From d4081a383e28db26c65298f7405554d4312b1342 Mon Sep 17 00:00:00 2001 From: Pedro Alves Date: Tue, 8 Nov 2016 15:26:42 +0000 Subject: Introduce string_printf This introduces the string_printf function. Like asprintf, but returns a std::string. gdb/ChangeLog: 2016-11-08 Pedro Alves * Makefile.in (COMMON_OBS): Add utils-selftests.o. * common/common-utils.c (string_printf): New function. * common/common-utils.h: Include . (string_printf): Declare. * utils-selftests.c: New file. --- gdb/common/common-utils.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'gdb/common/common-utils.c') diff --git a/gdb/common/common-utils.c b/gdb/common/common-utils.c index 5a346ec..e112b62 100644 --- a/gdb/common/common-utils.c +++ b/gdb/common/common-utils.c @@ -150,6 +150,29 @@ xsnprintf (char *str, size_t size, const char *format, ...) return ret; } +/* See documentation in common-utils.h. */ + +std::string +string_printf (const char* fmt, ...) +{ + va_list vp; + int size; + + va_start (vp, fmt); + size = vsnprintf (NULL, 0, fmt, vp); + va_end (vp); + + std::string str (size, '\0'); + + /* C++11 and later guarantee std::string uses contiguous memory and + always includes the terminating '\0'. */ + va_start (vp, fmt); + vsprintf (&str[0], fmt, vp); + va_end (vp); + + return str; +} + char * savestring (const char *ptr, size_t len) { -- cgit v1.1