diff options
| -rw-r--r-- | common/stringop.c | 33 | ||||
| -rw-r--r-- | include/stringop.h | 9 |
2 files changed, 42 insertions, 0 deletions
diff --git a/common/stringop.c b/common/stringop.c index 7fb3fe12..c503143a 100644 --- a/common/stringop.c +++ b/common/stringop.c @@ -1,5 +1,6 @@ #define _POSIX_C_SOURCE 200809L #include <ctype.h> +#include <stdarg.h> #include <stdbool.h> #include <stdio.h> #include <stdlib.h> @@ -328,3 +329,35 @@ bool expand_path(char **path) { wordfree(&p); return true; } + +char *vformat_str(const char *fmt, va_list args) { + char *str = NULL; + va_list args_copy; + va_copy(args_copy, args); + + int len = vsnprintf(NULL, 0, fmt, args); + if (len < 0) { + sway_log_errno(SWAY_ERROR, "vsnprintf(\"%s\") failed", fmt); + goto out; + } + + str = malloc(len + 1); + if (str == NULL) { + sway_log_errno(SWAY_ERROR, "malloc() failed"); + goto out; + } + + vsnprintf(str, len + 1, fmt, args_copy); + +out: + va_end(args_copy); + return str; +} + +char *format_str(const char *fmt, ...) { + va_list args; + va_start(args, fmt); + char *str = vformat_str(fmt, args); + va_end(args); + return str; +} diff --git a/include/stringop.h b/include/stringop.h index b29f59b2..19a50f23 100644 --- a/include/stringop.h +++ b/include/stringop.h @@ -5,6 +5,12 @@ #include <stddef.h> #include "list.h" +#ifdef __GNUC__ +#define _SWAY_ATTRIB_PRINTF(start, end) __attribute__((format(printf, start, end))) +#else +#define _SWAY_ATTRIB_PRINTF(start, end) +#endif + void strip_whitespace(char *str); void strip_quotes(char *str); @@ -31,4 +37,7 @@ char *argsep(char **stringp, const char *delim, char *matched_delim); // Expand a path using shell replacements such as $HOME and ~ bool expand_path(char **path); +char *vformat_str(const char *fmt, va_list args) _SWAY_ATTRIB_PRINTF(1, 0); +char *format_str(const char *fmt, ...) _SWAY_ATTRIB_PRINTF(1, 2); + #endif |