Commit | Line | Data |
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97abc6ad HM |
1 | /* munchconfig.c |
2 | ||
3 | A very, very (very!) simple program to process a config_h.sh file on | |
4 | non-unix systems. | |
5 | ||
6 | usage: | |
b8df70f4 | 7 | munchconfig config.sh config_h.sh [-f file] [foo=bar [baz=xyzzy [...]]] >config.h |
97abc6ad | 8 | |
b8df70f4 CB |
9 | which is to say, it takes as its first parameter a config.sh (or |
10 | equivalent), as its second a config_h.sh (or equivalent), an optional file | |
11 | containing tag=value pairs (one on each line), and an optional list of | |
12 | tag=value pairs on the command line. | |
97abc6ad HM |
13 | |
14 | It spits the processed config.h out to STDOUT. | |
15 | ||
16 | */ | |
17 | ||
18 | #include <stdio.h> | |
19 | #include <errno.h> | |
20 | #include <stdlib.h> | |
21 | #include <string.h> | |
22 | #include <ctype.h> | |
b8df70f4 | 23 | #include <unistd.h> |
97abc6ad HM |
24 | |
25 | /* The failure code to exit with */ | |
26 | #ifndef EXIT_FAILURE | |
27 | #ifdef VMS | |
28 | #define EXIT_FAILURE 0 | |
29 | #else | |
30 | #define EXIT_FAILURE -1 | |
31 | #endif | |
32 | #endif | |
33 | ||
34 | /* The biggest line we can read in from a file */ | |
e43aec62 | 35 | #define LINEBUFFERSIZE 1024 |
97abc6ad HM |
36 | #define NUMTILDESUBS 30 |
37 | #define NUMCONFIGSUBS 1000 | |
38 | #define TOKENBUFFERSIZE 80 | |
39 | ||
40 | typedef struct { | |
41 | char Tag[TOKENBUFFERSIZE]; | |
42 | char Value[512]; | |
43 | } Translate; | |
44 | ||
45 | void tilde_sub(char [], Translate [], int); | |
46 | ||
47 | int | |
48 | main(int argc, char *argv[]) | |
49 | { | |
b8df70f4 CB |
50 | int c, i; |
51 | char *ifile = NULL; | |
52 | char WorkString[LINEBUFFERSIZE]; | |
53 | FILE *ConfigSH, *Config_H, *Extra_Subs; | |
97abc6ad | 54 | char LineBuffer[LINEBUFFERSIZE], *TempValue, *StartTilde, *EndTilde; |
cc391245 | 55 | char SecondaryLineBuffer[LINEBUFFERSIZE], OutBuf[LINEBUFFERSIZE]; |
97abc6ad HM |
56 | char TokenBuffer[TOKENBUFFERSIZE]; |
57 | int LineBufferLength, TempLength, DummyVariable, LineBufferLoop; | |
cc391245 | 58 | int TokenBufferLoop, ConfigSubLoop, GotIt, OutBufPos; |
97abc6ad HM |
59 | Translate TildeSub[NUMTILDESUBS]; /* Holds the tilde (~FOO~) */ |
60 | /* substitutions */ | |
61 | Translate ConfigSub[NUMCONFIGSUBS]; /* Holds the substitutions from */ | |
62 | /* config.sh */ | |
63 | int TildeSubCount = 0, ConfigSubCount = 0; /* # of tilde substitutions */ | |
64 | /* and config substitutions, */ | |
65 | /* respectively */ | |
66 | if (argc < 3) { | |
b8df70f4 | 67 | printf("Usage: munchconfig config.sh config_h.sh [-f file] [foo=bar [baz=xyzzy [...]]]\n"); |
97abc6ad HM |
68 | exit(EXIT_FAILURE); |
69 | } | |
70 | ||
b8df70f4 CB |
71 | optind = 3; /* skip config.sh and config_h.sh */ |
72 | while ((c = getopt(argc, argv, "f:")) != -1) { | |
73 | switch (c) { | |
74 | case 'f': | |
75 | ifile = optarg; | |
76 | break; | |
77 | case ':': | |
78 | fprintf(stderr, "Option -%c requires an operand\n", optopt); | |
79 | break; | |
80 | case '?': | |
81 | fprintf(stderr,"Unrecognised option: -%c\n", optopt); | |
82 | } | |
83 | } | |
84 | ||
97abc6ad HM |
85 | /* First, open the input files */ |
86 | if (NULL == (ConfigSH = fopen(argv[1], "r"))) { | |
87 | printf("Error %i trying to open config.sh file %s\n", errno, argv[1]); | |
88 | exit(EXIT_FAILURE); | |
89 | } | |
90 | ||
91 | if (NULL == (Config_H = fopen(argv[2], "r"))) { | |
