1 files changed, 74 insertions, 0 deletions
diff --git a/mdk-stage1/insmod-modutils/util/gzfiles.c b/mdk-stage1/insmod-modutils/util/gzfiles.c
new file mode 100644
index 000000000..8d02253bb
--- /dev/null
+++ b/mdk-stage1/insmod-modutils/util/gzfiles.c
@@ -0,0 +1,74 @@
+/*
+ * This simple library intends to make it transparent to read gzipped and/or
+ * standard files. This is simple enough to fit modutils' needs, but may be
+ * easily adapted to anyone's needs. It's completely free, do what you want
+ * with it .  - Willy Tarreau <willy@meta-x.org> - 2000/05/05 -
+ */
+
+#ifdef CONFIG_USE_ZLIB
+
+#include <stdio.h>
+#include <zlib.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+/* redefinition of gz_stream which isn't exported by zlib */
+typedef struct gz_stream {
+    z_stream stream;
+    int      z_err;   /* error code for last stream operation */
+    int      z_eof;   /* set if end of input file */
+    FILE     *file;   /* .gz file */
+    Byte     *inbuf;  /* input buffer */
+    Byte     *outbuf; /* output buffer */
+    uLong    crc;     /* crc32 of uncompressed data */
+    char     *msg;    /* error message */
+    char     *path;   /* path name for debugging only */
+    int      transparent; /* 1 if input file is not a .gz file */
+    char     mode;    /* 'w' or 'r' */
+    long     startpos; /* start of compressed data in file (header skipped) */
+} gz_stream;
+
+/* maximum number of simultaneous open files, also greater file descriptor number */
+#define MAXFD	64
+
+/* this static list is assumed to be filled with NULLs at runtime */
+static gzFile gzf_fds[MAXFD];
+
+/* returns the filedesc of the opened file. */
+int gzf_open(const char *name, int mode) {
+    int fd;
+    gzFile g;
+
+    if ((g=gzopen(name, "rb")) != NULL) {
+	fd=fileno(((gz_stream*)g)->file);
+	gzf_fds[fd]=g;
+    }
+    else if ((fd=open(name, mode)) != -1) {
+	gzf_fds[fd]=NULL; /* NULL means not GZ mode */
+    }
+    return fd;
+}
+
+off_t gzf_lseek(int fd, off_t offset, int whence) {
+    if (fd<0 || fd>=MAXFD || gzf_fds[fd]==NULL)
+	return lseek(fd, offset, whence);
+    else
+	return gzseek(gzf_fds[fd], offset, whence);
+}
+
+int gzf_read(int fd, void *buf, size_t count) {
+    if (fd<0 || fd>=MAXFD || gzf_fds[fd]==NULL)
+	return read(fd, buf, count);
+    else
+	return gzread(gzf_fds[fd], buf, count);
+}
+
+void gzf_close(int fd) {
+    if (fd<0 || fd>=MAXFD || gzf_fds[fd]==NULL)
+	close(fd);
+    else
+	gzclose(gzf_fds[fd]);
+}
+#endif
+