121 lines
2.5 KiB
C
121 lines
2.5 KiB
C
#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Copyright (c) 2014 rxi
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*
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* This library is free software; you can redistribute it and/or modify it
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* under the terms of the MIT license. See LICENSE for details.
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*/
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#include "vec.h"
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int vec_expand_(char **data, int *length, int *capacity, int memsz) {
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if (*length + 1 > *capacity) {
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void *ptr;
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int n = (*capacity == 0) ? 1 : *capacity << 1;
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ptr = realloc(*data, n * memsz);
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if (ptr == NULL) return -1;
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*data = ptr;
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*capacity = n;
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}
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return 0;
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}
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int vec_reserve_(char **data, int *length, int *capacity, int memsz, int n) {
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(void) length;
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if (n > *capacity) {
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void *ptr = realloc(*data, n * memsz);
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if (ptr == NULL) return -1;
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*data = ptr;
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*capacity = n;
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}
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return 0;
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}
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int vec_reserve_po2_(
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char **data, int *length, int *capacity, int memsz, int n
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) {
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int n2 = 1;
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if (n == 0) return 0;
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while (n2 < n) n2 <<= 1;
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return vec_reserve_(data, length, capacity, memsz, n2);
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}
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int vec_compact_(char **data, int *length, int *capacity, int memsz) {
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if (*length == 0) {
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free(*data);
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*data = NULL;
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*capacity = 0;
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return 0;
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} else {
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void *ptr;
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int n = *length;
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ptr = realloc(*data, n * memsz);
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if (ptr == NULL) return -1;
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*capacity = n;
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*data = ptr;
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}
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return 0;
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}
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int vec_insert_(char **data, int *length, int *capacity, int memsz,
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int idx
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) {
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int err = vec_expand_(data, length, capacity, memsz);
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if (err) return err;
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memmove(*data + (idx + 1) * memsz,
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*data + idx * memsz,
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(*length - idx) * memsz);
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return 0;
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}
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void vec_splice_(char **data, int *length, int *capacity, int memsz,
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int start, int count
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) {
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(void) capacity;
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memmove(*data + start * memsz,
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*data + (start + count) * memsz,
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(*length - start - count) * memsz);
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}
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void vec_swapsplice_(char **data, int *length, int *capacity, int memsz,
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int start, int count
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) {
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(void) capacity;
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memmove(*data + start * memsz,
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*data + (*length - count) * memsz,
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count * memsz);
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}
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void vec_swap_(char **data, int *length, int *capacity, int memsz,
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int idx1, int idx2
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) {
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unsigned char *a, *b, tmp;
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int count;
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(void) length;
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(void) capacity;
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if (idx1 == idx2) return;
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a = (unsigned char*) *data + idx1 * memsz;
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b = (unsigned char*) *data + idx2 * memsz;
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count = memsz;
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while (count--) {
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tmp = *a;
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*a = *b;
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*b = tmp;
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a++, b++;
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}
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}
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#ifdef __cplusplus
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}
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#endif
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