diff options
Diffstat (limited to 'src/runtime/c/gu/out.c')
| -rw-r--r-- | src/runtime/c/gu/out.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/runtime/c/gu/out.c b/src/runtime/c/gu/out.c index 6bde9cc58..d08b192dc 100644 --- a/src/runtime/c/gu/out.c +++ b/src/runtime/c/gu/out.c @@ -1,7 +1,7 @@ #include <gu/seq.h> #include <gu/out.h> #include <gu/utf8.h> -#include <gu/str.h> +#include <stdio.h> static bool gu_out_is_buffering(GuOut* out) @@ -261,7 +261,15 @@ void gu_vprintf(const char* fmt, va_list args, GuOut* out, GuExn* err) { GuPool* tmp_pool = gu_local_pool(); - char* str = gu_vasprintf(fmt, args, tmp_pool); + + va_list args2; + va_copy(args2, args); + int len = vsnprintf(NULL, 0, fmt, args2); + gu_assert_msg(len >= 0, "Invalid format string: \"%s\"", fmt); + va_end(args2); + char* str = gu_new_n(char, len + 1, tmp_pool); + vsnprintf(str, len + 1, fmt, args); + gu_out_bytes(out, (const uint8_t*) str, strlen(str), err); gu_pool_free(tmp_pool); } |