Fri, 21 Jun 2013 12:27:45 +0200
comments
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 #define istype(word, len) (word[len-2] == '_' && word[len-1] == 't')
41 #define isdirective(word) (word[0] == '#')
43 const char* keywords[] = {
44 "auto", "break", "case", "char", "const", "continue", "default", "do",
45 "double", "else", "enum", "extern", "float", "for", "goto", "if", "int",
46 "long", "register", "return", "short", "signed", "sizeof", "static", "struct",
47 "switch", "typedef", "union", "unsigned", "void", "volatile", "while", NULL
48 };
51 typedef struct {
52 size_t count;
53 size_t capacity;
54 size_t maxlinewidth;
55 char** lines;
56 } inputfile_t;
58 inputfile_t *inputfilebuffer(size_t capacity) {
59 inputfile_t *inputfile = (inputfile_t*) malloc(sizeof(inputfile_t));
60 inputfile->lines = (char**) malloc(capacity * sizeof(char*));
61 inputfile->capacity = capacity;
62 inputfile->count = 0;
63 inputfile->maxlinewidth = 0;
65 return inputfile;
66 }
68 void addline(inputfile_t *inputfile, char* line, size_t width) {
69 char *l = (char*) malloc(width+1);
70 memcpy(l, line, width);
71 l[width] = 0;
72 if (inputfile->count >= inputfile->capacity) {
73 inputfile->capacity <<= 1;
74 inputfile->lines = realloc(inputfile->lines, inputfile->capacity);
75 }
76 inputfile->lines[inputfile->count] = l;
77 inputfile->maxlinewidth =
78 width > inputfile->maxlinewidth ? width : inputfile->maxlinewidth;
79 inputfile->count++;
80 }
82 void freeinputfilebuffer(inputfile_t *inputfile) {
83 for (int i = 0 ; i < inputfile->count ; i++) {
84 free(inputfile->lines[i]);
85 }
86 free(inputfile->lines);
87 free(inputfile);
88 }
90 inputfile_t *readinput(char *filename) {
92 int fd = open(filename, O_RDONLY);
93 if (fd == -1) return NULL;
95 inputfile_t *inputfile = inputfilebuffer(512);
97 char buf[INPUTBUF_SIZE];
98 ssize_t r;
100 size_t maxlinewidth = 256;
101 char *line = (char*) malloc(maxlinewidth);
102 size_t col = 0;
104 while ((r = read(fd, buf, INPUTBUF_SIZE)) > 0) {
105 for (size_t i = 0 ; i < r ; i++) {
106 if (col >= maxlinewidth-4) {
107 maxlinewidth <<= 1;
108 line = realloc(line, maxlinewidth);
109 }
111 if (buf[i] == '\n') {
112 line[col++] = '\n';
113 line[col] = 0;
114 addline(inputfile, line, col);
115 col = 0;
116 } else {
117 line[col++] = buf[i];
118 }
119 }
120 }
122 free(line);
124 close(fd);
126 return inputfile;
127 }
129 size_t writeescapedchar(char *dest, size_t dp, char c) {
130 if (c == '>') {
131 dest[dp++] = '&'; dest[dp++] = 'g';
132 dest[dp++] = 't'; dest[dp++] = ';';
133 } else if (c == '<') {
134 dest[dp++] = '&'; dest[dp++] = 'l';
135 dest[dp++] = 't'; dest[dp++] = ';';
136 } else {
137 dest[dp++] = c;
138 }
140 return dp;
141 }
143 int iskeyword(char *word) {
144 for (int i = 0 ; keywords[i] ; i++) {
145 if (strncmp(keywords[i], word, WORDBUF_SIZE) == 0) {
146 return 1;
147 }
148 }
149 return 0;
150 }
152 void parseline(char *src, char *dest) {
153 size_t sp = 0, dp = 0;
154 /* indent */
155 while (isspace(src[sp])) {
156 dest[dp++] = src[sp++];
157 }
158 char word[WORDBUF_SIZE];
159 memset(word, 0, WORDBUF_SIZE);
160 size_t wp = 0;
161 int isstring = 0, iscomment = 0;
162 static int iscommentml;
163 int isescaping = 0;
