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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "buffer.h"
buffer_t *buffer_new(int n)
{
buffer_t *new;
new = malloc(sizeof(buffer_t));
memset(new, 0, sizeof(buffer_t));
new->alloc = n;
new->data = malloc(n);
memset(new->data, 0, n);
return new;
}
void *buffer_get_data(buffer_t * p)
{
return p->data;
}
int buffer_get_size(buffer_t * p)
{
return p->size;
}
int buffer_append(buffer_t * p, char *data, int len)
{
assert(p != NULL);
assert(data != NULL);
assert(len >= 0);
if (p->size + len <= p->alloc) {
memcpy(p->data + p->size, data, len);
p->size += len;
return len;
}
return -1;
}
int buffer_cut(buffer_t * p, int len)
{
assert(p != NULL);
assert(len >= 0);
if (p->size - len >= 0) {
memmove(p->data, p->data + len, p->size - len);
p->size -= len;
return 0;
}
return -1;
}
int buffer_count_line(buffer_t * p)
{
char *begin;
char *end;
int count;
int size;
assert(p != NULL);
count = 0;
begin = p->data;
size = p->size;
while ((end = memchr(begin, '\n', size)) != NULL) {
count++;
size -= ((end + 1) - begin);
begin = end + 1;
}
//printf("count = %d\n", count);
//printf("data = %s\n", p->data);
return count;
}
int buffer_get_line(buffer_t * p, char *line, int len)
{
char *end;
int ret_len;
assert(p != NULL);
assert(line != NULL);
assert(len >= 0);
end = NULL;
end = memchr(p->data, '\n', p->size);
if (end == NULL)
return -1;
ret_len = (int) (end - p->data) + 1;
if (ret_len > len - 1)
ret_len = len - 1;
memset(line, 0, len);
memcpy(line, p->data, ret_len);
buffer_cut(p, ret_len);
return ret_len;
}
int buffer_get_data_len(buffer_t * p, char *line, int len)
{
assert(p != NULL);
assert(line != NULL);
assert(len >= 0);
if ((unsigned)p->size < (unsigned)len) {
len = p->size;
}
memcpy(line, p->data, len);
buffer_cut(p, len);
return len;
}
void buffer_destroy(buffer_t * p)
{
assert(p != NULL);
if (p->data != NULL)
free(p->data);
free(p);
}
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