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Fixed crash issue in RawSerial::printf for uARM 

Fixed crash issue in RawSerial::printf() function for microlib platforms
since microlib doesn't fully support C99 functions such as vsnprintf().
pull/463/head
Toyomasa Watarai 2014-08-25 16:13:43 +09:00
parent bbc120c478
commit d05b7f51d8
1 changed files with 8 additions and 0 deletions
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8
libraries/mbed/common/RawSerial.cpp
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@ -47,6 +47,13 @@ int RawSerial::puts(const char *str) {
int RawSerial::printf(const char *format, ...) {
std::va_list arg;
va_start(arg, format);
#if defined(__MICROLIB) && defined(__ARMCC_VERSION) // with microlib and ARM compiler
char *temp;
temp = (char*)alloca(STRING_STACK_LIMIT);
vsprintf(temp, format, arg);
puts(temp);
int len = strlen(temp);
#else
int len = vsnprintf(NULL, 0, format, arg);
if (len < STRING_STACK_LIMIT) {
char temp[STRING_STACK_LIMIT];
@ -58,6 +65,7 @@ int RawSerial::printf(const char *format, ...) {
puts(temp);
delete[] temp;
}
#endif
va_end(arg);
return len;
}