mirror of
https://github.com/reactos/CMake.git
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265 lines
6.8 KiB
C
265 lines
6.8 KiB
C
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/*
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* THIS CODE IS SPECIFICALLY EXEMPTED FROM THE NCURSES PACKAGE COPYRIGHT.
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* You may freely copy it for use as a template for your own field types.
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* If you develop a field type that might be of general use, please send
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* it back to the ncurses maintainers for inclusion in the next version.
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*/
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/***************************************************************************
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* *
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* Author : Juergen Pfeifer, juergen.pfeifer@gmx.net *
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* *
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***************************************************************************/
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#include "form.priv.h"
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MODULE_ID("$Id$")
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#if HAVE_REGEX_H_FUNCS /* We prefer POSIX regex */
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#include <regex.h>
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typedef struct
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{
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regex_t *pRegExp;
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unsigned long *refCount;
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} RegExp_Arg;
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#elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
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#undef RETURN
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static int reg_errno;
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static char *RegEx_Init(char *instring)
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{
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reg_errno = 0;
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return instring;
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}
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static char *RegEx_Error(int code)
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{
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reg_errno = code;
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return 0;
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}
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#define INIT register char *sp = RegEx_Init(instring);
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#define GETC() (*sp++)
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#define PEEKC() (*sp)
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#define UNGETC(c) (--sp)
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#define RETURN(c) return(c)
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#define ERROR(c) return RegEx_Error(c)
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#if HAVE_REGEXP_H_FUNCS
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#include <regexp.h>
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#else
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#include <regexpr.h>
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#endif
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typedef struct
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{
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char *compiled_expression;
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unsigned long *refCount;
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} RegExp_Arg;
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/* Maximum Length we allow for a compiled regular expression */
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#define MAX_RX_LEN (2048)
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#define RX_INCREMENT (256)
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#endif
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : static void *Make_RegularExpression_Type(va_list * ap)
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| Description : Allocate structure for regex type argument.
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| Return Values : Pointer to argument structure or NULL on error
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+--------------------------------------------------------------------------*/
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static void *Make_RegularExpression_Type(va_list * ap)
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{
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#if HAVE_REGEX_H_FUNCS
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char *rx = va_arg(*ap,char *);
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RegExp_Arg *preg;
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preg = (RegExp_Arg*)malloc(sizeof(RegExp_Arg));
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if (preg)
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{
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if (((preg->pRegExp = (regex_t*)malloc(sizeof(regex_t))) != (regex_t*)0)
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&& !regcomp(preg->pRegExp,rx,
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(REG_EXTENDED | REG_NOSUB | REG_NEWLINE) ))
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{
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preg->refCount = (unsigned long *)malloc(sizeof(unsigned long));
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*(preg->refCount) = 1;
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}
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else
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{
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if (preg->pRegExp)
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free(preg->pRegExp);
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free(preg);
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preg = (RegExp_Arg*)0;
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}
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}
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return((void *)preg);
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#elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
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char *rx = va_arg(*ap,char *);
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RegExp_Arg *pArg;
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pArg = (RegExp_Arg *)malloc(sizeof(RegExp_Arg));
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if (pArg)
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{
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int blen = RX_INCREMENT;
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pArg->compiled_expression = NULL;
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pArg->refCount = (unsigned long *)malloc(sizeof(unsigned long));
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*(pArg->refCount) = 1;
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do {
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char *buf = (char *)malloc(blen);
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if (buf)
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{
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#if HAVE_REGEXP_H_FUNCS
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char *last_pos = compile (rx, buf, &buf[blen], '\0');
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#else /* HAVE_REGEXPR_H_FUNCS */
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char *last_pos = compile (rx, buf, &buf[blen]);
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#endif
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if (reg_errno)
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{
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free(buf);
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if (reg_errno==50)
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blen += RX_INCREMENT;
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else
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{
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free(pArg);
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pArg = NULL;
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break;
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}
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}
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else
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{
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pArg->compiled_expression = buf;
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break;
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}
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}
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} while( blen <= MAX_RX_LEN );
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}
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if (pArg && !pArg->compiled_expression)
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{
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free(pArg);
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pArg = NULL;
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}
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return (void *)pArg;
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#else
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ap=0; /* Silence unused parameter warning. */
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return 0;
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#endif
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : static void *Copy_RegularExpression_Type(
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| const void * argp)
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| Description : Copy structure for regex type argument.
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| Return Values : Pointer to argument structure or NULL on error.
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+--------------------------------------------------------------------------*/
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static void *Copy_RegularExpression_Type(const void * argp)
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{
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#if (HAVE_REGEX_H_FUNCS | HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS)
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const RegExp_Arg *ap = (const RegExp_Arg *)argp;
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const RegExp_Arg *result = (const RegExp_Arg *)0;
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if (ap)
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{
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*(ap->refCount) += 1;
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result = ap;
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}
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return (void *)result;
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#else
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argp=0; /* Silence unused parameter warning. */
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return 0;
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#endif
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : static void Free_RegularExpression_Type(void * argp)
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| Description : Free structure for regex type argument.
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| Return Values : -
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+--------------------------------------------------------------------------*/
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static void Free_RegularExpression_Type(void * argp)
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{
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#if HAVE_REGEX_H_FUNCS | HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
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RegExp_Arg *ap = (RegExp_Arg *)argp;
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if (ap)
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{
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if (--(*(ap->refCount)) == 0)
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{
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#if HAVE_REGEX_H_FUNCS
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if (ap->pRegExp)
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{
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free(ap->refCount);
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regfree(ap->pRegExp);
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}
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#elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
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if (ap->compiled_expression)
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{
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free(ap->refCount);
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free(ap->compiled_expression);
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}
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#endif
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free(ap);
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}
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}
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#else
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argp=0; /* Silence unused parameter warning. */
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#endif
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : static bool Check_RegularExpression_Field(
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| FIELD * field,
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| const void * argp)
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| Description : Validate buffer content to be a valid regular expression
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| Return Values : TRUE - field is valid
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| FALSE - field is invalid
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+--------------------------------------------------------------------------*/
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static bool Check_RegularExpression_Field(FIELD * field, const void * argp)
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{
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bool match = FALSE;
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#if HAVE_REGEX_H_FUNCS
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const RegExp_Arg *ap = (const RegExp_Arg*)argp;
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if (ap && ap->pRegExp)
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match = (regexec(ap->pRegExp,field_buffer(field,0),0,NULL,0) ? FALSE:TRUE);
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#elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS
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RegExp_Arg *ap = (RegExp_Arg *)argp;
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if (ap && ap->compiled_expression)
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match = (step(field_buffer(field,0),ap->compiled_expression) ? TRUE:FALSE);
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#else
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argp=0; /* Silence unused parameter warning. */
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field=0; /* Silence unused parameter warning. */
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#endif
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return match;
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}
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static FIELDTYPE typeREGEXP = {
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_HAS_ARGS | _RESIDENT,
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1, /* this is mutable, so we can't be const */
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(FIELDTYPE *)0,
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(FIELDTYPE *)0,
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Make_RegularExpression_Type,
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Copy_RegularExpression_Type,
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Free_RegularExpression_Type,
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Check_RegularExpression_Field,
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NULL,
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NULL,
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NULL
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};
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FIELDTYPE* TYPE_REGEXP = &typeREGEXP;
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/* fty_regex.c ends here */
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