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LibC.h
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/***************************************************************************************************
Zyan Core Library (Zycore-C)
Original Author : Florian Bernd, Joel Hoener
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
***************************************************************************************************/
#ifndef ZYCORE_LIBC_H
#define ZYCORE_LIBC_H
#ifndef ZYAN_CUSTOM_LIBC
// Include a custom LibC header and define `ZYAN_CUSTOM_LIBC` to provide your own LibC
// replacement functions
#ifndef ZYAN_NO_LIBC
/* ============================================================================================== */
/* LibC is available */
/* ============================================================================================== */
/* ---------------------------------------------------------------------------------------------- */
/* errno.h */
/* ---------------------------------------------------------------------------------------------- */
#include <errno.h>
#define ZYAN_ERRNO errno
/* ---------------------------------------------------------------------------------------------- */
/* stdarg.h */
/* ---------------------------------------------------------------------------------------------- */
#include <stdarg.h>
typedef va_list ZyanVAList;
#define ZYAN_VA_START va_start
#define ZYAN_VA_ARG va_arg
#define ZYAN_VA_END va_end
#define ZYAN_VA_COPY(dest, source) va_copy((dest), (source))
/* ---------------------------------------------------------------------------------------------- */
/* stdio.h */
/* ---------------------------------------------------------------------------------------------- */
#include <stdio.h>
#define ZYAN_FPUTS fputs
#define ZYAN_FPUTC fputc
#define ZYAN_FPRINTF fprintf
#define ZYAN_PRINTF printf
#define ZYAN_PUTC putc
#define ZYAN_PUTS puts
#define ZYAN_SCANF scanf
#define ZYAN_SSCANF sscanf
#define ZYAN_VSNPRINTF vsnprintf
typedef FILE ZyanFile;
#define ZYAN_STDIN stdin
#define ZYAN_STDOUT stdout
#define ZYAN_STDERR stderr
/* ---------------------------------------------------------------------------------------------- */
/* stdlib.h */
/* ---------------------------------------------------------------------------------------------- */
#include <stdlib.h>
#define ZYAN_CALLOC calloc
#define ZYAN_FREE free
#define ZYAN_GETENV getenv
#define ZYAN_MALLOC malloc
#define ZYAN_REALLOC realloc
/* ---------------------------------------------------------------------------------------------- */
/* string.h */
/* ---------------------------------------------------------------------------------------------- */
#include <string.h>
#define ZYAN_MEMCHR memchr
#define ZYAN_MEMCMP memcmp
#define ZYAN_MEMCPY memcpy
#define ZYAN_MEMMOVE memmove
#define ZYAN_MEMSET memset
#define ZYAN_STRCAT strcat
#define ZYAN_STRCHR strchr
#define ZYAN_STRCMP strcmp
#define ZYAN_STRCOLL strcoll
#define ZYAN_STRCPY strcpy
#define ZYAN_STRCSPN strcspn
#define ZYAN_STRLEN strlen
#define ZYAN_STRNCAT strncat
#define ZYAN_STRNCMP strncmp
#define ZYAN_STRNCPY strncpy
#define ZYAN_STRPBRK strpbrk
#define ZYAN_STRRCHR strrchr
#define ZYAN_STRSPN strspn
#define ZYAN_STRSTR strstr
#define ZYAN_STRTOK strtok
#define ZYAN_STRXFRM strxfrm
/* ---------------------------------------------------------------------------------------------- */
#else // if ZYAN_NO_LIBC
/* ============================================================================================== */
/* No LibC available, use our own functions */
/* ============================================================================================== */
#include <Zycore/Defines.h>
#include <Zycore/Types.h>
/*
* These implementations are by no means optimized and will be outperformed by pretty much any
* libc implementation out there. We do not aim towards providing competetive implementations here,
* but towards providing a last resort fallback for environments without a working libc.
