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82 lines
2.9 KiB
C
82 lines
2.9 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 : Per Foreby, perf@efd.lth.se *
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* *
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***************************************************************************/
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#include "form.priv.h"
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MODULE_ID("$Id: fty_ipv4.c,v 1.4 2000/12/09 23:46:12 tom Exp $")
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : static bool Check_IPV4_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 IP number (Ver. 4)
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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_IPV4_Field(FIELD * field, const void * argp GCC_UNUSED)
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{
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char *bp = field_buffer(field,0);
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int num = 0, len;
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unsigned int d1, d2, d3, d4;
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if(isdigit((unsigned char)*bp)) /* Must start with digit */
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{
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num = sscanf(bp, "%u.%u.%u.%u%n", &d1, &d2, &d3, &d4, &len);
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if (num == 4)
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{
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bp += len; /* Make bp point to what sscanf() left */
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while (*bp && isspace((unsigned char)*bp))
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bp++; /* Allow trailing whitespace */
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}
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}
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return ((num != 4 || *bp || d1 > 255 || d2 > 255
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|| d3 > 255 || d4 > 255) ? FALSE : TRUE);
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : static bool Check_IPV4_Character(
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| int c,
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| const void *argp )
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| Description : Check a character for unsigned type or period.
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| Return Values : TRUE - character is valid
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| FALSE - character is invalid
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+--------------------------------------------------------------------------*/
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static bool Check_IPV4_Character(int c, const void * argp GCC_UNUSED)
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{
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return ((isdigit(c) || (c=='.')) ? TRUE : FALSE);
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}
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static FIELDTYPE typeIPV4 = {
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_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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NULL,
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NULL,
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NULL,
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Check_IPV4_Field,
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Check_IPV4_Character,
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NULL,
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NULL
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};
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NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_IPV4 = &typeIPV4;
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/* fty_ipv4.c ends here */
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