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form_f_valid(3)

forms field data type validation

From the original Amiga UNIX 2.1 manual. Some things it mentions may not be in this release.

NAME

form_field_validation: set_field_type, field_type, field_arg - forms field data type validation

SYNOPSIS

#include <form.h>

int set_field_type(FIELD *field, FIELDTYPE *type, ...);

FIELDTYPE *field_type(FIELD *field);
char *field_arg(FIELD *field);

DESCRIPTION

set_field_type associates the specified field type with field. Certain field types take additional arguments. TYPE_ALNUM, for instance, requires one, the minimum width specification for the field. The other predefined field types are: TYPE_ALPHA, TYPE_ENUM, TYPE_INTEGER, TYPE_NUMERIC, TYPE_REGEXP.

field_type returns a pointer to the field type of field. NULL is returned if no field type is assigned.

field_arg returns a pointer to the field arguments associated with the field type of field. NULL is returned if no field type is assigned.

RETURN VALUE

field_type and field_arg return NULL on error.

set_field_type returns one of the following:
E_OK           - The function returned successfully.
E_SYSTEM_ERROR - System error.

NOTES