fty_alnum.c revision 166124 
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28
29/***************************************************************************
30*                                                                          *
31*  Author : Juergen Pfeifer                                                *
32*                                                                          *
33***************************************************************************/
34
35#include "form.priv.h"
36
37MODULE_ID("$Id: fty_alnum.c,v 1.19 2006/04/22 21:33:05 tom Exp $")
38
39#define thisARG alnumARG
40
41typedef struct
42  {
43    int width;
44  }
45thisARG;
46
47/*---------------------------------------------------------------------------
48|   Facility      :  libnform
49|   Function      :  static void *Make_This_Type(va_list *ap)
50|
51|   Description   :  Allocate structure for alphanumeric type argument.
52|
53|   Return Values :  Pointer to argument structure or NULL on error
54+--------------------------------------------------------------------------*/
55static void *
56Make_This_Type(va_list *ap)
57{
58  thisARG *argp = (thisARG *) malloc(sizeof(thisARG));
59
60  if (argp)
61    argp->width = va_arg(*ap, int);
62
63  return ((void *)argp);
64}
65
66/*---------------------------------------------------------------------------
67|   Facility      :  libnform
68|   Function      :  static void *Copy_ThisType(const void *argp)
69|
70|   Description   :  Copy structure for alphanumeric type argument.
71|
72|   Return Values :  Pointer to argument structure or NULL on error.
73+--------------------------------------------------------------------------*/
74static void *
75Copy_This_Type(const void *argp)
76{
77  const thisARG *ap = (const thisARG *)argp;
78  thisARG *result = (thisARG *) malloc(sizeof(thisARG));
79
80  if (result)
81    *result = *ap;
82
83  return ((void *)result);
84}
85
86/*---------------------------------------------------------------------------
87|   Facility      :  libnform
88|   Function      :  static void Free_This_Type(void *argp)
89|
90|   Description   :  Free structure for alphanumeric type argument.
91|
92|   Return Values :  -
93+--------------------------------------------------------------------------*/
94static void
95Free_This_Type(void *argp)
96{
97  if (argp)
98    free(argp);
99}
100
101/*---------------------------------------------------------------------------
102|   Facility      :  libnform
103|   Function      :  static bool Check_This_Character(
104|                                      int c,
105|                                      const void *argp)
106|
107|   Description   :  Check a character for the alphanumeric type.
108|
109|   Return Values :  TRUE  - character is valid
110|                    FALSE - character is invalid
111+--------------------------------------------------------------------------*/
112static bool
113Check_This_Character(int c, const void *argp GCC_UNUSED)
114{
115#if USE_WIDEC_SUPPORT
116  if (iswalnum((wint_t) c))
117    return TRUE;
118#endif
119  return (isalnum(UChar(c)) ? TRUE : FALSE);
120}
121
122/*---------------------------------------------------------------------------
123|   Facility      :  libnform
124|   Function      :  static bool Check_This_Field(
125|                                      FIELD *field,
126|                                      const void *argp)
127|
128|   Description   :  Validate buffer content to be a valid alphanumeric value
129|
130|   Return Values :  TRUE  - field is valid
131|                    FALSE - field is invalid
132+--------------------------------------------------------------------------*/
133static bool
134Check_This_Field(FIELD *field, const void *argp)
135{
136  int width = ((const thisARG *)argp)->width;
137  unsigned char *bp = (unsigned char *)field_buffer(field, 0);
138  bool result = (width < 0);
139
140  Check_CTYPE_Field(result, bp, width, Check_This_Character);
141  return (result);
142}
143
144static FIELDTYPE typeTHIS =
145{
146  _HAS_ARGS | _RESIDENT,
147  1,				/* this is mutable, so we can't be const */
148  (FIELDTYPE *)0,
149  (FIELDTYPE *)0,
150  Make_This_Type,
151  Copy_This_Type,
152  Free_This_Type,
153  Check_This_Field,
154  Check_This_Character,
155  NULL,
156  NULL
157};
158
159NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_ALNUM = &typeTHIS;
160
161/* fty_alnum.c ends here */
162