Mercurial > hg > ucx / file revision

 /*

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

  *

  * Copyright 2013 Olaf Wintermann. All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions are met:

  *

  *   1. Redistributions of source code must retain the above copyright

  *      notice, this list of conditions and the following disclaimer.

  *

  *   2. Redistributions in binary form must reproduce the above copyright

  *      notice, this list of conditions and the following disclaimer in the

  *      documentation and/or other materials provided with the distribution.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE

  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

  * POSSIBILITY OF SUCH DAMAGE.

  */

 #include "utils.h"

 #include <math.h>

 #include <stdio.h>

 #include <limits.h>

 #include <errno.h>

 /* COPY FUCNTIONS */

 void* ucx_strcpy(void* s, void* data) {

     char *str = (char*) s;

     size_t n = 1+strlen(str);

     char *cpy = (char*) malloc(n);

     memcpy(cpy, str, n);

     return cpy;

 }

 void* ucx_memcpy(void* m, void* n) {

     size_t k = *((size_t*)n);

     void *cpy = malloc(k);

     memcpy(cpy, m, k);

     return cpy;

 }

 size_t ucx_stream_copy(void *src, void *dest, read_func readfnc,

         write_func writefnc, char* buf, size_t bufsize, size_t n) {

     if(n == 0 || bufsize == 0) {

         return 0;

     }

     size_t ncp = 0;

     if (!buf) {

         buf = (char*)malloc(bufsize);

         if(buf == NULL) {

             return 0;

         }

     }

     size_t r;

     size_t rn = bufsize > n ? n : bufsize;

     while((r = readfnc(buf, 1, rn, src)) != 0) {

         r = writefnc(buf, 1, r, dest);

         ncp += r;

         n -= r;

         rn = bufsize > n ? n : bufsize;

         if(r == 0 || n == 0) {

             break;

         }

     }

     free(buf);

     return ncp;

 }

 /* COMPARE FUNCTIONS */

 int ucx_strcmp(void *s1, void *s2, void *data) {

     return strcmp((char*)s1, (char*)s2);

 }

 int ucx_strncmp(void *s1, void *s2, void *n) {

     return strncmp((char*)s1, (char*)s2, *((size_t*) n));

 }

 int ucx_intcmp(void *i1, void *i2, void *data) {

    int a = *((int*) i1);

    int b = *((int*) i2);

    if (a == b) {

        return 0;

    } else {

        return a < b ? -1 : 1;

    }

 }

 int ucx_floatcmp(void *f1, void *f2, void *epsilon) {

    float a = *((float*) f1);

    float b = *((float*) f2);

    float e = !epsilon ? 1e-6f : *((float*)epsilon);

    if (fabsf(a - b) < e) {

        return 0;

    } else {

        return a < b ? -1 : 1;

    }

 }

 int ucx_doublecmp(void *d1, void *d2, void *epsilon) {

    double a = *((float*) d1);

    double b = *((float*) d2);

    double e = !epsilon ? 1e-14 : *((double*)epsilon);

    if (fabs(a - b) < e) {

        return 0;

    } else {

        return a < b ? -1 : 1;

    }

 }

 int ucx_ptrcmp(void *ptr1, void *ptr2, void *data) {

     if (ptr1 == ptr2) {

         return 0;

     } else {

         return ptr1 < ptr2 ? -1 : 1;

     }

 }

 int ucx_memcmp(void *ptr1, void *ptr2, void *n) {

     return memcmp(ptr1, ptr2, *((size_t*)n));

 }

 /* PRINTF FUNCTIONS */

 #define UCX_PRINTF_BUFSIZE 256

 int ucx_fprintf(void *stream, write_func wfc, const char *fmt, ...) {

     va_list ap;

     int ret;

     va_start(ap, fmt);

     ret = ucx_vfprintf(stream, wfc, fmt, ap);

     va_end(ap);

     return ret;

 }

 int ucx_vfprintf(void *stream, write_func wfc, const char *fmt, va_list ap) {

     char buf[UCX_PRINTF_BUFSIZE];

     int ret = vsnprintf(buf, UCX_PRINTF_BUFSIZE, fmt, ap);

     if (ret < 0) {

         return ret;

     } else if (ret < UCX_PRINTF_BUFSIZE) {

         return (int)wfc(buf, 1, ret, stream);

     } else {

         if (ret == INT_MAX) {

             errno = ENOMEM;

             return -1;

         }

         int len = ret + 1;

         char *newbuf = (char*)malloc(len);

         if (!newbuf) {

             return -1;

         }

         ret = vsnprintf(newbuf, len, fmt, ap);

         if (ret > 0) {

             ret = (int)wfc(newbuf, 1, ret, stream);

         }

         free(newbuf);

     }

     return ret;

 }

 sstr_t ucx_asprintf(UcxAllocator *allocator, const char *fmt, ...) {

     va_list ap;

     sstr_t ret;

     va_start(ap, fmt);

     ret = ucx_vasprintf(allocator, fmt, ap);

     va_end(ap);

     return ret;

 }

 sstr_t ucx_vasprintf(UcxAllocator *a, const char *fmt, va_list ap) {

     sstr_t s;

     s.ptr = NULL;

     s.length = 0;

     char buf[UCX_PRINTF_BUFSIZE];

     int ret = vsnprintf(buf, UCX_PRINTF_BUFSIZE, fmt, ap);

     if (ret > 0 && ret < UCX_PRINTF_BUFSIZE) {

         s.ptr = (char*)a->malloc(a->pool, ret + 1);

         s.length = (size_t)ret;

         memcpy(s.ptr, buf, ret);

         s.ptr[s.length] = '\0';

     } else if (ret == INT_MAX) {

         errno = ENOMEM;

     } else  {

         int len = ret + 1;

         s.ptr = (char*)a->malloc(a->pool, len);

         ret = vsnprintf(s.ptr, len, fmt, ap);

         if (ret < 0) {

             free(s.ptr);

             s.ptr = NULL;

         } else {

             s.length = (size_t)ret;

         }

     }

     return s;

 }