*/
/* ---------------------------------------------------------------------------------------------- */
/* stdarg.h */
/* ---------------------------------------------------------------------------------------------- */
#if defined(ZYAN_MSVC) || defined(ZYAN_ICC)
typedef char* ZyanVAList;
# define ZYAN_VA_START __crt_va_start
# define ZYAN_VA_ARG __crt_va_arg
# define ZYAN_VA_END __crt_va_end
# define ZYAN_VA_COPY(destination, source) ((destination) = (source))
#elif defined(ZYAN_GNUC)
typedef __builtin_va_list ZyanVAList;
# define ZYAN_VA_START(v, l) __builtin_va_start(v, l)
# define ZYAN_VA_END(v) __builtin_va_end(v)
# define ZYAN_VA_ARG(v, l) __builtin_va_arg(v, l)
# define ZYAN_VA_COPY(d, s) __builtin_va_copy(d, s)
#else
# error "Unsupported compiler for no-libc mode."
#endif
/* ---------------------------------------------------------------------------------------------- */
/* stdio.h */
/* ---------------------------------------------------------------------------------------------- */
// ZYAN_INLINE int ZYAN_VSNPRINTF (char* const buffer, ZyanUSize const count,
// char const* const format, ZyanVAList args)
// {
// // We cant provide a fallback implementation for this function
// ZYAN_UNUSED(buffer);
// ZYAN_UNUSED(count);
// ZYAN_UNUSED(format);
// ZYAN_UNUSED(args);
// return ZYAN_NULL;
// }
/* ---------------------------------------------------------------------------------------------- */
/* stdlib.h */
/* ---------------------------------------------------------------------------------------------- */
// ZYAN_INLINE void* ZYAN_CALLOC(ZyanUSize nitems, ZyanUSize size)
// {
// // We cant provide a fallback implementation for this function
// ZYAN_UNUSED(nitems);
// ZYAN_UNUSED(size);
// return ZYAN_NULL;
// }
//
// ZYAN_INLINE void ZYAN_FREE(void *p)
// {
// // We cant provide a fallback implementation for this function
// ZYAN_UNUSED(p);
// }
//
// ZYAN_INLINE void* ZYAN_MALLOC(ZyanUSize n)
// {
// // We cant provide a fallback implementation for this function
// ZYAN_UNUSED(n);
// return ZYAN_NULL;
// }
//
// ZYAN_INLINE void* ZYAN_REALLOC(void* p, ZyanUSize n)
// {
// // We cant provide a fallback implementation for this function
// ZYAN_UNUSED(p);
// ZYAN_UNUSED(n);
// return ZYAN_NULL;
// }
/* ---------------------------------------------------------------------------------------------- */
/* string.h */
/* ---------------------------------------------------------------------------------------------- */
ZYAN_INLINE void* ZYAN_MEMCHR(const void* str, int c, ZyanUSize n)
{
const ZyanU8* p = (ZyanU8*)str;
while (n--)
{
if (*p != (ZyanU8)c)
{
p++;
} else
{
return (void*)p;
}
}
return 0;
}
ZYAN_INLINE int ZYAN_MEMCMP(const void* s1, const void* s2, ZyanUSize n)
{
const ZyanU8* p1 = s1, *p2 = s2;
while (n--)
{
if (*p1 != *p2)
{
return *p1 - *p2;
}
p1++, p2++;
}
return 0;
}
ZYAN_INLINE void* ZYAN_MEMCPY(void* dst, const void* src, ZyanUSize n)
{
volatile ZyanU8* dp = dst;
const ZyanU8* sp = src;
while (n--)
{
*dp++ = *sp++;
}
return dst;
}
ZYAN_INLINE void* ZYAN_MEMMOVE(void* dst, const void* src, ZyanUSize n)
{
volatile ZyanU8* pd = dst;
const ZyanU8* ps = src;
if (ps < pd)
{
for (pd += n, ps += n; n--;)
{
*--pd = *--ps;
}
} else
{
while (n--)
{
