]>
Commit | Line | Data |
---|---|---|
ef416fc2 | 1 | /* |
2 | * "$Id: snprintf.c 4683 2005-09-21 22:17:44Z mike $" | |
3 | * | |
4 | * snprintf functions for the Common UNIX Printing System (CUPS). | |
5 | * | |
6 | * Copyright 1997-2005 by Easy Software Products. | |
7 | * | |
8 | * These coded instructions, statements, and computer programs are the | |
9 | * property of Easy Software Products and are protected by Federal | |
10 | * copyright law. Distribution and use rights are outlined in the file | |
11 | * "LICENSE.txt" which should have been included with this file. If this | |
12 | * file is missing or damaged please contact Easy Software Products | |
13 | * at: | |
14 | * | |
15 | * Attn: CUPS Licensing Information | |
16 | * Easy Software Products | |
17 | * 44141 Airport View Drive, Suite 204 | |
18 | * Hollywood, Maryland 20636 USA | |
19 | * | |
20 | * Voice: (301) 373-9600 | |
21 | * EMail: cups-info@cups.org | |
22 | * WWW: http://www.cups.org | |
23 | * | |
24 | * This file is subject to the Apple OS-Developed Software exception. | |
25 | * | |
26 | * Contents: | |
27 | * | |
28 | * _cups_vsnprintf() - Format a string into a fixed size buffer. | |
29 | * _cups_snprintf() - Format a string into a fixed size buffer. | |
30 | */ | |
31 | ||
32 | /* | |
33 | * Include necessary headers... | |
34 | */ | |
35 | ||
36 | #include <stdio.h> | |
37 | #include <ctype.h> | |
38 | #include "string.h" | |
39 | ||
40 | ||
41 | #ifndef HAVE_VSNPRINTF | |
42 | /* | |
43 | * '_cups_vsnprintf()' - Format a string into a fixed size buffer. | |
44 | */ | |
45 | ||
46 | int /* O - Number of bytes formatted */ | |
47 | _cups_vsnprintf(char *buffer, /* O - Output buffer */ | |
48 | size_t bufsize, /* O - Size of output buffer */ | |
49 | const char *format, /* I - printf-style format string */ | |
50 | va_list ap) /* I - Pointer to additional arguments */ | |
51 | { | |
52 | char *bufptr, /* Pointer to position in buffer */ | |
53 | *bufend, /* Pointer to end of buffer */ | |
54 | sign, /* Sign of format width */ | |
55 | size, /* Size character (h, l, L) */ | |
56 | type; /* Format type character */ | |
57 | int width, /* Width of field */ | |
58 | prec; /* Number of characters of precision */ | |
59 | char tformat[100], /* Temporary format string for sprintf() */ | |
60 | *tptr, /* Pointer into temporary format */ | |
61 | temp[1024]; /* Buffer for formatted numbers */ | |
62 | char *s; /* Pointer to string */ | |
63 | int slen; /* Length of string */ | |
64 | int bytes; /* Total number of bytes needed */ | |
65 | ||
66 | ||
67 | /* | |
68 | * Loop through the format string, formatting as needed... | |
69 | */ | |
70 | ||
71 | bufptr = buffer; | |
72 | bufend = buffer + bufsize - 1; | |
73 | bytes = 0; | |
74 | ||
75 | while (*format) | |
76 | { | |
77 | if (*format == '%') | |
78 | { | |
79 | tptr = tformat; | |
80 | *tptr++ = *format++; | |
81 | ||
82 | if (*format == '%') | |
83 | { | |
84 | if (bufptr && bufptr < bufend) *bufptr++ = *format; | |
85 | bytes ++; | |
86 | format ++; | |
87 | continue; | |
88 | } | |
89 | else if (strchr(" -+#\'", *format)) | |
90 | { | |
91 | *tptr++ = *format; | |
92 | sign = *format++; | |
93 | } | |
94 | else | |
95 | sign = 0; | |
96 | ||
97 | if (*format == '*') | |
98 | { | |
99 | // Get width from argument... | |
