常用快速流处理函数

#pragma oncetypedef union _EFFICA {struct {char v1;char v2;char v3;char v4;};int effica;} EFFICA, *PEFFICA;static size_t __cdecl fast_strlen(const char * str){register PEFFICA peffica;if (0 == str) {return 0;}peffica = (PEFFICA)str;for ( ;; ){if ((peffica->v2 && peffica->v4) && (peffica->v1 && peffica->v3)){++peffica;continue;}else{if (0 == peffica->v1)return ((size_t)peffica - (size_t)str);if (0 == peffica->v2)return ((size_t)peffica - (size_t)str + 1);if (0 == peffica->v3)return ((size_t)peffica - (size_t)str + 2);if (0 == peffica->v4)return ((size_t)peffica - (size_t)str + 3);break;}}return 0;}static size_t __cdecl fast_strcpy(char * des, const char * src, size_t len){register size_t dwordCount;register size_t i;if (0 == des || 0 == src) {return 0;}dwordCount = len / sizeof(size_t);i = 0;for (; i < dwordCount; ++i) {((size_t *)des)[i] = ((size_t *)src)[i];}i = i * sizeof(size_t);for (; i < len; ++i) {des[i] = src[i];}des[i] = 0;return (i);}static size_t __cdecl fast_strcmp(const char * des, const char * src, size_t len){register size_t dwordCount;register size_t i;if (0 == des || 0 == src) {return 0;}dwordCount = len / sizeof(size_t);i = 0;for (; i < dwordCount; ++i){if (((size_t *)des)[i] != ((size_t *)src)[i]) {return (i);}}i = i * sizeof(size_t);for (; i < len; ++i){if (des[i] != src[i]) {return (i);}}return (i);}static size_t __cdecl fast_strcat(char * des, const char * src, size_t len){register size_t dwordCount;register char * pdes;register size_t i;if (0 == des || 0 == src) {return 0;}dwordCount = len / sizeof(size_t);pdes = des + fast_strlen(des);i = 0;for (; i < dwordCount; ++i) {((size_t *)pdes)[i] = ((size_t *)src)[i];}i = i * sizeof(size_t);for (; i < len; ++i) {pdes[i] = src[i];}pdes[i] = 0;return (i);}static size_t __cdecl fast_strxch(char * des, char * src, size_t len){register size_t dwordCount;register size_t i;if (0 == des || 0 == src) {return 0;}dwordCount = len / sizeof(size_t);i = 0;for (; i < dwordCount; ++i){((size_t *)des)[i] = ((size_t *)des)[i] ^ ((size_t *)src)[i];((size_t *)src)[i] = ((size_t *)des)[i] ^ ((size_t *)src)[i];((size_t *)des)[i] = ((size_t *)des)[i] ^ ((size_t *)src)[i];}i = i * sizeof(size_t);for (; i < len; ++i){des[i] = des[i] ^ src[i];src[i] = des[i] ^ src[i];des[i] = des[i] ^ src[i];}return (i);}static int __cdecl fast_strstr(const char * des, const char * src, size_t len){int s;int cx,cy,cz;int sx,sy;register int i,sz;if (0 == des || 0 == src) {return (-1);}cx = (int)len / 2;cy = (int)len - cx;cz = (int)len - 1;i = cx;s = (int)fast_strlen(des);for (; i < s; ){if (des[i] == src[cx]){sx = i - 1;sz = cx - 1;for (; sz >= 0; ){if (des[sx] != src[sz]){i = i + (cx - sz);break;}--sx;--sz;}if (sz < 0){i = i + 1;sy = cx + 1;for (; (int)len > sy; ){if (des[i] != src[sy]){i = i + cy;break;}++i;++sy;}if (len == sy) {return (i - sy);}}continue;}if (src[cz] != des[(i + cy)]) {i = i + 2;}else {i = i + 1;}}return (-1);}static size_t fast_memset(void * d, int v, size_t l){register size_t dwordCount;register char * pval;register size_t i;if (0 == d) {return 0;}dwordCount = l / sizeof(size_t);pval = (char *)&v;i = 0;for (; i < dwordCount; ++i) {((size_t *)d)[i] = v;}i = i * sizeof(size_t);for (; i < l; ++i) {((char *)d)[i] = *pval++;}return (i);}static size_t __cdecl fast_memcpy(void * d, const void * s, size_t l){register size_t dwordCount;register size_t i;if (0 == d || 0 == s) {return 0;}dwordCount = l / sizeof(size_t);i = 0;for (; i < dwordCount; ++i) {((size_t *)d)[i] = ((size_t *)s)[i];}i = i * sizeof(size_t);for (; i < l; ++i) {((char *)d)[i] = ((char *)s)[i];}return (i);}static size_t __cdecl fast_memcmp(const void * d, const void * s, size_t l){register size_t dwordCount;register size_t i;if (0 == d || 0 == s) {return 0;}dwordCount = l / sizeof(size_t);i = 0;for (; i < dwordCount; ++i){if (((size_t *)d)[i] != ((size_t *)s)[i]) {return (i);}}i = i * sizeof(size_t);for (; i < l; ++i){if (((char *)d)[i] != ((char *)s)[i]) {return (i);}}return (i);}static size_t __cdecl fast_memxch(void * d, void * s, size_t l){register size_t dwordCount;register size_t i;if (0 == d || 0 == s) {return 0;}dwordCount = l / sizeof(size_t);i = 0;for (; i < dwordCount; ++i){((size_t *)d)[i] = ((size_t *)d)[i] ^ ((size_t *)s)[i];((size_t *)s)[i] = ((size_t *)d)[i] ^ ((size_t *)s)[i];((size_t *)d)[i] = ((size_t *)d)[i] ^ ((size_t *)s)[i];}i = i * sizeof(size_t);for (; i < l; ++i){((char *)d)[i] = ((char *)d)[i] ^ ((char *)s)[i];((char *)s)[i] = ((char *)d)[i] ^ ((char *)s)[i];((char *)d)[i] = ((char *)d)[i] ^ ((char *)s)[i];}return (i);}