payloads/libpayload/curses/form/fty_int.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_int.c,v 1.25 2010/01/23 21:14:36 tom Exp $")
  38
  39 #if USE_WIDEC_SUPPORT
  40 #define isDigit(c) (iswdigit((wint_t)(c)) || isdigit(UChar(c)))
  41 #else
  42 #define isDigit(c) isdigit(UChar(c))
  43 #endif
  44
  45 #define thisARG integerARG
  46
  47 typedef struct
  48   {
  49     int precision;
  50     long low;
  51     long high;
  52   }
  53 thisARG;
  54
  55 typedef struct
  56   {
  57     int precision;
  58     long low;
  59     long high;
  60   }
  61 integerPARM;
  62
  63 /*---------------------------------------------------------------------------
  64 |   Facility      :  libnform
  65 |   Function      :  static void *Generic_This_Type( void * arg )
  66 |
  67 |   Description   :  Allocate structure for integer type argument.
  68 |
  69 |   Return Values :  Pointer to argument structure or NULL on error
  70 +--------------------------------------------------------------------------*/
  71 static void *
  72 Generic_This_Type(void *arg)
  73 {
  74   thisARG *argp = (thisARG *) 0;
  75   thisARG *param = (thisARG *) arg;
  76
  77   if (param)
  78     {
  79       argp = typeMalloc(thisARG, 1);
  80
  81       if (argp)
  82         {
  83           T((T_CREATE("thisARG %p"), (void *)argp));
  84           *argp = *param;
  85         }
  86     }
  87   return (void *)argp;
  88 }
  89
  90 /*---------------------------------------------------------------------------
  91 |   Facility      :  libnform
  92 |   Function      :  static void *Make_This_Type( va_list * ap )
  93 |
  94 |   Description   :  Allocate structure for integer type argument.
  95 |
  96 |   Return Values :  Pointer to argument structure or NULL on error
  97 +--------------------------------------------------------------------------*/
  98 static void *
  99 Make_This_Type(va_list *ap)
 100 {
 101   thisARG arg;
 102
 103   arg.precision = va_arg(*ap, int);
 104   arg.low = va_arg(*ap, long);
 105   arg.high = va_arg(*ap, long);
 106
 107   return Generic_This_Type((void *)&arg);
 108 }
 109
 110 /*---------------------------------------------------------------------------
 111 |   Facility      :  libnform
 112 |   Function      :  static void *Copy_This_Type(const void * argp)
 113 |
 114 |   Description   :  Copy structure for integer type argument.
 115 |
 116 |   Return Values :  Pointer to argument structure or NULL on error.
 117 +--------------------------------------------------------------------------*/
 118 static void *
 119 Copy_This_Type(const void *argp)
 120 {
 121   const thisARG *ap = (const thisARG *)argp;
 122   thisARG *result = (thisARG *) 0;
 123
 124   if (argp)
 125     {
 126       result = typeMalloc(thisARG, 1);
 127       if (result)
 128         {
 129           T((T_CREATE("thisARG %p"), (void *)result));
 130           *result = *ap;
 131         }
 132     }
 133   return (void *)result;
 134 }
 135
 136 /*---------------------------------------------------------------------------
 137 |   Facility      :  libnform
 138 |   Function      :  static void Free_This_Type(void * argp)
 139 |
 140 |   Description   :  Free structure for integer type argument.
