str_util.c 12 KB
Newer Older
1
/* str_util.c */
2

3
/* Synchronet string utility routines */
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

/* $Id$ */

/****************************************************************************
 * @format.tab-size 4		(Plain Text/Source Code File Header)			*
 * @format.use-tabs true	(see http://www.synchro.net/ptsc_hdr.html)		*
 *																			*
 * Copyright 2000 Rob Swindell - http://www.synchro.net/copyright.html		*
 *																			*
 * This program is free software; you can redistribute it and/or			*
 * modify it under the terms of the GNU General Public License				*
 * as published by the Free Software Foundation; either version 2			*
 * of the License, or (at your option) any later version.					*
 * See the GNU General Public License for more details: gpl.txt or			*
 * http://www.fsf.org/copyleft/gpl.html										*
 *																			*
 * 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 "sbbs.h"

/****************************************************************************/
41
/* Removes ctrl-a codes from the string 'instr'                             */
42
/****************************************************************************/
43
char* DLLCALL remove_ctrl_a(char *instr, char *outstr)
44
{
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
	char str[1024],*p;
	uint i,j;

	for(i=j=0;instr[i] && j<sizeof(str)-1;i++) {
		if(instr[i]==CTRL_A && instr[i+1]!=0)
			i++;
		else str[j++]=instr[i]; 
	}
	str[j]=0;
	if(outstr!=NULL)
		p=outstr;
	else
		p=instr;
	strcpy(p,str);
	return(p);
}

char* DLLCALL strip_ctrl(char *str)
{
	char tmp[1024];
	int i,j;

	for(i=j=0;str[i] && j<(int)sizeof(tmp)-1;i++)
		if(str[i]==CTRL_A && str[i+1]!=0)
			i++;
		else if((uchar)str[i]>=SP)
			tmp[j++]=str[i];
	tmp[j]=0;
	strcpy(str,tmp);
	return(str);
}

char* DLLCALL strip_exascii(char *str)
{
	char tmp[1024];
	int i,j;

	for(i=j=0;str[i] && j<(int)sizeof(tmp)-1;i++)
		if(!(str[i]&0x80))
			tmp[j++]=str[i];
	tmp[j]=0;
	strcpy(str,tmp);
	return(str);
88
}
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110

char* DLLCALL prep_file_desc(char *str)
{
	char tmp[1024];
	int i,j;

	for(i=j=0;str[i];i++)
		if(str[i]==CTRL_A && str[i+1]!=0)
			i++;
		else if(j && str[i]<=SP && tmp[j-1]==SP)
			continue;
		else if(i && !isalnum(str[i]) && str[i]==str[i-1])
			continue;
		else if((uchar)str[i]>=SP)
			tmp[j++]=str[i];
		else if(str[i]==TAB || (str[i]==CR && str[i+1]==LF))
			tmp[j++]=SP;
	tmp[j]=0;
	strcpy(str,tmp);
	return(str);
}

111
/****************************************************************************/
112
/* Pattern matching string search of 'insearchof' in 'fname'.				*/
113
/****************************************************************************/
114
BOOL DLLCALL findstr(char* insearchof, char* fname)
115
{
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
	char*	p;
	char	str[128];
	char	search[81];
	int		c;
	int		i;
	BOOL	found;
	FILE*	stream;

	if((stream=fopen(fname,"r"))==NULL)
		return(FALSE); 

	SAFECOPY(search,insearchof);
	strupr(search);

	found=FALSE;

	while(!feof(stream) && !ferror(stream) && !found) {
		if(!fgets(str,sizeof(str),stream))
			break;
		
		found=FALSE;

		p=str;	
		while(*p && *p<=' ') p++; /* Skip white-space */

		if(*p==';')		/* comment */
			continue;

		if(*p=='!')	{	/* !match */
			found=TRUE;
			p++;
		}

		truncsp(p);
		c=strlen(p);
		if(c) {
			c--;
			strupr(p);
			if(p[c]=='~') {
				p[c]=0;
				if(strstr(search,p))
					found=!found; 
			}

			else if(p[c]=='^' || p[c]=='*') {
				p[c]=0;
				if(!strncmp(p,search,c))
					found=!found; 
			}

			else if(p[0]=='*') {
				i=strlen(search);
				if(i<c)
					continue;
				if(!strncmp(p+1,search+(i-c),c))
					found=!found; 
			}

			else if(!strcmp(p,search))
				found=!found; 
		} 
177
	}
178
179
180
181
182
183
184
185
186
187
188
189
190
	fclose(stream);
	return(found);
}