100 | format ++; | |
101 | width = va_arg(ap, int); | |
102 | ||
103 | snprintf(tptr, sizeof(tformat) - (tptr - tformat), "%d", width); | |
104 | tptr += strlen(tptr); | |
105 | } | |
106 | else | |
107 | { | |
108 | width = 0; | |
109 | ||
110 | while (isdigit(*format & 255)) | |
111 | { | |
112 | if (tptr < (tformat + sizeof(tformat) - 1)) | |
113 | *tptr++ = *format; | |
114 | ||
115 | width = width * 10 + *format++ - '0'; | |
116 | } | |
117 | } | |
118 | ||
119 | if (*format == '.') | |
120 | { | |
121 | if (tptr < (tformat + sizeof(tformat) - 1)) | |
122 | *tptr++ = *format; | |
123 | ||
124 | format ++; | |
125 | ||
126 | if (*format == '*') | |
127 | { | |
128 | // Get precision from argument... | |
129 | format ++; | |
130 | prec = va_arg(ap, int); | |
131 | ||
132 | snprintf(tptr, sizeof(tformat) - (tptr - tformat), "%d", prec); | |
133 | tptr += strlen(tptr); | |
134 | } | |
135 | else | |
136 | { | |
137 | prec = 0; | |
138 | ||
139 | while (isdigit(*format & 255)) | |
140 | { | |
141 | if (tptr < (tformat + sizeof(tformat) - 1)) | |
142 | *tptr++ = *format; | |
143 | ||
144 | prec = prec * 10 + *format++ - '0'; | |
145 | } | |
146 | } | |
147 | } | |
148 | else | |
149 | prec = -1; | |
150 | ||
151 | if (*format == 'l' && format[1] == 'l') | |
152 | { | |
153 | size = 'L'; | |
154 | ||
155 | if (tptr < (tformat + sizeof(tformat) - 2)) | |
156 | { | |
157 | *tptr++ = 'l'; | |
158 | *tptr++ = 'l'; | |
159 | } | |
160 | ||
161 | format += 2; | |
162 | } | |
163 | else if (*format == 'h' || *format == 'l' || *format == 'L') | |
164 | { | |
165 | if (tptr < (tformat + sizeof(tformat) - 1)) | |
166 | *tptr++ = *format; | |
167 | ||
168 | size = *format++; | |
169 | } | |
170 | ||
171 | if (!*format) | |
172 | break; | |
173 | ||
174 | if (tptr < (tformat + sizeof(tformat) - 1)) | |
175 | *tptr++ = *format; | |
176 | ||
177 | type = *format++; | |
178 | *tptr = '\0'; | |
179 | ||
180 | switch (type) | |
181 | { | |
182 | case 'E' : /* Floating point formats */ | |
183 | case 'G' : | |
184 | case 'e' : | |
185 | case 'f' : | |
186 | case 'g' : | |
187 | if ((width + 2) > sizeof(temp)) | |
188 | break; | |
189 | ||
190 | sprintf(temp, tformat, va_arg(ap, double)); | |
191 | ||
192 | bytes += strlen(temp); | |
193 | ||
194 | if (bufptr) | |
195 | { | |
196 | if ((bufptr + strlen(temp)) > bufend) | |
197 | { | |
198 | strncpy(bufptr, temp, (size_t)(bufend - bufptr)); | |
199 | bufptr = bufend; | |
200 | } | |
201 | else | |
202 | { | |
203 | strcpy(bufptr, temp); | |
204 | bufptr += strlen(temp); | |
205 | } | |
206 | } | |
207 | break; | |
208 | ||
209 | case 'B' : /* Integer formats */ | |
210 | case 'X' : | |
211 | case 'b' : | |
212 | case 'd' : | |
213 | case 'i' : | |
214 | case 'o' : | |
215 | case 'u' : | |
216 | case 'x' : | |
217 | if ((width + 2) > sizeof(temp)) | |
218 | break; | |
219 | ||
220 | sprintf(temp, tformat, va_arg(ap, int)); | |
221 | ||
222 | bytes += strlen(temp); | |
223 | ||
224 | if (bufptr) | |
225 | { | |
226 | if ((bufptr + strlen(temp)) > bufend) | |
227 | { | |
228 | strncpy(bufptr, temp, (size_t)(bufend - bufptr)); | |
229 | bufptr = bufend; | |
230 | } | |
231 | else | |
232 | { | |
233 | strcpy(bufptr, temp); | |
234 | bufptr += strlen(temp); | |
235 | } | |
236 | } | |
237 | break; | |
