Regards mpaland#116 : Defined a (hopefully) appropriate type and some…

… constants for numeric base variables; no functionality change.

printf.c

@@ -120,6 +120,12 @@
 #define FLAGS_POINTER   (1U << 12U)
   // Note: Similar, but not identical, effect as FLAGS_HASH
 
+#define BASE_BINARY    2
+#define BASE_OCTAL     8
+#define BASE_DECIMAL  10
+#define BASE_HEX      16
+
+typedef uint8_t numeric_base_t;
 
 // import float.h for DBL_MAX
 #if PRINTF_SUPPORT_FLOAT_SPECIFIERS
@@ -234,7 +240,7 @@ static size_t _out_rev(out_fct_type out, char* buffer, size_t idx, size_t maxlen
 
 
 // internal itoa format
-static size_t _ntoa_format(out_fct_type out, char* buffer, size_t idx, size_t maxlen, char* buf, size_t len, bool negative, unsigned int base, unsigned int precision, unsigned int width, unsigned int flags)
+static size_t _ntoa_format(out_fct_type out, char* buffer, size_t idx, size_t maxlen, char* buf, size_t len, bool negative, numeric_base_t base, unsigned int precision, unsigned int width, unsigned int flags)
 {
   size_t unpadded_len = len;
 
@@ -253,7 +259,7 @@ static size_t _ntoa_format(out_fct_type out, char* buffer, size_t idx, size_t ma
       buf[len++] = '0';
     }
 
-    if (base == 8U && (len > unpadded_len)) {
+    if (base == BASE_OCTAL && (len > unpadded_len)) {
       // Since we've written some zeros, we've satisfied the alternative format leading space requirement
       flags &= ~FLAGS_HASH;
     }
@@ -267,19 +273,19 @@ static size_t _ntoa_format(out_fct_type out, char* buffer, size_t idx, size_t ma
       if (unpadded_len < len) {
         len--;
       }
-      if (len && (base == 16U)) {
+      if (len && (base == BASE_HEX)) {
         if (unpadded_len < len) {
           len--;
         }
       }
     }
-    if ((base == 16U) && !(flags & FLAGS_UPPERCASE) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
+    if ((base == BASE_HEX) && !(flags & FLAGS_UPPERCASE) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
       buf[len++] = 'x';
     }
-    else if ((base == 16U) && (flags & FLAGS_UPPERCASE) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
+    else if ((base == BASE_HEX) && (flags & FLAGS_UPPERCASE) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
       buf[len++] = 'X';
     }
-    else if ((base == 2U) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
+    else if ((base == BASE_BINARY) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
       buf[len++] = 'b';
     }
     if (len < PRINTF_NTOA_BUFFER_SIZE) {
@@ -304,7 +310,7 @@ static size_t _ntoa_format(out_fct_type out, char* buffer, size_t idx, size_t ma
 
 
 // internal itoa
-static size_t _ntoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, NTOA_VALUE_TYPE value, bool negative, NTOA_VALUE_TYPE base, unsigned int precision, unsigned int width, unsigned int flags)
+static size_t _ntoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, NTOA_VALUE_TYPE value, bool negative, numeric_base_t base, unsigned int precision, unsigned int width, unsigned int flags)
 {
   char buf[PRINTF_NTOA_BUFFER_SIZE];
   size_t len = 0U;
@@ -317,7 +323,7 @@ static size_t _ntoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, N
         // don't differ on 0 values, or (in the case of octal) we've already provided the special
         // handling for this mode.
 	}
-	else if (base == 16U) {
+	else if (base == BASE_HEX) {
 	  flags &= ~FLAGS_HASH;
         // We drop this flag this since either the alternative and regular modes of the specifier
         // don't differ on 0 values
@@ -331,7 +337,7 @@ static size_t _ntoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, N
     } while (value && (len < PRINTF_NTOA_BUFFER_SIZE));
   }
 
-  return _ntoa_format(out, buffer, idx, maxlen, buf, len, negative, (unsigned int)base, precision, width, flags);
+  return _ntoa_format(out, buffer, idx, maxlen, buf, len, negative, base, precision, width, flags);
 }
 
 
@@ -721,18 +727,18 @@ static int _vsnprintf(out_fct_type out, char* buffer, const size_t maxlen, const
       case 'o' :
       case 'b' : {
         // set the base
-        unsigned int base;
+        numeric_base_t base;
         if (*format == 'x' || *format == 'X') {
-          base = 16U;
+          base = BASE_HEX;
         }
         else if (*format == 'o') {
-          base =  8U;
+          base =  BASE_OCTAL;
         }
         else if (*format == 'b') {
-          base =  2U;
+          base =  BASE_BINARY;
         }
         else {
-          base = 10U;
+          base = BASE_DECIMAL;
           flags &= ~FLAGS_HASH;   // no hash for dec format
         }
         // uppercase
@@ -868,11 +874,11 @@ static int _vsnprintf(out_fct_type out, char* buffer, const size_t maxlen, const
 #if PRINTF_SUPPORT_LONG_LONG
           const bool is_ll = sizeof(uintptr_t) == sizeof(long long);
           if (is_ll) {
-            idx = _ntoa(out, buffer, idx, maxlen, (NTOA_VALUE_TYPE) value, false, 16U, precision, width, flags);
+            idx = _ntoa(out, buffer, idx, maxlen, (NTOA_VALUE_TYPE) value, false, BASE_HEX, precision, width, flags);
           }
           else {
 #endif
-            idx = _ntoa(out, buffer, idx, maxlen, (NTOA_VALUE_TYPE)((uintptr_t)va_arg(va, void*)), false, 16U, precision, width, flags);
+            idx = _ntoa(out, buffer, idx, maxlen, (NTOA_VALUE_TYPE)((uintptr_t)va_arg(va, void*)), false, BASE_HEX, precision, width, flags);
 #if PRINTF_SUPPORT_LONG_LONG
           }
 #endif