genwrap.c 15.2 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
/* genwrap.c */

/* General cross-platform development wrappers */

/* $Id$ */

/****************************************************************************
 * @format.tab-size 4		(Plain Text/Source Code File Header)			*
 * @format.use-tabs true	(see http://www.synchro.net/ptsc_hdr.html)		*
 *																			*
11
 * Copyright 2006 Rob Swindell - http://www.synchro.net/copyright.html		*
12
 *																			*
13
14
 * This library is free software; you can redistribute it and/or			*
 * modify it under the terms of the GNU Lesser General Public License		*
15
16
 * as published by the Free Software Foundation; either version 2			*
 * of the License, or (at your option) any later version.					*
17
18
 * See the GNU Lesser General Public License for more details: lgpl.txt or	*
 * http://www.fsf.org/copyleft/lesser.html									*
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
 *																			*
 * Anonymous FTP access to the most recent released source is available at	*
 * ftp://vert.synchro.net, ftp://cvs.synchro.net and ftp://ftp.synchro.net	*
 *																			*
 * Anonymous CVS access to the development source and modification history	*
 * is available at cvs.synchro.net:/cvsroot/sbbs, example:					*
 * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs login			*
 *     (just hit return, no password is necessary)							*
 * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs checkout src		*
 *																			*
 * For Synchronet coding style and modification guidelines, see				*
 * http://www.synchro.net/source.html										*
 *																			*
 * You are encouraged to submit any modifications (preferably in Unix diff	*
 * format) via e-mail to mods@synchro.net									*
 *																			*
 * Note: If this box doesn't appear square, then you need to fix your tabs.	*
 ****************************************************************************/

#include <string.h>     /* strlen() */
deuce's avatar
deuce committed
39
#include <stdarg.h>	/* vsnprintf() */
40
41
42
#include <stdlib.h>		/* RAND_MAX */
#include <fcntl.h>		/* O_NOCTTY */
#include <time.h>		/* clock() */
43
#include <errno.h>		/* errno */
44
#include <ctype.h>		/* toupper/tolower */
rswindell's avatar
rswindell committed
45

46
#if defined(__unix__)
47
	#include <sys/ioctl.h>		/* ioctl() */
48
	#include <sys/utsname.h>	/* uname() */
rswindell's avatar
rswindell committed
49
#endif	/* __unix__ */
50
51

#include "genwrap.h"	/* Verify prototypes */
rswindell's avatar
rswindell committed
52
#include "xpendian.h"	/* BYTE_SWAP */
53

54
55
56
/****************************************************************************/
/* Used to replace snprintf()  guarantees to terminate.			  			*/
/****************************************************************************/
57
int DLLCALL safe_snprintf(char *dst, size_t size, const char *fmt, ...)
58
59
60
61
62
63
64
{
	va_list argptr;
	int     numchars;

	va_start(argptr,fmt);
	numchars= vsnprintf(dst,size,fmt,argptr);
	va_end(argptr);
65
66
67
	dst[size-1]=0;
#ifdef _MSC_VER
	if(numchars==-1)
68
		numchars=strlen(dst);
69
#endif
70
	if(numchars>=(int)size && numchars>0)
71
		numchars=size-1;
72
73
74
	return(numchars);
}

75
/****************************************************************************/
76
77
/* Return last character of string											*/
/****************************************************************************/
78
char* DLLCALL lastchar(const char* str)
79
80
81
82
83
84
{
	size_t	len;

	len = strlen(str);

	if(len)
85
		return((char*)&str[len-1]);
86

87
	return((char*)str);
88
89
90
}

/****************************************************************************/
91
92
/* Return character value of C-escaped (\) character						*/
/****************************************************************************/
93
char DLLCALL c_unescape_char(char ch)
94
95
{
	switch(ch) {
96
		case 'e':	return(ESC);	/* non-standard */
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
		case 'a':	return('\a');
		case 'b':	return('\b');
		case 'f':	return('\f');
		case 'n':	return('\n');
		case 'r':	return('\r');
		case 't':	return('\t');
		case 'v':	return('\v');
	}
	return(ch);
}

