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/*
* Hedgewars, a free turn based strategy game
* Copyright (C) 2012 Simeon Maxein <smaxein@googlemail.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "buffer.h"
#include "logging.h"
#include "util.h"
#include <stdlib.h>
#include <limits.h>
#include <string.h>
#define MIN_VECTOR_CAPACITY 16
struct _flib_vector {
void *data;
size_t size;
size_t capacity;
};
flib_vector *flib_vector_create() {
flib_vector *result = NULL;
flib_vector *tmpVector = flib_calloc(1, sizeof(flib_vector));
if(tmpVector) {
tmpVector->data = flib_malloc(MIN_VECTOR_CAPACITY);
if(tmpVector->data) {
tmpVector->size = 0;
tmpVector->capacity = MIN_VECTOR_CAPACITY;
result = tmpVector;
tmpVector = NULL;
}
}
flib_vector_destroy(tmpVector);
return result;
}
void flib_vector_destroy(flib_vector *vec) {
if(vec) {
free(vec->data);
free(vec);
}
}
static int setCapacity(flib_vector *vec, size_t newCapacity) {
if(newCapacity == vec->capacity) {
return 0;
}
void *newData = realloc(vec->data, newCapacity);
if(newData) {
vec->data = newData;
vec->capacity = newCapacity;
return 0;
} else {
return -1;
}
}
static int allocateExtraCapacity(flib_vector *vec, size_t extraCapacity) {
if(extraCapacity <= SIZE_MAX - vec->capacity) {
return setCapacity(vec, vec->capacity + extraCapacity);
} else {
return -1;
}
}
int flib_vector_resize(flib_vector *vec, size_t newSize) {
if(log_badargs_if(vec==NULL)) {
return -1;
}
if(vec->capacity < newSize) {
// Resize exponentially for constant amortized time,
// But at least by as much as we need of course
size_t extraCapacity = (vec->capacity)/2;
size_t minExtraCapacity = newSize - vec->capacity;
if(extraCapacity < minExtraCapacity) {
extraCapacity = minExtraCapacity;
}
if(allocateExtraCapacity(vec, extraCapacity)) {
allocateExtraCapacity(vec, minExtraCapacity);
}
} else if(vec->capacity/2 > newSize) {
size_t newCapacity = newSize+newSize/4;
if(newCapacity < MIN_VECTOR_CAPACITY) {
newCapacity = MIN_VECTOR_CAPACITY;
}
setCapacity(vec, newCapacity);
}
if(vec->capacity >= newSize) {
vec->size = newSize;
return 0;
} else {
return -1;
}
}
int flib_vector_append(flib_vector *vec, const void *data, size_t len) {
if(!log_badargs_if2(vec==NULL, data==NULL && len>0)
&& !log_oom_if(len > SIZE_MAX-vec->size)) {
size_t oldSize = vec->size;
if(!log_oom_if(flib_vector_resize(vec, vec->size+len))) {
memmove(((uint8_t*)vec->data) + oldSize, data, len);
return 0;
}
}
return -1;
}
int flib_vector_appendf(flib_vector *vec, const char *fmt, ...) {
int result = -1;
if(!log_badargs_if2(vec==NULL, fmt==NULL)) {
va_list argp;
va_start(argp, fmt);
char *formatted = flib_vasprintf(fmt, argp);
va_end(argp);
if(formatted) {
size_t len = strlen(formatted);
result = flib_vector_append(vec, formatted, len);
}
}
return result;
}
flib_buffer flib_vector_as_buffer(flib_vector *vec) {
if(log_badargs_if(vec==NULL)) {
flib_buffer result = {NULL, 0};
return result;
} else {
flib_buffer result = {vec->data, vec->size};
return result;
}
}
flib_constbuffer flib_vector_as_constbuffer(flib_vector *vec) {
if(log_badargs_if(vec==NULL)) {
flib_constbuffer result = {NULL, 0};
return result;
} else {
flib_constbuffer result = {vec->data, vec->size};
return result;
}
}
void *flib_vector_data(flib_vector *vec) {
if(log_badargs_if(vec==NULL)) {
return NULL;
} else {
return vec->data;
}
}
size_t flib_vector_size(flib_vector *vec) {
if(log_badargs_if(vec==NULL)) {
return 0;
} else {
return vec->size;
}
}
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