contrib/ncurses/form/fty_alpha.c

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  28
  29 /***************************************************************************
  30 *                                                                          *
  31 *  Author : Juergen Pfeifer                                                *
  32 *                                                                          *
  33 ***************************************************************************/
  34
  35 #include "form.priv.h"
  36
  37 MODULE_ID("$Id: fty_alpha.c,v 1.23 2007/10/13 19:32:09 tom Exp $")
  38
  39 #define thisARG alphaARG
  40
  41 typedef struct
  42   {
  43     int width;
  44   }
  45 thisARG;
  46
  47 /*---------------------------------------------------------------------------
  48 |   Facility      :  libnform
  49 |   Function      :  static void *Make_This_Type(va_list *ap)
  50 |
  51 |   Description   :  Allocate structure for alpha type argument.
  52 |
  53 |   Return Values :  Pointer to argument structure or NULL on error
  54 +--------------------------------------------------------------------------*/
  55 static void *
  56 Make_This_Type(va_list *ap)
  57 {
  58   thisARG *argp = typeMalloc(thisARG, 1);
  59
  60   if (argp)
  61     {
  62       T((T_CREATE("thisARG %p"), argp));
  63       argp->width = va_arg(*ap, int);
  64     }
  65
  66   return ((void *)argp);
  67 }
  68
  69 /*---------------------------------------------------------------------------
  70 |   Facility      :  libnform
  71 |   Function      :  static void *Copy_This_Type(const void * argp)
  72 |
  73 |   Description   :  Copy structure for alpha type argument.
  74 |
  75 |   Return Values :  Pointer to argument structure or NULL on error.
  76 +--------------------------------------------------------------------------*/
  77 static void *
  78 Copy_This_Type(const void *argp)
  79 {
  80   const thisARG *ap = (const thisARG *)argp;
  81   thisARG *result = typeMalloc(thisARG, 1);
  82
  83   if (result)
  84     {
  85       T((T_CREATE("thisARG %p"), result));
  86       *result = *ap;
  87     }
  88
  89   return ((void *)result);
  90 }
  91
  92 /*---------------------------------------------------------------------------
  93 |   Facility      :  libnform
  94 |   Function      :  static void Free_This_Type(void *argp)
  95 |
  96 |   Description   :  Free structure for alpha type argument.
  97 |
  98 |   Return Values :  -
  99 +--------------------------------------------------------------------------*/
 100 static void
 101 Free_This_Type(void *argp)
 102 {
 103   if (argp)
 104     free(argp);
 105 }
 106
 107 /*---------------------------------------------------------------------------
 108 |   Facility      :  libnform
 109 |   Function      :  static bool Check_This_Character(
 110 |                                      int c,
 111 |                                      const void *argp)
 112 |
 113 |   Description   :  Check a character for the alpha type.
 114 |
 115 |   Return Values :  TRUE  - character is valid
 116 |                    FALSE - character is invalid
 117 +--------------------------------------------------------------------------*/
 118 static bool
 119 Check_This_Character(int c, const void *argp GCC_UNUSED)
 120 {
 121 #if USE_WIDEC_SUPPORT
 122   if (iswalpha((wint_t) c))
 123     return TRUE;
 124 #endif
 125   return (isalpha(UChar(c)) ? TRUE : FALSE);
 126 }
 127
 128 /*---------------------------------------------------------------------------
 129 |   Facility      :  libnform
 130 |   Function      :  static bool Check_This_Field(
 131 |                                      FIELD *field,
 132 |                                      const void *argp)
 133 |
 134 |   Description   :  Validate buffer content to be a valid alpha value
 135 |
 136 |   Return Values :  TRUE  - field is valid
 137 |                    FALSE - field is invalid
 138 +--------------------------------------------------------------------------*/
 139 static bool
 140 Check_This_Field(FIELD *field, const void *argp)
 141 {
 142   int width = ((const thisARG *)argp)->width;
 143   unsigned char *bp = (unsigned char *)field_buffer(field, 0);
 144   bool result = (width < 0);
 145
 146   Check_CTYPE_Field(result, bp, width, Check_This_Character);
 147   return (result);
 148 }
 149
 150 static FIELDTYPE typeTHIS =
 151 {
 152   _HAS_ARGS | _RESIDENT,
 153   1,                            /* this is mutable, so we can't be const */
 154   (FIELDTYPE *)0,
 155   (FIELDTYPE *)0,
 156   Make_This_Type,
 157   Copy_This_Type,
 158   Free_This_Type,
 159   Check_This_Field,
 160   Check_This_Character,
 161   NULL,
 162   NULL
 163 };
 164
 165 NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_ALPHA = &typeTHIS;
 166
 167 /* fty_alpha.c ends here */