/****************************************************************************/
/* Searches the file <name>.can in the TEXT directory for matches			*/
/* Returns TRUE if found in list, FALSE if not.								*/
/****************************************************************************/
BOOL DLLCALL trashcan(scfg_t* cfg, char* insearchof, char* name)
{
	char fname[MAX_PATH+1];

	sprintf(fname,"%s%s.can",cfg->text_dir,name);
191
	return(findstr(insearchof,fname));
192
}
193
194
195
196
197
198
199
200
201
202

/****************************************************************************/
/* Returns the number of characters in 'str' not counting ctrl-ax codes		*/
/* or the null terminator													*/
/****************************************************************************/
int bstrlen(char *str)
{
	int i=0;

	while(*str) {
rswindell's avatar
rswindell committed
203
		if(*str==CTRL_A)
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
			str++;
		else
			i++;
		if(!(*str)) break;
		str++; }
	return(i);
}

/****************************************************************************/
/* Returns in 'string' a character representation of the number in l with   */
/* commas.																	*/
/****************************************************************************/
char *ultoac(ulong l, char *string)
{
	char str[256];
219
	int i,j,k;
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234

	ultoa(l,str,10);
	i=strlen(str)-1;
	j=i/3+1+i;
	string[j--]=0;
	for(k=1;i>-1;k++) {
		string[j--]=str[i--];
		if(j>0 && !(k%3))
			string[j--]=','; }
	return(string);
}

/****************************************************************************/
/* Truncates white-space chars off end of 'str'								*/
/****************************************************************************/
rswindell's avatar
rswindell committed
235
void DLLCALL truncsp(char *str)
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
{
	uint c;

	c=strlen(str);
	while(c && (uchar)str[c-1]<=SP) c--;
	str[c]=0;
}

/****************************************************************************/
/* Puts a backslash on path strings 										*/
/****************************************************************************/
void backslash(char *str)
{
    int i;

	i=strlen(str);
	if(i && str[i-1]!='\\' && str[i-1]!='/') {
rswindell's avatar
rswindell committed
253
254
255
		str[i]=BACKSLASH; 
		str[i+1]=0; 
	}
256
257
258
259
260
261
262
263
264
265
266
}

/****************************************************************************/
/* Puts a backslash on path strings if not just a drive letter and colon	*/
/****************************************************************************/
void backslashcolon(char *str)
{
    int i;

	i=strlen(str);
	if(i && str[i-1]!='\\' && str[i-1]!='/' && str[i-1]!=':') {
rswindell's avatar
rswindell committed
267
268
269
		str[i]=BACKSLASH; 
		str[i+1]=0; 
	}
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
}

/****************************************************************************/
/* Compares pointers to pointers to char. Used in conjuction with qsort()   */
/****************************************************************************/
int pstrcmp(char **str1, char **str2)
{
	return(strcmp(*str1,*str2));
}

/****************************************************************************/
/* Returns the number of characters that are the same between str1 and str2 */
/****************************************************************************/
int strsame(char *str1, char *str2)
{
	int i,j=0;

	for(i=0;str1[i];i++)
		if(str1[i]==str2[i]) j++;
	return(j);
}

/****************************************************************************/
/* Returns an ASCII string for FidoNet address 'addr'                       */
/****************************************************************************/
295
char *faddrtoa(faddr_t* addr, char* outstr)
296
{
297
	static char str[64];
298
299
    char point[25];

300
301
	if(addr==NULL)
		return("0:0/0");
302
	sprintf(str,"%hu:%hu/%hu",addr->zone,addr->net,addr->node);
303
	if(addr->point) {
304
		sprintf(point,".%hu",addr->point);
305
		strcat(str,point); }
306
307
308
309
	if(outstr==NULL)
		return(str);
	strcpy(outstr,str);
	return(outstr);
310
311
}

rswindell's avatar
rswindell committed
312
char* DLLCALL net_addr(net_t* net)
313
314
{
	if(net->type==NET_FIDO)
315
		return(faddrtoa((faddr_t*)net->addr,NULL));
316
317
318
	return(net->addr);
}

