newlib/libc/machine/powerpc/atosfix16.c

   1 /*
   2 FUNCTION
   3    <<atosfix16>>, <<atosfix32>>, <<atosfix64>>---string to signed fixed-point
   4
   5 INDEX
   6         atosfix16
   7 INDEX
   8         atosfix32
   9 INDEX
  10         atosfix64
  11 INDEX
  12         _atosfix16_r
  13 INDEX
  14         _atosfix32_r
  15 INDEX
  16         _atosfix64_r
  17
  18 SYNOPSIS
  19         #include <stdlib.h>
  20         __int16_t atosfix16(const char *<[s]>);
  21         __int32_t atosfix32(const char *<[s]>);
  22         __int64_t atosfix32(const char *<[s]>);
  23
  24         __int16_t _atosfix16_r(struct __reent *, const char *<[s]>);
  25         __int32_t _atosfix32_r(struct __reent *, const char *<[s]>);
  26         __int64_t _atosfix32_r(struct __reent *, const char *<[s]>);
  27
  28 DESCRIPTION
  29         <<atosfix16>> converts the initial portion of a string to a sign
  30         + 15-bit fraction fixed point value.
  31         <<atosfix32>> converts the initial portion of a string to a sign
  32         + 31-bit fraction fixed point value.
  33         <<atosfix64>> converts the initial portion of a string to a sign
  34         + 63-bit fraction fixed point value.
  35         <<atosfix16(s)>> is implemented as <<strtosfix16(s, NULL).>>
  36         <<atosfix32(s)>> is implemented as <<strtosfix32(s, NULL).>>
  37         <<atosfix64(s)>> is implemented as <<strtosfix64(s, NULL).>>
  38
  39         The alternate functions <<_atosfix16_r>>, <<_atosfix32_r>>,
  40         and <<_atosfix64_r>> are reentrant versions.
  41         The extra argument <[reent]> is a pointer to a reentrancy structure.
  42
  43 RETURNS
  44         The functions return the converted value, if any. If no conversion was
  45         made, <<0>> is returned.  If saturation occurs, <<ERANGE>> is stored
  46         in errno.
  47
  48 PORTABILITY
  49         <<atosfix16>>, <<atosfix32>>, and <<atosfix64>> are non-standard.
  50
  51         No supporting OS subroutines are directly required.  The
  52         OS subroutines required by <<strtod>> are used.
  53 */
  54
  55 /*
  56  * Jeff Johnston - 02/13/2002
  57  */
  58
  59 #ifdef __SPE__
  60
  61 #include <stdlib.h>
  62 #include <_ansi.h>
  63
  64 __int16_t
  65 _atosfix16_r (struct _reent *reent,
  66         const char *s)
  67 {
  68   return _strtosfix16_r (reent, s, NULL);
  69 }
  70
  71 #ifndef _REENT_ONLY
  72 __int16_t
  73 atosfix16 (const char *s)
  74 {
  75   return strtosfix16 (s, NULL);
  76 }
  77
  78 #endif /* !_REENT_ONLY */
  79
  80 #endif /* __SPE__ */