1 | /* |
---|
2 | * misc.c -- Miscellaneous routines. |
---|
3 | * |
---|
4 | * Copyright (c) GoAhead Software Inc., 1995-1999. All Rights Reserved. |
---|
5 | * |
---|
6 | * See the file "license.txt" for usage and redistribution license requirements |
---|
7 | */ |
---|
8 | |
---|
9 | /********************************* Includes ***********************************/ |
---|
10 | |
---|
11 | #if UEMF |
---|
12 | #include "uemf.h" |
---|
13 | #else |
---|
14 | #include "basic/basicInternal.h" |
---|
15 | #endif |
---|
16 | |
---|
17 | /********************************* Defines ************************************/ |
---|
18 | /* |
---|
19 | * Sprintf buffer structure. Make the increment 8 less than 64 so that |
---|
20 | * a balloc can use a 64 byte block. |
---|
21 | */ |
---|
22 | |
---|
23 | #define STR_REALLOC 0x1 /* Reallocate the buffer as required */ |
---|
24 | #define STR_INC 58 /* Growth increment */ |
---|
25 | |
---|
26 | typedef struct { |
---|
27 | char_t *s; /* Pointer to buffer */ |
---|
28 | int size; /* Current buffer size */ |
---|
29 | int max; /* Maximum buffer size */ |
---|
30 | int count; /* Buffer count */ |
---|
31 | int flags; /* Allocation flags */ |
---|
32 | } strbuf_t; |
---|
33 | |
---|
34 | /* |
---|
35 | * Sprintf formatting flags |
---|
36 | */ |
---|
37 | enum flag { |
---|
38 | flag_none = 0, |
---|
39 | flag_minus = 1, |
---|
40 | flag_plus = 2, |
---|
41 | flag_space = 4, |
---|
42 | flag_hash = 8, |
---|
43 | flag_zero = 16, |
---|
44 | flag_short = 32, |
---|
45 | flag_long = 64 |
---|
46 | }; |
---|
47 | |
---|
48 | /************************** Forward Declarations ******************************/ |
---|
49 | |
---|
50 | static int dsnprintf(char_t **s, int size, char_t *fmt, va_list arg, |
---|
51 | int msize); |
---|
52 | static int strnlen(char_t *s, unsigned int n); |
---|
53 | static void put_char(strbuf_t *buf, char_t c); |
---|
54 | static void put_string(strbuf_t *buf, char_t *s, int len, |
---|
55 | int width, int prec, enum flag f); |
---|
56 | static void put_ulong(strbuf_t *buf, unsigned long int value, int base, |
---|
57 | int upper, char_t *prefix, int width, int prec, enum flag f); |
---|
58 | |
---|
59 | /************************************ Code ************************************/ |
---|
60 | /* |
---|
61 | * "basename" returns a pointer to the last component of a pathname |
---|
62 | * LINUX, RTEMS, and LynxOS have their own basename function |
---|
63 | */ |
---|
64 | |
---|
65 | #if ! LINUX & ! __rtems__ & ! LYNX |
---|
66 | char_t *basename(char_t* name) |
---|
67 | { |
---|
68 | char_t *cp; |
---|
69 | |
---|
70 | #if NW || WIN |
---|
71 | if (((cp = gstrrchr(name, '\\')) == NULL) && |
---|
72 | ((cp = gstrrchr(name, '/')) == NULL)) { |
---|
73 | return name; |
---|
74 | #else |
---|
75 | if ((cp = gstrrchr(name, '/')) == NULL) { |
---|
76 | return name; |
---|
77 | #endif |
---|
78 | } else if (*(cp + 1) == '\0' && cp == name) { |
---|
79 | return name; |
---|
80 | } else if (*(cp + 1) == '\0' && cp != name) { |
---|
81 | return T(""); |
---|
82 | } else { |
---|
83 | return ++cp; |
---|
84 | } |
---|
85 | } |
---|
86 | #endif /* ! LINUX && ! __rtems__ && ! LYNX */ |
---|
87 | |
---|
88 | /******************************************************************************/ |
---|
89 | /* |
---|
90 | * Returns a pointer to the directory component of a pathname. bufsize is |