92 | printf("Error %i trying to open config_h.sh file %s\n", errno, argv[2]); | |
93 | exit(EXIT_FAILURE); | |
94 | } | |
95 | ||
b8df70f4 CB |
96 | if (ifile != NULL && NULL == (Extra_Subs = fopen(ifile, "r"))) { |
97 | printf("Error %i trying to open extra substitutions file %s\n", errno, ifile); | |
98 | exit(EXIT_FAILURE); | |
99 | } | |
100 | ||
97abc6ad | 101 | /* Any tag/value pairs on the command line? */ |
b8df70f4 CB |
102 | if (argc > optind) { |
103 | for (i=optind; i < argc && argv[i]; i++) { | |
97abc6ad HM |
104 | /* Local copy */ |
105 | strcpy(WorkString, argv[i]); | |
106 | /* Stick a NULL over the = */ | |
107 | TempValue = strchr(WorkString, '='); | |
108 | *TempValue++ = '\0'; | |
109 | ||
110 | /* Copy the tag and value into the holding array */ | |
111 | strcpy(TildeSub[TildeSubCount].Tag, WorkString); | |
112 | strcpy(TildeSub[TildeSubCount].Value, TempValue); | |
113 | TildeSubCount++; | |
114 | } | |
115 | } | |
116 | ||
b8df70f4 CB |
117 | /* Now read in the tag/value pairs from the extra substitutions file, if any */ |
118 | while(ifile && fgets(LineBuffer, LINEBUFFERSIZE - 1, Extra_Subs)) { | |
119 | /* Force a trailing null, just in case */ | |
120 | LineBuffer[LINEBUFFERSIZE - 1] = '\0'; | |
121 | LineBufferLength = strlen(LineBuffer); | |
122 | ||
123 | /* Chop trailing control characters */ | |
124 | while((LineBufferLength > 0) && (LineBuffer[LineBufferLength-1] < ' ')) { | |
125 | LineBuffer[LineBufferLength - 1] = '\0'; | |
126 | LineBufferLength--; | |
127 | } | |
128 | ||
129 | /* If it's empty, then try again */ | |
130 | if (!*LineBuffer) | |
131 | continue; | |
132 | ||
133 | /* Local copy */ | |
134 | strcpy(WorkString, LineBuffer); | |
135 | /* Stick a NULL over the = */ | |
136 | TempValue = strchr(WorkString, '='); | |
137 | *TempValue++ = '\0'; | |
138 | ||
139 | /* Copy the tag and value into the holding array */ | |
140 | strcpy(TildeSub[TildeSubCount].Tag, WorkString); | |
141 | strcpy(TildeSub[TildeSubCount].Value, TempValue); | |
142 | TildeSubCount++; | |
143 | } | |
144 | ||
145 | ||
97abc6ad HM |
146 | /* Now read in the config.sh file. */ |
147 | while(fgets(LineBuffer, LINEBUFFERSIZE - 1, ConfigSH)) { | |
148 | /* Force a trailing null, just in case */ | |
149 | LineBuffer[LINEBUFFERSIZE - 1] = '\0'; | |
150 | ||
151 | LineBufferLength = strlen(LineBuffer); | |
152 | ||
153 | /* Chop trailing control characters */ | |
154 | while((LineBufferLength > 0) && (LineBuffer[LineBufferLength-1] < ' ')) { | |
155 | LineBuffer[LineBufferLength - 1] = '\0'; | |
156 | LineBufferLength--; | |
157 | } | |
158 | ||
159 | /* If it's empty, then try again */ | |
160 | if (!*LineBuffer) | |
161 | continue; | |
162 | ||
163 | /* If the line begins with a '#' or ' ', skip */ | |
164 | if ((LineBuffer[0] == ' ') || (LineBuffer[0] == '#')) | |
165 | continue; | |
166 | ||
167 | /* We've got something. Guess we need to actually handle it */ | |
168 | /* Do the tilde substitution */ | |
169 | tilde_sub(LineBuffer, TildeSub, TildeSubCount); | |
170 | ||
171 | /* Stick a NULL over the = */ | |
172 | TempValue = strchr(LineBuffer, '='); | |
173 | *TempValue++ = '\0'; | |
174 | /* And another over the leading ', which better be there */ | |
175 | *TempValue++ = '\0'; | |
176 | ||
b6e4eeb2 HM |
177 | /* Check to see if there's a trailing ' or ". If not, add a newline to |
178 | the buffer and grab another line. */ | |
97abc6ad | 179 | TempLength = strlen(TempValue); |