319
320
321
322
323
324
325
326
327
328
329
330
/****************************************************************************/
/* Returns string for 2 digit hex+ numbers up to 575						*/
/****************************************************************************/
char *hexplus(uint num, char *str)
{
	sprintf(str,"%03x",num);
	str[0]=num/0x100 ? 'f'+(num/0x10)-0xf : str[1];
	str[1]=str[2];
	str[2]=0;
	return(str);
}

331
332
333
334
335
336
337
338
339
340
341
342
343
/****************************************************************************/
/* Converts an ASCII Hex string into an ulong                               */
/* by Steve Deppe (Ille Homine Albe)										*/
/****************************************************************************/
ulong ahtoul(char *str)
{
    ulong l,val=0;

	while((l=(*str++)|0x20)!=0x20)
		val=(l&0xf)+(l>>6&1)*9+val*16;
	return(val);
}

344
345
346
/****************************************************************************/
/* Converts hex-plus string to integer										*/
/****************************************************************************/
347
348
349
350
351
352
353
354
355
356
357
358
359
uint hptoi(char *str)
{
	char tmp[128];
	uint i;

	if(!str[1] || toupper(str[0])<='F')
		return(ahtoul(str));
	strcpy(tmp,str);
	tmp[0]='F';
	i=ahtoul(tmp)+((toupper(str[0])-'F')*0x10);
	return(i);
}

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
386
387
388
389
390
391
392
/****************************************************************************/
/* Updates 16-bit "rcrc" with character 'ch'                                */
/****************************************************************************/
void ucrc16(uchar ch, ushort *rcrc) 
{
	ushort i, cy;
    uchar nch=ch;
 
	for (i=0; i<8; i++) {
		cy=*rcrc & 0x8000;
		*rcrc<<=1;
		if (nch & 0x80) *rcrc |= 1;
		nch<<=1;
		if (cy) *rcrc ^= 0x1021; }
}

/****************************************************************************/
/* Returns CRC-16 of ASCIIZ string (not including terminating NULL)			*/
/****************************************************************************/
ushort DLLCALL crc16(char *str)
{
	int 	i=0;
	ushort	crc=0;

	ucrc16(0,&crc);
	while(str[i])
		ucrc16(str[i++],&crc);
	ucrc16(0,&crc);
	ucrc16(0,&crc);
	return(crc);
}

393
394
395
/****************************************************************************/
/* Returns 1 if a is a valid ctrl-a code, 0 if it isn't.                    */
/****************************************************************************/
396
BOOL DLLCALL validattr(char a)
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
{

	switch(toupper(a)) {
		case '-':   /* clear        */
		case '_':   /* clear        */
		case 'B':   /* blue     fg  */
		case 'C':   /* cyan     fg  */
		case 'G':   /* green    fg  */
		case 'H':   /* high     fg  */
		case 'I':   /* blink        */
		case 'K':   /* black    fg  */
		case 'L':   /* cls          */
		case 'M':   /* magenta  fg  */
		case 'N':   /* normal       */
		case 'P':   /* pause        */
		case 'R':   /* red      fg  */
		case 'W':   /* white    fg  */
		case 'Y':   /* yellow   fg  */
		case '0':   /* black    bg  */
		case '1':   /* red      bg  */
		case '2':   /* green    bg  */
		case '3':   /* brown    bg  */
		case '4':   /* blue     bg  */
		case '5':   /* magenta  bg  */
		case '6':   /* cyan     bg  */
		case '7':   /* white    bg  */
			return(TRUE); 
	}
	return(FALSE);
}

/****************************************************************************/
/* Strips invalid Ctrl-Ax sequences from str                                */
/* Returns number of ^A's in line                                           */
/****************************************************************************/
432
size_t DLLCALL strip_invalid_attr(char *strin)
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
{
    char str[1024];
    size_t a,c,d;

	for(a=c=d=0;strin[c] && d<sizeof(str)-1;c++) {
		if(strin[c]==CTRL_A && strin[c+1]!=0) {
			a++;
			if(!validattr(strin[c+1])) {
				c++;
				continue; 
			} 
		}
		str[d++]=strin[c]; 
	}
	str[d]=0;
	strcpy(strin,str);
	return(a);
}
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465

ushort DLLCALL subject_crc(char *subj)
{
	char str[512];

	while(!strnicmp(subj,"RE:",3)) {
		subj+=3;
		while(*subj==SP)
			subj++; 
	}

	SAFECOPY(str,subj);
	strlwr(str);
	return(crc16(str));
}