root / logic / trunk / src / mxml / mxml-string.c @ 73
History | View | Annotate | Download (9.34 KB)
1 |
/*
|
---|---|
2 |
* "$Id: mxml-string.c 387 2009-04-18 17:05:52Z mike $"
|
3 |
*
|
4 |
* String functions for Mini-XML, a small XML-like file parsing library.
|
5 |
*
|
6 |
* Copyright 2003-2009 by Michael Sweet.
|
7 |
*
|
8 |
* This program is free software; you can redistribute it and/or
|
9 |
* modify it under the terms of the GNU Library General Public
|
10 |
* License as published by the Free Software Foundation; either
|
11 |
* version 2, or (at your option) any later version.
|
12 |
*
|
13 |
* This program is distributed in the hope that it will be useful,
|
14 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
15 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
16 |
* GNU General Public License for more details.
|
17 |
*
|
18 |
* Contents:
|
19 |
*
|
20 |
* _mxml_snprintf() - Format a string.
|
21 |
* _mxml_strdup() - Duplicate a string.
|
22 |
* _mxml_strdupf() - Format and duplicate a string.
|
23 |
* _mxml_vsnprintf() - Format a string into a fixed size buffer.
|
24 |
* _mxml_vstrdupf() - Format and duplicate a string.
|
25 |
*/
|
26 |
|
27 |
/*
|
28 |
* Include necessary headers...
|
29 |
*/
|
30 |
|
31 |
#include "config.h" |
32 |
|
33 |
|
34 |
#ifndef HAVE_SNPRINTF
|
35 |
/*
|
36 |
* '_mxml_snprintf()' - Format a string.
|
37 |
*/
|
38 |
|
39 |
int /* O - Number of bytes formatted */ |
40 |
_mxml_snprintf(char *buffer, /* I - Output buffer */ |
41 |
size_t bufsize, /* I - Size of output buffer */
|
42 |
const char *format, /* I - Printf-style format string */ |
43 |
...) /* I - Additional arguments as needed */
|
44 |
{ |
45 |
va_list ap; /* Argument list */
|
46 |
int bytes; /* Number of bytes formatted */ |
47 |
|
48 |
|
49 |
va_start(ap, format); |
50 |
bytes = vsnprintf(buffer, bufsize, format, ap); |
51 |
va_end(ap); |
52 |
|
53 |
return (bytes);
|
54 |
} |
55 |
#endif /* !HAVE_SNPRINTF */ |
56 |
|
57 |
|
58 |
/*
|
59 |
* '_mxml_strdup()' - Duplicate a string.
|
60 |
*/
|
61 |
|
62 |
#ifndef HAVE_STRDUP
|
63 |
char * /* O - New string pointer */ |
64 |
_mxml_strdup(const char *s) /* I - String to duplicate */ |
65 |
{ |
66 |
char *t; /* New string pointer */ |
67 |
|
68 |
|
69 |
if (s == NULL) |
70 |
return (NULL); |
71 |
|
72 |
if ((t = malloc(strlen(s) + 1)) == NULL) |
73 |
return (NULL); |
74 |
|
75 |
return (strcpy(t, s));
|
76 |
} |
77 |
#endif /* !HAVE_STRDUP */ |
78 |
|
79 |
|
80 |
/*
|
81 |
* '_mxml_strdupf()' - Format and duplicate a string.
|
82 |
*/
|
83 |
|
84 |
char * /* O - New string pointer */ |
85 |
_mxml_strdupf(const char *format, /* I - Printf-style format string */ |
86 |
...) /* I - Additional arguments as needed */
|
87 |
{ |
88 |
va_list ap; /* Pointer to additional arguments */
|
89 |
char *s; /* Pointer to formatted string */ |
90 |
|
91 |
|
92 |
/*
|
93 |
* Get a pointer to the additional arguments, format the string,
|
94 |
* and return it...
|
95 |
*/
|
96 |
|
97 |
va_start(ap, format); |
98 |
s = _mxml_vstrdupf(format, ap); |
99 |
va_end(ap); |
100 |
|
101 |
return (s);
|
102 |
} |
103 |
|
104 |
|
105 |
#ifndef HAVE_VSNPRINTF
|
106 |
/*
|
107 |
* '_mxml_vsnprintf()' - Format a string into a fixed size buffer.
