dbg.h

/** @file dbg.h
 *  @brief Modified "Zed's Awesome Debug Macros".
 *
 *  Originally from:
 *  http://c.learncodethehardway.org/book/ex20.html
 *
 *  @author Zed (http://c.learncodethehardway.org/book/ex20.html)
 *  @author Luke
 */

#ifndef __dbg_h__
#define __dbg_h__

#include <stdio.h>
#include <errno.h>
#include <string.h>

#define clean_errno() (errno == 0 ? "None" : strerror(errno))

#ifdef __WIN32
#include <windows.h>

struct DBG {
    int error;
    HANDLE h_console;
    CONSOLE_SCREEN_BUFFER_INFO console_info;
    WORD saved_attributes;
};

#define DBG_INIT()  g_dbg.error = 0;\
                    g_dbg.h_console = GetStdHandle(STD_OUTPUT_HANDLE);\
                    GetConsoleScreenBufferInfo(g_dbg.h_console, &g_dbg.console_info);\
                    g_dbg.saved_attributes = g_dbg.console_info.wAttributes


#define DBG_COLOR_DEBUG_WIN32 GetConsoleScreenBufferInfo(g_dbg.h_console, &g_dbg.console_info);\
                              g_dbg.saved_attributes = g_dbg.console_info.wAttributes;\
                              SetConsoleTextAttribute(g_dbg.h_console, g_dbg.saved_attributes);

#define DBG_COLOR_ERR_WIN32 GetConsoleScreenBufferInfo(g_dbg.h_console, &g_dbg.console_info);\
                            g_dbg.saved_attributes = g_dbg.console_info.wAttributes;\
                            SetConsoleTextAttribute(g_dbg.h_console,\
                                FOREGROUND_INTENSITY | FOREGROUND_RED);

#define DBG_COLOR_WARN_WIN32 GetConsoleScreenBufferInfo(g_dbg.h_console, &g_dbg.console_info);\
                             g_dbg.saved_attributes = g_dbg.console_info.wAttributes;\
                             SetConsoleTextAttribute(g_dbg.h_console,\
                                FOREGROUND_INTENSITY | FOREGROUND_RED | FOREGROUND_GREEN);

#define DBG_COLOR_INFO_WIN32 GetConsoleScreenBufferInfo(g_dbg.h_console, &g_dbg.console_info);\
                             g_dbg.saved_attributes = g_dbg.console_info.wAttributes;\
                             SetConsoleTextAttribute(g_dbg.h_console,\
                                FOREGROUND_INTENSITY | FOREGROUND_GREEN | FOREGROUND_BLUE);

#define DBG_COLOR_RESET_WIN32 SetConsoleTextAttribute(g_dbg.h_console, g_dbg.saved_attributes)

#define DBG_COLOR_DEBUG
#define DBG_COLOR_ERR
#define DBG_COLOR_WARN
#define DBG_COLOR_INFO
#define DBG_COLOR_RESET

#else


/**
 * @struct DBG
 * @brief Struct to store debug/logging vars.
 */
struct DBG {
    int error;
};

#define DBG_INIT() g_dbg.error = 0;

#define DBG_COLOR_DEBUG "\x1B[35m"
#define DBG_COLOR_ERR "\x1B[31m"
#define DBG_COLOR_WARN "\x1B[33m"
#define DBG_COLOR_INFO "\x1B[34m"
#define DBG_COLOR_RESET "\033[0m"

#define DBG_COLOR_DEBUG_WIN32
#define DBG_COLOR_ERR_WIN32
#define DBG_COLOR_WARN_WIN32
#define DBG_COLOR_INFO_WIN32
#define DBG_COLOR_RESET_WIN32

#endif /* __WIN32 */

extern struct DBG g_dbg;


#ifdef NDEBUG
#define debug(M, ...)
#else
#define debug(M, ...) DBG_COLOR_DEBUG_WIN32;\
                      fprintf(stderr, DBG_COLOR_DEBUG "DEBUG %s:%d: " M "\n"\
                              DBG_COLOR_RESET, __FILE__, __LINE__, ##__VA_ARGS__);\
                      DBG_COLOR_RESET_WIN32
#endif


#define log_err(M, ...) DBG_COLOR_ERR_WIN32;\
                        g_dbg.error = 1;\
                        fprintf(stderr, DBG_COLOR_ERR "[ERROR] (%s:%d: errno: %s) " M "\n"\
                                DBG_COLOR_RESET, __FILE__, __LINE__, clean_errno(), ##__VA_ARGS__);\
                        DBG_COLOR_RESET_WIN32

#define log_warn(M, ...) DBG_COLOR_WARN_WIN32;\
                         fprintf(stderr, DBG_COLOR_WARN "[WARN] (%s:%d: errno: %s) " M "\n"\
                                 DBG_COLOR_RESET, __FILE__, __LINE__, clean_errno(), ##__VA_ARGS__);\
                         DBG_COLOR_RESET_WIN32

#define log_info(M, ...) DBG_COLOR_INFO_WIN32;\
                         fprintf(stderr, DBG_COLOR_INFO "[INFO] (%s:%d) " M "\n"\
                                 DBG_COLOR_RESET, __FILE__, __LINE__, ##__VA_ARGS__);\
                         DBG_COLOR_RESET_WIN32

#define check(A, M, ...) if( !(A) ) {\
                            log_err(M, ##__VA_ARGS__);\
                            errno=0;\
                            goto error;\
                         }

#define sentinel(M, ...)  { log_err(M, ##__VA_ARGS__);\
                            errno=0;\
                            goto error; }

#define check_mem(A) check((A), "Out of memory.")

#define check_debug(A, M, ...) if( !(A) ) {\
                                   debug(M, ##__VA_ARGS__);\
                                   errno=0;\
                                   goto error;\
                               }

#endif /* __dbg_h__ */