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Add debugging constructs

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This commit is contained in:
Théophile Bastian 2020-06-04 11:46:35 +02:00
parent a27e894fc1
commit c88ee2d6e9
2 changed files with 55 additions and 0 deletions
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14
util.cpp
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@ -1,8 +1,22 @@
#include <cstdio>
#include <string.h>
#include <stdarg.h>
#include "util.hpp"
int debug;
void do_debugf(int level, const char *format, ...)
{
va_list args;
va_start(args, format);
if(debug >= level) {
vfprintf(stderr, format, args);
fflush(stderr);
}
va_end(args);
}
MsgException::MsgException(const std::string& msg, int code, bool is_perror)
: _msg(msg), _code(code)
{

41
util.hpp
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@ -3,6 +3,47 @@
#include <exception>
#include <string>
/* Debugging -- taken from babeld */
extern int debug;
#if defined(__GNUC__) && (__GNUC__ >= 3)
#define ATTRIBUTE(x) __attribute__ (x)
#define LIKELY(_x) __builtin_expect(!!(_x), 1)
#define UNLIKELY(_x) __builtin_expect(!!(_x), 0)
#else
#define ATTRIBUTE(x) /**/
#define LIKELY(_x) !!(_x)
#define UNLIKELY(_x) !!(_x)
#endif
#if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
#define debugf(...) \
do { \
if(UNLIKELY(debug >= 2)) do_debugf(2, __VA_ARGS__); \
} while(0)
#define kdebugf(...) \
do { \
if(UNLIKELY(debug >= 3)) do_debugf(3, __VA_ARGS__); \
} while(0)
#elif defined __GNUC__
#define debugf(_args...) \
do { \
if(UNLIKELY(debug >= 2)) do_debugf(2, _args); \
} while(0)
#define kdebugf(_args...) \
do { \
if(UNLIKELY(debug >= 3)) do_debugf(3, _args); \
} while(0)
#else
static inline void debugf(const char *format, ...) { return; }
static inline void kdebugf(const char *format, ...) { return; }
#endif
void do_debugf(int level, const char *format, ...);
/** MsgException -- an exception bearing a passed explanation message
*
* If `is_perror` is true, then the `strerror` corresponding message is appened