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Diffstat (limited to 'examples/common.h')
-rw-r--r-- | examples/common.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/examples/common.h b/examples/common.h new file mode 100644 index 000000000..5ffc9c8eb --- /dev/null +++ b/examples/common.h @@ -0,0 +1,80 @@ +/* + * Copyright (C) the libgit2 contributors. All rights reserved. + * + * This file is part of libgit2, distributed under the GNU GPL v2 with + * a Linking Exception. For full terms see the included COPYING file. + */ + +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <git2.h> + +/** + * Check libgit2 error code, printing error to stderr on failure and + * exiting the program. + */ +extern void check_lg2(int error, const char *message, const char *extra); + +/** + * Exit the program, printing error to stderr + */ +extern void fatal(const char *message, const char *extra); + +/** + * Check if a string has the given prefix. Returns 0 if not prefixed + * or the length of the prefix if it is. + */ +extern size_t is_prefixed(const char *str, const char *pfx); + +/** + * Match an integer string, returning 1 if matched, 0 if not. + */ +extern int is_integer(int *out, const char *str, int allow_negative); + +struct args_info { + int argc; + char **argv; + int pos; +}; +#define ARGS_INFO_INIT { argc, argv, 0 } + +/** + * Check current `args` entry against `opt` string. If it matches + * exactly, take the next arg as a string; if it matches as a prefix with + * an equal sign, take the remainder as a string; otherwise return 0. + */ +extern int match_str_arg( + const char **out, struct args_info *args, const char *opt); + +/** + * Check current `args` entry against `opt` string parsing as uint16. If + * `opt` matches exactly, take the next arg as a uint16_t value; if `opt` + * is a prefix (equal sign optional), take the remainder of the arg as a + * uint16_t value; otherwise return 0. + */ +extern int match_uint16_arg( + uint16_t *out, struct args_info *args, const char *opt); + +/** + * Check current `args` entry against `opt` string parsing as int. If + * `opt` matches exactly, take the next arg as an int value; if it matches + * as a prefix (equal sign optional), take the remainder of the arg as a + * int value; otherwise return 0. + */ +extern int match_int_arg( + int *out, struct args_info *args, const char *opt, int allow_negative); + +/** + * Basic output function for plain text diff output + * Pass `FILE*` such as `stdout` or `stderr` as payload (or NULL == `stdout`) + */ +extern int diff_output( + const git_diff_delta*, const git_diff_hunk*, const git_diff_line*, void*); + +/** + * Convert a treeish argument to an actual tree; this will call check_lg2 + * and exit the program if `treeish` cannot be resolved to a tree + */ +extern void treeish_to_tree( + git_tree **out, git_repository *repo, const char *treeish); |