util: add gz_readline

The idea is to provide a more or less drop in replacement for readline
to read from zlib/gzip streams.  Take the opportunity to replace
malloc with talloc.

1 files changed, 29 insertions, 0 deletions

diff --git a/util/util.h b/util/util.h
new file mode 100644
index 00000000..d12fadb4
--- /dev/null
+++ b/util/util.h
@@ -0,0 +1,29 @@
+#ifndef _UTIL_H
+#define _UTIL_H
+
+typedef enum util_status {
+    /**
+     * No error occurred.
+     */
+    UTIL_SUCCESS = 0,
+    /**
+     * Out of memory.
+     */
+    UTIL_OUT_OF_MEMORY,
+    /**
+     * End of stream reached while attempting to read.
+     */
+    UTIL_EOF,
+    /**
+     * Low level error occured, consult errno.
+     */
+    UTIL_ERRNO,
+    /**
+     * Zlib error occured, call gzerror for details.
+     */
+    UTIL_GZERROR
+} util_status_t;
+
+const char *
+util_error_string (util_status_t status);
+#endif