Diff: itoas.cpp

Revision:

0:5ebc917ebd09

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/itoas.cpp	Thu Feb 05 07:24:30 2015 +0000
@@ -0,0 +1,88 @@
+#include "itoas.h"
+
+char* ltoa( long value, char *string, int radix )
+{
+  char tmp[33];
+  char *tp = tmp;
+  long i;
+  unsigned long v;
+  int sign;
+  char *sp;
+  if ( string == NULL )
+  {
+    return 0 ;
+  }
+  if (radix > 36 || radix <= 1)
+  {
+    return 0 ;
+  }
+  sign = (radix == 10 && value < 0);
+  if (sign)
+  {
+    v = -value;
+  }
+  else
+  {
+    v = (unsigned long)value;
+  }
+  while (v || tp == tmp)
+  {
+    i = v % radix;
+    v = v / radix;
+    if (i < 10)
+      *tp++ = i+'0';
+    else
+      *tp++ = i + 'a' - 10;
+  }
+  sp = string;
+  if (sign)
+    *sp++ = '-';
+  while (tp > tmp)
+    *sp++ = *--tp;
+  *sp = 0;
+  return string;
+}
+
+char* ultoa( unsigned long value, char *string, int radix )
+{
+  char tmp[33];
+  char *tp = tmp;
+  long i;
+  unsigned long v = value;
+  char *sp;
+  if ( string == NULL )
+  {
+    return 0;
+  }
+  if (radix > 36 || radix <= 1)
+  {
+    return 0;
+  }
+ 
+  while (v || tp == tmp)
+  {
+    i = v % radix;
+    v = v / radix;
+    if (i < 10)
+      *tp++ = i+'0';
+    else
+      *tp++ = i + 'a' - 10;
+  }
+  sp = string;
+ 
+  while (tp > tmp)
+    *sp++ = *--tp;
+  *sp = 0;
+  return string;
+}
+
+
+char* itoa( int value, char *string, int radix )
+{
+  return ltoa( value, string, radix ) ;
+}
+
+char* utoa( unsigned long value, char *string, int radix )
+{
+  return ultoa( value, string, radix ) ;
+}