/* Convert Unicode/PdfDocEncoding string into utf-8 */
char *
pdf_to_utf8(fz_context *ctx, pdf_obj *src)
{
unsigned char *srcptr = (unsigned char *) pdf_to_str_buf(src);
char *dstptr, *dst;
int srclen = pdf_to_str_len(src);
int dstlen = 0;
int ucs;
int i;
if (srclen >= 2 && srcptr[0] == 254 && srcptr[1] == 255)
{
for (i = 2; i + 1 < srclen; i += 2)
{
ucs = srcptr[i] << 8 | srcptr[i+1];
dstlen += fz_runelen(ucs);
}
dstptr = dst = fz_malloc(ctx, dstlen + 1);
for (i = 2; i + 1 < srclen; i += 2)
{
ucs = srcptr[i] << 8 | srcptr[i+1];
dstptr += fz_runetochar(dstptr, ucs);
}
}
else if (srclen >= 2 && srcptr[0] == 255 && srcptr[1] == 254)
{
for (i = 2; i + 1 < srclen; i += 2)
{
ucs = srcptr[i] | srcptr[i+1] << 8;
dstlen += fz_runelen(ucs);
}
dstptr = dst = fz_malloc(ctx, dstlen + 1);
for (i = 2; i + 1 < srclen; i += 2)
{
ucs = srcptr[i] | srcptr[i+1] << 8;
dstptr += fz_runetochar(dstptr, ucs);
}
}
else
{
for (i = 0; i < srclen; i++)
dstlen += fz_runelen(pdf_doc_encoding[srcptr[i]]);
dstptr = dst = fz_malloc(ctx, dstlen + 1);
for (i = 0; i < srclen; i++)
{
ucs = pdf_doc_encoding[srcptr[i]];
dstptr += fz_runetochar(dstptr, ucs);
}
}
*dstptr = '\0';
return dst;
}
char *
fz_utf8_from_wchar(const wchar_t *s)
{
const wchar_t *src = s;
char *d;
char *dst;
int len = 1;
while (*src)
{
len += fz_runelen(*src++);
}
d = malloc(len);
if (d != NULL)
{
dst = d;
src = s;
while (*src)
{
dst += fz_runetochar(dst, *src++);
}
*dst = 0;
}
return d;
}
/* Convert Unicode/PdfDocEncoding string into utf-8 */
char *
pdf_to_utf8(pdf_document *doc, pdf_obj *src)
{
fz_context *ctx = doc->ctx;
fz_buffer *strmbuf = NULL;
unsigned char *srcptr;
char *dstptr, *dst;
int srclen;
int dstlen = 0;
int ucs;
int i;
fz_var(strmbuf);
fz_try(ctx)
{
if (pdf_is_string(src))
{
srcptr = (unsigned char *) pdf_to_str_buf(src);
srclen = pdf_to_str_len(src);
}
else if (pdf_is_stream(doc, pdf_to_num(src), pdf_to_gen(src)))
{
strmbuf = pdf_load_stream(doc, pdf_to_num(src), pdf_to_gen(src));
srclen = fz_buffer_storage(ctx, strmbuf, (unsigned char **)&srcptr);
}
else
{
srclen = 0;
}
if (srclen >= 2 && srcptr[0] == 254 && srcptr[1] == 255)
{
for (i = 2; i + 1 < srclen; i += 2)
{
ucs = srcptr[i] << 8 | srcptr[i+1];
dstlen += fz_runelen(ucs);
}
dstptr = dst = fz_malloc(ctx, dstlen + 1);
for (i = 2; i + 1 < srclen; i += 2)
{
ucs = srcptr[i] << 8 | srcptr[i+1];
dstptr += fz_runetochar(dstptr, ucs);
}
}
else if (srclen >= 2 && srcptr[0] == 255 && srcptr[1] == 254)
{
for (i = 2; i + 1 < srclen; i += 2)
{
ucs = srcptr[i] | srcptr[i+1] << 8;
