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MySQL 5.1: mysql/src/5.1-dbg/libmysql/int2str.c File Reference

mysql/src/5.1-dbg/libmysql/int2str.c File Reference

#include <my_global.h>
#include "m_string.h"

Include dependency graph for int2str.c:


Functions
char *	int2str (register long int val, register char *dst, register int radix, int upcase)
char *	int10_to_str (long int val, char *dst, int radix)
Variables
char NEAR	_dig_vec_upper []
char NEAR	_dig_vec_lower []

Function Documentation

char* int10_to_str	(	long int	val,
		char *	dst,
		int	radix
	)

Definition at line 132 of file int2str.c.

References buffer, and p.

00133 {
00134   char buffer[65];
00135   register char *p;
00136   long int new_val;
00137 
00138   if (radix < 0)                                /* -10 */
00139   {
00140     if (val < 0)
00141     {
00142       *dst++ = '-';
00143       val = -val;
00144     }
00145   }
00146 
00147   p = &buffer[sizeof(buffer)-1];
00148   *p = '\0';
00149   new_val= (long) ((unsigned long int) val / 10);
00150   *--p = '0'+ (char) ((unsigned long int) val - (unsigned long) new_val * 10);
00151   val = new_val;
00152 
00153   while (val != 0)
00154   {
00155     new_val=val/10;
00156     *--p = '0' + (char) (val-new_val*10);
00157     val= new_val;
00158   }
00159   while ((*dst++ = *p++) != 0) ;
00160   return dst-1;
00161 }

char* int2str	(	register long int	val,
		register char *	dst,
		register int	radix,
		int	upcase
	)

Definition at line 54 of file int2str.c.

References _dig_vec_lower, _dig_vec_upper, buffer, NullS, and p.

00056 {
00057   char buffer[65];
00058   register char *p;
00059   long int new_val;
00060   char *dig_vec= upcase ? _dig_vec_upper : _dig_vec_lower;
00061 
00062   if (radix < 0)
00063   {
00064     if (radix < -36 || radix > -2)
00065       return NullS;
00066     if (val < 0)
00067     {
00068       *dst++ = '-';
00069       val = -val;
00070     }
00071     radix = -radix;
00072   }
00073   else if (radix > 36 || radix < 2)
00074     return NullS;
00075 
00076   /*
00077     The slightly contorted code which follows is due to the fact that
00078     few machines directly support unsigned long / and %.  Certainly
00079     the VAX C compiler generates a subroutine call.  In the interests
00080     of efficiency (hollow laugh) I let this happen for the first digit
00081     only; after that "val" will be in range so that signed integer
00082     division will do.  Sorry 'bout that.  CHECK THE CODE PRODUCED BY
00083     YOUR C COMPILER.  The first % and / should be unsigned, the second
00084     % and / signed, but C compilers tend to be extraordinarily
00085     sensitive to minor details of style.  This works on a VAX, that's
00086     all I claim for it.
00087   */
00088   p = &buffer[sizeof(buffer)-1];
00089   *p = '\0';
00090   new_val=(ulong) val / (ulong) radix;
00091   *--p = dig_vec[(uchar) ((ulong) val- (ulong) new_val*(ulong) radix)];
00092   val = new_val;
00093 #ifdef HAVE_LDIV
00094   while (val != 0)
00095   {
00096     ldiv_t res;
00097     res=ldiv(val,radix);
00098     *--p = dig_vec[res.rem];
00099     val= res.quot;
00100   }
00101 #else
00102   while (val != 0)
00103   {
00104     new_val=val/radix;
00105     *--p = dig_vec[(uchar) (val-new_val*radix)];
00106     val= new_val;
00107   }
00108 #endif
00109   while ((*dst++ = *p++) != 0) ;
00110   return dst-1;
00111 }

Variable Documentation

char NEAR _dig_vec_lower[]

Initial value:

  "0123456789abcdefghijklmnopqrstuvwxyz"

Definition at line 25 of file int2str.c.

char NEAR _dig_vec_upper[]

Initial value:

  "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"

Definition at line 23 of file int2str.c.

Generated on Sat Sep 9 01:55:46 2006 for MySQL 5.1 by

1.4.7

The world's most popular open source database

mysql/src/5.1-dbg/libmysql/int2str.c File Reference

Functions

Variables

Function Documentation

Variable Documentation