/****************************************************************************/
/* Return character value of C-escaped (\) character sequence				*/
/* (supports \Xhh and \0ooo escape sequences)								*/
/* This code currently has problems with sequences like: "\x01blue"			*/
/****************************************************************************/
113
char DLLCALL c_unescape_char_ptr(const char* str, char** endptr)
114
115
116
117
118
119
120
121
{
	char	ch;

	if(toupper(*str)=='X')
		ch=(char)strtol(++str,endptr,16);
	else if(isdigit(*str))
		ch=(char)strtol(++str,endptr,8);
	else {
122
		ch=c_unescape_char(*(str++));
123
124
125
126
127
128
129
130
131
132
		if(endptr!=NULL)
			*endptr=(char*)str;
	}

	return(ch);
}

/****************************************************************************/
/* Unescape a C string, in place											*/
/****************************************************************************/
133
char* DLLCALL c_unescape_str(char* str)
134
135
136
137
138
139
140
141
142
143
144
145
146
{
	char	ch;
	char*	buf;
	char*	src;
	char*	dst;

	if(str==NULL || (buf=strdup(str))==NULL)
		return(NULL);

	src=buf;
	dst=str;
	while((ch=*(src++))!=0) {
		if(ch=='\\')	/* escape */
147
			ch=c_unescape_char_ptr(src,&src);
148
149
150
151
152
153
154
		*(dst++)=ch;
	}
	*dst=0;
	free(buf);
	return(str);
}

155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
char* DLLCALL c_escape_char(char ch)
{
	switch(ch) {
		case 0:		return("\\x00");
		case 1:		return("\\x01");
		case ESC:	return("\\e");		/* non-standard */
		case '\a':	return("\\a");
		case '\b':	return("\\b");
		case '\f':	return("\\f");
		case '\n':	return("\\n");
		case '\r':	return("\\r");
		case '\t':	return("\\t");
		case '\v':	return("\\v");
		case '\\':	return("\\\\");
		case '\"':	return("\\\"");
		case '\'':	return("\\'");
	}
	return(NULL);
}

char* DLLCALL c_escape_str(const char* src, char* dst, size_t maxlen, BOOL ctrl_only)
{
	const char*	s;
	char*	d;
	char*	e;

	for(s=src,d=dst;*s && (size_t)(d-dst)<maxlen;s++,d++) {
		if((!ctrl_only || (uchar)*s < ' ') && (e=c_escape_char(*s))!=NULL) {
			*d=0;
			strncat(dst,e,maxlen-(d-dst));
			d++;
		} else *d=*s;
	}
	*d=0;

	return(dst);
}

193
/****************************************************************************/
194
195
/* Convert ASCIIZ string to upper case										*/
/****************************************************************************/
196
#if defined(__unix__)
197
char* DLLCALL strupr(char* str)
198
199
200
201
202
203
204
205
206
207
208
209
{
	char*	p=str;

	while(*p) {
		*p=toupper(*p);
		p++;
	}
	return(str);
}
/****************************************************************************/
/* Convert ASCIIZ string to lower case										*/
/****************************************************************************/
210
char* DLLCALL strlwr(char* str)
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
{
	char*	p=str;

	while(*p) {
		*p=tolower(*p);
		p++;
	}
	return(str);
}
/****************************************************************************/
/* Reverse characters of a string (provided by amcleod)						*/
/****************************************************************************/
char* strrev(char* str)
{
    char t, *i=str, *j=str+strlen(str);

    while (i<j) {
        t=*i; *(i++)=*(--j); *j=t;
    }
    return str;
}
#endif

234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
#if !defined(__unix__)

/****************************************************************************/
/* Implementations of the recursive (thread-safe) version of strtok			*/
/* Thanks to Apache Portable Runtime (APR)									*/
/****************************************************************************/
char* DLLCALL strtok_r(char *str, const char *delim, char **last)
{
    char* token;

    if (str==NULL)      /* subsequent call */
        str = *last;    /* start where we left off */

    /* skip characters in delimiter (will terminate at '\0') */
    while(*str && strchr(delim, *str))
        ++str;

    if(!*str)          /* no more tokens */
        return NULL;

    token = str;

    /* skip valid token characters to terminate token and
     * prepare for the next call (will terminate at '\0)
     */
    *last = token + 1;
    while(**last && !strchr(delim, **last))
        ++*last;

    if (**last) {
        **last = '\0';
        ++*last;
    }

    return token;
}

#endif

rswindell's avatar
rswindell committed
273
274
275
276
277
/****************************************************************************/
/* Initialize (seed) the random number generator							*/
/****************************************************************************/
unsigned DLLCALL xp_randomize(void)
{
rswindell's avatar
rswindell committed
278
	unsigned seed=~0;
rswindell's avatar
rswindell committed
279

280
#if defined(HAS_DEV_URANDOM) && defined(URANDOM_DEV)
rswindell's avatar
rswindell committed
281
282
	int     rf;

283
	if((rf=open(URANDOM_DEV, O_RDONLY))!=-1) {
rswindell's avatar
rswindell committed
284
285
286
		read(rf, &seed, sizeof(seed));
		close(rf);
	}
287
288
289
290
	else {
#endif
		unsigned curtime	= (unsigned)time(NULL);
		unsigned process_id = (unsigned)GetCurrentProcessId();
rswindell's avatar
rswindell committed
291

292
		seed = curtime ^ BYTE_SWAP_INT(process_id);
rswindell's avatar
rswindell committed
293

