contrib: add "lar" - initial work on lua archive format

[project/luci.git] / contrib / lar / lar.h

diff --git a/contrib/lar/lar.h b/contrib/lar/lar.h
new file mode 100644 (file)
index 0000000..a4379f1
--- /dev/null
+++ b/contrib/lar/lar.h
@@ -0,0 +1,76 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <fcntl.h>
+#include <string.h>
+#include <arpa/inet.h>
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+
+
+int errno;
+
+#define LAR_DIE(s) \
+       do { \
+               fprintf(stderr, "%s(%i): %s(): %s\n", \
+                       __FILE__, __LINE__, __FUNCTION__, s); \
+               if( errno ) fprintf(stderr, "%s(%i): %s\n", \
+                       __FILE__, __LINE__, strerror(errno) ); \
+               exit(1); \
+       } while(0)
+
+
+#define LAR_FNAME_BUFFER 1024
+#define LAR_FNAME(s) char s[LAR_FNAME_BUFFER]
+
+
+struct lar_index_item {
+       uint32_t noffset;
+       uint32_t nlength;
+       uint32_t foffset;
+       uint32_t flength;
+       uint16_t type;
+       uint16_t flags;
+       struct lar_index_item *next;
+};
+
+struct lar_member_item {
+       uint16_t type;
+       uint16_t flags;
+       uint32_t length;
+       char *data;
+       char *mmap;
+       size_t mlen;
+};
+
+struct lar_archive_handle {
+       int fd;
+       off_t length;
+       char filename[LAR_FNAME_BUFFER];
+       struct lar_index_item *index;
+};
+
+typedef struct lar_index_item lar_index;
+typedef struct lar_member_item lar_member;
+typedef struct lar_archive_handle lar_archive;
+
+
+int lar_read32( int fd, uint32_t *val );
+int lar_read16( int fd, uint16_t *val );
+
+lar_index * lar_get_index( lar_archive *ar );
+
+uint32_t lar_get_filename( lar_archive *ar,
+       lar_index *idx_ptr, char *filename );
+
+lar_member * lar_open_member( lar_archive *ar, const char *name );
+
+int lar_close_member( lar_member *member );
+
+lar_archive * lar_open( const char *filename );
+
+int lar_close( lar_archive *ar );
+
+