tron@2186: /* $Id$ */
tron@2186: 
tron@1317: #include "stdafx.h"
tron@1317: #include "string.h"
tron@1317: 
tron@2234: #include <stdarg.h>
Darkvater@4200: #include <ctype.h> // required for tolower()
tron@2234: 
tron@1317: void ttd_strlcat(char *dst, const char *src, size_t size)
tron@1317: {
tron@1317: 	assert(size > 0);
tron@1317: 	for (; size > 0 && *dst != '\0'; --size, ++dst) {}
tron@1317: 	assert(size > 0);
tron@1317: 	while (--size > 0 && *src != '\0') *dst++ = *src++;
tron@1317: 	*dst = '\0';
tron@1317: }
tron@1317: 
tron@1317: 
tron@1317: void ttd_strlcpy(char *dst, const char *src, size_t size)
tron@1317: {
tron@1317: 	assert(size > 0);
tron@1317: 	while (--size > 0 && *src != '\0') *dst++ = *src++;
tron@1317: 	*dst = '\0';
tron@1317: }
tron@1317: 
tron@1317: 
tron@1317: char* strecat(char* dst, const char* src, const char* last)
tron@1317: {
tron@1317: 	assert(last == NULL || dst <= last);
tron@1317: 	for (; *dst != '\0'; ++dst)
tron@1317: 		if (dst == last) return dst;
tron@1317: 	for (; *src != '\0' && dst != last; ++dst, ++src) *dst = *src;
tron@1317: 	*dst = '\0';
tron@1317: 	return strecpy(dst, src, last);
tron@1317: }
tron@1317: 
tron@1317: 
tron@1317: char* strecpy(char* dst, const char* src, const char* last)
tron@1317: {
tron@1317: 	assert(last == NULL || dst <= last);
tron@1317: 	for (; *src != '\0' && dst != last; ++dst, ++src) *dst = *src;
tron@1317: 	*dst = '\0';
tron@1317: 	return dst;
tron@1317: }
tron@2234: 
tron@2234: 
tron@2234: char* CDECL str_fmt(const char* str, ...)
tron@2234: {
tron@2234: 	char buf[4096];
tron@2234: 	va_list va;
tron@2234: 	int len;
tron@2234: 	char* p;
tron@2234: 
tron@2234: 	va_start(va, str);
truelight@4370: 	len = vsnprintf(buf, lengthof(buf), str, va);
tron@2234: 	va_end(va);
tron@2234: 	p = malloc(len + 1);
tron@2234: 	if (p != NULL) memcpy(p, buf, len + 1);
tron@2234: 	return p;
tron@2234: }
Darkvater@2775: 
Darkvater@2775: void str_validate(char *str)
Darkvater@2775: {
Darkvater@2775: 	for (; *str != '\0'; str++)
truelight@4299: 		if (!IsValidAsciiChar(*str, CS_ALPHANUMERAL)) *str = '?';
Darkvater@2775: }
Darkvater@4200: 
truelight@4300: /**
truelight@4300:  * Only allow certain keys. You can define the filter to be used. This makes
truelight@4300:  *  sure no invalid keys can get into an editbox, like BELL.
truelight@4299:  * @param key character to be checked
truelight@4300:  * @param afilter the filter to use
truelight@4300:  * @return true or false depending if the character is printable/valid or not
truelight@4300:  */
truelight@4299: bool IsValidAsciiChar(byte key, CharSetFilter afilter)
truelight@4299: {
truelight@4299: 	bool firsttest = false;
truelight@4299: 
truelight@4299: 	switch (afilter) {
truelight@4299: 		case CS_ALPHANUMERAL:
truelight@4299: 			firsttest = (key >= ' ' && key < 127);
truelight@4299: 			break;
truelight@4299: 
truelight@4300: 		/* We are very strict here */
truelight@4300: 		case CS_NUMERAL:
truelight@4300: 			return (key >= '0' && key <= '9');
truelight@4299: 
truelight@4299: 		case CS_ALPHA:
truelight@4299: 		default:
truelight@4299: 			firsttest = ((key >= 'A' && key <= 'Z') || (key >= 'a' && key <= 'z'));
truelight@4299: 			break;
truelight@4299: 	}
truelight@4299: 
truelight@4300: 	/* Allow some special chars too that are non-ASCII but still valid (like '^' above 'a') */
truelight@4299: 	return (firsttest || (key >= 160 &&
truelight@4299: 		key != 0xAA && key != 0xAC && key != 0xAD && key != 0xAF &&
truelight@4299: 		key != 0xB5 && key != 0xB6 && key != 0xB7 && key != 0xB9));
truelight@4299: }
truelight@4300: 
truelight@4300: void strtolower(char *str)
truelight@4300: {
truelight@4300: 	for (; *str != '\0'; str++) *str = tolower(*str);
truelight@4300: }
truelight@4370: 
truelight@4370: #ifdef WIN32
truelight@4370: int CDECL snprintf(char *str, size_t size, const char *format, ...)
truelight@4370: {
truelight@4370: 	va_list ap;
truelight@4370: 	int ret;
truelight@4370: 
truelight@4370: 	va_start(ap, format);
truelight@4370: 	ret = vsnprintf(str, size, format, ap);
truelight@4370: 	va_end(ap);
truelight@4370: 	return ret;
truelight@4370: }
truelight@4370: 
truelight@4370: #ifdef _MSC_VER
truelight@4370: int CDECL vsnprintf(char *str, size_t size, const char *format, va_list ap)
truelight@4370: {
truelight@4370: 	int ret;
truelight@4370: 	ret = _vsnprintf(str, size, format, ap);
truelight@4370: 	if (ret < 0) str[size - 1] = '\0';
truelight@4370: 	return ret;
truelight@4370: }
truelight@4370: #endif /* _MSC_VER */
truelight@4370: 
truelight@4370: #endif /* WIN32 */