/* * 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 : Per Foreby, perf@efd.lth.se * * * ***************************************************************************/ #include "form.priv.h" MODULE_ID("$Id: fty_ipv4.c,v 1.6 2004/05/29 19:13:48 tom Exp $") /*--------------------------------------------------------------------------- | Facility : libnform | Function : static bool Check_IPV4_Field( | FIELD * field, | const void * argp) | | Description : Validate buffer content to be a valid IP number (Ver. 4) | | Return Values : TRUE - field is valid | FALSE - field is invalid +--------------------------------------------------------------------------*/ static bool Check_IPV4_Field(FIELD *field, const void *argp GCC_UNUSED) { char *bp = field_buffer(field, 0); int num = 0, len; unsigned int d1, d2, d3, d4; if (isdigit(UChar(*bp))) /* Must start with digit */ { num = sscanf(bp, "%u.%u.%u.%u%n", &d1, &d2, &d3, &d4, &len); if (num == 4) { bp += len; /* Make bp point to what sscanf() left */ while (*bp && isspace(UChar(*bp))) bp++; /* Allow trailing whitespace */ } } return ((num != 4 || *bp || d1 > 255 || d2 > 255 || d3 > 255 || d4 > 255) ? FALSE : TRUE); } /*--------------------------------------------------------------------------- | Facility : libnform | Function : static bool Check_IPV4_Character( | int c, | const void *argp ) | | Description : Check a character for unsigned type or period. | | Return Values : TRUE - character is valid | FALSE - character is invalid +--------------------------------------------------------------------------*/ static bool Check_IPV4_Character(int c, const void *argp GCC_UNUSED) { return ((isdigit(UChar(c)) || (c == '.')) ? TRUE : FALSE); } static FIELDTYPE typeIPV4 = { _RESIDENT, 1, /* this is mutable, so we can't be const */ (FIELDTYPE *)0, (FIELDTYPE *)0, NULL, NULL, NULL, Check_IPV4_Field, Check_IPV4_Character, NULL, NULL }; NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_IPV4 = &typeIPV4; /* fty_ipv4.c ends here */