 141 |
 142 |   Return Values :  -
 143 +--------------------------------------------------------------------------*/
 144 static void
 145 Free_This_Type(void *argp)
 146 {
 147   if (argp)
 148     free(argp);
 149 }
 150
 151 /*---------------------------------------------------------------------------
 152 |   Facility      :  libnform
 153 |   Function      :  static bool Check_This_Field(
 154 |                                                 FIELD * field,
 155 |                                                 const void * argp)
 156 |
 157 |   Description   :  Validate buffer content to be a valid integer value
 158 |
 159 |   Return Values :  TRUE  - field is valid
 160 |                    FALSE - field is invalid
 161 +--------------------------------------------------------------------------*/
 162 static bool
 163 Check_This_Field(FIELD *field, const void *argp)
 164 {
 165   const thisARG *argi = (const thisARG *)argp;
 166   long low = argi->low;
 167   long high = argi->high;
 168   int prec = argi->precision;
 169   unsigned char *bp = (unsigned char *)field_buffer(field, 0);
 170   char *s = (char *)bp;
 171   long val;
 172   char buf[100];
 173   bool result = FALSE;
 174
 175   while (*bp && *bp == ' ')
 176     bp++;
 177   if (*bp)
 178     {
 179       if (*bp == '-')
 180         bp++;
 181 #if USE_WIDEC_SUPPORT
 182       if (*bp)
 183         {
 184           bool blank = FALSE;
 185           int len;
 186           int n;
 187           wchar_t *list = _nc_Widen_String((char *)bp, &len);
 188
 189           if (list != 0)
 190             {
 191               result = TRUE;
 192               for (n = 0; n < len; ++n)
 193                 {
 194                   if (blank)
 195                     {
 196                       if (list[n] != ' ')
 197                         {
 198                           result = FALSE;
 199                           break;
 200                         }
 201                     }
 202                   else if (list[n] == ' ')
 203                     {
 204                       blank = TRUE;
 205                     }
 206                   else if (!isDigit(list[n]))
 207                     {
 208                       result = FALSE;
 209                       break;
 210                     }
 211                 }
 212               free(list);
 213             }
 214         }
 215 #else
 216       while (*bp)
 217         {
 218           if (!isdigit(UChar(*bp)))
 219             break;
 220           bp++;
 221         }
 222       while (*bp && *bp == ' ')
 223         bp++;
 224       result = (*bp == '\0');
 225 #endif
 226       if (result)
 227         {
 228           val = atol(s);
 229           if (low < high)
 230             {
 231               if (val < low || val > high)
 232                 result = FALSE;
 233             }
 234           if (result)
 235             {
 236               sprintf(buf, "%.*ld", (prec > 0 ? prec : 0), val);
 237               set_field_buffer(field, 0, buf);
 238             }
 239         }
 240     }
 241   return (result);
 242 }
 243
 244 /*---------------------------------------------------------------------------
 245 |   Facility      :  libnform
 246 |   Function      :  static bool Check_This_Character(
 247 |                                      int c,
 248 |                                      const void * argp)
 249 |
 250 |   Description   :  Check a character for the integer type.
 251 |
 252 |   Return Values :  TRUE  - character is valid
 253 |                    FALSE - character is invalid
 254 +--------------------------------------------------------------------------*/
 255 static bool
 256 Check_This_Character(int c, const void *argp GCC_UNUSED)
 257 {
 258   return ((isDigit(UChar(c)) || (c == '-')) ? TRUE : FALSE);
 259 }
 260
 261 static FIELDTYPE typeTHIS =
 262 {
 263   _HAS_ARGS | _RESIDENT,
 264   1,                            /* this is mutable, so we can't be const */
 265   (FIELDTYPE *)0,
 266   (FIELDTYPE *)0,
 267   Make_This_Type,
 268   Copy_This_Type,
 269   Free_This_Type,
 270   INIT_FT_FUNC(Check_This_Field),
 271   INIT_FT_FUNC(Check_This_Character),
 272   INIT_FT_FUNC(NULL),
 273   INIT_FT_FUNC(NULL),
 274 #if NCURSES_INTEROP_FUNCS
 275   Generic_This_Type
 276 #endif
 277 };
 278
 279 NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_INTEGER = &typeTHIS;
 280
 281 #if NCURSES_INTEROP_FUNCS
 282 /* The next routines are to simplify the use of ncurses from
 283    programming languages with restictions on interop with C level
 284    constructs (e.g. variable access or va_list + ellipsis constructs)
 285 */
 286 NCURSES_EXPORT(FIELDTYPE *)
 287 _nc_TYPE_INTEGER(void)
 288 {
 289   return TYPE_INTEGER;
 290 }
 291 #endif
 292
 293 /* fty_int.c ends here */