genwrap.c 13.8 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 2005 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

rswindell's avatar
rswindell committed
234
235
236
237
238
/****************************************************************************/
/* Initialize (seed) the random number generator							*/
/****************************************************************************/
unsigned DLLCALL xp_randomize(void)
{
rswindell's avatar
rswindell committed
239
	unsigned seed=~0;
rswindell's avatar
rswindell committed
240
241
242
243
244
245
246
247

#if defined(HAS_DEV_RANDOM) && defined(RANDOM_DEV)
	int     rf;

	if((rf=open(RANDOM_DEV, O_RDONLY))!=-1) {
		read(rf, &seed, sizeof(seed));
		close(rf);
	}
rswindell's avatar
rswindell committed
248
249
250
251
252
253
254
255
256
257
#else
	unsigned curtime	= (unsigned)time(NULL);
	unsigned process_id = (unsigned)GetCurrentProcessId();

	seed = curtime ^ BYTE_SWAP_INT(process_id);

	#if defined(_WIN32) || defined(GetCurrentThreadId)
		seed ^= (unsigned)GetCurrentThreadId();
	#endif

rswindell's avatar
rswindell committed
258
259
260
261
262
263
#endif

 	srand(seed);
	return(seed);
}

264
265
266
267
268
269
270
271
272
273
274
275
276
277
/****************************************************************************/
/* Return random number between 0 and n-1									*/
/****************************************************************************/
int DLLCALL xp_random(int n)
{
	float f;

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

	return((int)(n*f));
}

278
279
280
281
/****************************************************************************/
/* Return ASCII string representation of ulong								*/
/* There may be a native GNU C Library function to this...					*/
/****************************************************************************/
rswindell's avatar
rswindell committed
282
#if !defined(_MSC_VER) && !defined(__BORLANDC__) && !defined(__WATCOMC__)
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
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

303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
/****************************************************************************/
/* 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;
	}

333
	sprintf(str,"Windows %sVersion %u.%u (Build %u) %s"
334
335
336
337
338
339
340
341
			,winflavor
			,winver.dwMajorVersion, winver.dwMinorVersion
			,winver.dwBuildNumber,winver.szCSDVersion);

#elif defined(__unix__)

	struct utsname unixver;

342
	if(uname(&unixver)<0)
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
		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);
}
359
360
361
362
363
364
365
366
367

#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.	*/
/****************************************************************************/

368
struct tm* DLLCALL gmtime_r(const time_t* t, struct tm* tm)
369
370
371
372
373
374
375
376
377
378
{
	struct tm* tmp = gmtime(t);

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

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

379
struct tm* DLLCALL localtime_r(const time_t* t, struct tm* tm)
380
381
382
383
384
385
386
387
388
389
{
	struct tm* tmp = localtime(t);

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

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

390
char* DLLCALL ctime_r(const time_t *t, char *buf)
391
392
393
394
395
396
{
	char* p = ctime(t);

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

397
	strcpy(buf,p);
398
399
400
	return(buf);
}

401
char* DLLCALL asctime_r(const struct tm *tm, char *buf)
402
403
404
405
406
407
{
	char* p = asctime(tm);

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

408
	strcpy(buf,p);
409
410
411
412
	return(buf);
}

#endif	/* !defined(__unix__) */
413

rswindell's avatar
rswindell committed
414
415
416
/****************************************************************/
/* Microsoft (DOS/Win32) real-time system clock implementation.	*/
/****************************************************************/
417
418
419
420
421
422
423
424
425
426
427
#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
428
429
430
431
432
433

/****************************************************************************/
/* Truncates all white-space chars off end of 'str'	(needed by STRERRROR)	*/
/****************************************************************************/
char* DLLCALL truncsp(char* str)
{
434
	size_t i,len;
435

436
	i=len=strlen(str);
437
438
	while(i && (str[i-1]==' ' || str[i-1]=='\t' || str[i-1]=='\r' || str[i-1]=='\n')) 
		i--;
439
440
	if(i!=len)
		str[i]=0;	/* truncate */
441
442
443
444

	return(str);
}

445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
/****************************************************************************/
/* 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);
}

470
471
472
473
474
/****************************************************************************/
/* Truncates carriage-return and line-feed chars off end of 'str'			*/
/****************************************************************************/
char* DLLCALL truncnl(char* str)
{
475
	size_t i,len;
476

477
	i=len=strlen(str);
478
479
	while(i && (str[i-1]=='\r' || str[i-1]=='\n')) 
		i--;
480
481
	if(i!=len)
		str[i]=0;	/* truncate */
482
483
484

	return(str);
}
485
486
487
488
489
490
491
492

/****************************************************************************/
/* Return errno from the proper C Library implementation					*/
/* (single/multi-threaded)													*/
/****************************************************************************/
int DLLCALL	get_errno(void)
{
	return(errno);
493
}
494
495
496
497
498

/****************************************************************************/
/* Returns the current value of the systems best timer (in SECONDS)			*/
/* Any value < 0 indicates an error											*/
/****************************************************************************/
499
long double	DLLCALL	xp_timer(void)
500
{
501
	long double ret;
502
#if defined(__unix__)
503
504
505
506
507
508
	struct timeval tv;
	if(gettimeofday(&tv,NULL)==1)
		return(-1);
	ret=tv.tv_usec;
	ret /= 1000000;
	ret += tv.tv_sec;
509
#elif defined(_WIN32)
510
	LARGE_INTEGER	freq;
deuce's avatar
deuce committed
511
512
	LARGE_INTEGER	tick;
	if(QueryPerformanceFrequency(&freq) && QueryPerformanceCounter(&tick)) {
513
#if 0
514
515
		ret=((long double)tick.HighPart*4294967296)+((long double)tick.LowPart);
		ret /= ((long double)freq.HighPart*4294967296)+((long double)freq.LowPart);
516
#else
517
		/* In MSVC, a long double does NOT have 19 decimals of precision */
518
		ret=(((long double)(tick.QuadPart%freq.QuadPart))/freq.QuadPart);
519
		ret+=tick.QuadPart/freq.QuadPart;
520
#endif
521
522
523
524
525
526
	}
	else {
		ret=GetTickCount();
		ret /= 1000;
	}
#else
527
	ret=time(NULL);	/* Weak implementation */
528
529
530
#endif
	return(ret);
}