You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
61 lines
1.2 KiB
61 lines
1.2 KiB
3 months ago
|
/*
|
||
|
|
* UCW Library -- Character Conversion with Allocation on the Stack
|
||
|
|
*
|
||
|
|
* (c) 2006 Pavel Charvat <pchar@ucw.cz>
|
||
|
|
*
|
||
|
|
* This software may be freely distributed and used according to the terms
|
||
|
|
* of the GNU Lesser General Public License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <ucw/lib.h>
|
||
|
|
#include <charset/stk-charconv.h>
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
#define INITIAL_MIN_SIZE 16
|
||
|
|
#define INITIAL_SCALE 2
|
||
|
|
|
||
|
|
uint
|
||
|
|
stk_strconv_init(struct conv_context *c, const byte *s, uint in_cs, uint out_cs)
|
||
|
|
{
|
||
|
|
uint l = strlen(s);
|
||
|
|
if (in_cs == out_cs)
|
||
|
|
{
|
||
|
|
c->source = s;
|
||
|
|
c->source_end = NULL;
|
||
|
|
return l + 1;
|
||
|
|
}
|
||
|
|
conv_init(c);
|
||
|
|
conv_set_charset(c, in_cs, out_cs);
|
||
|
|
c->source = s;
|
||
|
|
c->source_end = s + l + 1;
|
||
|
|
if (l < (INITIAL_MIN_SIZE - 1) / INITIAL_SCALE)
|
||
|
|
return INITIAL_MIN_SIZE;
|
||
|
|
else
|
||
|
|
return l * INITIAL_SCALE + 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
uint
|
||
|
|
stk_strconv_step(struct conv_context *c, byte *buf, uint len)
|
||
|
|
{
|
||
|
|
if (!c->source_end)
|
||
|
|
{
|
||
|
|
memcpy(buf, c->source, len);
|
||
|
|
c->dest_start = buf;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
if (c->dest_start)
|
||
|
|
{
|
||
|
|
uint l = c->dest_end - c->dest_start;
|
||
|
|
memcpy(buf, c->dest_start, l);
|
||
|
|
c->dest = buf + l;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
c->dest = buf;
|
||
|
|
c->dest_start = buf;
|
||
|
|
c->dest_end = buf + len;
|
||
|
|
if (conv_run(c) & CONV_SOURCE_END)
|
||
|
|
return 0;
|
||
|
|
return len << 1;
|
||
|
|
}
|
||
|
|
|