diff options
Diffstat (limited to 'source/blender/imbuf/intern/cineon/logmemfile.c')
| -rw-r--r-- | source/blender/imbuf/intern/cineon/logmemfile.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/source/blender/imbuf/intern/cineon/logmemfile.c b/source/blender/imbuf/intern/cineon/logmemfile.c new file mode 100644 index 00000000000..20359335933 --- /dev/null +++ b/source/blender/imbuf/intern/cineon/logmemfile.c @@ -0,0 +1,77 @@ +/* + * Cineon image file format library routines. + * + * Copyright 2006 Joseph Eagar (joeedh@gmail.com) + * + * 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 2 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, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "logImageCore.h" + +int logimage_fseek(void* logfile, long offsett, int origin) +{ + struct _Log_Image_File_t_ *file = (struct _Log_Image_File_t_*) logfile; + long offset = offsett; + + if (file->file) fseek(file->file, offset, origin); + else { /*we're seeking in memory*/ + if (origin==SEEK_SET) { + if (offset > file->membuffersize) return 1; + file->memcursor = file->membuffer + offset; + } else if (origin==SEEK_END) { + if (offset > file->membuffersize) return 1; + file->memcursor = (file->membuffer + file->membuffersize) - offset; + } else if (origin==SEEK_CUR) { + unsigned long pos = (unsigned long)file->membuffer - (unsigned long)file->memcursor; + if (pos + offset > file->membuffersize) return 1; + if (pos < 0) return 1; + file->memcursor += offset; + } + } + return 0; +} + +int logimage_fwrite(void *buffer, unsigned int size, unsigned int count, void *logfile) +{ + struct _Log_Image_File_t_ *file = (struct _Log_Image_File_t_*) logfile; + if (file->file) return fwrite(buffer, size, count, file->file); + else { /*we're writing to memory*/ + /*do nothing as this isn't supported yet*/ + return count; + } +} + +int logimage_fread(void *buffer, unsigned int size, unsigned int count, void *logfile) +{ + struct _Log_Image_File_t_ *file = (struct _Log_Image_File_t_*) logfile; + if (file->file) return fread(buffer, size, count, file->file); + else { /*we're reading from memory*/ + int i; + /*we convert ot uchar just on the off chance some platform can't handle + pointer arithmetic with type (void*). */ + unsigned char *buf = (unsigned char *) buffer; + + for (i=0; i<count; i++) { + memcpy(buf, file->memcursor, size); + file->memcursor += size; + buf += size; + } + return count; + } +} |