---|
91 | * the size of the buffer in BYTES! |
---|
92 | */ |
---|
93 | |
---|
94 | char_t *dirname(char_t* buf, char_t* name, int bufsize) |
---|
95 | { |
---|
96 | char_t* cp; |
---|
97 | int len; |
---|
98 | |
---|
99 | a_assert(name); |
---|
100 | a_assert(buf); |
---|
101 | a_assert(bufsize > 0); |
---|
102 | |
---|
103 | #if WIN || NW |
---|
104 | if ((cp = gstrrchr(name, '/')) == NULL && |
---|
105 | (cp = gstrrchr(name, '\\')) == NULL) |
---|
106 | #else |
---|
107 | if ((cp = gstrrchr(name, '/')) == NULL) |
---|
108 | #endif |
---|
109 | { |
---|
110 | gstrcpy(buf, T(".")); |
---|
111 | return buf; |
---|
112 | } |
---|
113 | |
---|
114 | if ((*(cp + 1) == '\0' && cp == name)) { |
---|
115 | gstrncpy(buf, T("."), TSZ(bufsize)); |
---|
116 | gstrcpy(buf, T(".")); |
---|
117 | return buf; |
---|
118 | } |
---|
119 | |
---|
120 | len = cp - name; |
---|
121 | |
---|
122 | if (len < bufsize) { |
---|
123 | gstrncpy(buf, name, len); |
---|
124 | buf[len] = '\0'; |
---|
125 | } else { |
---|
126 | gstrncpy(buf, name, TSZ(bufsize)); |
---|
127 | buf[bufsize - 1] = '\0'; |
---|
128 | } |
---|
129 | |
---|
130 | return buf; |
---|
131 | } |
---|
132 | |
---|
133 | /******************************************************************************/ |
---|
134 | /* |
---|
135 | * sprintf and vsprintf are bad, ok. You can easily clobber memory. Use |
---|
136 | * gsnprintf and gvsnprintf instead! These functions do _not_ support floating |
---|
137 | * point, like %e, %f, %g... |
---|
138 | */ |
---|
139 | |
---|
140 | int gsnprintf(char_t **s, int n, char_t *fmt, ...) |
---|
141 | { |
---|
142 | va_list ap; |
---|
143 | int result; |
---|
144 | |
---|
145 | a_assert(s); |
---|
146 | a_assert(fmt); |
---|
147 | |
---|
148 | *s = NULL; |
---|
149 | va_start(ap, fmt); |
---|
150 | result = gvsnprintf(s, n, fmt, ap); |
---|
151 | va_end(ap); |
---|
152 | return result; |
---|
153 | } |
---|
154 | |
---|
155 | /******************************************************************************/ |
---|
156 | /* |
---|
157 | * This function appends the formatted string to the supplied string, |
---|
158 | * reallocing if required. |
---|
159 | */ |
---|
160 | |
---|
161 | int gsprintfRealloc(char_t **s, int n, int msize, char_t *fmt, ...) |
---|
162 | { |
---|
163 | va_list ap; |
---|
164 | int result; |
---|
165 | |
---|
166 | a_assert(s); |
---|
167 | a_assert(fmt); |
---|
168 | |
---|
169 | if (msize == -1) { |
---|
170 | *s = NULL; |
---|
171 | } |
---|
172 | va_start(ap, fmt); |
---|
173 | result = dsnprintf(s, n, fmt, ap, msize); |
---|
174 | va_end(ap); |
---|
175 | return result; |
---|
176 | } |
---|
177 | |
---|
178 | /******************************************************************************/ |
---|
179 | /* |
---|
180 | * A vsprintf replacement. |
---|
181 | */ |
---|
182 | |
---|
183 | int gvsnprintf(char_t **s, int n, char_t *fmt, va_list arg) |
---|
184 | { |
---|
185 | a_assert(s); |
---|
186 | a_assert(fmt); |
---|
187 | |
---|
188 | return dsnprintf(s, n, fmt, arg, 0); |
---|
189 | } |
---|
190 | |
---|
191 | /******************************************************************************/ |
---|
192 | /* |
---|
193 | * Dynamic sprintf implementation. Supports dynamic buffer allocation also. |
---|
194 | * This function can be called multiple times to grow an existing allocated |
---|
