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authorJeff King <peff@peff.net>2011-09-13 17:57:57 -0400
committerJunio C Hamano <gitster@pobox.com>2011-09-14 11:56:36 -0700
commitc1189caeaf726e6c16c8bca7da8bf0b243da478d (patch)
tree8d8feeeef2e8584c11875da8dde2d04f334cb56b /argv-array.h
parent7878b07c0d86d05fa505f2464557c69addcc2c05 (diff)
downloadgit-c1189caeaf726e6c16c8bca7da8bf0b243da478d.tar.gz
git-c1189caeaf726e6c16c8bca7da8bf0b243da478d.tar.xz
refactor argv_array into generic code
The submodule code recently grew generic code to build a dynamic argv array. Many other parts of the code can reuse this, too, so let's make it generically available. There are two enhancements not found in the original code: 1. We now handle the NULL-termination invariant properly, even when no strings have been pushed (before, you could have an empty, NULL argv). This was not a problem for the submodule code, which always pushed at least one argument, but was not sufficiently safe for generic code. 2. There is a formatted variant of the "push" function. This is a convenience function which was not needed by the submodule code, but will make it easier to port other users to the new code. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'argv-array.h')
-rw-r--r--argv-array.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/argv-array.h b/argv-array.h
new file mode 100644
index 000000000..74dd2b1bc
--- /dev/null
+++ b/argv-array.h
@@ -0,0 +1,20 @@
+#ifndef ARGV_ARRAY_H
+#define ARGV_ARRAY_H
+
+extern const char **empty_argv;
+
+struct argv_array {
+ const char **argv;
+ int argc;
+ int alloc;
+};
+
+#define ARGV_ARRAY_INIT { empty_argv, 0, 0 }
+
+void argv_array_init(struct argv_array *);
+void argv_array_push(struct argv_array *, const char *);
+__attribute__((format (printf,2,3)))
+void argv_array_pushf(struct argv_array *, const char *fmt, ...);
+void argv_array_clear(struct argv_array *);
+
+#endif /* ARGV_ARRAY_H */