|
108 |
*/
|
109 |
|
110 |
int /* O - Number of bytes formatted */ |
111 |
_mxml_vsnprintf(char *buffer, /* O - Output buffer */ |
112 |
size_t bufsize, /* O - Size of output buffer */
|
113 |
const char *format, /* I - Printf-style format string */ |
114 |
va_list ap) /* I - Pointer to additional arguments */
|
115 |
{ |
116 |
char *bufptr, /* Pointer to position in buffer */ |
117 |
*bufend, /* Pointer to end of buffer */
|
118 |
sign, /* Sign of format width */
|
119 |
size, /* Size character (h, l, L) */
|
120 |
type; /* Format type character */
|
121 |
int width, /* Width of field */ |
122 |
prec; /* Number of characters of precision */
|
123 |
char tformat[100], /* Temporary format string for sprintf() */ |
124 |
*tptr, /* Pointer into temporary format */
|
125 |
temp[1024]; /* Buffer for formatted numbers */ |
126 |
char *s; /* Pointer to string */ |
127 |
int slen; /* Length of string */ |
128 |
int bytes; /* Total number of bytes needed */ |
129 |
|
130 |
|
131 |
/*
|
132 |
* Loop through the format string, formatting as needed...
|
133 |
*/
|
134 |
|
135 |
bufptr = buffer; |
136 |
bufend = buffer + bufsize - 1;
|
137 |
bytes = 0;
|
138 |
|
139 |
while (*format)
|
140 |
{ |
141 |
if (*format == '%') |
142 |
{ |
143 |
tptr = tformat; |
144 |
*tptr++ = *format++; |
145 |
|
146 |
if (*format == '%') |
147 |
{ |
148 |
if (bufptr && bufptr < bufend) *bufptr++ = *format;
|
149 |
bytes ++; |
150 |
format ++; |
151 |
continue;
|
152 |
} |
153 |
else if (strchr(" -+#\'", *format)) |
154 |
{ |
155 |
*tptr++ = *format; |
156 |
sign = *format++; |
157 |
} |
158 |
else
|
159 |
sign = 0;
|
160 |
|
161 |
if (*format == '*') |
162 |
{ |
163 |
/*
|
164 |
* Get width from argument...
|
165 |
*/
|
166 |
|
167 |
format ++; |
168 |
width = va_arg(ap, int);
|
169 |
|
170 |
snprintf(tptr, sizeof(tformat) - (tptr - tformat), "%d", width); |
171 |
tptr += strlen(tptr); |
172 |
} |
173 |
else
|
174 |
{ |
175 |
width = 0;
|
176 |
|
177 |
while (isdigit(*format & 255)) |
178 |
{ |
179 |
if (tptr < (tformat + sizeof(tformat) - 1)) |
180 |
*tptr++ = *format; |
181 |
|
182 |
width = width * 10 + *format++ - '0'; |
183 |
} |
184 |
} |
185 |
|
186 |
if (*format == '.') |
187 |
{ |
188 |
if (tptr < (tformat + sizeof(tformat) - 1)) |
189 |
*tptr++ = *format; |
190 |
|
191 |
format ++; |
192 |
|
193 |
if (*format == '*') |
194 |
{ |
195 |
/*
|
196 |
* Get precision from argument...
