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