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