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/* Chunk handling: Flexible arrays
** ===============================
**
*/
#include "../config.h"
#include "HTUtils.h"
#include "HTChunk.h"
#include <stdio.h>
/* Create a chunk with a certain allocation unit
** --------------
*/
PUBLIC HTChunk * HTChunkCreate ARGS1 (int,grow)
{
HTChunk * ch = (HTChunk *) malloc(sizeof(HTChunk));
if (ch == NULL) outofmem(__FILE__, "cretion of chunk");
ch->data = 0;
ch->growby = grow;
ch->size = 0;
ch->allocated = 0;
return ch;
}
/* Clear a chunk of all data
** --------------------------
*/
PUBLIC void HTChunkClear ARGS1 (HTChunk *,ch)
{
if (ch->data) {
free(ch->data);
ch->data = 0;
}
ch->size = 0;
ch->allocated = 0;
}
/* Free a chunk
** ------------
*/
PUBLIC void HTChunkFree ARGS1 (HTChunk *,ch)
{
if (ch->data) free(ch->data);
free(ch);
}
/* Append a character
** ------------------
*/
PUBLIC void HTChunkPutc ARGS2 (HTChunk *,ch, char,c)
{
if (ch->size >= ch->allocated) {
ch->allocated = ch->allocated + ch->growby;
ch->data = ch->data ? (char *)realloc(ch->data, ch->allocated)
: (char *)malloc(ch->allocated);
if (!ch->data) outofmem(__FILE__, "HTChunkPutc");
}
ch->data[ch->size++] = c;
}
/* Ensure a certain size
** ---------------------
*/
PUBLIC void HTChunkEnsure ARGS2 (HTChunk *,ch, int,needed)
{
if (needed <= ch->allocated) return;
ch->allocated = needed-1 - ((needed-1) % ch->growby)
+ ch->growby; /* Round up */
ch->data = ch->data ? (char *)realloc(ch->data, ch->allocated)
: (char *)malloc(ch->allocated);
if (ch->data == NULL) outofmem(__FILE__, "HTChunkEnsure");
}
/* Terminate a chunk
** -----------------
*/
PUBLIC void HTChunkTerminate ARGS1 (HTChunk *,ch)
{
HTChunkPutc(ch, (char)0);
}
/* Append a string
** ---------------
*/
PUBLIC void HTChunkPuts ARGS2 (HTChunk *,ch, WWW_CONST char *,s)
{
WWW_CONST char * p;
for (p=s; *p; p++)
HTChunkPutc(ch, *p);
}
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