195 | * buffer. In this case, msize is set to the size of the previously allocated |
---|
196 | * buffer. The buffer will be realloced, as required. If msize is set, we |
---|
197 | * return the size of the allocated buffer for use with the next call. For |
---|
198 | * the first call, msize can be set to -1. |
---|
199 | */ |
---|
200 | |
---|
201 | static int dsnprintf(char_t **s, int size, char_t *fmt, va_list arg, int msize) |
---|
202 | { |
---|
203 | strbuf_t buf; |
---|
204 | char_t c; |
---|
205 | |
---|
206 | a_assert(s); |
---|
207 | a_assert(fmt); |
---|
208 | |
---|
209 | memset(&buf, 0, sizeof(buf)); |
---|
210 | buf.s = *s; |
---|
211 | |
---|
212 | if (*s == NULL || msize != 0) { |
---|
213 | buf.max = size; |
---|
214 | buf.flags |= STR_REALLOC; |
---|
215 | if (msize != 0) { |
---|
216 | buf.size = max(msize, 0); |
---|
217 | } |
---|
218 | if (*s != NULL && msize != 0) { |
---|
219 | buf.count = gstrlen(*s); |
---|
220 | } |
---|
221 | } else { |
---|
222 | buf.size = size; |
---|
223 | } |
---|
224 | |
---|
225 | while ((c = *fmt++) != '\0') { |
---|
226 | if (c != '%' || (c = *fmt++) == '%') { |
---|
227 | put_char(&buf, c); |
---|
228 | } else { |
---|
229 | enum flag f = flag_none; |
---|
230 | int width = 0; |
---|
231 | int prec = -1; |
---|
232 | for ( ; c != '\0'; c = *fmt++) { |
---|
233 | if (c == '-') { |
---|
234 | f |= flag_minus; |
---|
235 | } else if (c == '+') { |
---|
236 | f |= flag_plus; |
---|
237 | } else if (c == ' ') { |
---|
238 | f |= flag_space; |
---|
239 | } else if (c == '#') { |
---|
240 | f |= flag_hash; |
---|
241 | } else if (c == '0') { |
---|
242 | f |= flag_zero; |
---|
243 | } else { |
---|
244 | break; |
---|
245 | } |
---|
246 | } |
---|
247 | if (c == '*') { |
---|
248 | width = va_arg(arg, int); |
---|
249 | if (width < 0) { |
---|
250 | f |= flag_minus; |
---|
251 | width = -width; |
---|
252 | } |
---|
253 | c = *fmt++; |
---|
254 | } else { |
---|
255 | for ( ; gisdigit(c); c = *fmt++) { |
---|
256 | width = width * 10 + (c - '0'); |
---|
257 | } |
---|
258 | } |
---|
259 | if (c == '.') { |
---|
260 | f &= ~flag_zero; |
---|
261 | c = *fmt++; |
---|
262 | if (c == '*') { |
---|
263 | prec = va_arg(arg, int); |
---|
264 | c = *fmt++; |
---|
265 | } else { |
---|
266 | for (prec = 0; gisdigit(c); c = *fmt++) { |
---|
267 | prec = prec * 10 + (c - '0'); |
---|
268 | } |
---|
269 | } |
---|
270 | } |
---|
271 | if (c == 'h' || c == 'l') { |
---|
272 | f |= (c == 'h' ? flag_short : flag_long); |
---|
273 | c = *fmt++; |
---|
274 | } |
---|
275 | if (c == 'd' || c == 'i') { |
---|
276 | long int value; |
---|
277 | if (f & flag_short) { |
---|
278 | value = (short int) va_arg(arg, int); |
---|
279 | } else if (f & flag_long) { |
---|
280 | value = va_arg(arg, long int); |
---|
281 | } else { |
---|
282 | value = va_arg(arg, int); |
---|
283 | } |
---|
284 | if (value >= 0) { |
---|
285 | if (f & flag_plus) { |
---|
286 | put_ulong(&buf, value, 10, 0, T("+"), width, prec, f); |
---|
287 | } else if (f & flag_space) { |
---|
288 | put_ulong(&buf, value, 10, 0, T(" "), width, prec, f); |
---|
289 | } else { |
---|
290 | put_ulong(&buf, value, 10, 0, NULL, width, prec, f); |
---|
291 | } |
---|
292 | } else { |
---|
293 | put_ulong(&buf, -value, 10, 0, T("-"), width, prec, f); |
---|
294 | } |
---|
295 | } else if (c == 'o' || c == 'u' || c == 'x' || c == 'X') { |
---|
296 | unsigned long int value; |