294
295
296
		#if defined(_WIN32) || defined(GetCurrentThreadId)
			seed ^= (unsigned)GetCurrentThreadId();
		#endif
rswindell's avatar
rswindell committed
297

298
299
#if defined(HAS_DEV_URANDOM) && defined(URANDOM_DEV)
	}
rswindell's avatar
rswindell committed
300
301
#endif

302
303
304
305
#ifdef HAS_RANDOM_FUNC
 	srandom(seed);
	return(seed);
#else
rswindell's avatar
rswindell committed
306
307
 	srand(seed);
	return(seed);
308
#endif
rswindell's avatar
rswindell committed
309
310
}

311
312
313
314
315
/****************************************************************************/
/* Return random number between 0 and n-1									*/
/****************************************************************************/
int DLLCALL xp_random(int n)
{
316
#ifdef HAS_RANDOM_FUNC
317
318
	if(n<2)
		return(0);
319
320
	return(random()%n);
#else
321
	float f=0;
322
323
324
325
326
327

	if(n<2)
		return(0);
	f=(float)rand()/(float)RAND_MAX;

	return((int)(n*f));
328
#endif
329
330
}

331
332
333
334
/****************************************************************************/
/* Return ASCII string representation of ulong								*/
/* There may be a native GNU C Library function to this...					*/
/****************************************************************************/
rswindell's avatar
rswindell committed
335
#if !defined(_MSC_VER) && !defined(__BORLANDC__) && !defined(__WATCOMC__)
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
char* DLLCALL ultoa(ulong val, char* str, int radix)
{
	switch(radix) {
		case 8:
			sprintf(str,"%lo",val);
			break;
		case 10:
			sprintf(str,"%lu",val);
			break;
		case 16:
			sprintf(str,"%lx",val);
			break;
		default:
			sprintf(str,"bad radix: %d",radix);
			break;
	}
	return(str);
}
#endif

356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
/****************************************************************************/
/* Write the version details of the current operating system into str		*/
/****************************************************************************/
char* DLLCALL os_version(char *str)
{
#if defined(__OS2__) && defined(__BORLANDC__)

	sprintf(str,"OS/2 %u.%u (%u.%u)",_osmajor/10,_osminor/10,_osmajor,_osminor);

#elif defined(_WIN32)

	/* Windows Version */
	char*			winflavor="";
	OSVERSIONINFO	winver;

	winver.dwOSVersionInfoSize=sizeof(winver);
	GetVersionEx(&winver);

	switch(winver.dwPlatformId) {
		case VER_PLATFORM_WIN32_NT:
			winflavor="NT ";
			break;
		case VER_PLATFORM_WIN32s:
			winflavor="Win32s ";
			break;
		case VER_PLATFORM_WIN32_WINDOWS:
			winver.dwBuildNumber&=0xffff;
			break;
	}

386
	sprintf(str,"Windows %sVersion %u.%u (Build %u) %s"
387
388
389
390
391
392
393
394
			,winflavor
			,winver.dwMajorVersion, winver.dwMinorVersion
			,winver.dwBuildNumber,winver.szCSDVersion);

#elif defined(__unix__)

	struct utsname unixver;

395
	if(uname(&unixver)<0)
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
		sprintf(str,"Unix (uname errno: %d)",errno);
	else
		sprintf(str,"%s %s %s"
			,unixver.sysname	/* e.g. "Linux" */
			,unixver.release	/* e.g. "2.2.14-5.0" */
			,unixver.machine	/* e.g. "i586" */
			);

#else	/* DOS */

	sprintf(str,"DOS %u.%02u",_osmajor,_osminor);

#endif

	return(str);
}
412

413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
char* DLLCALL os_cmdshell(void)
{
	char*	shell=getenv(OS_CMD_SHELL_ENV_VAR);

#if !defined(__unix__)
	if(shell==NULL)
#ifdef _PATH_BSHELL
		shell=_PATH_BSHELL;
#else
		shell="/bin/sh";
#endif
#endif

	return(shell);
}

429
430
431
432
433
434
435
436
#if !defined(__unix__)

/****************************************************************************/
/* Win32 implementations of the recursive (thread-safe) versions of std C	*/
/* time functions (gmtime, localtime, ctime, and asctime) used in Unix.		*/
/* The native Win32 versions of these functions are already thread-safe.	*/
/****************************************************************************/

437
struct tm* DLLCALL gmtime_r(const time_t* t, struct tm* tm)
438
439
440
441
442
443
444
445
446
447
{
	struct tm* tmp = gmtime(t);

	if(tmp==NULL)
		return(NULL);

	*tm = *tmp;
	return(tm);
}

448
struct tm* DLLCALL localtime_r(const time_t* t, struct tm* tm)
449
450
451
452
453
454
455
456
457
458
{
	struct tm* tmp = localtime(t);

	if(tmp==NULL)
		return(NULL);