|
197 |
*/
|
198 |
|
199 |
format ++; |
200 |
prec = va_arg(ap, int);
|
201 |
|
202 |
snprintf(tptr, sizeof(tformat) - (tptr - tformat), "%d", prec); |
203 |
tptr += strlen(tptr); |
204 |
} |
205 |
else
|
206 |
{ |
207 |
prec = 0;
|
208 |
|
209 |
while (isdigit(*format & 255)) |
210 |
{ |
211 |
if (tptr < (tformat + sizeof(tformat) - 1)) |
212 |
*tptr++ = *format; |
213 |
|
214 |
prec = prec * 10 + *format++ - '0'; |
215 |
} |
216 |
} |
217 |
} |
218 |
else
|
219 |
prec = -1;
|
220 |
|
221 |
if (*format == 'l' && format[1] == 'l') |
222 |
{ |
223 |
size = 'L';
|
224 |
|
225 |
if (tptr < (tformat + sizeof(tformat) - 2)) |
226 |
{ |
227 |
*tptr++ = 'l';
|
228 |
*tptr++ = 'l';
|
229 |
} |
230 |
|
231 |
format += 2;
|
232 |
} |
233 |
else if (*format == 'h' || *format == 'l' || *format == 'L') |
234 |
{ |
235 |
if (tptr < (tformat + sizeof(tformat) - 1)) |
236 |
*tptr++ = *format; |
237 |
|
238 |
size = *format++; |
239 |
} |
240 |
|
241 |
if (!*format)
|
242 |
break;
|
243 |
|
244 |
if (tptr < (tformat + sizeof(tformat) - 1)) |
245 |
*tptr++ = *format; |
246 |
|
247 |
type = *format++; |
248 |
*tptr = '\0';
|
249 |
|
250 |
switch (type)
|
251 |
{ |
252 |
case 'E' : /* Floating point formats */ |
253 |
case 'G' : |
254 |
case 'e' : |
255 |
case 'f' : |
256 |
case 'g' : |
257 |
if ((width + 2) > sizeof(temp)) |
258 |
break;
|
259 |
|
260 |
sprintf(temp, tformat, va_arg(ap, double));
|
261 |
|
262 |
bytes += strlen(temp); |
263 |
|
264 |
if (bufptr)
|
265 |
{ |
266 |
if ((bufptr + strlen(temp)) > bufend)
|
267 |
{ |
268 |
strncpy(bufptr, temp, (size_t)(bufend - bufptr)); |
269 |
bufptr = bufend; |
270 |
} |
271 |
else
|
272 |
{ |
273 |
strcpy(bufptr, temp); |
274 |
bufptr += strlen(temp); |
275 |
} |
276 |
} |
277 |
break;
|
278 |
|
279 |
case 'B' : /* Integer formats */ |
280 |
case 'X' : |
281 |
case 'b' : |
282 |
case 'd' : |
283 |
case 'i' : |
284 |
case 'o' : |
285 |
case 'u' : |
286 |
case 'x' : |
287 |
if ((width + 2) > sizeof(temp)) |
288 |
break;
|
289 |
|
290 |
#ifdef HAVE_LONG_LONG
|
291 |
if (size == 'L') |
292 |
sprintf(temp, tformat, va_arg(ap, long long)); |
293 |
else
|
294 |
#endif /* HAVE_LONG_LONG */ |
295 |
sprintf(temp, tformat, va_arg(ap, int));
|
296 |
|
297 |
bytes += strlen(temp); |
298 |
|
299 |
if (bufptr)
|
300 |
{ |
301 |
if ((bufptr + strlen(temp)) > bufend)
|
302 |
{ |
303 |
strncpy(bufptr, temp, (size_t)(bufend - bufptr)); |
304 |
bufptr = bufend; |
305 |
} |
306 |
else
|
307 |
{ |
308 |
strcpy(bufptr, temp); |
309 |
bufptr += strlen(temp); |
310 |
} |
311 |
} |
312 |
break;
|
313 |
|
314 |
case 'p' : /* Pointer value */ |
315 |
if ((width + 2) > sizeof(temp)) |
316 |
break;
|
317 |
|
318 |
sprintf(temp, tformat, va_arg(ap, void *));
|
319 |
|
320 |
bytes += strlen(temp); |
321 |
|
322 |
if (bufptr)
|
323 |
{ |
324 |
if ((bufptr + strlen(temp)) > bufend)
|
325 |
{ |
326 |
strncpy(bufptr, temp, (size_t)(bufend - bufptr)); |
327 |
bufptr = bufend; |
328 |
} |
329 |
else
|
330 |
{ |
331 |
strcpy(bufptr, temp); |
332 |
bufptr += strlen(temp); |
333 |
} |
