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, 24 insertions, 0 deletions

diff --git a/util/util.c b/util/util.c
new file mode 100644
index 00000000..06659b35
--- /dev/null
+++ b/util/util.c
@@ -0,0 +1,24 @@
+#include "util.h"
+#include "error_util.h"
+#include <string.h>
+#include <errno.h>
+
+const char *
+util_error_string (util_status_t errnum)
+{
+    switch (errnum) {
+    case UTIL_SUCCESS:
+	return "success";
+    case UTIL_OUT_OF_MEMORY:
+	return "out of memory";
+    case UTIL_EOF:
+	return "end of file";
+    case UTIL_ERRNO:
+	return strerror (errno);
+    case UTIL_GZERROR:
+	/* we lack context to be more informative here */
+	return "zlib error";
+    default:
+	INTERNAL_ERROR("unexpected error status %d", errnum);
+    }
+}