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-rw-r--r-- | js/src/zydis/Zycore/LibC.h | 511 |
1 files changed, 511 insertions, 0 deletions
diff --git a/js/src/zydis/Zycore/LibC.h b/js/src/zydis/Zycore/LibC.h new file mode 100644 index 0000000000..83d271583d --- /dev/null +++ b/js/src/zydis/Zycore/LibC.h @@ -0,0 +1,511 @@ +/*************************************************************************************************** + + 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. + +***************************************************************************************************/ + +/** + * @file + * Provides a simple LibC abstraction and fallback routines. + */ + +#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> + +/** + * Defines the `ZyanVAList` datatype. + */ +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 + +/** + * Defines the `ZyanFile` datatype. + */ +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_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 "zydis/Zycore/Defines.h" +#include "zydis/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) + +/** + * Defines the `ZyanVAList` datatype. + */ +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) + +/** + * Defines the `ZyanVAList` datatype. + */ +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 */ |