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-rw-r--r--form/fty_regex.c306
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diff --git a/form/fty_regex.c b/form/fty_regex.c
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+/****************************************************************************
+ * Copyright (c) 1998-2006,2007 Free Software Foundation, Inc. *
+ * *
+ * Permission is hereby granted, free of charge, to any person obtaining a *
+ * copy of this software and associated documentation files (the *
+ * "Software"), to deal in the Software without restriction, including *
+ * without limitation the rights to use, copy, modify, merge, publish, *
+ * distribute, distribute with modifications, sublicense, and/or sell *
+ * copies of the Software, and to permit persons to whom the Software is *
+ * furnished to do so, subject to the following conditions: *
+ * *
+ * The above copyright notice and this permission notice shall be included *
+ * in all copies or substantial portions of the Software. *
+ * *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
+ * *
+ * Except as contained in this notice, the name(s) of the above copyright *
+ * holders shall not be used in advertising or otherwise to promote the *
+ * sale, use or other dealings in this Software without prior written *
+ * authorization. *
+ ****************************************************************************/
+
+/***************************************************************************
+* *
+* Author : Juergen Pfeifer *
+* *
+***************************************************************************/
+
+#include "form.priv.h"
+
+MODULE_ID("$Id: fty_regex.c,v 1.21 2007/10/13 19:33:50 tom Exp $")
+
+#if HAVE_REGEX_H_FUNCS /* We prefer POSIX regex */
+#include <regex.h>
+
+typedef struct
+ {
+ regex_t *pRegExp;
+ unsigned long *refCount;
+ }
+RegExp_Arg;
+
+#elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
+#undef RETURN
+static int reg_errno;
+
+static char *
+RegEx_Init(char *instring)
+{
+ reg_errno = 0;
+ return instring;
+}
+
+static char *
+RegEx_Error(int code)
+{
+ reg_errno = code;
+ return 0;
+}
+
+#define INIT register char *sp = RegEx_Init(instring);
+#define GETC() (*sp++)
+#define PEEKC() (*sp)
+#define UNGETC(c) (--sp)
+#define RETURN(c) return(c)
+#define ERROR(c) return RegEx_Error(c)
+
+#if HAVE_REGEXP_H_FUNCS
+#include <regexp.h>
+#else
+#include <regexpr.h>
+#endif
+
+typedef struct
+{
+ char *compiled_expression;
+ unsigned long *refCount;
+}
+RegExp_Arg;
+
+/* Maximum Length we allow for a compiled regular expression */
+#define MAX_RX_LEN (2048)
+#define RX_INCREMENT (256)
+
+#endif
+
+/*---------------------------------------------------------------------------
+| Facility : libnform
+| Function : static void *Make_RegularExpression_Type(va_list * ap)
+|
+| Description : Allocate structure for regex type argument.
+|
+| Return Values : Pointer to argument structure or NULL on error
++--------------------------------------------------------------------------*/
+static void *
+Make_RegularExpression_Type(va_list *ap)
+{
+#if HAVE_REGEX_H_FUNCS
+ char *rx = va_arg(*ap, char *);
+ RegExp_Arg *preg;
+
+ preg = typeMalloc(RegExp_Arg, 1);
+
+ if (preg)
+ {
+ T((T_CREATE("RegExp_Arg %p"), preg));
+ if (((preg->pRegExp = typeMalloc(regex_t, 1)) != 0)
+ && !regcomp(preg->pRegExp, rx,
+ (REG_EXTENDED | REG_NOSUB | REG_NEWLINE)))
+ {
+ T((T_CREATE("regex_t %p"), preg->pRegExp));
+ preg->refCount = typeMalloc(unsigned long, 1);
+
+ *(preg->refCount) = 1;
+ }
+ else
+ {
+ if (preg->pRegExp)
+ free(preg->pRegExp);
+ free(preg);
+ preg = (RegExp_Arg *)0;
+ }
+ }
+ return ((void *)preg);
+#elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
+ char *rx = va_arg(*ap, char *);
+ RegExp_Arg *pArg;
+
+ pArg = typeMalloc(RegExp_Arg, 1);
+
+ if (pArg)
+ {
+ int blen = RX_INCREMENT;
+
+ T((T_CREATE("RegExp_Arg %p"), pArg));
+ pArg->compiled_expression = NULL;
+ pArg->refCount = typeMalloc(unsigned long, 1);
+
+ *(pArg->refCount) = 1;
+
+ do
+ {
+ char *buf = typeMalloc(char, blen);
+
+ if (buf)
+ {
+#if HAVE_REGEXP_H_FUNCS
+ char *last_pos = compile(rx, buf, &buf[blen], '\0');
+
+#else /* HAVE_REGEXPR_H_FUNCS */
+ char *last_pos = compile(rx, buf, &buf[blen]);
+#endif
+ if (reg_errno)
+ {
+ free(buf);
+ if (reg_errno == 50)
+ blen += RX_INCREMENT;
+ else
+ {
+ free(pArg);
+ pArg = NULL;
+ break;
+ }
+ }
+ else
+ {
+ pArg->compiled_expression = buf;
+ break;
+ }
+ }
+ }
+ while (blen <= MAX_RX_LEN);
+ }
+ if (pArg && !pArg->compiled_expression)
+ {
+ free(pArg);
+ pArg = NULL;
+ }
+ return (void *)pArg;
+#else
+ return 0;
+#endif
+}
+
+/*---------------------------------------------------------------------------
+| Facility : libnform
+| Function : static void *Copy_RegularExpression_Type(
+| const void * argp)
+|
+| Description : Copy structure for regex type argument.
