autogenerate zip_err_str from zip.h

--HG--
branch : HEAD

lib/Makefile.am

diff --git a/lib/Makefile.am b/lib/Makefile.am
index 0d9ec57..55a6e03 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -6,3 +6,7 @@
 	zip_fopen.c zip_fopen_index.c zip_fclose.c zip_fread.c \
 	zf_new_free.c
 
+BUILT_SOURCES=zip_err_str.c
+
+zip_err_str.c: zip.h
+	make_zip_err_str.sh zip.h zip_err_str.c
\ No newline at end of file

lib/make_zip_err_str.sh

diff --git a/lib/make_zip_err_str.sh b/lib/make_zip_err_str.sh
new file mode 100755
index 0000000..98cf429
--- /dev/null
+++ b/lib/make_zip_err_str.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+
+if [ "$#" -ne 2 ]
+then
+    echo Usage: $0 in_file out_file >&2
+    echo        e.g. $0 zip.h zip_err_str.c >&2
+    exit 1
+fi
+
+if [ "$1" = "$2" ]
+then
+    echo $0: error: output file = input file >&2
+    exit 1
+fi
+
+echo "/* This file was autogenerated by $0 from $1" > "$2.$$"
+echo "   -- don't change here */" >> "$2.$$"
+echo '#include "zip.h"' >> "$2.$$"
+echo 'char *zip_err_str[] = {' >> "$2.$$"
+sed -n  '/^#define ZERR_/ s/.*\/\* \([^*]*\) \*\//    "\1",/p' "$1" >> "$2.$$"
+echo '}' >> "$2.$$"
+
+mv "$2.$$" "$2"