genwrap.c 16.5 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 2012 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 */
45
#include <limits.h>		/* CHAR_BIT */
rswindell's avatar
rswindell committed
46

47
#if defined(__unix__)
48
	#include <sys/ioctl.h>		/* ioctl() */
49
	#include <sys/utsname.h>	/* uname() */
cyan's avatar
cyan committed
50
	#include <signal.h>
51
52
53
54
#elif defined(_WIN32)
	#include <Windows.h>
	#include <LM.h>		/* NetWkstaGetInfo() */
#endif
55
56

#include "genwrap.h"	/* Verify prototypes */
rswindell's avatar
rswindell committed
57
#include "xpendian.h"	/* BYTE_SWAP */
58

59
60
61
/****************************************************************************/
/* Used to replace snprintf()  guarantees to terminate.			  			*/
/****************************************************************************/
62
int DLLCALL safe_snprintf(char *dst, size_t size, const char *fmt, ...)
63
64
65
66
67
68
69
{
	va_list argptr;
	int     numchars;

	va_start(argptr,fmt);
	numchars= vsnprintf(dst,size,fmt,argptr);
	va_end(argptr);
70
71
72
	dst[size-1]=0;
#ifdef _MSC_VER
	if(numchars==-1)
73
		numchars=strlen(dst);
74
#endif
75
	if(numchars>=(int)size && numchars>0)
76
		numchars=size-1;
77
78
79
	return(numchars);
}

80
/****************************************************************************/
81
82
/* Return last character of string											*/
/****************************************************************************/
83
char* DLLCALL lastchar(const char* str)
84
85
86
87
88
89
{
	size_t	len;

	len = strlen(str);

	if(len)
90
		return((char*)&str[len-1]);
91

92
	return((char*)str);
93
94
95
}

/****************************************************************************/
96
97
/* Return character value of C-escaped (\) character						*/
/****************************************************************************/
98
char DLLCALL c_unescape_char(char ch)
99
100
{
	switch(ch) {
101
		case 'e':	return(ESC);	/* non-standard */
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
		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"			*/
/****************************************************************************/
118
char DLLCALL c_unescape_char_ptr(const char* str, char** endptr)
119
120
121
122
123
124
125
126
{
	char	ch;

	if(toupper(*str)=='X')
		ch=(char)strtol(++str,endptr,16);
	else if(isdigit(*str))
		ch=(char)strtol(++str,endptr,8);
	else {
127
		ch=c_unescape_char(*(str++));
128
129
130
131
132
133
134
135
136
137
		if(endptr!=NULL)
			*endptr=(char*)str;
	}

	return(ch);
}

/****************************************************************************/
/* Unescape a C string, in place											*/
/****************************************************************************/
138
char* DLLCALL c_unescape_str(char* str)
139
140
141
142
143
144
145
146
147
148
149
150
151
{
	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 */
152
			ch=c_unescape_char_ptr(src,&src);
153
154
155
156
157
158
159
		*(dst++)=ch;
	}
	*dst=0;
	free(buf);
	return(str);
}

160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
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;
183
184
	char*		d;
	const char*	e;
185

186
	for(s=src,d=dst;*s && (size_t)(d-dst)<maxlen;s++) {
187
		if((!ctrl_only || (uchar)*s < ' ') && (e=c_escape_char(*s))!=NULL) {
188
189
190
			strncpy(d,e,maxlen-(d-dst));
			d+=strlen(d);
		} else *d++=*s;
191
192
193
194
195
196
	}
	*d=0;

	return(dst);
}

197
/****************************************************************************/
198
199
/* Convert ASCIIZ string to upper case										*/
/****************************************************************************/
200
#if defined(__unix__)
201
char* DLLCALL strupr(char* str)
202
203
204
205
206
207
208
209
210
211
212
213
{
	char*	p=str;

	while(*p) {
		*p=toupper(*p);
		p++;
	}
	return(str);
}
/****************************************************************************/
/* Convert ASCIIZ string to lower case										*/
/****************************************************************************/
214
char* DLLCALL strlwr(char* str)
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
{
	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

238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
#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;

255
256
    if(!*str) {         /* no more tokens */
		*last = str;
257
        return NULL;
258
	}
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278

    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
279
280
281
/****************************************************************************/
/* Initialize (seed) the random number generator							*/
/****************************************************************************/
282
void DLLCALL xp_randomize(void)
rswindell's avatar
rswindell committed
283
{
284
#if !(defined(HAS_SRANDOMDEV_FUNC) && defined(HAS_RANDOM_FUNC))
rswindell's avatar
rswindell committed
285
	unsigned seed=~0;
286
#if defined(HAS_DEV_URANDOM) && defined(URANDOM_DEV)
287
288
	int		rf;
#endif
289
#endif
rswindell's avatar
rswindell committed
290

