writeescapedchar(dest, dp, c);
334 } else {
335 /* read word */
336 if (wp < WORDBUF_SIZE) {
337 hltr->word[wp++] = c;
338 } else if (wp == WORDBUF_SIZE) {
339 for (int i = 0 ; i < WORDBUF_SIZE ; i++) {
340 dp = writeescapedchar(dest, dp, hltr->word[i]);
341 }
342 wp++;
343 dp = writeescapedchar(dest, dp, c);
344 } else {
345 dp = writeescapedchar(dest, dp, c);
346 }
347 }
348 }
350 isescaping = !isescaping & (c == '\\');
351 }
352 }
353 dest[dp] = 0;
354 }
356 void printhelp() {
357 printf("Formats source code using HTML.\n\nUsage:\n"
358 " c2html [Options] FILE\n\n"
359 " Options:\n"
360 " -h Prints this help message\n"
361 " -j Highlight Java instead of C source code\n"
362 " -o <output> Output file (stdout, if not specified)\n"
363 " -p Disable highlighting (plain text)\n"
364 "\n");
367 }
369 int lnint(size_t lnc) {
370 int w = 1, p = 1;
371 while ((p*=10) < lnc) w++;
372 return w;
373 }
375 int main(int argc, char** argv) {
376 settings_t settings;
377 settings.outfilename = NULL;
378 settings.highlight = 1;
380 highlighter_t highlighter;
381 memset(&highlighter, 0, sizeof(highlighter));
382 highlighter.isdirective = iscdirective;
383 highlighter.istype = isctype;
384 highlighter.keywords = ckeywords;
385 highlighter.parser = cjparseline;
387 char optc;
388 while ((optc = getopt(argc, argv, "hjo:p")) != -1) {
389 switch (optc) {
390 case 'o':
391 if (!(optarg[0] == '-' && optarg[1] == 0)) {
392 settings.outfilename = optarg;
393 }
394 break;
395 case 'j':
396 highlighter.isdirective = isjdirective;
397 highlighter.istype = isjtype;
398 highlighter.keywords = jkeywords;
399 break;
400 case 'p':
401 settings.highlight = 0;
402 break;
403 case 'h':
404 printhelp();
405 return 0;
406 default:
407 return 1;
408 }
409 }
411 if (optind != argc-1) {
412 printhelp();
413 return 1;
414 } else {
415 settings.infilename = argv[optind];
417 inputfile_t *inputfile = readinput(settings.infilename);
418 if (inputfile) {
419 FILE *fout;
420 char *line;
421 if (settings.highlight) {
422 line = (char*) malloc(inputfile->maxlinewidth*64);
423 } else {
424 line = NULL;
425 }
426 if (settings.outfilename) {
427 fout = fopen(settings.outfilename, "w");
428 } else {
429 fout = stdout;
430 }
431 fprintf(fout, "<pre>\n");
432 int lnw = lnint(inputfile->count);
433 for (int i = 0 ; i < inputfile->count ; i++) {
434 if (settings.highlight) {
435 parseline(inputfile->lines[i], line, &highlighter);
436 } else {
437 line = inputfile->lines[i];
438 }
439 fprintf(fout, "<span class=\"c2html-lineno\">%*d:</span> %s",
440 lnw, i+1, line);
441 }
442 if (settings.highlight) {
443 free(line);
444 }
445 fprintf(fout, "</pre>\n");
447 if (fout != stdout) {
448 fclose(fout);
449 }
451 freeinputfilebuffer(inputfile);
452 }
454 return 0;
455 }
456 }