238 | ||
239 | case 'p' : /* Pointer value */ | |
240 | if ((width + 2) > sizeof(temp)) | |
241 | break; | |
242 | ||
243 | sprintf(temp, tformat, va_arg(ap, void *)); | |
244 | ||
245 | bytes += strlen(temp); | |
246 | ||
247 | if (bufptr) | |
248 | { | |
249 | if ((bufptr + strlen(temp)) > bufend) | |
250 | { | |
251 | strncpy(bufptr, temp, (size_t)(bufend - bufptr)); | |
252 | bufptr = bufend; | |
253 | } | |
254 | else | |
255 | { | |
256 | strcpy(bufptr, temp); | |
257 | bufptr += strlen(temp); | |
258 | } | |
259 | } | |
260 | break; | |
261 | ||
262 | case 'c' : /* Character or character array */ | |
263 | bytes += width; | |
264 | ||
265 | if (bufptr) | |
266 | { | |
267 | if (width <= 1) | |
268 | *bufptr++ = va_arg(ap, int); | |
269 | else | |
270 | { | |
271 | if ((bufptr + width) > bufend) | |
272 | width = bufend - bufptr; | |
273 | ||
274 | memcpy(bufptr, va_arg(ap, char *), (size_t)width); | |
275 | bufptr += width; | |
276 | } | |
277 | } | |
278 | break; | |
279 | ||
280 | case 's' : /* String */ | |
281 | if ((s = va_arg(ap, char *)) == NULL) | |
282 | s = "(null)"; | |
283 | ||
284 | slen = strlen(s); | |
285 | if (slen > width && prec != width) | |
286 | width = slen; | |
287 | ||
288 | bytes += width; | |
289 | ||
290 | if (bufptr) | |
291 | { | |
292 | if ((bufptr + width) > bufend) | |
293 | width = bufend - bufptr; | |
294 | ||
295 | if (slen > width) | |
296 | slen = width; | |
297 | ||
298 | if (sign == '-') | |
299 | { | |
300 | strncpy(bufptr, s, (size_t)slen); | |
301 | memset(bufptr + slen, ' ', (size_t)(width - slen)); | |
302 | } | |
303 | else | |
304 | { | |
305 | memset(bufptr, ' ', (size_t)(width - slen)); | |
306 | strncpy(bufptr + width - slen, s, (size_t)slen); | |
307 | } | |
308 | ||
309 | bufptr += width; | |
310 | } | |
311 | break; | |
312 | ||
313 | case 'n' : /* Output number of chars so far */ | |
314 | *(va_arg(ap, int *)) = bytes; | |
315 | break; | |
316 | } | |
317 | } | |
318 | else | |
319 | { | |
320 | bytes ++; | |
321 | ||
322 | if (bufptr && bufptr < bufend) | |
323 | *bufptr++ = *format; | |
324 | ||
325 | format ++; | |
326 | } | |
327 | } | |
328 | ||
329 | /* | |
330 | * Nul-terminate the string and return the number of characters needed. | |
331 | */ | |
332 | ||
333 | *bufptr = '\0'; | |
334 | ||
335 | return (bytes); | |
336 | } | |
337 | #endif /* !HAVE_VSNPRINT */ | |
338 | ||
339 | ||
340 | #ifndef HAVE_SNPRINTF | |
341 | /* | |
342 | * '_cups_snprintf()' - Format a string into a fixed size buffer. | |
343 | */ | |
344 | ||
345 | int /* O - Number of bytes formatted */ | |
346 | _cups_snprintf(char *buffer, /* O - Output buffer */ | |
347 | size_t bufsize, /* O - Size of output buffer */ | |
348 | const char *format, /* I - printf-style format string */ | |
349 | ...) /* I - Additional arguments as needed */ | |
350 | { | |
351 | int bytes; /* Number of bytes formatted */ | |
352 | va_list ap; /* Pointer to additional arguments */ | |
353 | ||
354 | ||
355 | va_start(ap, format); | |
356 | bytes = vsnprintf(buffer, bufsize, format, ap); | |
357 | va_end(ap); | |
358 | ||
359 | return (bytes); | |
360 | } | |
361 | #endif /* !HAVE_SNPRINTF */ | |
362 | ||
363 | ||
364 | /* | |
365 | * End of "$Id: snprintf.c 4683 2005-09-21 22:17:44Z mike $". | |
366 | */ | |
367 |