Convert time information to a string
#include <time.h> char* asctime( const struct tm* timeptr ); char* asctime_r( const struct tm* timeptr, char* buf );
- A pointer to a tm structure that contains the time that you want to convert to a string.
- (asctime_r() only) A buffer in which asctime_r() can store the resulting string. This buffer must be large enough to hold at least 26 characters.
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The asctime() and asctime_r() functions convert the time information in the structure pointed to by timeptr into a string containing exactly 26 characters, in the form:
Tue May 7 10:40:27 2002\n\0
The asctime() function places the result string in a static buffer that's reused every time you call asctime() or ctime(). Calling gmtime() or localtime() could also change the date in this static buffer.
The result string for asctime_r() is contained in the buffer pointed to by buf.
All fields have a constant width. The newline character ('\n') and a NUL character ('\0') occupy the last two positions of the string.
A pointer to the character string result, or NULL if an error occurred.
The asctime() and ctime() functions place their results in a static buffer that's reused for each call to asctime() or ctime().
Last modified: 2014-06-24