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 1.26 2010/01/23 21:14:36 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 *Generic_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 Generic_This_Type(void *arg)
  57 {
  58   thisARG *argp = (thisARG *) 0;
  59
  60   if (arg)
  61     {
  62       argp = typeMalloc(thisARG, 1);
  63
  64       if (argp)
  65         {
  66           T((T_CREATE("thisARG %p"), (void *)argp));
  67           argp->width = *((int *)arg);
  68         }
  69     }
  70   return ((void *)argp);
  71 }
  72
  73 /*---------------------------------------------------------------------------
  74 |   Facility      :  libnform
  75 |   Function      :  static void *Make_This_Type(va_list *ap)
  76 |
  77 |   Description   :  Allocate structure for alpha type argument.
  78 |
  79 |   Return Values :  Pointer to argument structure or NULL on error
  80 +--------------------------------------------------------------------------*/
  81 static void *
  82 Make_This_Type(va_list *ap)
  83 {
  84   int w = va_arg(*ap, int);
  85
  86   return Generic_This_Type((void *)&w);
  87 }
  88
  89 /*---------------------------------------------------------------------------
  90 |   Facility      :  libnform
  91 |   Function      :  static void *Copy_This_Type(const void * argp)
  92 |
  93 |   Description   :  Copy structure for alpha type argument.
  94 |
  95 |   Return Values :  Pointer to argument structure or NULL on error.
  96 +--------------------------------------------------------------------------*/
  97 static void *
  98 Copy_This_Type(const void *argp)
  99 {
 100   const thisARG *ap = (const thisARG *)argp;
 101   thisARG *result = typeMalloc(thisARG, 1);
 102
 103   if (result)
 104     {
 105       T((T_CREATE("thisARG %p"), (void *)result));
 106       *result = *ap;
 107     }
 108
 109   return ((void *)result);
 110 }
 111
 112 /*---------------------------------------------------------------------------
 113 |   Facility      :  libnform
 114 |   Function      :  static void Free_This_Type(void *argp)
 115 |
 116 |   Description   :  Free structure for alpha type argument.
 117 |
 118 |   Return Values :  -
 119 +--------------------------------------------------------------------------*/
 120 static void
 121 Free_This_Type(void *argp)
 122 {
 123   if (argp)
 124     free(argp);
 125 }
 126
 127 /*---------------------------------------------------------------------------
 128 |   Facility      :  libnform
 129 |   Function      :  static bool Check_This_Character(
 130 |                                      int c,
 131 |                                      const void *argp)
 132 |
 133 |   Description   :  Check a character for the alpha type.
 134 |
 135 |   Return Values :  TRUE  - character is valid
 136 |                    FALSE - character is invalid
 137 +--------------------------------------------------------------------------*/
 138 static bool
 139 Check_This_Character(int c, const void *argp GCC_UNUSED)
 140 {
 141 #if USE_WIDEC_SUPPORT
 142   if (iswalpha((wint_t) c))
 143     return TRUE;
 144 #endif
 145   return (isalpha(UChar(c)) ? TRUE : FALSE);
 146 }
 147
 148 /*---------------------------------------------------------------------------
 149 |   Facility      :  libnform
 150 |   Function      :  static bool Check_This_Field(
 151 |                                      FIELD *field,
 152 |                                      const void *argp)
 153 |
 154 |   Description   :  Validate buffer content to be a valid alpha value
 155 |
 156 |   Return Values :  TRUE  - field is valid
 157 |                    FALSE - field is invalid
 158 +--------------------------------------------------------------------------*/
 159 static bool
 160 Check_This_Field(FIELD *field, const void *argp)
 161 {
 162   int width = ((const thisARG *)argp)->width;
 163   unsigned char *bp = (unsigned char *)field_buffer(field, 0);
 164   bool result = (width < 0);
 165
 166   Check_CTYPE_Field(result, bp, width, Check_This_Character);
 167   return (result);
 168 }
 169
 170 static FIELDTYPE typeTHIS =
 171 {
 172   _HAS_ARGS | _RESIDENT,
 173   1,                            /* this is mutable, so we can't be const */
 174   (FIELDTYPE *)0,
 175   (FIELDTYPE *)0,
 176   Make_This_Type,
 177   Copy_This_Type,
 178   Free_This_Type,
 179   INIT_FT_FUNC(Check_This_Field),
 180   INIT_FT_FUNC(Check_This_Character),
 181   INIT_FT_FUNC(NULL),
 182   INIT_FT_FUNC(NULL),
 183 #if NCURSES_INTEROP_FUNCS
 184   Generic_This_Type
 185 #endif
 186 };
 187
 188 NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_ALPHA = &typeTHIS;
 189
 190 #if NCURSES_INTEROP_FUNCS
 191 /* The next routines are to simplify the use of ncurses from
 192    programming languages with restictions on interop with C level
 193    constructs (e.g. variable access or va_list + ellipsis constructs)
 194 */
 195 NCURSES_EXPORT(FIELDTYPE *)
 196 _nc_TYPE_ALPHA(void)
 197 {
 198   return TYPE_ALPHA;
 199 }
 200 #endif
 201
 202 /* fty_alpha.c ends here */