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-
- /*
- * 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 *
- * Contact: http://www.familiepfeifer.de/Contact.aspx?Lang=en *
- * *
- ***************************************************************************/
-
- #include "form.priv.h"
-
- MODULE_ID("$Id: fty_enum.c,v 1.16 2002/07/13 11:35:08 juergen Exp $")
-
- typedef struct {
- char **kwds;
- int count;
- bool checkcase;
- bool checkunique;
- } enumARG;
-
- /*---------------------------------------------------------------------------
- | Facility : libnform
- | Function : static void *Make_Enum_Type( va_list * ap )
- |
- | Description : Allocate structure for enumeration type argument.
- |
- | Return Values : Pointer to argument structure or NULL on error
- +--------------------------------------------------------------------------*/
- static void *Make_Enum_Type(va_list * ap)
- {
- enumARG *argp = (enumARG *)malloc(sizeof(enumARG));
-
- if (argp)
- {
- int cnt = 0;
- char **kp = (char **)0;
- int ccase, cunique;
-
- argp->kwds = va_arg(*ap,char **);
- ccase = va_arg(*ap,int);
- cunique = va_arg(*ap,int);
- argp->checkcase = ccase ? TRUE : FALSE;
- argp->checkunique = cunique ? TRUE : FALSE;
-
- kp = argp->kwds;
- while( kp && (*kp++) ) cnt++;
- argp->count = cnt;
- }
- return (void *)argp;
- }
-
- /*---------------------------------------------------------------------------
- | Facility : libnform
- | Function : static void *Copy_Enum_Type( const void * argp )
- |
- | Description : Copy structure for enumeration type argument.
- |
- | Return Values : Pointer to argument structure or NULL on error.
- +--------------------------------------------------------------------------*/
- static void *Copy_Enum_Type(const void * argp)
- {
- enumARG *result = (enumARG *)0;
-
- if (argp)
- {
- const enumARG *ap = (const enumARG *)argp;
-
- result = (enumARG *)malloc(sizeof(enumARG));
- if (result)
- *result = *ap;
- }
- return (void *)result;
- }
-
- /*---------------------------------------------------------------------------
- | Facility : libnform
- | Function : static void Free_Enum_Type( void * argp )
- |
- | Description : Free structure for enumeration type argument.
- |
- | Return Values : -
- +--------------------------------------------------------------------------*/
- static void Free_Enum_Type(void * argp)
- {
- if (argp)
- free(argp);
- }
-
- #define SKIP_SPACE(x) while(((*(x))!='\0') && (is_blank(*(x)))) (x)++
- #define NOMATCH 0
- #define PARTIAL 1
- #define EXACT 2
-
- /*---------------------------------------------------------------------------
- | Facility : libnform
- | Function : static int Compare(const unsigned char * s,
- | const unsigned char * buf,
- | bool ccase )
- |
- | Description : Check wether or not the text in 'buf' matches the
- | text in 's', at least partial.
- |
- | Return Values : NOMATCH - buffer doesn't match
- | PARTIAL - buffer matches partially
- | EXACT - buffer matches exactly
- +--------------------------------------------------------------------------*/
- static int Compare(const unsigned char *s, const unsigned char *buf,
- bool ccase)
- {
- SKIP_SPACE(buf); /* Skip leading spaces in both texts */
- SKIP_SPACE(s);
-
- if (*buf=='\0')
- {
- return (((*s)!='\0') ? NOMATCH : EXACT);
- }
- else
- {
- if (ccase)
- {
- while(*s++ == *buf)
- {
- if (*buf++=='\0') return EXACT;
- }
- }
- else
- {
- while(toupper(*s++)==toupper(*buf))
- {
- if (*buf++=='\0') return EXACT;
- }
- }
- }
- /* At this location buf points to the first character where it no longer
- matches with s. So if only blanks are following, we have a partial
- match otherwise there is no match */
- SKIP_SPACE(buf);
- if (*buf)
- return NOMATCH;
-
