- Add libmysql to the tree

1 files changed, 97 insertions, 0 deletions

diff --git a/ext/mysql/libmysql/int2str.c b/ext/mysql/libmysql/int2str.c
new file mode 100644
index 0000000000..9d6d435721
--- /dev/null
+++ b/ext/mysql/libmysql/int2str.c
@@ -0,0 +1,97 @@
+/*
+  Defines: int2str(), itoa(), ltoa()
+
+  int2str(dst, radix, val)
+  converts the (long) integer "val" to character form and moves it to
+  the destination string "dst" followed by a terminating NUL.  The
+  result is normally a pointer to this NUL character, but if the radix
+  is dud the result will be NullS and nothing will be changed.
+
+  If radix is -2..-36, val is taken to be SIGNED.
+  If radix is  2.. 36, val is taken to be UNSIGNED.
+  That is, val is signed if and only if radix is.  You will normally
+  use radix -10 only through itoa and ltoa, for radix 2, 8, or 16
+  unsigned is what you generally want.
+
+  _dig_vec is public just in case someone has a use for it.
+  The definitions of itoa and ltoa are actually macros in m_string.h,
+  but this is where the code is.
+
+  Note: The standard itoa() returns a pointer to the argument, when int2str
+	returns the pointer to the end-null.
+	itoa assumes that 10 -base numbers are allways signed and other arn't.
+*/
+
+#include <global.h>
+#include "m_string.h"
+
+char NEAR _dig_vec[] =
+  "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+
+
+char *int2str(register long int val, register char *dst, register int radix)
+{
+  char buffer[65];
+  register char *p;
+
+  if (radix < 0) {
+    if (radix < -36 || radix > -2) return NullS;
+    if (val < 0) {
+      *dst++ = '-';
+      val = -val;
+    }
+    radix = -radix;
+  } else {
+    if (radix > 36 || radix < 2) return NullS;
+  }
+  /*  The slightly contorted code which follows is due to the
+      fact that few machines directly support unsigned long / and %.
+      Certainly the VAX C compiler generates a subroutine call.  In
+      the interests of efficiency (hollow laugh) I let this happen
+      for the first digit only; after that "val" will be in range so
+      that signed integer division will do.  Sorry 'bout that.
+      CHECK THE CODE PRODUCED BY YOUR C COMPILER.  The first % and /
+      should be unsigned, the second % and / signed, but C compilers
+      tend to be extraordinarily sensitive to minor details of style.
+      This works on a VAX, that's all I claim for it.
+      */
+  p = &buffer[sizeof(buffer)-1];
+  *p = '\0';
+  *--p = _dig_vec[(ulong) val % (ulong) radix];
+  val = (ulong) val / (ulong) radix;
+#ifdef HAVE_LDIV
+  while (val != 0)
+  {
+    ldiv_t res;
+    res=ldiv(val,radix);
+    *--p = _dig_vec[res.rem];
+    val= res.quot;
+  }
+#else
+  while (val != 0)
+  {
+    *--p = _dig_vec[val%radix];
+    val /= radix;
+  }
+#endif
+  while ((*dst++ = *p++) != 0) ;
+  return dst-1;
+}
+
+#ifdef USE_MY_ITOA
+
+	/* Change to less general itoa interface */
+
+char *my_itoa(int val, char *dst, int radix)
+{
+  VOID(int2str((long) val,dst,(radix == 10 ? -10 : radix)));
+  return dst;
+}
+
+char *my_ltoa(long int val, char *dst, int radix)
+{
+  VOID(int2str((long) val,dst,(radix == 10 ? -10 : radix)));
+  return dst;
+}
+
+#endif