291
292
293
#if defined(HAS_SRANDOMDEV_FUNC) && defined(HAS_RANDOM_FUNC)
	srandomdev();
	return;
294
#else
295
296

#if defined(HAS_DEV_URANDOM) && defined(URANDOM_DEV)
297
	if((rf=open(URANDOM_DEV, O_RDONLY))!=-1) {
rswindell's avatar
rswindell committed
298
299
300
		read(rf, &seed, sizeof(seed));
		close(rf);
	}
301
302
303
304
	else {
#endif
		unsigned curtime	= (unsigned)time(NULL);
		unsigned process_id = (unsigned)GetCurrentProcessId();
rswindell's avatar
rswindell committed
305

306
		seed = curtime ^ BYTE_SWAP_INT(process_id);
rswindell's avatar
rswindell committed
307

308
309
310
		#if defined(_WIN32) || defined(GetCurrentThreadId)
			seed ^= (unsigned)GetCurrentThreadId();
		#endif
rswindell's avatar
rswindell committed
311

312
313
#if defined(HAS_DEV_URANDOM) && defined(URANDOM_DEV)
	}
rswindell's avatar
rswindell committed
314
315
#endif

316
317
318
#ifdef HAS_RANDOM_FUNC
 	srandom(seed);
#else
rswindell's avatar
rswindell committed
319
 	srand(seed);
320
#endif
321
#endif
rswindell's avatar
rswindell committed
322
323
}

324
325
326
/****************************************************************************/
/* Return random number between 0 and n-1									*/
/****************************************************************************/
327
long DLLCALL xp_random(int n)
328
{
329
#ifdef HAS_RANDOM_FUNC
330
331
	long			curr;
	unsigned long	limit;
332

333
334
	if(n<2)
		return(0);
335

336
	limit = ((1UL<<((sizeof(long)*CHAR_BIT)-1)) / n) * n - 1;
337

338
339
	while(1) {
		curr=random();
340
		if(curr <= limit)
341
342
			return(curr % n);
	}
343
#else
344
345
	double f=0;
	int ret;
346
347
348

	if(n<2)
		return(0);
349
	do {
350
		f=(double)rand()/(double)(RAND_MAX+1);
351
352
		ret=(int)(n*f);
	} while(ret==n);
353

354
	return(ret);
355
#endif
356
357
}

358
359
360
361
/****************************************************************************/
/* Return ASCII string representation of ulong								*/
/* There may be a native GNU C Library function to this...					*/
/****************************************************************************/
rswindell's avatar
rswindell committed
362
#if !defined(_MSC_VER) && !defined(__BORLANDC__) && !defined(__WATCOMC__)
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
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

383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
/****************************************************************************/
/* 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;
	}

413
414
415
416
417
418
419
420
421
422
423
	/* Work-around Microsoft Windows 8.1 stupidity where GetVersionEx() lies about the current OS version */
	if(winver.dwMajorVersion == 6 && winver.dwMinorVersion == 2) {
		WKSTA_INFO_100* wksta_info;
		if(NetWkstaGetInfo(NULL, 100, (LPBYTE*)&wksta_info) == NERR_Success) {
			winver.dwMajorVersion = wksta_info->wki100_ver_major;
			winver.dwMinorVersion = wksta_info->wki100_ver_minor;
			winver.dwBuildNumber = 0;
		}
	}

	sprintf(str,"Windows %sVersion %u.%u"
424
			,winflavor
425
426
427
428
429
			,winver.dwMajorVersion, winver.dwMinorVersion);
	if(winver.dwBuildNumber)
		sprintf(str+strlen(str), " (Build %u)", winver.dwBuildNumber);
	if(winver.szCSDVersion[0])
		sprintf(str+strlen(str), " %s", winver.szCSDVersion);
430
431
432
433
434

#elif defined(__unix__)

	struct utsname unixver;

435
	if(uname(&unixver)<0)
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
		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);
}
452

453
454
455
456
char* DLLCALL os_cmdshell(void)
{
	char*	shell=getenv(OS_CMD_SHELL_ENV_VAR);

deuce's avatar
deuce committed
457
#if defined(__unix__)
458
459
460
461
462
463
464
465
466
467
468
	if(shell==NULL)
#ifdef _PATH_BSHELL
		shell=_PATH_BSHELL;
#else
		shell="/bin/sh";
#endif
#endif

	return(shell);
}

rswindell's avatar
rswindell committed
469
470
471
/****************************************************************/
/* Microsoft (DOS/Win32) real-time system clock implementation.	*/
/****************************************************************/
472
473
474
475
476
477
478
#ifdef __unix__
clock_t DLLCALL msclock(void)
{
	long long int usecs;
	struct timeval tv;
	if(gettimeofday(&tv,NULL)==1)
		return(-1);
479
	usecs=((long long int)tv.tv_sec)*((long long int)1000000)+tv.tv_usec;
480
481
482
	return((clock_t)(usecs/(1000000/MSCLOCKS_PER_SEC)));
}
#endif
483

