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Imported from libpng-1.0.5a.tar

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This commit is contained in:
Glenn Randers-Pehrson
1999-10-23 08:39:18 -05:00
parent 860ab2b1c0
commit 6d8f3b080a
65 changed files with 1729 additions and 214 deletions
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33
pngset.c
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@@ -1,7 +1,7 @@
/* pngset.c - storage of image information into info struct
*
* libpng 1.0.5 - October 15, 1999
* libpng 1.0.5a - October 23, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
@@ -317,9 +317,10 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
for (i = 0; i < num_text; i++)
{
png_textp textp = &(info_ptr->text[info_ptr->num_text]);
png_charp key,text;
if (text_ptr[i].text == NULL)
text_ptr[i].text = (png_charp)"";
if (text_ptr[i].key == (png_charp)NULL)
continue;
if (text_ptr[i].text[0] == '\0')
{
@@ -331,8 +332,30 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
textp->text_length = png_strlen(text_ptr[i].text);
textp->compression = text_ptr[i].compression;
}
textp->text = text_ptr[i].text;
textp->key = text_ptr[i].key;
key=text_ptr[i].key;
for (text = key; *text++;)
/* empty loop to find the byte after the zero byte after the
end of key */ ;
textp->key = (png_charp)png_malloc(png_ptr,
(png_uint_32)(text+textp->text_length - key)+1);
/* Caution: the calling program, not libpng, is responsible for
freeing this, if libpng wasn't the caller. */
png_debug2(2, "Allocated %d bytes at %x in png_set_text\n",
text+textp->text_length-key+1, textp->key);
png_memcpy(textp->key, text_ptr[i].key,
(png_size_t)(text - key)); /* includes the zero-byte separator */
textp->text = textp->key + (text-key);
if(textp->text_length)
{
png_memcpy(textp->text, text_ptr[i].text,
(png_size_t)(textp->text_length));
*(textp->text+textp->text_length) = '\0';
}
else
textp->text--;
info_ptr->text[info_ptr->num_text]= *textp;
info_ptr->num_text++;
png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
}