2 * gethost.c: Create version file from prototype
5 * Copyright (c) 1980, 1991 The Regents of the University of California.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
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25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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35 # define perror __perror
36 # define rename __rename
37 # define getopt __getopt
38 # define system __system
50 #define ISSPACE(p) (isspace((unsigned char) (p)) && (p) != '\n')
53 * We cannot do that, because some compilers like #line and others
55 * #define LINEDIRECTIVE
58 static const char *keyword[] =
89 static int findtoken (char *);
90 static char *gettoken (char **, char *);
93 int main (int, char *[]);
96 * Return the token number of the given token
103 if (ptr == NULL || *ptr == '\0')
106 for (i = 0; keyword[i] != NULL; i++)
107 if (strcmp(keyword[i], ptr) == 0)
115 * Get : delimited token and remove leading/trailing blanks/newlines
118 gettoken(char **pptr, char *token)
123 for (; *ptr && ISSPACE(*ptr); ptr++)
126 for (; *ptr && *ptr != ':'; *tok++ = *ptr++)
134 for (tok--; tok >= token && *tok && ISSPACE(*tok); tok--)
144 cat(const char *a, const char *b, size_t len)
155 if ((r = malloc(l)) == NULL)
158 snprintf(r, l, "%s%.*s", a, (int)len, b);
160 snprintf(r, l, "%.*s", (int)len, b);
165 explode(const char *defs)
167 static const char def[] = "defined("; /* ) */
170 const char *ptr, *bptr, *eptr = NULL, *name;
172 if (strstr(defs, "#machine(" /* ) */))
174 if (!strstr(defs, def))
179 for (ptr = defs; (bptr = strstr(ptr, def)) != NULL; ptr = eptr + 1) {
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",
189 buf = cat(buf, bptr, eptr - bptr + 1);
190 name = bptr + sizeof(def) - 1;
193 (void) fprintf(stderr, "%s: empty define `%s'\n",
198 if (*name != '_' && (*name != 'M' && name[1] != '_')) {
199 char *undername = malloc(len + 10);
200 if (undername == NULL)
202 buf = cat(buf, ") || defined(", 0);
203 snprintf(undername, len + 10, "__%.*s__)", (int)len,
205 buf = cat(buf, undername, len + 5);
206 buf = cat(buf, ") || defined(", 0);
207 snprintf(undername, len + 10, "__%.*s)", (int)len,
209 buf = cat(buf, undername, len + 3);
211 buf = cat(buf, "))", 0);
214 (void) fprintf(stderr, "%s: invalid input `%s'\n", pname, defs);
217 buf = cat(buf, eptr + 1, 0);
223 main(int argc, char *argv[])
225 char line[INBUFSIZE];
226 const char *fname = "stdin";
228 char defs[INBUFSIZE];
229 char stmt[INBUFSIZE];
236 if ((pname = strrchr(argv[0], '/')) == NULL)
242 (void) fprintf(stderr, "Usage: %s [<filename>]\n", pname);
247 if ((fp = fopen(fname = argv[1], "r")) == NULL) {
248 (void) fprintf(stderr, "%s: Cannot open `%s'\n", pname, fname);
254 while ((ptr = fgets(line, sizeof(line), fp)) != NULL) {
256 switch (token = findtoken(gettoken(&ptr, defs))) {
294 if (gettoken(&ptr, defs) == NULL) {
295 (void) fprintf(stderr, "%s: \"%s\", %d: Missing macro name\n",
296 pname, fname, lineno);
299 if (gettoken(&ptr, stmt) == NULL) {
300 (void) fprintf(stderr, "%s: \"%s\", %d: Missing macro body\n",
301 pname, fname, lineno);
304 (void) fprintf(stdout, "\n#if %s\n# define %s\n#endif\n\n",
305 explode(stmt), defs);
309 if (state != S_CODE && *defs != '\0') {
310 (void) fprintf(stderr, "%s: \"%s\", %d: Discarded\n",
311 pname, fname, lineno);
313 (void) fprintf(stderr, "%s: Too many errors\n", pname);
318 (void) fprintf(stdout, "%s", line);
322 (void) fprintf(stderr, "%s: \"%s\", %d: Unexpected token\n",
323 pname, fname, lineno);
331 (void) fprintf(stdout, "#endif\n");
336 tok = gettoken(&ptr, defs);
337 if (token == T_NEWDEF) {
339 (void) fprintf(stderr, "%s: \"%s\", %d: Missing enddef\n",
340 pname, fname, lineno);
344 (void) fprintf(stderr, "%s: \"%s\", %d: No defs\n",
345 pname, fname, lineno);
348 (void) fprintf(stdout, "\n\n");
350 (void) fprintf(stdout, "# %d \"%s\"\n", lineno + 1, fname);
351 #endif /* LINEDIRECTIVE */
352 (void) fprintf(stdout, "#if (%s)\n", explode(defs));
357 (void) fprintf(stdout, "# if (%s) && !defined(_%s_)\n",
358 explode(defs), keyword[token]);
360 (void) fprintf(stdout, "# if !defined(_%s_)\n",
363 if (gettoken(&ptr, stmt) == NULL) {
364 (void) fprintf(stderr, "%s: \"%s\", %d: No statement\n",
365 pname, fname, lineno);
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");
375 if (gettoken(&ptr, defs))
376 (void) fprintf(stdout, " /* %s */\n", defs);
380 if (token == T_NEWCODE) {
382 (void) fprintf(stdout, "# %d \"%s\"\n", lineno + 1, fname);
383 #endif /* LINEDIRECTIVE */
388 (void) fprintf(stderr, "%s: \"%s\", %d: Unexpected state\n",
389 pname, fname, lineno);
395 (void) fprintf(stderr, "%s: \"%s\", %d: Missing enddef\n",
396 pname, fname, lineno);