1 /*
2 * gethost.c: Create version file from prototype
3 */
4 /*-
5 * Copyright (c) 1980, 1991 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32 #include "sh.h"
33
34 #ifdef SCO
35 # define perror __perror
36 # define rename __rename
37 # define getopt __getopt
38 # define system __system
39 #endif
40 #include <stdio.h>
41 #ifdef SCO
42 # undef perror
43 # undef rename
44 # undef getopt
45 # undef system
46 #endif
47
48 #include <ctype.h>
49
50 #define ISSPACE(p) (isspace((unsigned char) (p)) && (p) != '\n')
51
52 /*
53 * We cannot do that, because some compilers like #line and others
54 * like # <lineno>
55 * #define LINEDIRECTIVE
56 */
57
58 static const char *keyword[] =
59 {
60 "vendor",
61 #define T_VENDOR 0
62 "hosttype",
63 #define T_HOSTTYPE 1
64 "machtype",
65 #define T_MACHTYPE 2
66 "ostype",
67 #define T_OSTYPE 3
68 "newdef",
69 #define T_NEWDEF 4
70 "enddef",
71 #define T_ENDDEF 5
72 "newcode",
73 #define T_NEWCODE 6
74 "endcode",
75 #define T_ENDCODE 7
76 "comment",
77 #define T_COMMENT 8
78 "macro",
79 #define T_MACRO 9
80 NULL
81 #define T_NONE 10
82 };
83
84 #define S_DISCARD 0
85 #define S_COMMENT 1
86 #define S_CODE 2
87 #define S_KEYWORD 3
88
89 static int findtoken (char *);
90 static char *gettoken (char **, char *);
91 static char *pname;
92
93 int main (int, char *[]);
94
95 /* findtoken():
96 * Return the token number of the given token
97 */
98 static int
findtoken(char * ptr)99 findtoken(char *ptr)
100 {
101 int i;
102
103 if (ptr == NULL || *ptr == '\0')
104 return T_NONE;
105
106 for (i = 0; keyword[i] != NULL; i++)
107 if (strcmp(keyword[i], ptr) == 0)
108 return i;
109
110 return T_NONE;
111 }
112
113
114 /* gettoken():
115 * Get : delimited token and remove leading/trailing blanks/newlines
116 */
117 static char *
gettoken(char ** pptr,char * token)118 gettoken(char **pptr, char *token)
119 {
120 char *ptr = *pptr;
121 char *tok = token;
122
123 for (; *ptr && ISSPACE(*ptr); ptr++)
124 continue;
125
126 for (; *ptr && *ptr != ':'; *tok++ = *ptr++)
127 continue;
128
129 if (*ptr == ':')
130 ptr++;
131 else
132 tok--;
133
134 for (tok--; tok >= token && *tok && ISSPACE(*tok); tok--)
135 continue;
136
137 *++tok = '\0';
138
139 *pptr = ptr;
140 return token;
141 }
142
143 static char *
cat(const char * a,const char * b,size_t len)144 cat(const char *a, const char *b, size_t len)
145 {
146 size_t l;
147 char *r;
148
149 if (len == 0)
150 len = strlen(b) + 1;
151 if (a)
152 l = strlen(a) + len;
153 else
154 l = len;
155 if ((r = malloc(l)) == NULL)
156 abort();
157 if (a)
158 snprintf(r, l, "%s%.*s", a, (int)len, b);
159 else
160 snprintf(r, l, "%.*s", (int)len, b);
161 return r;
162 }
163
164 static const char *
explode(const char * defs)165 explode(const char *defs)
166 {
167 static const char def[] = "defined("; /* ) */
168 static char *buf;
169 size_t len;
170 const char *ptr, *bptr, *eptr = NULL, *name;
171
172 if (strstr(defs, "#machine(" /* ) */))
173 return defs;
174 if (!strstr(defs, def))
175 return defs;
176
177 free(buf);
178 buf = NULL;
179 for (ptr = defs; (bptr = strstr(ptr, def)) != NULL; ptr = eptr + 1) {
180 if (ptr != bptr)
181 buf = cat(buf, ptr, bptr - ptr + 1);
182 buf = cat(buf, "(", 0); /* ) */
183 if ((eptr = strchr(ptr + sizeof(def) - 1, ')')) == NULL) {
184 (void) fprintf(stderr, "%s: missing close paren `%s'\n",
185 pname, defs);
186 free(buf);
187 return defs;
188 }
189 buf = cat(buf, bptr, eptr - bptr + 1);
190 name = bptr + sizeof(def) - 1;
191 len = eptr - name;
192 if (len < 1) {
193 (void) fprintf(stderr, "%s: empty define `%s'\n",
194 pname, defs);
195 free(buf);
196 return defs;
197 }
198 if (*name != '_' && (*name != 'M' && name[1] != '_')) {
199 char *undername = malloc(len + 10);
200 if (undername == NULL)
201 abort();
202 buf = cat(buf, ") || defined(", 0);
203 snprintf(undername, len + 10, "__%.*s__)", (int)len,
204 name);
205 buf = cat(buf, undername, len + 5);
206 buf = cat(buf, ") || defined(", 0);
207 snprintf(undername, len + 10, "__%.*s)", (int)len,
208 name);
209 buf = cat(buf, undername, len + 3);
210 }
211 buf = cat(buf, "))", 0);
212 }
213 if (!eptr) {
214 (void) fprintf(stderr, "%s: invalid input `%s'\n", pname, defs);
215 return defs;
216 }
