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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 1.26 2015/01/10 17:10:25 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 #if HAVE_REGEX_H_FUNCS | HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
96 # define MAYBE_UNUSED GCC_UNUSED
99 /*---------------------------------------------------------------------------
100 | Facility : libnform
101 | Function : static void *Generic_RegularExpression_Type(void * arg)
103 | Description : Allocate structure for regex type argument.
105 | Return Values : Pointer to argument structure or NULL on error
106 +--------------------------------------------------------------------------*/
108 Generic_RegularExpression_Type(void *arg MAYBE_UNUSED)
110 #if HAVE_REGEX_H_FUNCS
111 char *rx = (char *)arg;
112 RegExp_Arg *preg = (RegExp_Arg *)0;
116 preg = typeCalloc(RegExp_Arg, 1);
120 T((T_CREATE("RegExp_Arg %p"), (void *)preg));
121 if (((preg->pRegExp = typeMalloc(regex_t, 1)) != 0)
122 && !regcomp(preg->pRegExp, rx,
123 (REG_EXTENDED | REG_NOSUB | REG_NEWLINE)))
125 T((T_CREATE("regex_t %p"), (void *)preg->pRegExp));
126 if ((preg->refCount = typeMalloc(unsigned long, 1)) != 0)
127 *(preg->refCount) = 1;
134 preg = (RegExp_Arg *)0;
138 return ((void *)preg);
139 #elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
140 char *rx = (char *)arg;
141 RegExp_Arg *pArg = (RegExp_Arg *)0;
145 pArg = typeMalloc(RegExp_Arg, 1);
149 int blen = RX_INCREMENT;
151 T((T_CREATE("RegExp_Arg %p"), pArg));
152 pArg->compiled_expression = NULL;
153 if ((pArg->refCount = typeMalloc(unsigned long, 1)) != 0)
154 *(pArg->refCount) = 1;
158 char *buf = typeMalloc(char, blen);
162 #if HAVE_REGEXP_H_FUNCS
163 char *last_pos = compile(rx, buf, &buf[blen], '\0');
165 #else /* HAVE_REGEXPR_H_FUNCS */
166 char *last_pos = compile(rx, buf, &buf[blen]);
172 blen += RX_INCREMENT;
182 pArg->compiled_expression = buf;
187 while (blen <= MAX_RX_LEN);
189 if (pArg && !pArg->compiled_expression)
201 /*---------------------------------------------------------------------------
202 | Facility : libnform
203 | Function : static void *Make_RegularExpression_Type(va_list * ap)
205 | Description : Allocate structure for regex type argument.
207 | Return Values : Pointer to argument structure or NULL on error
208 +--------------------------------------------------------------------------*/
210 Make_RegularExpression_Type(va_list *ap)
212 char *rx = va_arg(*ap, char *);
214 return Generic_RegularExpression_Type((void *)rx);
217 /*---------------------------------------------------------------------------
218 | Facility : libnform
219 | Function : static void *Copy_RegularExpression_Type(
222 | Description : Copy structure for regex type argument.
224 | Return Values : Pointer to argument structure or NULL on error.
225 +--------------------------------------------------------------------------*/
227 Copy_RegularExpression_Type(const void *argp MAYBE_UNUSED)
229 #if (HAVE_REGEX_H_FUNCS | HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS)
230 const RegExp_Arg *ap = (const RegExp_Arg *)argp;
231 const RegExp_Arg *result = (const RegExp_Arg *)0;
235 *(ap->refCount) += 1;
238 return (void *)result;
244 /*---------------------------------------------------------------------------
245 | Facility : libnform
246 | Function : static void Free_RegularExpression_Type(void * argp)
248 | Description : Free structure for regex type argument.
251 +--------------------------------------------------------------------------*/
253 Free_RegularExpression_Type(void *argp MAYBE_UNUSED)
255 #if HAVE_REGEX_H_FUNCS | HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
256 RegExp_Arg *ap = (RegExp_Arg *)argp;
260 if (--(*(ap->refCount)) == 0)
262 #if HAVE_REGEX_H_FUNCS
266 regfree(ap->pRegExp);
269 #elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
270 if (ap->compiled_expression)
273 free(ap->compiled_expression);
282 /*---------------------------------------------------------------------------
283 | Facility : libnform
284 | Function : static bool Check_RegularExpression_Field(
288 | Description : Validate buffer content to be a valid regular expression
290 | Return Values : TRUE - field is valid
291 | FALSE - field is invalid
292 +--------------------------------------------------------------------------*/
294 Check_RegularExpression_Field(FIELD *field MAYBE_UNUSED,
295 const void *argp MAYBE_UNUSED)
299 #if HAVE_REGEX_H_FUNCS
300 const RegExp_Arg *ap = (const RegExp_Arg *)argp;
302 if (ap && ap->pRegExp)
303 match = (regexec(ap->pRegExp, field_buffer(field, 0), 0, NULL, 0)
306 #elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
307 RegExp_Arg *ap = (RegExp_Arg *)argp;
309 if (ap && ap->compiled_expression)
310 match = (step(field_buffer(field, 0), ap->compiled_expression)
317 static FIELDTYPE typeREGEXP =
319 _HAS_ARGS | _RESIDENT,
320 1, /* this is mutable, so we can't be const */
323 Make_RegularExpression_Type,
324 Copy_RegularExpression_Type,
325 Free_RegularExpression_Type,
326 INIT_FT_FUNC(Check_RegularExpression_Field),
330 #if NCURSES_INTEROP_FUNCS
331 Generic_RegularExpression_Type
335 NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_REGEXP = &typeREGEXP;
337 #if NCURSES_INTEROP_FUNCS
338 /* The next routines are to simplify the use of ncurses from
339 programming languages with restictions on interop with C level
340 constructs (e.g. variable access or va_list + ellipsis constructs)
342 NCURSES_EXPORT(FIELDTYPE *)
343 _nc_TYPE_REGEXP(void)
349 /* fty_regex.c ends here */