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2 * Copyright (c) 1998-2004,2006 Free Software Foundation, Inc. *
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5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
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9 * copies of the Software, and to permit persons to whom the Software is *
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27 ****************************************************************************/
29 /***************************************************************************
31 * Author : Juergen Pfeifer *
33 ***************************************************************************/
35 #include "form.priv.h"
37 MODULE_ID("$Id: fty_regex.c,v 1.19 2006/04/22 21:33:05 tom Exp $")
39 #if HAVE_REGEX_H_FUNCS /* We prefer POSIX regex */
45 unsigned long *refCount;
49 #elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
54 RegEx_Init(char *instring)
67 #define INIT register char *sp = RegEx_Init(instring);
68 #define GETC() (*sp++)
70 #define UNGETC(c) (--sp)
71 #define RETURN(c) return(c)
72 #define ERROR(c) return RegEx_Error(c)
74 #if HAVE_REGEXP_H_FUNCS
82 char *compiled_expression;
83 unsigned long *refCount;
87 /* Maximum Length we allow for a compiled regular expression */
88 #define MAX_RX_LEN (2048)
89 #define RX_INCREMENT (256)
93 /*---------------------------------------------------------------------------
95 | Function : static void *Make_RegularExpression_Type(va_list * ap)
97 | Description : Allocate structure for regex type argument.
99 | Return Values : Pointer to argument structure or NULL on error
100 +--------------------------------------------------------------------------*/
102 Make_RegularExpression_Type(va_list *ap)
104 #if HAVE_REGEX_H_FUNCS
105 char *rx = va_arg(*ap, char *);
108 preg = (RegExp_Arg *)malloc(sizeof(RegExp_Arg));
112 if (((preg->pRegExp = (regex_t *) malloc(sizeof(regex_t))) != 0)
113 && !regcomp(preg->pRegExp, rx,
114 (REG_EXTENDED | REG_NOSUB | REG_NEWLINE)))
116 preg->refCount = (unsigned long *)malloc(sizeof(unsigned long));
118 *(preg->refCount) = 1;
125 preg = (RegExp_Arg *)0;
128 return ((void *)preg);
129 #elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
130 char *rx = va_arg(*ap, char *);
133 pArg = (RegExp_Arg *)malloc(sizeof(RegExp_Arg));
137 int blen = RX_INCREMENT;
139 pArg->compiled_expression = NULL;
140 pArg->refCount = (unsigned long *)malloc(sizeof(unsigned long));
142 *(pArg->refCount) = 1;
146 char *buf = (char *)malloc(blen);
150 #if HAVE_REGEXP_H_FUNCS
151 char *last_pos = compile(rx, buf, &buf[blen], '\0');
153 #else /* HAVE_REGEXPR_H_FUNCS */
154 char *last_pos = compile(rx, buf, &buf[blen]);
160 blen += RX_INCREMENT;
170 pArg->compiled_expression = buf;
175 while (blen <= MAX_RX_LEN);
177 if (pArg && !pArg->compiled_expression)
188 /*---------------------------------------------------------------------------
189 | Facility : libnform
190 | Function : static void *Copy_RegularExpression_Type(
193 | Description : Copy structure for regex type argument.
195 | Return Values : Pointer to argument structure or NULL on error.
196 +--------------------------------------------------------------------------*/
198 Copy_RegularExpression_Type(const void *argp)
200 #if (HAVE_REGEX_H_FUNCS | HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS)
201 const RegExp_Arg *ap = (const RegExp_Arg *)argp;
202 const RegExp_Arg *result = (const RegExp_Arg *)0;
206 *(ap->refCount) += 1;
209 return (void *)result;
215 /*---------------------------------------------------------------------------
216 | Facility : libnform
217 | Function : static void Free_RegularExpression_Type(void * argp)
219 | Description : Free structure for regex type argument.
222 +--------------------------------------------------------------------------*/
224 Free_RegularExpression_Type(void *argp)
226 #if HAVE_REGEX_H_FUNCS | HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
227 RegExp_Arg *ap = (RegExp_Arg *)argp;
231 if (--(*(ap->refCount)) == 0)
233 #if HAVE_REGEX_H_FUNCS
237 regfree(ap->pRegExp);
239 #elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
240 if (ap->compiled_expression)
243 free(ap->compiled_expression);
252 /*---------------------------------------------------------------------------
253 | Facility : libnform
254 | Function : static bool Check_RegularExpression_Field(
258 | Description : Validate buffer content to be a valid regular expression
260 | Return Values : TRUE - field is valid
261 | FALSE - field is invalid
262 +--------------------------------------------------------------------------*/
264 Check_RegularExpression_Field(FIELD *field, const void *argp)
268 #if HAVE_REGEX_H_FUNCS
269 const RegExp_Arg *ap = (const RegExp_Arg *)argp;
271 if (ap && ap->pRegExp)
272 match = (regexec(ap->pRegExp, field_buffer(field, 0), 0, NULL, 0)
275 #elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
276 RegExp_Arg *ap = (RegExp_Arg *)argp;
278 if (ap && ap->compiled_expression)
279 match = (step(field_buffer(field, 0), ap->compiled_expression)
286 static FIELDTYPE typeREGEXP =
288 _HAS_ARGS | _RESIDENT,
289 1, /* this is mutable, so we can't be const */
292 Make_RegularExpression_Type,
293 Copy_RegularExpression_Type,
294 Free_RegularExpression_Type,
295 Check_RegularExpression_Field,
301 NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_REGEXP = &typeREGEXP;
303 /* fty_regex.c ends here */