217 buf = cat(buf, eptr + 1, 0);
218 return buf;
219 }
220
221
222 int
main(int argc,char * argv[])223 main(int argc, char *argv[])
224 {
225 char line[INBUFSIZE];
226 const char *fname = "stdin";
227 char *ptr, *tok;
228 char defs[INBUFSIZE];
229 char stmt[INBUFSIZE];
230 FILE *fp = stdin;
231 int lineno = 0;
232 int inprocess = 0;
233 int token, state;
234 int errs = 0;
235
236 if ((pname = strrchr(argv[0], '/')) == NULL)
237 pname = argv[0];
238 else
239 pname++;
240
241 if (argc > 2) {
242 (void) fprintf(stderr, "Usage: %s [<filename>]\n", pname);
243 return 1;
244 }
245
246 if (argc == 2)
247 if ((fp = fopen(fname = argv[1], "r")) == NULL) {
248 (void) fprintf(stderr, "%s: Cannot open `%s'\n", pname, fname);
249 return 1;
250 }
251
252 state = S_DISCARD;
253
254 while ((ptr = fgets(line, sizeof(line), fp)) != NULL) {
255 lineno++;
256 switch (token = findtoken(gettoken(&ptr, defs))) {
257 case T_NEWCODE:
258 state = S_CODE;
259 break;
260
261 case T_ENDCODE:
262 state = S_DISCARD;
263 break;
264
265 case T_COMMENT:
266 state = S_COMMENT;
267 break;
268
269 case T_NEWDEF:
270 state = S_KEYWORD;
271 break;
272
273 case T_ENDDEF:
274 state = S_DISCARD;
275 break;
276
277 case T_VENDOR:
278 state = S_KEYWORD;
279 break;
280
281 case T_HOSTTYPE:
282 state = S_KEYWORD;
283 break;
284
285 case T_MACHTYPE:
286 state = S_KEYWORD;
287 break;
288
289 case T_OSTYPE:
290 state = S_KEYWORD;
291 break;
292
293 case T_MACRO:
294 if (gettoken(&ptr, defs) == NULL) {
295 (void) fprintf(stderr, "%s: \"%s\", %d: Missing macro name\n",
296 pname, fname, lineno);
297 break;
298 }
299 if (gettoken(&ptr, stmt) == NULL) {
300 (void) fprintf(stderr, "%s: \"%s\", %d: Missing macro body\n",
301 pname, fname, lineno);
302 break;
303 }
304 (void) fprintf(stdout, "\n#if %s\n# define %s\n#endif\n\n",
305 explode(stmt), defs);
306 break;
307
308 case T_NONE:
309 if (state != S_CODE && *defs != '\0') {
310 (void) fprintf(stderr, "%s: \"%s\", %d: Discarded\n",
311 pname, fname, lineno);
312 if (++errs == 30) {
313 (void) fprintf(stderr, "%s: Too many errors\n", pname);
314 return 1;
315 }
316 break;
317 }
318 (void) fprintf(stdout, "%s", line);
319 break;
320
321 default:
322 (void) fprintf(stderr, "%s: \"%s\", %d: Unexpected token\n",
323 pname, fname, lineno);
324 return 1;
325 }
326
327 switch (state) {
328 case S_DISCARD:
329 if (inprocess) {
330 inprocess = 0;
331 (void) fprintf(stdout, "#endif\n");
332 }
333 break;
334
335 case S_KEYWORD:
336 tok = gettoken(&ptr, defs);
337 if (token == T_NEWDEF) {
338 if (inprocess) {
339 (void) fprintf(stderr, "%s: \"%s\", %d: Missing enddef\n",
340 pname, fname, lineno);
341 return 1;
342 }
343 if (tok == NULL) {
344 (void) fprintf(stderr, "%s: \"%s\", %d: No defs\n",
345 pname, fname, lineno);
346 return 1;
347 }
348 (void) fprintf(stdout, "\n\n");
349 #ifdef LINEDIRECTIVE
350 (void) fprintf(stdout, "# %d \"%s\"\n", lineno + 1, fname);
351 #endif /* LINEDIRECTIVE */
352 (void) fprintf(stdout, "#if (%s)\n", explode(defs));
353 inprocess = 1;
354 }
355 else {
356 if (tok && *tok)
357 (void) fprintf(stdout, "# if (%s) && !defined(_%s_)\n",
358 explode(defs), keyword[token]);
359 else
360 (void) fprintf(stdout, "# if !defined(_%s_)\n",
361 keyword[token]);
362
363 if (gettoken(&ptr, stmt) == NULL) {
364 (void) fprintf(stderr, "%s: \"%s\", %d: No statement\n",
365 pname, fname, lineno);
366 return 1;
367 }
368 (void) fprintf(stdout, "# define _%s_\n", keyword[token]);
369 (void) fprintf(stdout, " %s = %s;\n", keyword[token], stmt);
370 (void) fprintf(stdout, "# endif\n");
371 }
372 break;
373
374 case S_COMMENT:
375 if (gettoken(&ptr, defs))
376 (void) fprintf(stdout, " /* %s */\n", defs);
377 break;
378
379 case S_CODE:
380 if (token == T_NEWCODE) {
381 #ifdef LINEDIRECTIVE
382 (void) fprintf(stdout, "# %d \"%s\"\n", lineno + 1, fname);
383 #endif /* LINEDIRECTIVE */
384 }
385 break;
386
387 default:
388 (void) fprintf(stderr, "%s: \"%s\", %d: Unexpected state\n",
389 pname, fname, lineno);
390 return 1;
391 }
392 }
393
394 if (inprocess) {
395 (void) fprintf(stderr, "%s: \"%s\", %d: Missing enddef\n",
396 pname, fname, lineno);
397 return 1;
398 }
399
400 if (fp != stdin)
401 (void) fclose(fp);
402
403 return 0;
404 }
405