1 /* $Header: /p/tcsh/cvsroot/tcsh/gethost.c,v 1.19 2014/03/09 00:11:54 christos Exp $ */
3 * gethost.c: Create version file from prototype
6 * Copyright (c) 1980, 1991 The Regents of the University of California.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 RCSID("$tcsh: gethost.c,v 1.19 2014/03/09 00:11:54 christos Exp $")
38 # define perror __perror
39 # define rename __rename
40 # define getopt __getopt
41 # define system __system
53 #define ISSPACE(p) (isspace((unsigned char) (p)) && (p) != '\n')
56 * We cannot do that, because some compilers like #line and others
58 * #define LINEDIRECTIVE
61 static const char *keyword[] =
92 static int findtoken (char *);
93 static char *gettoken (char **, char *);
96 int main (int, char *[]);
99 * Return the token number of the given token
106 if (ptr == NULL || *ptr == '\0')
109 for (i = 0; keyword[i] != NULL; i++)
110 if (strcmp(keyword[i], ptr) == 0)
118 * Get : delimited token and remove leading/trailing blanks/newlines
121 gettoken(char **pptr, char *token)
126 for (; *ptr && ISSPACE(*ptr); ptr++)
129 for (; *ptr && *ptr != ':'; *tok++ = *ptr++)
137 for (tok--; tok >= token && *tok && ISSPACE(*tok); tok--)
147 cat(const char *a, const char *b, size_t len)
158 if ((r = malloc(l)) == NULL)
161 snprintf(r, l, "%s%.*s", a, (int)len, b);
163 snprintf(r, l, "%.*s", (int)len, b);
168 explode(const char *defs)
170 static const char def[] = "defined("; /* ) */
173 const char *ptr, *bptr, *eptr = NULL, *name;
175 if (strstr(defs, "#machine(" /* ) */))
177 if (!strstr(defs, def))
182 for (ptr = defs; (bptr = strstr(ptr, def)) != NULL; ptr = eptr + 1) {
184 buf = cat(buf, ptr, bptr - ptr + 1);
185 buf = cat(buf, "(", 0); /* ) */
186 if ((eptr = strchr(ptr + sizeof(def) - 1, ')')) == NULL) {
187 (void) fprintf(stderr, "%s: missing close paren `%s'\n",
192 buf = cat(buf, bptr, eptr - bptr + 1);
193 name = bptr + sizeof(def) - 1;
196 (void) fprintf(stderr, "%s: empty define `%s'\n",
201 if (*name != '_' && (*name != 'M' && name[1] != '_')) {
202 char *undername = malloc(len + 10);
203 if (undername == NULL)
205 buf = cat(buf, ") || defined(", 0);
206 snprintf(undername, len + 10, "__%.*s__)", (int)len,
208 buf = cat(buf, undername, len + 5);
209 buf = cat(buf, ") || defined(", 0);
210 snprintf(undername, len + 10, "__%.*s)", (int)len,
212 buf = cat(buf, undername, len + 3);
214 buf = cat(buf, "))", 0);
217 (void) fprintf(stderr, "%s: invalid input `%s'\n", pname, defs);
220 buf = cat(buf, eptr + 1, 0);
226 main(int argc, char *argv[])
228 char line[INBUFSIZE];
229 const char *fname = "stdin";
231 char defs[INBUFSIZE];
232 char stmt[INBUFSIZE];
239 if ((pname = strrchr(argv[0], '/')) == NULL)
245 (void) fprintf(stderr, "Usage: %s [<filename>]\n", pname);
250 if ((fp = fopen(fname = argv[1], "r")) == NULL) {
251 (void) fprintf(stderr, "%s: Cannot open `%s'\n", pname, fname);
257 while ((ptr = fgets(line, sizeof(line), fp)) != NULL) {
259 switch (token = findtoken(gettoken(&ptr, defs))) {
297 if (gettoken(&ptr, defs) == NULL) {
298 (void) fprintf(stderr, "%s: \"%s\", %d: Missing macro name\n",
299 pname, fname, lineno);
302 if (gettoken(&ptr, stmt) == NULL) {
303 (void) fprintf(stderr, "%s: \"%s\", %d: Missing macro body\n",
304 pname, fname, lineno);
307 (void) fprintf(stdout, "\n#if %s\n# define %s\n#endif\n\n",
308 explode(stmt), defs);
312 if (state != S_CODE && *defs != '\0') {
313 (void) fprintf(stderr, "%s: \"%s\", %d: Discarded\n",
314 pname, fname, lineno);
316 (void) fprintf(stderr, "%s: Too many errors\n", pname);
321 (void) fprintf(stdout, "%s", line);
325 (void) fprintf(stderr, "%s: \"%s\", %d: Unexpected token\n",
326 pname, fname, lineno);
334 (void) fprintf(stdout, "#endif\n");
339 tok = gettoken(&ptr, defs);
340 if (token == T_NEWDEF) {
342 (void) fprintf(stderr, "%s: \"%s\", %d: Missing enddef\n",
343 pname, fname, lineno);
347 (void) fprintf(stderr, "%s: \"%s\", %d: No defs\n",
348 pname, fname, lineno);
351 (void) fprintf(stdout, "\n\n");
353 (void) fprintf(stdout, "# %d \"%s\"\n", lineno + 1, fname);
354 #endif /* LINEDIRECTIVE */
355 (void) fprintf(stdout, "#if (%s)\n", explode(defs));
360 (void) fprintf(stdout, "# if (%s) && !defined(_%s_)\n",
361 explode(defs), keyword[token]);
363 (void) fprintf(stdout, "# if !defined(_%s_)\n",
366 if (gettoken(&ptr, stmt) == NULL) {
367 (void) fprintf(stderr, "%s: \"%s\", %d: No statement\n",
368 pname, fname, lineno);
371 (void) fprintf(stdout, "# define _%s_\n", keyword[token]);
372 (void) fprintf(stdout, " %s = %s;\n", keyword[token], stmt);
373 (void) fprintf(stdout, "# endif\n");
378 if (gettoken(&ptr, defs))
379 (void) fprintf(stdout, " /* %s */\n", defs);
383 if (token == T_NEWCODE) {
385 (void) fprintf(stdout, "# %d \"%s\"\n", lineno + 1, fname);
386 #endif /* LINEDIRECTIVE */
391 (void) fprintf(stderr, "%s: \"%s\", %d: Unexpected state\n",
392 pname, fname, lineno);
398 (void) fprintf(stderr, "%s: \"%s\", %d: Missing enddef\n",
399 pname, fname, lineno);