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git/argv-array.h
Jeff King c1189caeaf 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>
2011-09-14 11:56:36 -07:00

20 lines
463 B
C

#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 */