c_programming

C_programming

a good c tips Programming Guide

a Debug Trick for helping debug program

#ifdef DEBUG

#define dump(fp, x...) debug_print(fp, __FILE__, __LINE__, __FUNCTION__, ##x);

#else

#define dump(fp, x...)

#endif

void debug_print(FILE * fp, const char * filename, const int line, const char * funcname, char *fmt, ...)

{

char buf[1024];

time_t t;

struct tm * now;

va_list ap;

time(&t);

now = localtime(&t);

va_start(ap, fmt);

fprintf(fp, "%04d-%02d-%02d %02d:%02d:%02d -- %s(%d):%s DEBUG:@\"", now -> tm_year + 1900, now -> tm_mon + 1, now -> tm_mday, now -> tm_hour, now -> tm_min, now -> tm_sec, filename, line, funcname);

vsprintf(buf, fmt, ap);

fprintf(fp, "%s\"@\n", buf);

va_end(ap);

}