- /* If it happens that the reference buffer is at its end, the partial
- match is actually an exact match. */
- return ((s[-1]!='\0') ? PARTIAL : EXACT);
- }
-
- /*---------------------------------------------------------------------------
- | Facility : libnform
- | Function : static bool Check_Enum_Field(
- | FIELD * field,
- | const void * argp)
- |
- | Description : Validate buffer content to be a valid enumeration value
- |
- | Return Values : TRUE - field is valid
- | FALSE - field is invalid
- +--------------------------------------------------------------------------*/
- static bool Check_Enum_Field(FIELD * field, const void * argp)
- {
- char **kwds = ((const enumARG *)argp)->kwds;
- bool ccase = ((const enumARG *)argp)->checkcase;
- bool unique = ((const enumARG *)argp)->checkunique;
- unsigned char *bp = (unsigned char *)field_buffer(field,0);
- char *s, *t, *p;
- int res;
-
- while( kwds && (s=(*kwds++)) )
- {
- if ((res=Compare((unsigned char *)s,bp,ccase))!=NOMATCH)
- {
- p=t=s; /* t is at least a partial match */
- if ((unique && res!=EXACT))
- {
- while( kwds && (p = *kwds++) )
- {
- if ((res=Compare((unsigned char *)p,bp,ccase))!=NOMATCH)
- {
- if (res==EXACT)
- {
- t = p;
- break;
- }
- else
- t = (char *)0;
- }
- }
- }
- if (t)
- {
- set_field_buffer(field,0,t);
- return TRUE;
- }
- if (!p)
- break;
- }
- }
- return FALSE;
- }
-
- static const char *dummy[] = { (char *)0 };
-
- /*---------------------------------------------------------------------------
- | Facility : libnform
- | Function : static bool Next_Enum(FIELD * field,
- | const void * argp)
- |
- | Description : Check for the next enumeration value
- |
- | Return Values : TRUE - next value found and loaded
- | FALSE - no next value loaded
- +--------------------------------------------------------------------------*/
- static bool Next_Enum(FIELD * field, const void * argp)
- {
- const enumARG *args = (const enumARG *)argp;
- char **kwds = args->kwds;
- bool ccase = args->checkcase;
- int cnt = args->count;
- unsigned char *bp = (unsigned char *)field_buffer(field,0);
-
- if (kwds) {
- while(cnt--)
- {
- if (Compare((unsigned char *)(*kwds++),bp,ccase)==EXACT)
- break;
- }
- if (cnt<=0)
- kwds = args->kwds;
- if ((cnt>=0) || (Compare((const unsigned char *)dummy,bp,ccase)==EXACT))
- {
- set_field_buffer(field,0,*kwds);
- return TRUE;
- }
- }
- return FALSE;
- }
-
- /*---------------------------------------------------------------------------
- | Facility : libnform
- | Function : static bool Previous_Enum(
- | FIELD * field,
- | const void * argp)
- |
- | Description : Check for the previous enumeration value
- |
- | Return Values : TRUE - previous value found and loaded
- | FALSE - no previous value loaded
- +--------------------------------------------------------------------------*/
- static bool Previous_Enum(FIELD * field, const void * argp)
- {
- const enumARG *args = (const enumARG *)argp;
- int cnt = args->count;
- char **kwds = &args->kwds[cnt-1];
- bool ccase = args->checkcase;
- unsigned char *bp = (unsigned char *)field_buffer(field,0);
-
- if (kwds) {
- while(cnt--)
- {
- if (Compare((unsigned char *)(*kwds--),bp,ccase)==EXACT)
- break;
- }
-
- if (cnt<=0)
- kwds = &args->kwds[args->count-1];
-
- if ((cnt>=0) || (Compare((const unsigned char *)dummy,bp,ccase)==EXACT))
- {
- set_field_buffer(field,0,*kwds);
- return TRUE;
- }
- }
- return FALSE;
- }
-
-
- static FIELDTYPE typeENUM = {
- _HAS_ARGS | _HAS_CHOICE | _RESIDENT,
- 1, /* this is mutable, so we can't be const */
- (FIELDTYPE *)0,
- (FIELDTYPE *)0,
- Make_Enum_Type,
- Copy_Enum_Type,
- Free_Enum_Type,
- Check_Enum_Field,
- NULL,
- Next_Enum,
- Previous_Enum
- };
-
- NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_ENUM = &typeENUM;
-
- /* fty_enum.c ends here */
-