*pd++ = *ps++;
}
}
return dst;
}
ZYAN_INLINE void* ZYAN_MEMSET(void* dst, int val, ZyanUSize n)
{
volatile ZyanU8* p = dst;
while (n--)
{
*p++ = (unsigned char)val;
}
return dst;
}
ZYAN_INLINE char* ZYAN_STRCAT(char* dest, const char* src)
{
char* ret = dest;
while (*dest)
{
dest++;
}
while ((*dest++ = *src++));
return ret;
}
ZYAN_INLINE char* ZYAN_STRCHR(const char* s, int c)
{
while (*s != (char)c)
{
if (!*s++)
{
return 0;
}
}
return (char*)s;
}
ZYAN_INLINE int ZYAN_STRCMP(const char* s1, const char* s2)
{
while (*s1 && (*s1 == *s2))
{
s1++, s2++;
}
return *(const ZyanU8*)s1 - *(const ZyanU8*)s2;
}
ZYAN_INLINE int ZYAN_STRCOLL(const char *s1, const char *s2)
{
// TODO: Implement
ZYAN_UNUSED(s1);
ZYAN_UNUSED(s2);
return 0;
}
ZYAN_INLINE char* ZYAN_STRCPY(char* dest, const char* src)
{
char* ret = dest;
while ((*dest++ = *src++));
return ret;
}
ZYAN_INLINE ZyanUSize ZYAN_STRCSPN(const char *s1, const char *s2)
{
ZyanUSize ret = 0;
while (*s1)
{
if (ZYAN_STRCHR(s2, *s1))
{
return ret;
}
s1++, ret++;
}
return ret;
}
ZYAN_INLINE ZyanUSize ZYAN_STRLEN(const char* str)
{
const char* p = str;
while (*str)
{
++str;
}
return str - p;
}
ZYAN_INLINE char* ZYAN_STRNCAT(char* dest, const char* src, ZyanUSize n)
{
char* ret = dest;
while (*dest)
{
dest++;
}
while (n--)
{
if (!(*dest++ = *src++))
{
return ret;
}
}
*dest = 0;
return ret;
}
ZYAN_INLINE int ZYAN_STRNCMP(const char* s1, const char* s2, ZyanUSize n)
{
while (n--)
{
if (*s1++ != *s2++)
{
return *(unsigned char*)(s1 - 1) - *(unsigned char*)(s2 - 1);
}
}
return 0;
}
ZYAN_INLINE char* ZYAN_STRNCPY(char* dest, const char* src, ZyanUSize n)
{
char* ret = dest;
do
{
if (!n--)
{
return ret;
}
} while ((*dest++ = *src++));
while (n--)
{
*dest++ = 0;
}
return ret;
}
ZYAN_INLINE char* ZYAN_STRPBRK(const char* s1, const char* s2)
{
while (*s1)
{
if(ZYAN_STRCHR(s2, *s1++))
{
return (char*)--s1;
}
}
return 0;
}
ZYAN_INLINE char* ZYAN_STRRCHR(const char* s, int c)
{
char* ret = 0;
do
{
if (*s == (char)c)
{
ret = (char*)s;
}
} while (*s++);
return ret;
}
ZYAN_INLINE ZyanUSize ZYAN_STRSPN(const char* s1, const char* s2)
{
ZyanUSize ret = 0;
while (*s1 && ZYAN_STRCHR(s2, *s1++))
{
ret++;
}
return ret;
}
ZYAN_INLINE char* ZYAN_STRSTR(const char* s1, const char* s2)
{
const ZyanUSize n = ZYAN_STRLEN(s2);
while (*s1)
{
if (!ZYAN_MEMCMP(s1++, s2, n))
{
return (char*)(s1 - 1);
}
}
return 0;
}
ZYAN_INLINE char* ZYAN_STRTOK(char* str, const char* delim)
{
static char* p = 0;
if (str)
{
p = str;
} else
if (!p)
{
return 0;
}
str = p + ZYAN_STRSPN(p, delim);
p = str + ZYAN_STRCSPN(str, delim);
if (p == str)
{
return p = 0;
}
p = *p ? *p = 0, p + 1 : 0;
return str;
}
ZYAN_INLINE ZyanUSize ZYAN_STRXFRM(char* dest, const char* src, ZyanUSize n)
{
const ZyanUSize n2 = ZYAN_STRLEN(src);
if (n > n2)
{
ZYAN_STRCPY(dest, src);
}
return n2;
}
/* ---------------------------------------------------------------------------------------------- */
#endif
#endif
/* ============================================================================================== */
#endif /* ZYCORE_LIBC_H */
Defines.h
ZYAN_UNUSED
#define ZYAN_UNUSED(x)
Definition Defines.h:361
ZyanVAList
va_list ZyanVAList
Definition LibC.h:63
ZyanFile
FILE ZyanFile
Definition LibC.h:89
Types.h