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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdio.h>
#include <glib-object.h>
#include "libgimpbase/gimpbase.h"
#include "xcf-read.h"
#include "gimp-intl.h"
/**
* SECTION:xcf-read
* @Short_description:XCF reading functions
*
* Low-level XCF reading functions
*/
/**
* MAX_XCF_STRING_LEN:
<<<<<<< Upstream, based on origin/osx-build
*
* Maximum length of a string in an XCF file ((16L * 1024 * 1024) bytes)
=======
* @MAX_XCF_STRING_LEN: maximum length of a string in an XCF file
* ((16L * 1024 * 1024) bytes)
>>>>>>> 059857a API-doc minor fixes
*/
#define MAX_XCF_STRING_LEN (16L * 1024 * 1024)
/**
* xcf_read_int32:
* @fp: input file stream
* @data: destination data array
* @count: number of words to read
*
* Read @count 4-byte-words from @fp into @data.
* The functions respects the machine specific byte order.
*
* Returns: number of read bytes (not words)
*/
guint
xcf_read_int32 (FILE *fp,
guint32 *data,
gint count)
{
guint total = 0;
if (count > 0)
{
total += xcf_read_int8 (fp, (guint8 *) data, count * 4);
while (count--)
{
*data = g_ntohl (*data);
data++;
}
}
return total;
}
/**
* xcf_read_float:
* @fp: input file stream
* @data: destination data array
* @count: number of words to read
*
* Read @count float values from @fp into @data.
*
* Returns: number of read bytes
*/
guint
xcf_read_float (FILE *fp,
gfloat *data,
gint count)
{
return xcf_read_int32 (fp, (guint32 *) ((void *) data), count);
}
/**
* xcf_read_int8:
* @fp: input file stream
* @data: destination data array
* @count: number of bytes to read
*
* Read @count bytes from @fp into @data.
*
* Returns: number of read bytes
*/
guint
xcf_read_int8 (FILE *fp,
guint8 *data,
gint count)
{
guint total = 0;
while (count > 0)
{
gint bytes = fread ((char *) data, sizeof (char), count, fp);
if (bytes <= 0) /* something bad happened */
break;
total += bytes;
count -= bytes;
data += bytes;
}
return total;
}
/**
* xcf_read_string:
* @fp: input file stream
* @data: destination data array
* @count: number of strings to read
*
* Read @count bytes from @fp into @data
* and convert them to UTF8.
*
* Returns: number of read bytes
*/
guint
xcf_read_string (FILE *fp,
gchar **data,
gint count)
{
guint total = 0;
gint i;
for (i = 0; i < count; i++)
{
guint32 tmp;
total += xcf_read_int32 (fp, &tmp, 1);
if (tmp > MAX_XCF_STRING_LEN)
{
g_warning ("Maximum string length (%ld bytes) exceeded. "
"Possibly corrupt XCF file.", MAX_XCF_STRING_LEN);
data[i] = NULL;
}
else if (tmp > 0)
{
gchar *str;
str = g_new (gchar, tmp);
total += xcf_read_int8 (fp, (guint8*) str, tmp);
if (str[tmp - 1] != '\0')
str[tmp - 1] = '\0';
data[i] = gimp_any_to_utf8 (str, -1,
_("Invalid UTF-8 string in XCF file"));
g_free (str);
}
else
{
data[i] = NULL;
}
}
return total;
}
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