165 if (iscommentml) {
166 iscomment = 1;
167 memcpy(&(dest[dp]), "<span class=\"c2html-comment\">", 29);
168 dp += 29;
169 }
170 // a fucking /* comment */
171 /* again // / */
172 for (char c = src[sp] ; c ; c=src[++sp]) {
173 /* comments */
174 if (c == '/') {
175 if (iscommentml && sp > 0 && src[sp-1] == '*') {
176 iscomment = 0;
177 iscommentml = 0;
178 memcpy(&(dest[dp]), "/</span>", 8);
179 dp += 8;
180 continue;
181 } else if (!iscomment && (src[sp+1] == '/' || src[sp+1] == '*')) {
182 iscomment = 1;
183 iscommentml = (src[sp+1] == '*');
184 memcpy(&(dest[dp]), "<span class=\"c2html-comment\">", 29);
185 dp += 29;
186 }
187 }
189 if (iscomment) {
190 if (c == '\n') {
191 memcpy(&(dest[dp]), "</span>", 7);
192 dp += 7;
193 }
194 dp = writeescapedchar(dest, dp, c);
195 } else {
196 /* strings */
197 if (!isescaping && (c == '\'' || c == '\"')) {
198 isstring ^= 1;
199 if (isstring) {
200 memcpy(&(dest[dp]), "<span class=\"c2html-string\">", 28);
201 dp += 28;
202 dp = writeescapedchar(dest, dp, c);
203 } else {
204 dp = writeescapedchar(dest, dp, c);
205 memcpy(&(dest[dp]), "</span>", 7);
206 dp += 7;
207 }
208 } else {
209 if (isstring) {
210 dp = writeescapedchar(dest, dp, c);
211 } else if (!isalnum(c) && c != '_' && c != '#') {
212 /* interpret word int_t */
213 if (wp > 0 && wp < WORDBUF_SIZE) {
214 int closespan = 1;
215 if (iskeyword(word)) {
216 memcpy(&(dest[dp]), "<span class=\"c2html-keyword\">", 29);
217 dp += 29;
218 } else if (istype(word, wp)) {
219 memcpy(&(dest[dp]), "<span class=\"c2html-type\">", 26);
220 dp += 26;
221 } else if (isdirective(word)) {
222 memcpy(&(dest[dp]), "<span class=\"c2html-directive\">", 31);
223 dp += 31;
224 } else {
225 closespan = 0;
226 }
227 for (int i = 0 ; i < wp ; i++) {
228 dp = writeescapedchar(dest, dp, word[i]);
229 }
230 if (closespan) {
231 memcpy(&(dest[dp]), "</span>", 7);
232 dp += 7;
233 }
234 memset(word, 0, WORDBUF_SIZE);
235 wp = 0;
236 }
237 dp = writeescapedchar(dest, dp, c);
238 } else {
239 /* read word */
240 if (wp < WORDBUF_SIZE) {
241 word[wp++] = c;
242 } else if (wp == WORDBUF_SIZE) {
243 for (int i = 0 ; i < WORDBUF_SIZE ; i++) {
244 dp = writeescapedchar(dest, dp, word[i]);
245 }
246 wp++;
247 dp = writeescapedchar(dest, dp, c);
248 } else {
249 dp = writeescapedchar(dest, dp, c);
250 }
251 }
252 }
254 isescaping = !isescaping & (c == '\\');
255 }
256 }
257 dest[dp] = 0;
258 }
260 void printhelp() {
261 printf("Formats source code using HTML.\n\nUsage:\n"
262 " c2html [FILE...]"
263 "\n");
266 }
268 int lnint(size_t lnc) {
269 int w = 1, p = 1;
270 while ((p*=10) < lnc) w++;
271 return w;
272 }
274 int main(int argc, char** argv) {
276 if (argc == 1) {
277 printhelp();
278 return 0;
279 } else {
281 inputfile_t *inputfile = readinput(argv[1]);
282 if (inputfile) {
283 printf("<pre>\n");
284 char *line = (char*) malloc(inputfile->maxlinewidth*64);
285 int lnw = lnint(inputfile->count);
286 for (int i = 0 ; i < inputfile->count ; i++) {
287 parseline(inputfile->lines[i], line);
288 printf("<span class=\"c2html-lineno\">%*d:</span> %s",
289 lnw, i, line);
290 }
291 free(line);
292 printf("</pre>\n");
293 freeinputfilebuffer(inputfile);
294 }
296 return 0;
297 }
298 }