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form_field_validation(3curses) [opensolaris man page]

form_field_validation(3CURSES)				     Curses Library Functions				    form_field_validation(3CURSES)

NAME
form_field_validation, set_field_type, field_type, field_arg - forms field data type validation SYNOPSIS
cc [ flag... ] file... -lform -lcurses [ library... ] #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, and 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 VALUES
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. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |MT-Level |Unsafe | +-----------------------------+-----------------------------+ SEE ALSO
curses(3CURSES), forms(3CURSES), attributes(5) NOTES
The header <form.h> automatically includes the headers <eti.h> and <curses.h>. SunOS 5.11 31 Dec 1996 form_field_validation(3CURSES)

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form_field_validation(3X)												 form_field_validation(3X)

NAME
form_field_validation - data type validation for fields SYNOPSIS
#include <form.h> int set_field_type(FIELD *field, FIELDTYPE *type, ...); FIELDTYPE *field_type(const FIELD *field); void *field_arg(const FIELD *field); FIELDTYPE *TYPE_ALNUM; FIELDTYPE *TYPE_ALPHA; FIELDTYPE *TYPE_ENUM; FIELDTYPE *TYPE_INTEGER; FIELDTYPE *TYPE_NUMERIC; FIELDTYPE *TYPE_REGEXP; FIELDTYPE *TYPE_IPV4; DESCRIPTION
The function set_field_type declares a data type for a given form field. This is the type checked by validation functions. The predefined types are as follows: TYPE_ALNUM Alphanumeric data. Requires a third int argument, a minimum field width. TYPE_ALPHA Character data. Requires a third int argument, a minimum field width. TYPE_ENUM Accept one of a specified set of strings. Requires a third (char **) argument pointing to a string list; a fourth int flag argument to enable case-sensitivity; and a fifth int flag argument specifying whether a partial match must be a unique one (if this flag is off, a prefix matches the first of any set of more than one list elements with that prefix). Please notice that the string list is copied. So you may use a list that lives in automatic variables on the stack. TYPE_INTEGER Integer data, parsable to an integer by atoi(3). Requires a third int argument controlling the precision, a fourth long argument con- straining minimum value, and a fifth long constraining maximum value. If the maximum value is less than or equal to the minimum value, the range is simply ignored. On return the field buffer is formatted according to the printf format specification ".*ld", where the '*' is replaced by the precision argument. For details of the precision handling see printf's man-page. TYPE_NUMERIC Numeric data (may have a decimal-point part). Requires a third int argument controlling the precision, a fourth double argument con- straining minimum value, and a fifth double constraining maximum value. If your system supports locales, the decimal point character to be used must be the one specified by your locale. If the maximum value is less than or equal to the minimum value, the range is simply ignored. On return the field buffer is formatted according to the printf format specification ".*f", where the '*' is replaced by the precision argument. For details of the precision handling see printf's man-page. TYPE_REGEXP Regular expression data. Requires a regular expression (char *) third argument; the data is valid if the regular expression matches it. Regular expressions are in the format of regcomp and regexec. Please notice that the regular expression must match the whole field. If you have for example an eight character wide field, a regular expression "^[0-9]*$" always means that you have to fill all eight positions with digits. If you want to allow fewer digits, you may use for example "^[0-9]* *$" which is good for trailing spaces (up to an empty field), or "^ *[0-9]* *$" which is good for leading and trailing spaces around the digits. TYPE_IPV4 An Internet Protocol Version 4 address. This requires no additional argument. It is checked whether or not the buffer has the form a.b.c.d, where a,b,c and d are numbers between 0 and 255. Trailing blanks in the buffer are ignored. The address itself is not vali- dated. Please note that this is an ncurses extension. This field type may not be available in other curses implementations. It is possible to set up new programmer-defined field types. See the form_fieldtype(3X) manual page. RETURN VALUE
The functions field_type and field_arg return NULL on error. The function set_field_type returns one of the following: E_OK The routine succeeded. E_SYSTEM_ERROR System error occurred (see errno). SEE ALSO
curses(3X), form(3X), form_variables(3X). NOTES
The header file <form.h> automatically includes the header file <curses.h>. PORTABILITY
These routines emulate the System V forms library. They were not supported on Version 7 or BSD versions. AUTHORS
Juergen Pfeifer. Manual pages and adaptation for new curses by Eric S. Raymond. form_field_validation(3X)

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