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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 | |
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128 | /* Check to see if there's a trailing ' or ". If not, add a newline to |
129 | the buffer and grab another line. */ |
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130 | TempLength = strlen(TempValue); |
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131 | while ((TempValue[TempLength-1] != '\'') && |
132 | (TempValue[TempLength-1] != '"')) { |
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133 | fgets(SecondaryLineBuffer, LINEBUFFERSIZE - 1, ConfigSH); |
134 | /* Force a trailing null, just in case */ |
135 | SecondaryLineBuffer[LINEBUFFERSIZE - 1] = '\0'; |
136 | /* Go substitute */ |
137 | tilde_sub(SecondaryLineBuffer, TildeSub, TildeSubCount); |
138 | /* Tack a nweline on the end of our primary buffer */ |
139 | strcat(TempValue, "\n"); |
140 | /* Concat the new line we just read */ |
141 | strcat(TempValue, SecondaryLineBuffer); |
142 | |
143 | /* Refigure the length */ |
144 | TempLength = strlen(TempValue); |
145 | |
146 | /* Chop trailing control characters */ |
147 | while((TempLength > 0) && (TempValue[TempLength-1] < ' ')) { |
148 | TempValue[TempLength - 1] = '\0'; |
149 | TempLength--; |
150 | } |
151 | } |
152 | |
153 | /* And finally one over the trailing ' */ |
154 | TempValue[TempLength-1] = '\0'; |
155 | |
156 | /* Is there even anything left? */ |
157 | if(*TempValue) { |
158 | /* Copy the tag over */ |
159 | strcpy(ConfigSub[ConfigSubCount].Tag, LineBuffer); |
160 | /* Copy the value over */ |
161 | strcpy(ConfigSub[ConfigSubCount].Value, TempValue); |
162 | |
163 | /* Up the count */ |
164 | ConfigSubCount++; |
165 | |
166 | } |
167 | } |
168 | |
169 | /* Okay, we've read in all the substititions from our config.sh */ |
170 | /* equivalent. Read in the config_h.sh equiv and start the substitution */ |
171 | |
172 | /* First, eat all the lines until we get to one with !GROK!THIS! in it */ |
173 | while(!strstr(fgets(LineBuffer, LINEBUFFERSIZE, Config_H), |
174 | "!GROK!THIS!")) { |
175 | |
176 | /* Dummy statement to shut up any compiler that'll whine about an empty */ |
177 | /* loop */ |
178 | DummyVariable++; |
179 | } |
180 | |
181 | /* Right, we've read all the lines through the first one with !GROK!THIS! */ |
182 | /* in it. That gets us through the beginning stuff. Now start in earnest */ |
183 | /* with our translations, which run until we get to another !GROK!THIS! */ |
184 | while(!strstr(fgets(LineBuffer, LINEBUFFERSIZE, Config_H), |
185 | "!GROK!THIS!")) { |
186 | /* Force a trailing null, just in case */ |
187 | LineBuffer[LINEBUFFERSIZE - 1] = '\0'; |
188 | |
189 | /* Tilde Substitute */ |
190 | tilde_sub(LineBuffer, TildeSub, TildeSubCount); |
191 | |
192 | LineBufferLength = strlen(LineBuffer); |
193 | |
194 | /* Chop trailing control characters */ |
195 | while((LineBufferLength > 0) && (LineBuffer[LineBufferLength-1] < ' ')) { |
196 | LineBuffer[LineBufferLength - 1] = '\0'; |
197 | LineBufferLength--; |
198 | } |
199 | |
200 | /* Right. Go looking for $s. */ |
201 | for(LineBufferLoop = 0; LineBufferLoop < LineBufferLength; |
202 | LineBufferLoop++) { |
203 | /* Did we find one? */ |
204 | if ('$' != LineBuffer[LineBufferLoop]) { |
205 | /* Nope, spit out the value */ |
206 | putchar(LineBuffer[LineBufferLoop]); |
207 | } else { |
208 | /* Yes, we did. Is it escaped? */ |
209 | if ((LineBufferLoop > 0) && ('\\' == LineBuffer[LineBufferLoop - |
210 | 1])) { |
211 | /* Yup. Spit it out */ |
212 | putchar(LineBuffer[LineBufferLoop]); |
213 | } else { |
214 | /* Nope. Go grab us a token */ |
215 | TokenBufferLoop = 0; |
216 | /* Advance to the next character in the input stream */ |
217 | LineBufferLoop++; |
218 | while((LineBufferLoop < LineBufferLength) && |
219 | ((isalnum(LineBuffer[LineBufferLoop]) || ('_' == |
220 | LineBuffer[LineBufferLoop])))) { |
221 | TokenBuffer[TokenBufferLoop] = LineBuffer[LineBufferLoop]; |
222 | LineBufferLoop++; |
223 | TokenBufferLoop++; |
224 | } |
225 | |
226 | /* Trailing null on the token buffer */ |
227 | TokenBuffer[TokenBufferLoop] = '\0'; |
228 | |
229 | /* Back the line buffer pointer up one */ |
230 | LineBufferLoop--; |
231 | |
232 | /* Right, we're done grabbing a token. Check to make sure we got */ |
233 | /* something */ |
234 | if (TokenBufferLoop) { |