---|
297 | if (f & flag_short) { |
---|
298 | value = (unsigned short int) va_arg(arg, unsigned int); |
---|
299 | } else if (f & flag_long) { |
---|
300 | value = va_arg(arg, unsigned long int); |
---|
301 | } else { |
---|
302 | value = va_arg(arg, unsigned int); |
---|
303 | } |
---|
304 | if (c == 'o') { |
---|
305 | if (f & flag_hash && value != 0) { |
---|
306 | put_ulong(&buf, value, 8, 0, T("0"), width, prec, f); |
---|
307 | } else { |
---|
308 | put_ulong(&buf, value, 8, 0, NULL, width, prec, f); |
---|
309 | } |
---|
310 | } else if (c == 'u') { |
---|
311 | put_ulong(&buf, value, 10, 0, NULL, width, prec, f); |
---|
312 | } else { |
---|
313 | if (f & flag_hash && value != 0) { |
---|
314 | if (c == 'x') { |
---|
315 | put_ulong(&buf, value, 16, 0, T("0x"), width, |
---|
316 | prec, f); |
---|
317 | } else { |
---|
318 | put_ulong(&buf, value, 16, 1, T("0X"), width, |
---|
319 | prec, f); |
---|
320 | } |
---|
321 | } else { |
---|
322 | put_ulong(&buf, value, 16, 0, NULL, width, prec, f); |
---|
323 | } |
---|
324 | } |
---|
325 | |
---|
326 | } else if (c == 'c') { |
---|
327 | char_t value = va_arg(arg, int); |
---|
328 | put_char(&buf, value); |
---|
329 | |
---|
330 | } else if (c == 's' || c == 'S') { |
---|
331 | char_t *value = va_arg(arg, char_t *); |
---|
332 | if (value == NULL) { |
---|
333 | put_string(&buf, T("(null)"), -1, width, prec, f); |
---|
334 | } else if (f & flag_hash) { |
---|
335 | put_string(&buf, |
---|
336 | value + 1, (char_t) *value, width, prec, f); |
---|
337 | } else { |
---|
338 | put_string(&buf, value, -1, width, prec, f); |
---|
339 | } |
---|
340 | } else if (c == 'p') { |
---|
341 | void *value = va_arg(arg, void *); |
---|
342 | put_ulong(&buf, |
---|
343 | (unsigned long int) value, 16, 0, T("0x"), width, prec, f); |
---|
344 | } else if (c == 'n') { |
---|
345 | if (f & flag_short) { |
---|
346 | short int *value = va_arg(arg, short int *); |
---|
347 | *value = buf.count; |
---|
348 | } else if (f & flag_long) { |
---|
349 | long int *value = va_arg(arg, long int *); |
---|
350 | *value = buf.count; |
---|
351 | } else { |
---|
352 | int *value = va_arg(arg, int *); |
---|
353 | *value = buf.count; |
---|
354 | } |
---|
355 | } else { |
---|
356 | put_char(&buf, c); |
---|
357 | } |
---|
358 | } |
---|
359 | } |
---|
360 | if (buf.s == NULL) { |
---|
361 | put_char(&buf, '\0'); |
---|
362 | } |
---|
363 | |
---|
364 | /* |
---|
365 | * If the user requested a dynamic buffer (*s == NULL), ensure it is returned. |
---|
366 | */ |
---|
367 | if (*s == NULL || msize != 0) { |
---|
368 | *s = buf.s; |
---|
369 | } |
---|
370 | |
---|
371 | if (*s != NULL && size > 0) { |
---|
372 | if (buf.count < size) { |
---|
373 | (*s)[buf.count] = '\0'; |
---|
374 | } else { |
---|
375 | (*s)[buf.size - 1] = '\0'; |
---|
376 | } |
---|
377 | } |
---|
378 | |
---|
379 | if (msize != 0) { |
---|
380 | return buf.size; |
---|
381 | } |
---|
382 | return buf.count; |
---|
383 | } |
---|
384 | |
---|
385 | /******************************************************************************/ |
---|
386 | /* |
---|
387 | * Return the length of a string limited by a given length |
---|
388 | */ |
---|
389 | |
---|
390 | static int strnlen(char_t *s, unsigned int n) |
---|
391 | { |
---|
392 | unsigned int len; |
---|
393 | |
---|
394 | len = gstrlen(s); |
---|
395 | return min(len, n); |
