| |
| /* |
| * 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("$Id$") |
| |
| #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 |
| ap=0; /* Silence unused parameter warning. */ |
| 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 |
| argp=0; /* Silence unused parameter warning. */ |
| 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); |
| } |
| } |
| #else |
| argp=0; /* Silence unused parameter warning. */ |
| #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); |
| #else |
| argp=0; /* Silence unused parameter warning. */ |
| field=0; /* Silence unused parameter warning. */ |
| #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 */ |