b6e4eeb2 HM |
180 | while ((TempValue[TempLength-1] != '\'') && |
181 | (TempValue[TempLength-1] != '"')) { | |
97abc6ad HM |
182 | fgets(SecondaryLineBuffer, LINEBUFFERSIZE - 1, ConfigSH); |
183 | /* Force a trailing null, just in case */ | |
184 | SecondaryLineBuffer[LINEBUFFERSIZE - 1] = '\0'; | |
185 | /* Go substitute */ | |
186 | tilde_sub(SecondaryLineBuffer, TildeSub, TildeSubCount); | |
187 | /* Tack a nweline on the end of our primary buffer */ | |
188 | strcat(TempValue, "\n"); | |
189 | /* Concat the new line we just read */ | |
190 | strcat(TempValue, SecondaryLineBuffer); | |
191 | ||
192 | /* Refigure the length */ | |
193 | TempLength = strlen(TempValue); | |
194 | ||
195 | /* Chop trailing control characters */ | |
196 | while((TempLength > 0) && (TempValue[TempLength-1] < ' ')) { | |
197 | TempValue[TempLength - 1] = '\0'; | |
198 | TempLength--; | |
199 | } | |
200 | } | |
201 | ||
202 | /* And finally one over the trailing ' */ | |
203 | TempValue[TempLength-1] = '\0'; | |
204 | ||
205 | /* Is there even anything left? */ | |
206 | if(*TempValue) { | |
207 | /* Copy the tag over */ | |
208 | strcpy(ConfigSub[ConfigSubCount].Tag, LineBuffer); | |
209 | /* Copy the value over */ | |
210 | strcpy(ConfigSub[ConfigSubCount].Value, TempValue); | |
211 | ||
212 | /* Up the count */ | |
213 | ConfigSubCount++; | |
214 | ||
215 | } | |
216 | } | |
217 | ||
218 | /* Okay, we've read in all the substititions from our config.sh */ | |
219 | /* equivalent. Read in the config_h.sh equiv and start the substitution */ | |
220 | ||
221 | /* First, eat all the lines until we get to one with !GROK!THIS! in it */ | |
222 | while(!strstr(fgets(LineBuffer, LINEBUFFERSIZE, Config_H), | |
223 | "!GROK!THIS!")) { | |
224 | ||
225 | /* Dummy statement to shut up any compiler that'll whine about an empty */ | |
226 | /* loop */ | |
227 | DummyVariable++; | |
228 | } | |
229 | ||
230 | /* Right, we've read all the lines through the first one with !GROK!THIS! */ | |
231 | /* in it. That gets us through the beginning stuff. Now start in earnest */ | |
232 | /* with our translations, which run until we get to another !GROK!THIS! */ | |
233 | while(!strstr(fgets(LineBuffer, LINEBUFFERSIZE, Config_H), | |
234 | "!GROK!THIS!")) { | |
235 | /* Force a trailing null, just in case */ | |
236 | LineBuffer[LINEBUFFERSIZE - 1] = '\0'; | |
237 | ||
238 | /* Tilde Substitute */ | |
239 | tilde_sub(LineBuffer, TildeSub, TildeSubCount); | |
240 | ||
241 | LineBufferLength = strlen(LineBuffer); | |
242 | ||
243 | /* Chop trailing control characters */ | |
244 | while((LineBufferLength > 0) && (LineBuffer[LineBufferLength-1] < ' ')) { | |
245 | LineBuffer[LineBufferLength - 1] = '\0'; | |
246 | LineBufferLength--; | |
247 | } | |
248 | ||
cc391245 | 249 | OutBufPos = 0; |
97abc6ad HM |
250 | /* Right. Go looking for $s. */ |
251 | for(LineBufferLoop = 0; LineBufferLoop < LineBufferLength; | |
252 | LineBufferLoop++) { | |
253 | /* Did we find one? */ | |
254 | if ('$' != LineBuffer[LineBufferLoop]) { | |
255 | /* Nope, spit out the value */ | |
cc391245 | 256 | OutBuf[OutBufPos++] = LineBuffer[LineBufferLoop]; |
97abc6ad HM |
257 | } else { |
258 | /* Yes, we did. Is it escaped? */ | |
259 | if ((LineBufferLoop > 0) && ('\\' == LineBuffer[LineBufferLoop - | |
260 | 1])) { | |
261 | /* Yup. Spit it out */ | |
cc391245 | 262 | OutBuf[OutBufPos++] = LineBuffer[LineBufferLoop]; |
97abc6ad HM |
263 | } else { |
