int parse_format_specifier (struct fmt_spec *input, enum fmt_parse_flags);
int parse_format_specifier_name (const char **cp, enum fmt_parse_flags);
int check_input_specifier (const struct fmt_spec *spec, int emit_error);
int check_output_specifier (const struct fmt_spec *spec, int emit_error);
int parse_format_specifier (struct fmt_spec *input, enum fmt_parse_flags);
int parse_format_specifier_name (const char **cp, enum fmt_parse_flags);
int check_input_specifier (const struct fmt_spec *spec, int emit_error);
int check_output_specifier (const struct fmt_spec *spec, int emit_error);