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