264 | /* Nope. Go grab us a token */ | |
265 | TokenBufferLoop = 0; | |
266 | /* Advance to the next character in the input stream */ | |
267 | LineBufferLoop++; | |
268 | while((LineBufferLoop < LineBufferLength) && | |
269 | ((isalnum(LineBuffer[LineBufferLoop]) || ('_' == | |
270 | LineBuffer[LineBufferLoop])))) { | |
271 | TokenBuffer[TokenBufferLoop] = LineBuffer[LineBufferLoop]; | |
272 | LineBufferLoop++; | |
273 | TokenBufferLoop++; | |
274 | } | |
275 | ||
276 | /* Trailing null on the token buffer */ | |
277 | TokenBuffer[TokenBufferLoop] = '\0'; | |
278 | ||
279 | /* Back the line buffer pointer up one */ | |
280 | LineBufferLoop--; | |
281 | ||
282 | /* Right, we're done grabbing a token. Check to make sure we got */ | |
283 | /* something */ | |
284 | if (TokenBufferLoop) { | |
285 | /* Well, we do. Run through all the tokens we've got in the */ | |
286 | /* ConfigSub array and see if any match */ | |
287 | GotIt = 0; | |
288 | for(ConfigSubLoop = 0; ConfigSubLoop < ConfigSubCount; | |
289 | ConfigSubLoop++) { | |
290 | if (!strcmp(TokenBuffer, ConfigSub[ConfigSubLoop].Tag)) { | |
cc391245 CB |
291 | char *cp = ConfigSub[ConfigSubLoop].Value; |
292 | GotIt = 1; | |
293 | while (*cp) OutBuf[OutBufPos++] = *(cp++); | |
97abc6ad HM |
294 | break; |
295 | } | |
296 | } | |
297 | ||
298 | /* Did we find something? If not, spit out what was in our */ | |
299 | /* buffer */ | |
300 | if (!GotIt) { | |
cc391245 CB |
301 | char *cp = TokenBuffer; |
302 | OutBuf[OutBufPos++] = '$'; | |
303 | while (*cp) OutBuf[OutBufPos++] = *(cp++); | |
97abc6ad HM |
304 | } |
305 | ||
306 | } else { | |
307 | /* Just a bare $. Spit it out */ | |
cc391245 | 308 | OutBuf[OutBufPos++] = '$'; |
97abc6ad HM |
309 | } |
310 | } | |
311 | } | |
312 | } | |
313 | ||
cc391245 CB |
314 | /* If we've created an #undef line, make sure we don't output anthing |
315 | * after the "#undef FOO" besides comments. We could do this as we | |
316 | * go by recognizing the #undef as it goes by, and thus avoid another | |
317 | * use of a fixed-length buffer, but this is simpler. | |
318 | */ | |
319 | if (!strncmp(OutBuf,"#undef",6)) { | |
320 | char *cp = OutBuf; | |
321 | int i, incomment = 0; | |
322 | LineBufferLoop = 0; | |
323 | OutBuf[OutBufPos] = '\0'; | |
324 | for (i = 0; i <= 1; i++) { | |
325 | while (!isspace(*cp)) LineBuffer[LineBufferLoop++] = *(cp++); | |
326 | while ( isspace(*cp)) LineBuffer[LineBufferLoop++] = *(cp++); | |
327 | } | |
328 | while (*cp) { | |
329 | while (isspace(*cp)) LineBuffer[LineBufferLoop++] = *(cp++); | |
330 | if (!incomment && *cp == '/' && *(cp+1) == '*') incomment = 1; | |
331 | while (*cp && !isspace(*cp)) { | |
332 | if (incomment) LineBuffer[LineBufferLoop++] = *cp; | |
333 | cp++; | |
334 | } | |
335 | if (incomment && *cp == '*' && *(cp+1) == '/') incomment = 0; | |
336 | } | |
337 | LineBuffer[LineBufferLoop] = '\0'; | |
338 | puts(LineBuffer); | |
339 | } | |
340 | else { | |
341 | OutBuf[OutBufPos] = '\0'; | |
342 | puts(OutBuf); | |
343 | } | |
97abc6ad HM |
344 | } |
345 | ||
346 | /* Close the files */ | |
347 | fclose(ConfigSH); | |
348 | fclose(Config_H); | |
b8df70f4 | 349 | if (ifile) fclose(Extra_Subs); |
97abc6ad HM |
350 | } |
351 | ||
352 | void | |
353 | tilde_sub(char LineBuffer[], Translate TildeSub[], int TildeSubCount) | |
354 | { | |
355 | char TempBuffer[LINEBUFFERSIZE], TempTilde[TOKENBUFFERSIZE]; | |
356 | int TildeLoop, InTilde, CopiedBufferLength, TildeBufferLength, k, GotIt; | |
