minix: move globals and inline functions to minix_programs.h

[thirdparty/util-linux.git] / disk-utils / minix_programs.h

diff --git a/disk-utils/minix_programs.h b/disk-utils/minix_programs.h
new file mode 100644 (file)
index 0000000..3e6c649
--- /dev/null
+++ b/disk-utils/minix_programs.h
@@ -0,0 +1,113 @@
+#ifndef UTIL_LINUX_MINIX_PROGRAMS_H
+#define UTIL_LINUX_MINIX_PROGRAMS_H
+
+#include "minix.h"
+
+/*
+ * Global variables.
+ */
+static int fs_version = 1;     /* this default value needs to change in a near future */
+
+static char *super_block_buffer;
+static char *inode_buffer = NULL;
+
+static char *inode_map;
+static char *zone_map;
+
+/*
+ * Inline functions.
+ */
+static inline unsigned long get_ninodes(void)
+{
+       switch (fs_version) {
+       case 3:
+               return Super3.s_ninodes;
+       default:
+               return (unsigned long)Super.s_ninodes;
+       }
+}
+
+static inline unsigned long get_nzones(void)
+{
+       switch (fs_version) {
+       case 3:
+               return (unsigned long)Super3.s_zones;
+       case 2:
+               return (unsigned long)Super.s_zones;
+       default:
+               return (unsigned long)Super.s_nzones;
+       }
+}
+
+static inline unsigned long get_nimaps(void)
+{
+       switch (fs_version) {
+       case 3:
+               return (unsigned long)Super3.s_imap_blocks;
+       default:
+               return (unsigned long)Super.s_imap_blocks;
+       }
+}
+
+static inline unsigned long get_nzmaps(void)
+{
+       switch (fs_version) {
+       case 3:
+               return (unsigned long)Super3.s_zmap_blocks;
+       default:
+               return (unsigned long)Super.s_zmap_blocks;
+       }
+}
+
+static inline unsigned long get_first_zone(void)
+{
+       switch (fs_version) {
+       case 3:
+               return (unsigned long)Super3.s_firstdatazone;
+       default:
+               return (unsigned long)Super.s_firstdatazone;
+       }
+}
+
+static inline unsigned long get_zone_size(void)
+{
+       switch (fs_version) {
+       case 3:
+               return (unsigned long)Super3.s_log_zone_size;
+       default:
+               return (unsigned long)Super.s_log_zone_size;
+       }
+}
+
+static inline unsigned long get_max_size(void)
+{
+       switch (fs_version) {
+       case 3:
+               return (unsigned long)Super3.s_max_size;
+       default:
+               return (unsigned long)Super.s_max_size;
+       }
+}
+
+static unsigned long inode_blocks(void)
+{
+       switch (fs_version) {
+       case 3:
+       case 2:
+               return UPPER(get_ninodes(), MINIX2_INODES_PER_BLOCK);
+       default:
+               return UPPER(get_ninodes(), MINIX_INODES_PER_BLOCK);
+       }
+}
+
+static inline unsigned long first_zone_data(void)
+{
+       return 2 + get_nimaps() + get_nzmaps() + inode_blocks();
+}
+
+static inline unsigned long get_inode_buffer_size(void)
+{
+       return inode_blocks() * MINIX_BLOCK_SIZE;
+}
+
+#endif                         /* UTIL_LINUX_MINIX_PROGRAMS_H */