diff options
Diffstat (limited to 'app/xcf/xcf-read.c')
| -rw-r--r-- | app/xcf/xcf-read.c | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/app/xcf/xcf-read.c b/app/xcf/xcf-read.c new file mode 100644 index 0000000..1c53436 --- /dev/null +++ b/app/xcf/xcf-read.c @@ -0,0 +1,274 @@ +/* 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 <https://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include <gio/gio.h> + +#include "libgimpbase/gimpbase.h" + +#include "core/core-types.h" + +#include "xcf-private.h" +#include "xcf-read.h" + +#include "gimp-intl.h" + + +#define MAX_XCF_STRING_LEN (16L * 1024 * 1024) + + +guint +xcf_read_int8 (XcfInfo *info, + guint8 *data, + gint count) +{ + gsize bytes_read = 0; + + /* we allow for 'data == NULL && count == 0', which g_input_stream_read_all() + * rejects. + */ + if (count > 0) + { + g_input_stream_read_all (info->input, data, count, + &bytes_read, NULL, NULL); + + info->cp += bytes_read; + } + + return bytes_read; +} + +guint +xcf_read_int16 (XcfInfo *info, + guint16 *data, + gint count) +{ + guint total = 0; + + if (count > 0) + { + total += xcf_read_int8 (info, (guint8 *) data, count * 2); + + while (count--) + { + *data = g_ntohs (*data); + data++; + } + } + + return total; +} + +guint +xcf_read_int32 (XcfInfo *info, + guint32 *data, + gint count) +{ + guint total = 0; + + if (count > 0) + { + total += xcf_read_int8 (info, (guint8 *) data, count * 4); + + while (count--) + { + *data = g_ntohl (*data); + data++; + } + } + + return total; +} + +guint +xcf_read_int64 (XcfInfo *info, + guint64 *data, + gint count) +{ + guint total = 0; + + if (count > 0) + { + total += xcf_read_int8 (info, (guint8 *) data, count * 8); + + while (count--) + { + *data = GINT64_FROM_BE (*data); + data++; + } + } + + return total; +} + +guint +xcf_read_offset (XcfInfo *info, + goffset *data, + gint count) +{ + guint total = 0; + + if (count > 0) + { + if (info->bytes_per_offset == 4) + { + gint32 *int_offsets = g_alloca (count * sizeof (gint32)); + + total += xcf_read_int8 (info, (guint8 *) int_offsets, count * 4); + + while (count--) + { + *data = g_ntohl (*int_offsets); + int_offsets++; + data++; + } + } + else + { + total += xcf_read_int8 (info, (guint8 *) data, count * 8); + + while (count--) + { + *data = GINT64_FROM_BE (*data); + data++; + } + } + } + + return total; +} + +guint +xcf_read_float (XcfInfo *info, + gfloat *data, + gint count) +{ + return xcf_read_int32 (info, (guint32 *) ((void *) data), count); +} + +guint +xcf_read_string (XcfInfo *info, + gchar **data, + gint count) +{ + guint total = 0; + gint i; + + for (i = 0; i < count; i++) + { + guint32 tmp; + + total += xcf_read_int32 (info, &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 (info, (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; +} + +guint +xcf_read_component (XcfInfo *info, + gint bpc, + guint8 *data, + gint count) +{ + switch (bpc) + { + case 1: + return xcf_read_int8 (info, data, count); + + case 2: + return xcf_read_int16 (info, (guint16 *) data, count); + + case 4: + return xcf_read_int32 (info, (guint32 *) data, count); + + case 8: + return xcf_read_int64 (info, (guint64 *) data, count); + + default: + break; + } + + return 0; +} + +void +xcf_read_from_be (gint bpc, + guint8 *data, + gint count) +{ + gint i; + + switch (bpc) + { + case 1: + break; + + case 2: + { + guint16 *d = (guint16 *) data; + + for (i = 0; i < count; i++) + d[i] = g_ntohs (d[i]); + } + break; + + case 4: + { + guint32 *d = (guint32 *) data; + + for (i = 0; i < count; i++) + d[i] = g_ntohl (d[i]); + } + break; + + case 8: + { + guint64 *d = (guint64 *) data; + + for (i = 0; i < count; i++) + d[i] = GINT64_FROM_BE (d[i]); + } + break; + } +} |