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/*
* Copyright (c) 2019-2021 David Timber <mieabby@gmail.com>
*
* 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.
*/
#include "imap.h"
#include "util_rt.h"
#include <stdlib.h>
#include <string.h>
static int imap_cmp_func (const void *in_a, const void *in_b) {
const prne_imap_tuple_t *a = (const prne_imap_tuple_t*)in_a;
const prne_imap_tuple_t *b = (const prne_imap_tuple_t*)in_b;
return
a->key < b->key ? -1 :
a->key > b->key ? 1 :
0;
}
void prne_init_imap (prne_imap_t *im) {
im->tbl = NULL;
im->size = 0;
}
void prne_free_imap (prne_imap_t *im) {
prne_free(im->tbl);
im->tbl = NULL;
im->size = 0;
}
void prne_imap_clear (prne_imap_t *im) {
prne_free(im->tbl);
im->tbl = NULL;
im->size = 0;
}
const prne_imap_tuple_t *prne_imap_insert (
prne_imap_t *im,
const prne_imap_key_type_t key,
const prne_imap_val_type_t val)
{
prne_imap_tuple_t *ret;
prne_imap_tuple_t t;
t.key = key;
t.val = val;
ret = (prne_imap_tuple_t*)bsearch(
&t,
im->tbl,
im->size,
sizeof(prne_imap_tuple_t),
imap_cmp_func);
if (ret == NULL) {
void *ny_mem;
ny_mem = prne_realloc(im->tbl, sizeof(prne_imap_tuple_t), im->size + 1);
if (ny_mem == NULL) {
return NULL;
}
im->tbl = (prne_imap_tuple_t*)ny_mem;
im->tbl[im->size] = t;
im->size += 1;
qsort(im->tbl, im->size, sizeof(prne_imap_tuple_t), imap_cmp_func);
ret = (prne_imap_tuple_t*)prne_imap_lookup(im, key);
}
else {
ret->val = t.val;
}
return ret;
}
void prne_imap_erase (prne_imap_t *im, const prne_imap_key_type_t key) {
prne_imap_tuple_t *ext;
prne_imap_tuple_t t;
t.key = key;
t.val = 0;
ext = bsearch(
&t,
im->tbl,
im->size,
sizeof(prne_imap_tuple_t),
imap_cmp_func);
if (ext == NULL) {
return;
}
if (im->size - 1 == 0) {
prne_free(im->tbl);
im->tbl = NULL;
im->size = 0;
}
else {
void *ny_mem;
memmove(
ext,
ext + 1,
sizeof(prne_imap_tuple_t) * (im->size - 1 - (ext - im->tbl)));
im->size -= 1;
ny_mem = prne_realloc(im->tbl, sizeof(prne_imap_tuple_t), im->size);
if (ny_mem != NULL) {
im->tbl = (prne_imap_tuple_t*)ny_mem;
}
}
}
const prne_imap_tuple_t *prne_imap_lookup (
prne_imap_t *im,
const prne_imap_key_type_t key)
{
prne_imap_tuple_t t;
t.key = key;
t.val = 0;
return (const prne_imap_tuple_t*)bsearch(
&t,
im->tbl,
im->size,
sizeof(prne_imap_tuple_t),
imap_cmp_func);
}
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