From 72212c137c574b564723327af751c4054c7cfca6 Mon Sep 17 00:00:00 2001
From: David Woodhouse <dwmw2@shinybook.infradead.org>
Date: Tue, 11 Apr 2006 19:09:16 -0400
Subject: Initial commit

---
 compr.h | 115 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 compr.h

(limited to 'compr.h')

diff --git a/compr.h b/compr.h
new file mode 100644
index 0000000..a30d953
--- /dev/null
+++ b/compr.h
@@ -0,0 +1,115 @@
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ *
+ * Copyright (C) 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>,
+ *                    University of Szeged, Hungary
+ *
+ * For licensing information, see the file 'LICENCE' in the
+ * jffs2 directory.
+ *
+ * $Id: compr.h,v 1.7 2005/11/07 11:15:09 gleixner Exp $
+ *
+ */
+
+#ifndef __JFFS2_COMPR_H__
+#define __JFFS2_COMPR_H__
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include "linux/jffs2.h"
+
+#define CONFIG_JFFS2_ZLIB
+#define CONFIG_JFFS2_RTIME
+
+#define JFFS2_RUBINMIPS_PRIORITY 10
+#define JFFS2_DYNRUBIN_PRIORITY  20
+#define JFFS2_RTIME_PRIORITY     50
+#define JFFS2_ZLIB_PRIORITY      60
+
+#define JFFS2_COMPR_MODE_NONE       0
+#define JFFS2_COMPR_MODE_PRIORITY   1
+#define JFFS2_COMPR_MODE_SIZE       2
+
+#define kmalloc(a,b)                malloc(a)
+#define kfree(a)                    free(a)
+#ifndef GFP_KERNEL
+#define GFP_KERNEL                  0
+#endif
+
+#define vmalloc(a)                  malloc(a)
+#define vfree(a)                    free(a)
+
+#define printk(...)                 fprintf(stderr,__VA_ARGS__)
+
+#define KERN_EMERG
+#define KERN_ALERT
+#define KERN_CRIT
+#define KERN_ERR
+#define KERN_WARNING
+#define KERN_NOTICE
+#define KERN_INFO
+#define KERN_DEBUG
+
+struct list_head {
+        struct list_head *next, *prev;
+};
+
+void jffs2_set_compression_mode(int mode);
+int jffs2_get_compression_mode(void);
+int jffs2_set_compression_mode_name(const char *mode_name);
+
+int jffs2_enable_compressor_name(const char *name);
+int jffs2_disable_compressor_name(const char *name);
+
+int jffs2_set_compressor_priority(const char *name, int priority);
+
+struct jffs2_compressor {
+        struct list_head list;
+        int priority;             /* used by prirority comr. mode */
+        char *name;
+        char compr;               /* JFFS2_COMPR_XXX */
+        int (*compress)(unsigned char *data_in, unsigned char *cpage_out,
+                        uint32_t *srclen, uint32_t *destlen, void *model);
+        int (*decompress)(unsigned char *cdata_in, unsigned char *data_out,
+                        uint32_t cdatalen, uint32_t datalen, void *model);
+        int usecount;
+        int disabled;             /* if seted the compressor won't compress */
+        unsigned char *compr_buf; /* used by size compr. mode */
+        uint32_t compr_buf_size;  /* used by size compr. mode */
+        uint32_t stat_compr_orig_size;
+        uint32_t stat_compr_new_size;
+        uint32_t stat_compr_blocks;
+        uint32_t stat_decompr_blocks;
+};
+
+int jffs2_register_compressor(struct jffs2_compressor *comp);
+int jffs2_unregister_compressor(struct jffs2_compressor *comp);
+
+int jffs2_compressors_init(void);
+int jffs2_compressors_exit(void);
+
+uint16_t jffs2_compress(unsigned char *data_in, unsigned char **cpage_out,
+                             uint32_t *datalen, uint32_t *cdatalen);
+
+/* If it is setted, a decompress will be called after every compress */
+void jffs2_compression_check_set(int yesno);
+int jffs2_compression_check_get(void);
+int jffs2_compression_check_errorcnt_get(void);
+
+char *jffs2_list_compressors(void);
+char *jffs2_stats(void);
+
+/* Compressor modules */
+
+/* These functions will be called by jffs2_compressors_init/exit */
+#ifdef CONFIG_JFFS2_ZLIB
+int jffs2_zlib_init(void);
+void jffs2_zlib_exit(void);
+#endif
+#ifdef CONFIG_JFFS2_RTIME
+int jffs2_rtime_init(void);
+void jffs2_rtime_exit(void);
+#endif
+
+#endif /* __JFFS2_COMPR_H__ */
-- 
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