dstlen += fz_runelen(ucs);
}
dstptr = dst = fz_malloc(ctx, dstlen + 1);
for (i = 2; i + 1 < srclen; i += 2)
{
ucs = srcptr[i] | srcptr[i+1] << 8;
dstptr += fz_runetochar(dstptr, ucs);
}
}
else
{
for (i = 0; i < srclen; i++)
dstlen += fz_runelen(pdf_doc_encoding[srcptr[i]]);
dstptr = dst = fz_malloc(ctx, dstlen + 1);
for (i = 0; i < srclen; i++)
{
ucs = pdf_replace_undefined(pdf_doc_encoding[srcptr[i]]);
dstptr += fz_runetochar(dstptr, ucs);
}
}
}
fz_always(ctx)
{
fz_drop_buffer(ctx, strmbuf);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
*dstptr = '\0';
return dst;
}
/* Convert Unicode/PdfDocEncoding string into utf-8 */
char *
pdf_to_utf8(fz_context *ctx, pdf_document *doc, pdf_obj *src)
{
fz_buffer *stmbuf = NULL;
unsigned char *srcptr;
char *dstptr, *dst;
size_t srclen;
size_t dstlen = 0;
int ucs;
size_t i;
fz_var(stmbuf);
fz_try(ctx)
{
if (pdf_is_string(ctx, src))
{
srcptr = (unsigned char *) pdf_to_str_buf(ctx, src);
srclen = pdf_to_str_len(ctx, src);
}
else if (pdf_is_stream(ctx, src))
{
stmbuf = pdf_load_stream(ctx, doc, pdf_to_num(ctx, src), pdf_to_gen(ctx, src));
srclen = fz_buffer_storage(ctx, stmbuf, (unsigned char **)&srcptr);
}
else
{
srclen = 0;
}
/* UTF-16BE */
if (srclen >= 2 && srcptr[0] == 254 && srcptr[1] == 255)
{
i = 2;
while (i + 2 <= srclen)
{
/* skip language escape codes */
if (i + 6 <= srclen &&
srcptr[i+0] == 0 && srcptr[i+1] == 27 &&
srcptr[i+4] == 0 && srcptr[i+5] == 27)
{
i += 6;
}
else if (i + 8 <= srclen &&
srcptr[i+0] == 0 && srcptr[i+1] == 27 &&
srcptr[i+6] == 0 && srcptr[i+7] == 27)
{
i += 8;
}
else
{
i += rune_from_utf16be(&ucs, srcptr + i, srcptr + srclen);
dstlen += fz_runelen(ucs);
}
}
dstptr = dst = fz_malloc(ctx, dstlen + 1);
i = 2;
while (i + 2 <= srclen)
{
/* skip language escape codes */
if (i + 6 <= srclen &&
srcptr[i+0] == 0 && srcptr[i+1] == 27 &&
srcptr[i+4] == 0 && srcptr[i+5] == 27)
{
i += 6;
}
else if (i + 8 <= srclen &&
srcptr[i+0] == 0 && srcptr[i+1] == 27 &&
srcptr[i+6] == 0 && srcptr[i+7] == 27)
{
i += 8;
}
else
{
i += rune_from_utf16be(&ucs, srcptr + i, srcptr + srclen);
dstptr += fz_runetochar(dstptr, ucs);
}
}
}
/* PDFDocEncoding */
else
{
for (i = 0; i < srclen; i++)
dstlen += fz_runelen(pdf_doc_encoding[srcptr[i]]);
dstptr = dst = fz_malloc(ctx, dstlen + 1);
for (i = 0; i < srclen; i++)
{
ucs = pdf_doc_encoding[srcptr[i]];
dstptr += fz_runetochar(dstptr, ucs);
}
}
}
fz_always(ctx)
{
fz_drop_buffer(ctx, stmbuf);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
*dstptr = '\0';
return dst;
}
