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/*
** Copyright 2011 Double Precision, Inc.
** See COPYING for distribution information.
**
*/
#include "unicode_config.h"
#include "courier-unicode.h"
#include <stdlib.h>
#include <string.h>
void unicode_buf_init(struct unicode_buf *p, size_t max)
{
p->ptr=0;
p->size=0;
p->len=0;
p->max=max;
}
void unicode_buf_deinit(struct unicode_buf *p)
{
if (p->ptr)
free(p->ptr);
}
int unicode_buf_append(struct unicode_buf *p,
const char32_t *uc, size_t l)
{
if (l > p->max-p->len)
l=p->max-p->len;
if (p->len + l > p->size)
{
size_t n=(p->len + l) * 2;
char32_t *newp;
if (n < 256)
n=256;
if (n > p->max)
n=p->max;
newp=p->ptr ? realloc(p->ptr, n * sizeof(char32_t))
: malloc(n * sizeof(char32_t));
if (!newp)
return -1;
p->ptr=newp;
p->size=n;
}
memcpy(p->ptr + p->len, uc, l * sizeof(char32_t));
p->len += l;
return 0;
}
void unicode_buf_append_char(struct unicode_buf *dst,
const char *str,
size_t cnt)
{
char32_t unicode_buf[256];
while (cnt)
{
size_t n=sizeof(unicode_buf)/sizeof(unicode_buf[0]), i;
if (n > cnt)
n=cnt;
for (i=0; i<n; ++i)
unicode_buf[i]=(unsigned char)str[i];
str += n;
cnt -= n;
unicode_buf_append(dst, unicode_buf, i);
}
}
void unicode_buf_remove(struct unicode_buf *p,
size_t pos,
size_t cnt)
{
if (pos > p->len)
pos=p->len;
if (cnt > p->len-pos)
cnt=p->len-pos;
if (cnt)
memmove(p->ptr+pos, p->ptr+pos+cnt,
(p->len-pos-cnt) * sizeof(char32_t));
p->len -= cnt;
}
int unicode_buf_cmp(const struct unicode_buf *a,
const struct unicode_buf *b)
{
size_t i;
for (i=0; i<a->len && i<b->len; i++)
{
if (a->ptr[i] < b->ptr[i])
return -1;
if (a->ptr[i] > b->ptr[i])
return 1;
}
return (a->len < b->len ? -1:a->len > b->len ? 1:0);
}
int unicode_buf_cmp_str(const struct unicode_buf *p, const char *c,
size_t cl)
{
size_t i;
for (i=0; i<p->len && i < cl; ++i)
{
if (p->ptr[i] < c[i])
return -1;
if (p->ptr[i] > c[i])
return 1;
}
return (p->len < cl ? -1: p->len > cl ? 1:0);
}
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