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97abc6ad |
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 | |