---|
396 | } |
---|
397 | |
---|
398 | /******************************************************************************/ |
---|
399 | /* |
---|
400 | * Add a character to a string buffer |
---|
401 | */ |
---|
402 | |
---|
403 | static void put_char(strbuf_t *buf, char_t c) |
---|
404 | { |
---|
405 | if (buf->count >= buf->size) { |
---|
406 | if (! (buf->flags & STR_REALLOC)) { |
---|
407 | return; |
---|
408 | } |
---|
409 | buf->size += STR_INC; |
---|
410 | if (buf->size > buf->max && buf->size > STR_INC) { |
---|
411 | a_assert(buf->size <= buf->max); |
---|
412 | buf->size -= STR_INC; |
---|
413 | return; |
---|
414 | } |
---|
415 | if (buf->s == NULL) { |
---|
416 | buf->s = balloc(B_L, buf->size * sizeof(char_t*)); |
---|
417 | } else { |
---|
418 | buf->s = brealloc(B_L, buf->s, buf->size * sizeof(char_t*)); |
---|
419 | } |
---|
420 | } |
---|
421 | buf->s[buf->count] = c; |
---|
422 | ++buf->count; |
---|
423 | } |
---|
424 | |
---|
425 | /******************************************************************************/ |
---|
426 | /* |
---|
427 | * Add a string to a string buffer |
---|
428 | */ |
---|
429 | |
---|
430 | static void put_string(strbuf_t *buf, char_t *s, int len, int width, |
---|
431 | int prec, enum flag f) |
---|
432 | { |
---|
433 | int i; |
---|
434 | |
---|
435 | if (len < 0) { |
---|
436 | len = strnlen(s, prec >= 0 ? prec : ULONG_MAX); |
---|
437 | } else if (prec >= 0 && prec < len) { |
---|
438 | len = prec; |
---|
439 | } |
---|
440 | if (width > len && !(f & flag_minus)) { |
---|
441 | for (i = len; i < width; ++i) { |
---|
442 | put_char(buf, ' '); |
---|
443 | } |
---|
444 | } |
---|
445 | for (i = 0; i < len; ++i) { |
---|
446 | put_char(buf, s[i]); |
---|
447 | } |
---|
448 | if (width > len && f & flag_minus) { |
---|
449 | for (i = len; i < width; ++i) { |
---|
450 | put_char(buf, ' '); |
---|
451 | } |
---|
452 | } |
---|
453 | } |
---|
454 | |
---|
455 | /******************************************************************************/ |
---|
456 | /* |
---|
457 | * Add a long to a string buffer |
---|
458 | */ |
---|
459 | |
---|
460 | static void put_ulong(strbuf_t *buf, unsigned long int value, int base, |
---|
461 | int upper, char_t *prefix, int width, int prec, enum flag f) |
---|
462 | { |
---|
463 | unsigned long x, x2; |
---|
464 | int len, zeros, i; |
---|
465 | |
---|
466 | for (len = 1, x = 1; x < ULONG_MAX / base; ++len, x = x2) { |
---|
467 | x2 = x * base; |
---|
468 | if (x2 > value) { |
---|
469 | break; |
---|
470 | } |
---|
471 | } |
---|
472 | zeros = (prec > len) ? prec - len : 0; |
---|
473 | width -= zeros + len; |
---|
474 | if (prefix != NULL) { |
---|
475 | width -= strnlen(prefix, ULONG_MAX); |
---|
476 | } |
---|
477 | if (!(f & flag_minus)) { |
---|
478 | for (i = 0; i < width; ++i) { |
---|
479 | put_char(buf, ' '); |
---|
480 | } |
---|
481 | } |
---|
482 | if (prefix != NULL) { |
---|
483 | put_string(buf, prefix, -1, 0, -1, flag_none); |
---|
484 | } |
---|
485 | for (i = 0; i < zeros; ++i) { |
---|
486 | put_char(buf, '0'); |
---|
487 | } |
---|
488 | for ( ; x > 0; x /= base) { |
---|
489 | int digit = (value / x) % base; |
---|
490 | put_char(buf, (char) ((digit < 10 ? '0' : (upper ? 'A' : 'a') - 10) + |
---|
491 | digit)); |
---|
492 | } |
---|
493 | if (f & flag_minus) { |
---|
494 | for (i = 0; i < width; ++i) { |
---|