484
485
486
487
488
489
490
491
492
/****************************************************************************/
/* Skips all white-space chars at beginning of 'str'						*/
/****************************************************************************/
char* DLLCALL skipsp(char* str)
{
	SKIP_WHITESPACE(str);
	return(str);
}

493
494
495
496
497
/****************************************************************************/
/* Truncates all white-space chars off end of 'str'	(needed by STRERRROR)	*/
/****************************************************************************/
char* DLLCALL truncsp(char* str)
{
498
	size_t i,len;
499

500
501
	if(str!=NULL) {
		i=len=strlen(str);
502
		while(i && isspace((unsigned char)str[i-1]))
503
504
505
506
			i--;
		if(i!=len)
			str[i]=0;	/* truncate */
	}
507
508
509
	return(str);
}

510
/****************************************************************************/
511
512
/* Truncates common white-space chars off end of \n-terminated lines in		*/
/* 'dst' and retains original line break format	(e.g. \r\n or \n)			*/
513
514
515
516
517
518
519
520
521
522
523
/****************************************************************************/
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++) {
524
		if(*sp=='\n') {
525
			while(dp!=dst
526
				&& (*(dp-1)==' ' || *(dp-1)=='\t' || *(dp-1)=='\r'))
527
					dp--;
528
529
530
			if(sp!=src && *(sp-1)=='\r')
				*(dp++)='\r';
		}
531
532
533
534
535
536
537
538
		*(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
547
	if(str!=NULL) {
		i=len=strlen(str);
548
		while(i && (str[i-1]=='\r' || str[i-1]=='\n'))
549
550
551
552
			i--;
		if(i!=len)
			str[i]=0;	/* truncate */
	}
553
554
	return(str);
}
555
556
557
558
559
560
561
562

/****************************************************************************/
/* Return errno from the proper C Library implementation					*/
/* (single/multi-threaded)													*/
/****************************************************************************/
int DLLCALL	get_errno(void)
{
	return(errno);
563
}
564
565
566
567
568

/****************************************************************************/
/* Returns the current value of the systems best timer (in SECONDS)			*/
/* Any value < 0 indicates an error											*/
/****************************************************************************/
569
long double	DLLCALL	xp_timer(void)
570
{
571
	long double ret;
572
#if defined(__unix__)
573
574
575
576
577
578
	struct timeval tv;
	if(gettimeofday(&tv,NULL)==1)
		return(-1);
	ret=tv.tv_usec;
	ret /= 1000000;
	ret += tv.tv_sec;
579
#elif defined(_WIN32)
580
	LARGE_INTEGER	freq;
deuce's avatar
deuce committed
581
582
	LARGE_INTEGER	tick;
	if(QueryPerformanceFrequency(&freq) && QueryPerformanceCounter(&tick)) {
583
#if 0
584
585
		ret=((long double)tick.HighPart*4294967296)+((long double)tick.LowPart);
		ret /= ((long double)freq.HighPart*4294967296)+((long double)freq.LowPart);
586
#else
587
		/* In MSVC, a long double does NOT have 19 decimals of precision */
588
		ret=(((long double)(tick.QuadPart%freq.QuadPart))/freq.QuadPart);
589
		ret+=tick.QuadPart/freq.QuadPart;
590
#endif
591
592
593
594
595
596
	}
	else {
		ret=GetTickCount();
		ret /= 1000;
	}
#else
597
	ret=time(NULL);	/* Weak implementation */
598
599
600
#endif
	return(ret);
}
601
602
603
604
605
606
607
608
609
610
611
612

/* Returns TRUE if specified process is running */
BOOL DLLCALL check_pid(pid_t pid)
{
#if defined(__unix__)
	return(kill(pid,0)==0);
#elif defined(_WIN32)
	HANDLE	h;
	BOOL	result=FALSE;

	if((h=OpenProcess(PROCESS_QUERY_INFORMATION,/* inheritable: */FALSE, pid)) != NULL) {
		DWORD	code;
613
		if(GetExitCodeProcess(h,(PDWORD)&code)==TRUE && code==STILL_ACTIVE)
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
			result=TRUE;
		CloseHandle(h);
	}
	return result;
#else
	return FALSE;	/* Need check_pid() definition! */
#endif
}

/* Terminate (unconditionally) the specified process */
BOOL DLLCALL terminate_pid(pid_t pid)
{
#if defined(__unix__)
	return(kill(pid,SIGKILL)==0);
#elif defined(_WIN32)
	HANDLE	h;
	BOOL	result=FALSE;

	if((h=OpenProcess(PROCESS_TERMINATE,/* inheritable: */FALSE, pid)) != NULL) {
		if(TerminateProcess(h,255))
			result=TRUE;
		CloseHandle(h);
	}
	return result;
#else
	return FALSE;	/* Need check_pid() definition! */
#endif
}