	*tm = *tmp;
	return(tm);
}

459
char* DLLCALL ctime_r(const time_t *t, char *buf)
460
461
462
463
464
465
{
	char* p = ctime(t);

	if(p==NULL)
		return(NULL);

466
	strcpy(buf,p);
467
468
469
	return(buf);
}

470
char* DLLCALL asctime_r(const struct tm *tm, char *buf)
471
472
473
474
475
476
{
	char* p = asctime(tm);

	if(p==NULL)
		return(NULL);

477
	strcpy(buf,p);
478
479
480
481
	return(buf);
}

#endif	/* !defined(__unix__) */
482

rswindell's avatar
rswindell committed
483
484
485
/****************************************************************/
/* Microsoft (DOS/Win32) real-time system clock implementation.	*/
/****************************************************************/
486
487
488
489
490
491
492
493
494
495
496
#ifdef __unix__
clock_t DLLCALL msclock(void)
{
	long long int usecs;
	struct timeval tv;
	if(gettimeofday(&tv,NULL)==1)
		return(-1);
	usecs=tv.tv_sec*1000000+tv.tv_usec;
	return((clock_t)(usecs/(1000000/MSCLOCKS_PER_SEC)));
}
#endif
497
498
499
500
501
502

/****************************************************************************/
/* Truncates all white-space chars off end of 'str'	(needed by STRERRROR)	*/
/****************************************************************************/
char* DLLCALL truncsp(char* str)
{
503
	size_t i,len;
504

505
	i=len=strlen(str);
506
507
	while(i && (str[i-1]==' ' || str[i-1]=='\t' || str[i-1]=='\r' || str[i-1]=='\n')) 
		i--;
508
509
	if(i!=len)
		str[i]=0;	/* truncate */
510
511
512
513

	return(str);
}

514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
/****************************************************************************/
/* Truncates all white-space chars off end of \n-terminated lines in 'str'	*/
/****************************************************************************/
char* DLLCALL truncsp_lines(char* dst)
{
	char* sp;
	char* dp;
	char* src;

	if((src=strdup(dst))==NULL)
		return(dst);

	for(sp=src, dp=dst; *sp!=0; sp++) {
		if(*sp=='\n')
			while(dp!=dst 
				&& (*(dp-1)==' ' || *(dp-1)=='\t' || *(dp-1)=='\r') && *(dp-1)!='\n') 
					dp--;
		*(dp++)=*sp;
	}
	*dp=0;

	free(src);
	return(dst);
}

539
540
541
542
543
/****************************************************************************/
/* Truncates carriage-return and line-feed chars off end of 'str'			*/
/****************************************************************************/
char* DLLCALL truncnl(char* str)
{
544
	size_t i,len;
545

546
	i=len=strlen(str);
547
548
	while(i && (str[i-1]=='\r' || str[i-1]=='\n')) 
		i--;
549
550
	if(i!=len)
		str[i]=0;	/* truncate */
551
552
553

	return(str);
}
554
555
556
557
558
559
560
561

/****************************************************************************/
/* Return errno from the proper C Library implementation					*/
/* (single/multi-threaded)													*/
/****************************************************************************/
int DLLCALL	get_errno(void)
{
	return(errno);
562
}
563
564
565
566
567

/****************************************************************************/
/* Returns the current value of the systems best timer (in SECONDS)			*/
/* Any value < 0 indicates an error											*/
/****************************************************************************/
568
long double	DLLCALL	xp_timer(void)
569
{
570
	long double ret;
571
#if defined(__unix__)
572
573
574
575
576
577
	struct timeval tv;
	if(gettimeofday(&tv,NULL)==1)
		return(-1);
	ret=tv.tv_usec;
	ret /= 1000000;
	ret += tv.tv_sec;
578
#elif defined(_WIN32)
579
	LARGE_INTEGER	freq;
deuce's avatar
deuce committed
580
581
	LARGE_INTEGER	tick;
	if(QueryPerformanceFrequency(&freq) && QueryPerformanceCounter(&tick)) {
582
#if 0
583
584
		ret=((long double)tick.HighPart*4294967296)+((long double)tick.LowPart);
		ret /= ((long double)freq.HighPart*4294967296)+((long double)freq.LowPart);
585
#else
586
		/* In MSVC, a long double does NOT have 19 decimals of precision */
587
		ret=(((long double)(tick.QuadPart%freq.QuadPart))/freq.QuadPart);
588
		ret+=tick.QuadPart/freq.QuadPart;
589
#endif
590
591
592
593
594
595
	}
	else {
		ret=GetTickCount();
		ret /= 1000;
	}
#else
596
	ret=time(NULL);	/* Weak implementation */
597
598
599
#endif
	return(ret);
}