495 | put_char(buf, ' '); |
---|
496 | } |
---|
497 | } |
---|
498 | } |
---|
499 | |
---|
500 | /******************************************************************************/ |
---|
501 | /* |
---|
502 | * Convert an ansi string to a unicode string. On an error, we return the |
---|
503 | * original ansi string which is better than returning NULL. nBytes is the |
---|
504 | * size of the destination buffer (ubuf) in _bytes_. |
---|
505 | */ |
---|
506 | |
---|
507 | char_t *ascToUni(char_t *ubuf, char *str, int nBytes) |
---|
508 | { |
---|
509 | #if UNICODE |
---|
510 | if (MultiByteToWideChar(CP_ACP, 0, str, nBytes / sizeof(char_t), ubuf, |
---|
511 | nBytes / sizeof(char_t)) < 0) { |
---|
512 | return (char_t*) str; |
---|
513 | } |
---|
514 | #else |
---|
515 | memcpy(ubuf, str, nBytes); |
---|
516 | #endif |
---|
517 | return ubuf; |
---|
518 | } |
---|
519 | |
---|
520 | /******************************************************************************/ |
---|
521 | /* |
---|
522 | * Convert a unicode string to an ansi string. On an error, return the |
---|
523 | * original unicode string which is better than returning NULL. |
---|
524 | * N.B. nBytes is the number of _bytes_ in the destination buffer, buf. |
---|
525 | */ |
---|
526 | |
---|
527 | char *uniToAsc(char *buf, char_t* ustr, int nBytes) |
---|
528 | { |
---|
529 | #if UNICODE |
---|
530 | if (WideCharToMultiByte(CP_ACP, 0, ustr, nBytes, buf, nBytes, NULL, |
---|
531 | NULL) < 0) { |
---|
532 | return (char*) ustr; |
---|
533 | } |
---|
534 | #else |
---|
535 | memcpy(buf, ustr, nBytes); |
---|
536 | #endif |
---|
537 | return (char*) buf; |
---|
538 | } |
---|
539 | |
---|
540 | |
---|
541 | /******************************************************************************/ |
---|
542 | /* |
---|
543 | * allocate (balloc) a buffer and do ascii to unicode conversion into it. |
---|
544 | * cp points to the ascii string which must be NULL terminated. |
---|
545 | * Return a pointer to the unicode buffer which must be bfree'd later. |
---|
546 | * Return NULL on failure to get buffer. |
---|
547 | */ |
---|
548 | char_t *ballocAscToUni(char * cp) |
---|
549 | { |
---|
550 | char_t * unip; |
---|
551 | int ulen; |
---|
552 | |
---|
553 | ulen = (strlen(cp) + 1) * sizeof(char_t); |
---|
554 | if ((unip = balloc(B_L, ulen)) == NULL) { |
---|
555 | return NULL; |
---|
556 | } |
---|
557 | ascToUni(unip, cp, ulen); |
---|
558 | return unip; |
---|
559 | } |
---|
560 | |
---|
561 | /******************************************************************************/ |
---|
562 | /* |
---|
563 | * allocate (balloc) a buffer and do unicode to ascii conversion into it. |
---|
564 | * unip points to the unicoded string. ulen is the number of characters |
---|
565 | * in the unicode string including teminating null, if there is one. |
---|
566 | * Return a pointer to the ascii buffer which must be bfree'd later. |
---|
567 | * Return NULL on failure to get buffer. |
---|
568 | */ |
---|
569 | char *ballocUniToAsc(char_t * unip, int ulen) |
---|
570 | { |
---|
571 | char * cp; |
---|
572 | |
---|
573 | if ((cp = balloc(B_L, ulen)) == NULL) { |
---|
574 | return NULL; |
---|
575 | } |
---|
576 | uniToAsc(cp, unip, ulen); |
---|
577 | return cp; |
---|
578 | } |
---|
579 | |
---|
580 | /******************************************************************************/ |
---|
581 | |
---|