+|
+| Return Values : Pointer to argument structure or NULL on error.
++--------------------------------------------------------------------------*/
+static void *
+Copy_RegularExpression_Type(const void *argp)
+{
+#if (HAVE_REGEX_H_FUNCS | HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS)
+ const RegExp_Arg *ap = (const RegExp_Arg *)argp;
+ const RegExp_Arg *result = (const RegExp_Arg *)0;
+
+ if (ap)
+ {
+ *(ap->refCount) += 1;
+ result = ap;
+ }
+ return (void *)result;
+#else
+ return 0;
+#endif
+}
+
+/*---------------------------------------------------------------------------
+| Facility : libnform
+| Function : static void Free_RegularExpression_Type(void * argp)
+|
+| Description : Free structure for regex type argument.
+|
+| Return Values : -
++--------------------------------------------------------------------------*/
+static void
+Free_RegularExpression_Type(void *argp)
+{
+#if HAVE_REGEX_H_FUNCS | HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
+ RegExp_Arg *ap = (RegExp_Arg *)argp;
+
+ if (ap)
+ {
+ if (--(*(ap->refCount)) == 0)
+ {
+#if HAVE_REGEX_H_FUNCS
+ if (ap->pRegExp)
+ {
+ free(ap->refCount);
+ regfree(ap->pRegExp);
+ }
+#elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
+ if (ap->compiled_expression)
+ {
+ free(ap->refCount);
+ free(ap->compiled_expression);
+ }
+#endif
+ free(ap);
+ }
+ }
+#endif
+}
+
+/*---------------------------------------------------------------------------
+| Facility : libnform
+| Function : static bool Check_RegularExpression_Field(
+| FIELD * field,
+| const void * argp)
+|
+| Description : Validate buffer content to be a valid regular expression
+|
+| Return Values : TRUE - field is valid
+| FALSE - field is invalid
++--------------------------------------------------------------------------*/
+static bool
+Check_RegularExpression_Field(FIELD *field, const void *argp)
+{
+ bool match = FALSE;
+
+#if HAVE_REGEX_H_FUNCS
+ const RegExp_Arg *ap = (const RegExp_Arg *)argp;
+
+ if (ap && ap->pRegExp)
+ match = (regexec(ap->pRegExp, field_buffer(field, 0), 0, NULL, 0)
+ ? FALSE
+ : TRUE);
+#elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
+ RegExp_Arg *ap = (RegExp_Arg *)argp;
+
+ if (ap && ap->compiled_expression)
+ match = (step(field_buffer(field, 0), ap->compiled_expression)
+ ? TRUE
+ : FALSE);
+#endif
+ return match;
+}
+
+static FIELDTYPE typeREGEXP =
+{
+ _HAS_ARGS | _RESIDENT,
+ 1, /* this is mutable, so we can't be const */
+ (FIELDTYPE *)0,
+ (FIELDTYPE *)0,
+ Make_RegularExpression_Type,
+ Copy_RegularExpression_Type,
+ Free_RegularExpression_Type,
+ Check_RegularExpression_Field,
+ NULL,
+ NULL,
+ NULL
+};
+
+NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_REGEXP = &typeREGEXP;
+
+/* fty_regex.c ends here */