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/* Chunk handling: Flexible arrays
** ===============================
**
*/
#include <HTUtils.h>
#include <HTChunk.h>
#include <LYLeaks.h>
/* Create a chunk with a certain allocation unit
** --------------
*/
PUBLIC HTChunk * HTChunkCreate ARGS1 (int,grow)
{
HTChunk * ch = (HTChunk *) calloc(1, sizeof(HTChunk));
if (ch == NULL)
outofmem(__FILE__, "creation of chunk");
ch->data = 0;
ch->growby = grow;
ch->size = 0;
ch->allocated = 0;
return ch;
}
/* Create a chunk with a certain allocation unit and ensured size
** --------------
*/
PUBLIC HTChunk * HTChunkCreate2 ARGS2 (int,grow, size_t, needed)
{
HTChunk * ch = (HTChunk *) calloc(1, sizeof(HTChunk));
if (ch == NULL)
outofmem(__FILE__, "HTChunkCreate2");
ch->growby = grow;
if (needed > 0) {
ch->allocated = needed-1 - ((needed-1) % ch->growby)
+ ch->growby; /* Round up */
ch->data = (char *)calloc(1, ch->allocated);
if (!ch->data)
outofmem(__FILE__, "HTChunkCreate2 data");
}
ch->size = 0;
return ch;
}
/* Clear a chunk of all data
** --------------------------
*/
PUBLIC void HTChunkClear ARGS1 (HTChunk *,ch)
{
FREE(ch->data);
ch->size = 0;
ch->allocated = 0;
}
/* Free a chunk
** ------------
*/
PUBLIC void HTChunkFree ARGS1 (HTChunk *,ch)
{
FREE(ch->data);
FREE(ch);
}
/* Append a character
** ------------------
*/
/* Warning: the code of this function is defined as macro in SGML.c. Change
the macro or undefine it in SGML.c when changing this function. -VH */
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 *)calloc(1, 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 *)calloc(1, ch->allocated);
if (ch->data == NULL)
outofmem(__FILE__, "HTChunkEnsure");
}
PUBLIC void HTChunkPutb ARGS3 (HTChunk *,ch, CONST char *,b, int,l)
{
int needed = ch->size + l;
if (l <= 0) return;
if (needed > ch->allocated) {
ch->allocated = needed-1 - ((needed-1) % ch->growby)
+ ch->growby; /* Round up */
ch->data = ch->data ? (char *)realloc(ch->data, ch->allocated)
: (char *)calloc(1, ch->allocated);
if (ch->data == NULL)
outofmem(__FILE__, "HTChunkPutb");
}
memcpy(ch->data + ch->size, b, l);
ch->size += l;
}
#define PUTC(code) ch->data[ch->size++] = (char)(code)
#define PUTC2(code) ch->data[ch->size++] = (char)(0x80|(0x3f &(code)))
PUBLIC void HTChunkPutUtf8Char ARGS2(
HTChunk *, ch,
UCode_t, code)
{
int utflen;
if (code < 128)
utflen = 1;
else if (code < 0x800L) {
utflen = 2;
} else if (code < 0x10000L) {
utflen = 3;
} else if (code < 0x200000L) {
utflen = 4;
} else if (code < 0x4000000L) {
utflen = 5;
} else if (code<=0x7fffffffL) {
utflen = 6;
} else
utflen = 0;
if (ch->size + utflen > ch->allocated) {
int growby = (ch->growby >= utflen) ? ch->growby : utflen;
ch->allocated = ch->allocated + growby;
ch->data = ch->data ? (char *)realloc(ch->data, ch->allocated)
: (char *)calloc(1, ch->allocated);
if (!ch->data)
outofmem(__FILE__, "HTChunkPutUtf8Char");
}
switch (utflen) {
case 0:
return;
case 1:
ch->data[ch->size++] = (char)code;
return;
case 2:
PUTC(0xc0 | (code>>6));
break;
case 3:
PUTC(0xe0 | (code>>12));
break;
case 4:
PUTC(0xf0 | (code>>18));
break;
case 5:
PUTC(0xf8 | (code>>24));
break;
case 6:
PUTC(0xfc | (code>>30));
}
switch (utflen) {
case 6:
PUTC2(code>>24);
case 5:
PUTC2(code>>18);
case 4:
PUTC2(code>>12);
case 3:
PUTC2(code>>6);
case 2:
PUTC2(code);
}
}
/* Terminate a chunk
** -----------------
*/
PUBLIC void HTChunkTerminate ARGS1 (HTChunk *,ch)
{
HTChunkPutc(ch, (char)0);
}
/* Append a string
** ---------------
*/
PUBLIC void HTChunkPuts ARGS2 (HTChunk *,ch, CONST char *,s)
{
CONST char * p;
for (p=s; *p; p++)
HTChunkPutc(ch, *p);
}
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