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authorPeter Wemm <peter@FreeBSD.org>1999-08-24 01:06:48 +0000
committerPeter Wemm <peter@FreeBSD.org>1999-08-24 01:06:48 +0000
commit0e3d540892016a47f6a68ec9ba2879d35ce5f7c2 (patch)
treead214c5b2c8142ad6dc6d2ce3a9c83e6317d7f77 /contrib/ncurses/form/fty_regex.c
downloadsrc-0e3d540892016a47f6a68ec9ba2879d35ce5f7c2.tar.gz
src-0e3d540892016a47f6a68ec9ba2879d35ce5f7c2.zip
Import unmodified (but trimmed) ncurses 5.0 prerelease 990821.vendor/ncurses/5.0-19990821
This contains the full eti (panel, form, menu) extensions. bmake glue to follow. Obtained from: ftp://ftp.clark.net/pub/dickey/ncurses
Notes
Notes: svn path=/vendor/ncurses/dist/; revision=50276 svn path=/vendor/ncurses/5.0-19990821/; revision=50278; tag=vendor/ncurses/5.0-19990821
Diffstat (limited to 'contrib/ncurses/form/fty_regex.c')
-rw-r--r--contrib/ncurses/form/fty_regex.c257
1 files changed, 257 insertions, 0 deletions
diff --git a/contrib/ncurses/form/fty_regex.c b/contrib/ncurses/form/fty_regex.c
new file mode 100644
index 000000000000..7a928125d4ad
--- /dev/null
+++ b/contrib/ncurses/form/fty_regex.c
@@ -0,0 +1,257 @@
+
+/*
+ * THIS CODE IS SPECIFICALLY EXEMPTED FROM THE NCURSES PACKAGE COPYRIGHT.
+ * You may freely copy it for use as a template for your own field types.
+ * If you develop a field type that might be of general use, please send
+ * it back to the ncurses maintainers for inclusion in the next version.
+ */
+/***************************************************************************
+* *
+* Author : Juergen Pfeifer, juergen.pfeifer@gmx.net *
+* *
+***************************************************************************/
+
+#include "form.priv.h"
+
+MODULE_ID("$Id: fty_regex.c,v 1.14 1999/05/16 17:23:38 juergen 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 = (RegExp_Arg*)malloc(sizeof(RegExp_Arg));
+ if (preg)
+ {
+ if (((preg->pRegExp = (regex_t*)malloc(sizeof(regex_t))) != (regex_t*)0)
+ && !regcomp(preg->pRegExp,rx,
+ (REG_EXTENDED | REG_NOSUB | REG_NEWLINE) ))
+ {
+ preg->refCount = (unsigned long *)malloc(sizeof(unsigned long));
+ *(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 = (RegExp_Arg *)malloc(sizeof(RegExp_Arg));
+
+ if (pArg)
+ {
+ int blen = RX_INCREMENT;
+ pArg->compiled_expression = NULL;
+ pArg->refCount = (unsigned long *)malloc(sizeof(unsigned long));
+ *(pArg->refCount) = 1;
+
+ do {
+ char *buf = (char *)malloc(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
+};
+
+FIELDTYPE* TYPE_REGEXP = &typeREGEXP;
+
+/* fty_regex.c ends here */