357 | int TempLength; | |
358 | InTilde = 0; | |
359 | CopiedBufferLength = 0; | |
360 | TildeBufferLength = 0; | |
361 | TempLength = strlen(LineBuffer); | |
362 | ||
363 | /* Grovel over our input looking for ~foo~ constructs */ | |
364 | for(TildeLoop = 0; TildeLoop < TempLength; TildeLoop++) { | |
365 | /* Are we in a tilde? */ | |
366 | if (InTilde) { | |
367 | /* Yup. Is the current character a tilde? */ | |
368 | if (LineBuffer[TildeLoop] == '~') { | |
369 | /* Yup. That means we're ready to do a substitution */ | |
370 | InTilde = 0; | |
371 | GotIt = 0; | |
372 | /* Trailing null */ | |
373 | TempTilde[TildeBufferLength] = '\0'; | |
374 | for( k=0; k < TildeSubCount; k++) { | |
375 | if (!strcmp(TildeSub[k].Tag, TempTilde)) { | |
376 | GotIt = 1; | |
377 | /* Tack on the trailing null to the main buffer */ | |
378 | TempBuffer[CopiedBufferLength] = '\0'; | |
379 | /* Copy the tilde substitution over */ | |
380 | strcat(TempBuffer, TildeSub[k].Value); | |
381 | CopiedBufferLength = strlen(TempBuffer); | |
382 | } | |
383 | } | |
384 | ||
385 | /* Did we find anything? */ | |
386 | if (GotIt == 0) { | |
387 | /* Guess not. Copy the whole thing out verbatim */ | |
388 | TempBuffer[CopiedBufferLength] = '\0'; | |
389 | TempBuffer[CopiedBufferLength++] = '~'; | |
390 | TempBuffer[CopiedBufferLength] = '\0'; | |
391 | strcat(TempBuffer, TempTilde); | |
392 | strcat(TempBuffer, "~"); | |
393 | CopiedBufferLength = strlen(TempBuffer); | |
394 | } | |
395 | ||
396 | } else { | |
397 | /* 'Kay, not a tilde. Is it a word character? */ | |
154545c7 | 398 | if (isalnum(LineBuffer[TildeLoop]) || |
97abc6ad HM |
399 | (LineBuffer[TildeLoop] == '-')) { |
400 | TempTilde[TildeBufferLength++] = LineBuffer[TildeLoop]; | |
401 | } else { | |
402 | /* No, it's not a tilde character. For shame! We've got a */ | |
403 | /* bogus token. Copy a ~ into the output buffer, then append */ | |
404 | /* whatever we've got in our token buffer */ | |
405 | TempBuffer[CopiedBufferLength++] = '~'; | |
406 | TempBuffer[CopiedBufferLength] = '\0'; | |
407 | TempTilde[TildeBufferLength] = '\0'; | |
408 | strcat(TempBuffer, TempTilde); | |
409 | CopiedBufferLength += TildeBufferLength; | |
410 | InTilde = 0; | |
411 | } | |
412 | } | |
413 | } else { | |
414 | /* We're not in a tilde. Do we want to be? */ | |
415 | if (LineBuffer[TildeLoop] == '~') { | |
416 | /* Guess so */ | |
417 | InTilde = 1; | |
418 | TildeBufferLength = 0; | |
419 | } else { | |
420 | /* Nope. Copy the character to the output buffer */ | |
421 | TempBuffer[CopiedBufferLength++] = LineBuffer[TildeLoop]; | |
422 | } | |
423 | } | |
424 | } | |
425 | ||
426 | /* Out of the loop. First, double-check to see if there was anything */ | |
427 | /* pending. */ | |
428 | if (InTilde) { | |
429 | /* bogus token. Copy a ~ into the output buffer, then append */ | |
430 | /* whatever we've got in our token buffer */ | |
431 | TempBuffer[CopiedBufferLength++] = '~'; | |
432 | TempBuffer[CopiedBufferLength] = '\0'; | |
433 | TempTilde[TildeBufferLength] = '\0'; | |
434 | strcat(TempBuffer, TempTilde); | |
435 | CopiedBufferLength += TildeBufferLength; | |
436 | } else { | |
437 | /* Nope, nothing pensing. Tack on a \0 */ | |
438 | TempBuffer[CopiedBufferLength] = '\0'; | |
439 | } | |
440 | ||
441 | /* Okay, we're done. Copy the temp buffer back into the line buffer */ | |
442 | strcpy(LineBuffer, TempBuffer); | |
443 | ||
444 | } | |
445 |