334 |
} |
335 |
break;
|
336 |
|
337 |
case 'c' : /* Character or character array */ |
338 |
bytes += width; |
339 |
|
340 |
if (bufptr)
|
341 |
{ |
342 |
if (width <= 1) |
343 |
*bufptr++ = va_arg(ap, int);
|
344 |
else
|
345 |
{ |
346 |
if ((bufptr + width) > bufend)
|
347 |
width = bufend - bufptr; |
348 |
|
349 |
memcpy(bufptr, va_arg(ap, char *), (size_t)width);
|
350 |
bufptr += width; |
351 |
} |
352 |
} |
353 |
break;
|
354 |
|
355 |
case 's' : /* String */ |
356 |
if ((s = va_arg(ap, char *)) == NULL) |
357 |
s = "(null)";
|
358 |
|
359 |
slen = strlen(s); |
360 |
if (slen > width && prec != width)
|
361 |
width = slen; |
362 |
|
363 |
bytes += width; |
364 |
|
365 |
if (bufptr)
|
366 |
{ |
367 |
if ((bufptr + width) > bufend)
|
368 |
width = bufend - bufptr; |
369 |
|
370 |
if (slen > width)
|
371 |
slen = width; |
372 |
|
373 |
if (sign == '-') |
374 |
{ |
375 |
strncpy(bufptr, s, (size_t)slen); |
376 |
memset(bufptr + slen, ' ', (size_t)(width - slen));
|
377 |
} |
378 |
else
|
379 |
{ |
380 |
memset(bufptr, ' ', (size_t)(width - slen));
|
381 |
strncpy(bufptr + width - slen, s, (size_t)slen); |
382 |
} |
383 |
|
384 |
bufptr += width; |
385 |
} |
386 |
break;
|
387 |
|
388 |
case 'n' : /* Output number of chars so far */ |
389 |
*(va_arg(ap, int *)) = bytes;
|
390 |
break;
|
391 |
} |
392 |
} |
393 |
else
|
394 |
{ |
395 |
bytes ++; |
396 |
|
397 |
if (bufptr && bufptr < bufend)
|
398 |
*bufptr++ = *format; |
399 |
|
400 |
format ++; |
401 |
} |
402 |
} |
403 |
|
404 |
/*
|
405 |
* Nul-terminate the string and return the number of characters needed.
|
406 |
*/
|
407 |
|
408 |
*bufptr = '\0';
|
409 |
|
410 |
return (bytes);
|
411 |
} |
412 |
#endif /* !HAVE_VSNPRINTF */ |
413 |
|
414 |
|
415 |
/*
|
416 |
* '_mxml_vstrdupf()' - Format and duplicate a string.
|
417 |
*/
|
418 |
|
419 |
char * /* O - New string pointer */ |
420 |
_mxml_vstrdupf(const char *format, /* I - Printf-style format string */ |
421 |
va_list ap) /* I - Pointer to additional arguments */
|
422 |
{ |
423 |
int bytes; /* Number of bytes required */ |
424 |
char *buffer, /* String buffer */ |
425 |
temp[256]; /* Small buffer for first vsnprintf */ |
426 |
|
427 |
|
428 |
/*
|
429 |
* First format with a tiny buffer; this will tell us how many bytes are
|
430 |
* needed...
|
431 |
*/
|
432 |
|
433 |
bytes = vsnprintf(temp, sizeof(temp), format, ap);
|
434 |
|
435 |
if (bytes < sizeof(temp)) |
436 |
{ |
437 |
/*
|
438 |
* Hey, the formatted string fits in the tiny buffer, so just dup that...
|
439 |
*/
|
440 |
|
441 |
return (strdup(temp));
|
442 |
} |
443 |
|
444 |
/*
|
445 |
* Allocate memory for the whole thing and reformat to the new, larger
|
446 |
* buffer...
|
447 |
*/
|
448 |
|
449 |
if ((buffer = calloc(1, bytes + 1)) != NULL) |
450 |
vsnprintf(buffer, bytes + 1, format, ap);
|
451 |
|
452 |
/*
|
453 |
* Return the new string...
|
454 |
*/
|
455 |
|
456 |
return (buffer);
|
457 |
} |
458 |
|
459 |
|
460 |
/*
|
461 |
* End of "$Id: mxml-string.c 387 2009-04-18 17:05:52Z mike $".
|
462 |
*/
|