Merge pull request #34 from farrrb/inject-config-file

Added the possibility to inject a config file.

printf.c

@@ -32,29 +32,47 @@
 
 #include <stdbool.h>
 #include <stdint.h>
+
 #include "printf.h"
 
+// define this globally (e.g. gcc -DPRINTF_INCLUDE_CONFIG_H ...) to include the
+// printf_config.h header file
+#ifdef PRINTF_INCLUDE_CONFIG_H
+  #include "printf_config.h"
+#endif
 
-// ntoa conversion buffer size, this must be big enough to hold
-// one converted numeric number including padded zeros (dynamically created on stack)
-// 32 byte is a good default
+// 'ntoa' conversion buffer size, this must be big enough to hold one converted
+// numeric number including padded zeros (dynamically created on stack)
+// default: 32 byte
+#ifndef PRINTF_NTOA_BUFFER_SIZE
   #define PRINTF_NTOA_BUFFER_SIZE    32U
+#endif
 
-// ftoa conversion buffer size, this must be big enough to hold
-// one converted float number including padded zeros (dynamically created on stack)
-// 32 byte is a good default
+// 'ftoa' conversion buffer size, this must be big enough to hold one converted
+// float number including padded zeros (dynamically created on stack)
+// default: 32 byte
+#ifndef PRINTF_FTOA_BUFFER_SIZE
   #define PRINTF_FTOA_BUFFER_SIZE    32U
+#endif
 
-// define this to support floating point (%f)
+// support for the floating point type (%f)
+// default: activated
+#ifndef PRINTF_DISABLE_SUPPORT_FLOAT
   #define PRINTF_SUPPORT_FLOAT
+#endif
 
-// define this to support long long types (%llu or %p)
+// support for the long long types (%llu or %p)
+// default: activated
+#ifndef PRINTF_DISABLE_SUPPORT_LONG_LONG
   #define PRINTF_SUPPORT_LONG_LONG
+#endif
 
-// define this to support the ptrdiff_t type (%t)
+// support for the ptrdiff_t type (%t)
 // ptrdiff_t is normally defined in <stddef.h> as long or long long type
+// default: activated
+#ifndef PRINTF_DISABLE_SUPPORT_PTRDIFF_T
   #define PRINTF_SUPPORT_PTRDIFF_T
-
+#endif
 
 ///////////////////////////////////////////////////////////////////////////////