/*
* Copyright (c) 2018 Calvin Rose
*
* 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 DST_STRBINSEARCH_H_defined
#define DST_STRBINSEARCH_H_defined

/* Do a binary search on a static array of structs. Each struct must
 * have a string as its first element, and the struct must be sorted
 * lexogrpahically by that element. */
static const void *dst_strbinsearch(
        const void *tab,
        size_t tabcount,
        size_t itemsize,
        const uint8_t *key) {
    size_t low = 0;
    size_t hi = tabcount;
    const char *t = (const char *)tab;
    while (low < hi) {
        size_t mid = low + ((hi - low) / 2);
        const char **item = (const char **)(t + mid * itemsize);
        const char *name = *item;
        int comp = dst_cstrcmp(key, name);
        if (comp < 0) {
            hi = mid;
        } else if (comp > 0) {
            low = mid + 1;
        } else {
            return (const void *)item;
        }
    }
    return NULL;
}

#endif