235 | /* Well, we do. Run through all the tokens we've got in the */ |
236 | /* ConfigSub array and see if any match */ |
237 | GotIt = 0; |
238 | for(ConfigSubLoop = 0; ConfigSubLoop < ConfigSubCount; |
239 | ConfigSubLoop++) { |
240 | if (!strcmp(TokenBuffer, ConfigSub[ConfigSubLoop].Tag)) { |
241 | GotIt = 1; |
242 | printf("%s", ConfigSub[ConfigSubLoop].Value); |
243 | break; |
244 | } |
245 | } |
246 | |
247 | /* Did we find something? If not, spit out what was in our */ |
248 | /* buffer */ |
249 | if (!GotIt) { |
250 | printf("$%s", TokenBuffer); |
251 | } |
252 | |
253 | } else { |
254 | /* Just a bare $. Spit it out */ |
255 | putchar('$'); |
256 | } |
257 | } |
258 | } |
259 | } |
260 | |
261 | /* We're all done. Spit out an EOL */ |
262 | printf("\n"); |
263 | |
264 | |
265 | } |
266 | |
267 | /* Close the files */ |
268 | fclose(ConfigSH); |
269 | fclose(Config_H); |
270 | } |
271 | |
272 | void |
273 | tilde_sub(char LineBuffer[], Translate TildeSub[], int TildeSubCount) |
274 | { |
275 | char TempBuffer[LINEBUFFERSIZE], TempTilde[TOKENBUFFERSIZE]; |
276 | int TildeLoop, InTilde, CopiedBufferLength, TildeBufferLength, k, GotIt; |
277 | int TempLength; |
278 | InTilde = 0; |
279 | CopiedBufferLength = 0; |
280 | TildeBufferLength = 0; |
281 | TempLength = strlen(LineBuffer); |
282 | |
283 | /* Grovel over our input looking for ~foo~ constructs */ |
284 | for(TildeLoop = 0; TildeLoop < TempLength; TildeLoop++) { |
285 | /* Are we in a tilde? */ |
286 | if (InTilde) { |
287 | /* Yup. Is the current character a tilde? */ |
288 | if (LineBuffer[TildeLoop] == '~') { |
289 | /* Yup. That means we're ready to do a substitution */ |
290 | InTilde = 0; |
291 | GotIt = 0; |
292 | /* Trailing null */ |
293 | TempTilde[TildeBufferLength] = '\0'; |
294 | for( k=0; k < TildeSubCount; k++) { |
295 | if (!strcmp(TildeSub[k].Tag, TempTilde)) { |
296 | GotIt = 1; |
297 | /* Tack on the trailing null to the main buffer */ |
298 | TempBuffer[CopiedBufferLength] = '\0'; |
299 | /* Copy the tilde substitution over */ |
300 | strcat(TempBuffer, TildeSub[k].Value); |
301 | CopiedBufferLength = strlen(TempBuffer); |
302 | } |
303 | } |
304 | |
305 | /* Did we find anything? */ |
306 | if (GotIt == 0) { |
307 | /* Guess not. Copy the whole thing out verbatim */ |
308 | TempBuffer[CopiedBufferLength] = '\0'; |
309 | TempBuffer[CopiedBufferLength++] = '~'; |
310 | TempBuffer[CopiedBufferLength] = '\0'; |
311 | strcat(TempBuffer, TempTilde); |
312 | strcat(TempBuffer, "~"); |
313 | CopiedBufferLength = strlen(TempBuffer); |
314 | } |
315 | |
316 | } else { |
317 | /* 'Kay, not a tilde. Is it a word character? */ |
318 | if (isalnum(LineBuffer[TildeLoop]) || (LineBuffer[TildeLoop] = |
319 | '-') || |
320 | (LineBuffer[TildeLoop] == '-')) { |
321 | TempTilde[TildeBufferLength++] = LineBuffer[TildeLoop]; |
322 | } else { |
323 | /* No, it's not a tilde character. For shame! We've got a */ |
324 | /* bogus token. Copy a ~ into the output buffer, then append */ |
325 | /* whatever we've got in our token buffer */ |
326 | TempBuffer[CopiedBufferLength++] = '~'; |
327 | TempBuffer[CopiedBufferLength] = '\0'; |
328 | TempTilde[TildeBufferLength] = '\0'; |
329 | strcat(TempBuffer, TempTilde); |
330 | CopiedBufferLength += TildeBufferLength; |
331 | InTilde = 0; |
332 | } |
333 | } |
334 | } else { |
335 | /* We're not in a tilde. Do we want to be? */ |
336 | if (LineBuffer[TildeLoop] == '~') { |
337 | /* Guess so */ |
338 | InTilde = 1; |
339 | TildeBufferLength = 0; |
340 | } else { |
341 | /* Nope. Copy the character to the output buffer */ |
342 | TempBuffer[CopiedBufferLength++] = LineBuffer[TildeLoop]; |
343 | } |
344 | } |
345 | } |
346 | |
347 | /* Out of the loop. First, double-check to see if there was anything */ |
348 | /* pending. */ |
349 | if (InTilde) { |
350 | /* bogus token. Copy a ~ into the output buffer, then append */ |
351 | /* whatever we've got in our token buffer */ |
352 | TempBuffer[CopiedBufferLength++] = '~'; |
353 | TempBuffer[CopiedBufferLength] = '\0'; |
354 | TempTilde[TildeBufferLength] = '\0'; |
355 | strcat(TempBuffer, TempTilde); |
356 | CopiedBufferLength += TildeBufferLength; |
357 | } else { |
358 | /* Nope, nothing pensing. Tack on a \0 */ |
359 | TempBuffer[CopiedBufferLength] = '\0'; |
360 | } |
361 | |
362 | /* Okay, we're done. Copy the temp buffer back into the line buffer */ |
363 | strcpy(LineBuffer, TempBuffer); |
364 | |
365 | } |
366 | |