debug_output.h

#ifndef DEBUG_OUTPUT_H
#define DEBUG_OUTPUT_H

#include <stdarg.h>
#include <stdio.h>
#include <assert.h>

int debug_printf(const char* fmt, ...);
int debug_puts(const char* str);
int debug_fputs(const char* restrict str, FILE* restrict stream);
int debug_putc(int ch, FILE* stream);
int debug_fputc(int ch, FILE* stream);

#ifdef DO_DEBUG
 int debug_printf(const char* fmt, ...)
 {
     va_list arg;
     va_start(arg, fmt);
     int result = vprintf(fmt, arg);
     va_end(arg);
     return result;
 }
 int debug_puts(const char* str)
 {
     return puts(str);
 }
 int debug_fputs(const char* restrict str, FILE* restrict stream)
 {
     return fputs(str, stream);
 }
 int debug_putc(int ch, FILE* stream)
 {
     return putc(ch, stream);
 }
 int debug_fputc(int ch, FILE* stream)
 {
     return fputc(ch, stream);
 }
 #define debug_assert(x) assert(x)

 #define DEBUG_PRINTF debug_printf
 #define DEBUG_PUTS debug_puts
 #define DEBUG_FPUTS debug_fputs
 #define DEBUG_PUTC debug_putc
 #define DEBUG_FPUTC debug_fputc
 #define DEBUG_ASSERT assert

#else // DO_DEBUG

 int debug_printf(const char* fmt, ...)
 {
     return 0;
 }
 int debug_puts(const char* str)
 {
     return 0;
 }
 int debug_fputs(const char* restrict str, FILE* restrict stream)
 {
     return 0;
 }
 int debug_putc(int ch, FILE* stream)
 {
     return ch;
 }
 int debug_fputc(int ch, FILE* stream)
 {
     return ch;
 }
 #define debug_assert(x) do {(x);} while (0)

 #define DEBUG_PRINTF(...) do {} while (0)
 #define DEBUG_PUTS(...) do {} while (0)
 #define DEBUG_FPUTS(...) do {} while (0)
 #define DEBUG_PUTC(...) do {} while (0)
 #define DEBUG_FPUTC(...) do {} while (0)
 #define DEBUG_ASSERT(...) do {} while (0)

#endif // DO_DEBUG

#endif // DEBUG_OUTPUT_H