diff options
Diffstat (limited to 'contrib/nvi/vi/getc.c')
| -rw-r--r-- | contrib/nvi/vi/getc.c | 234 |
1 files changed, 0 insertions, 234 deletions
diff --git a/contrib/nvi/vi/getc.c b/contrib/nvi/vi/getc.c deleted file mode 100644 index 5e60adee96d7..000000000000 --- a/contrib/nvi/vi/getc.c +++ /dev/null @@ -1,234 +0,0 @@ -/*- - * Copyright (c) 1992, 1993, 1994 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1992, 1993, 1994, 1995, 1996 - * Keith Bostic. All rights reserved. - * - * See the LICENSE file for redistribution information. - */ - -#include "config.h" - -#ifndef lint -static const char sccsid[] = "@(#)getc.c 10.10 (Berkeley) 3/6/96"; -#endif /* not lint */ - -#include <sys/types.h> -#include <sys/queue.h> -#include <sys/time.h> - -#include <bitstring.h> -#include <ctype.h> -#include <limits.h> -#include <stdio.h> -#include <stdlib.h> - -#include "../common/common.h" -#include "vi.h" - -/* - * Character stream routines -- - * These routines return the file a character at a time. There are two - * special cases. First, the end of a line, end of a file, start of a - * file and empty lines are returned as special cases, and no character - * is returned. Second, empty lines include lines that have only white - * space in them, because the vi search functions don't care about white - * space, and this makes it easier for them to be consistent. - */ - -/* - * cs_init -- - * Initialize character stream routines. - * - * PUBLIC: int cs_init __P((SCR *, VCS *)); - */ -int -cs_init(sp, csp) - SCR *sp; - VCS *csp; -{ - int isempty; - - if (db_eget(sp, csp->cs_lno, &csp->cs_bp, &csp->cs_len, &isempty)) { - if (isempty) - msgq(sp, M_BERR, "177|Empty file"); - return (1); - } - if (csp->cs_len == 0 || v_isempty(csp->cs_bp, csp->cs_len)) { - csp->cs_cno = 0; - csp->cs_flags = CS_EMP; - } else { - csp->cs_flags = 0; - csp->cs_ch = csp->cs_bp[csp->cs_cno]; - } - return (0); -} - -/* - * cs_next -- - * Retrieve the next character. - * - * PUBLIC: int cs_next __P((SCR *, VCS *)); - */ -int -cs_next(sp, csp) - SCR *sp; - VCS *csp; -{ - char *p; - - switch (csp->cs_flags) { - case CS_EMP: /* EMP; get next line. */ - case CS_EOL: /* EOL; get next line. */ - if (db_get(sp, ++csp->cs_lno, 0, &p, &csp->cs_len)) { - --csp->cs_lno; - csp->cs_flags = CS_EOF; - } else { - csp->cs_bp = p; - if (csp->cs_len == 0 || - v_isempty(csp->cs_bp, csp->cs_len)) { - csp->cs_cno = 0; - csp->cs_flags = CS_EMP; - } else { - csp->cs_flags = 0; - csp->cs_ch = csp->cs_bp[csp->cs_cno = 0]; - } - } - break; - case 0: - if (csp->cs_cno == csp->cs_len - 1) - csp->cs_flags = CS_EOL; - else - csp->cs_ch = csp->cs_bp[++csp->cs_cno]; - break; - case CS_EOF: /* EOF. */ - break; - default: - abort(); - /* NOTREACHED */ - } - return (0); -} - -/* - * cs_fspace -- - * If on a space, eat forward until something other than a - * whitespace character. - * - * XXX - * Semantics of checking the current character were coded for the fword() - * function -- once the other word routines are converted, they may have - * to change. - * - * PUBLIC: int cs_fspace __P((SCR *, VCS *)); - */ -int -cs_fspace(sp, csp) - SCR *sp; - VCS *csp; -{ - if (csp->cs_flags != 0 || !isblank(csp->cs_ch)) - return (0); - for (;;) { - if (cs_next(sp, csp)) - return (1); - if (csp->cs_flags != 0 || !isblank(csp->cs_ch)) - break; - } - return (0); -} - -/* - * cs_fblank -- - * Eat forward to the next non-whitespace character. - * - * PUBLIC: int cs_fblank __P((SCR *, VCS *)); - */ -int -cs_fblank(sp, csp) - SCR *sp; - VCS *csp; -{ - for (;;) { - if (cs_next(sp, csp)) - return (1); - if (csp->cs_flags == CS_EOL || csp->cs_flags == CS_EMP || - csp->cs_flags == 0 && isblank(csp->cs_ch)) - continue; - break; - } - return (0); -} - -/* - * cs_prev -- - * Retrieve the previous character. - * - * PUBLIC: int cs_prev __P((SCR *, VCS *)); - */ -int -cs_prev(sp, csp) - SCR *sp; - VCS *csp; -{ - switch (csp->cs_flags) { - case CS_EMP: /* EMP; get previous line. */ - case CS_EOL: /* EOL; get previous line. */ - if (csp->cs_lno == 1) { /* SOF. */ - csp->cs_flags = CS_SOF; - break; - } - if (db_get(sp, /* The line should exist. */ - --csp->cs_lno, DBG_FATAL, &csp->cs_bp, &csp->cs_len)) { - ++csp->cs_lno; - return (1); - } - if (csp->cs_len == 0 || v_isempty(csp->cs_bp, csp->cs_len)) { - csp->cs_cno = 0; - csp->cs_flags = CS_EMP; - } else { - csp->cs_flags = 0; - csp->cs_cno = csp->cs_len - 1; - csp->cs_ch = csp->cs_bp[csp->cs_cno]; - } - break; - case CS_EOF: /* EOF: get previous char. */ - case 0: - if (csp->cs_cno == 0) - if (csp->cs_lno == 1) - csp->cs_flags = CS_SOF; - else - csp->cs_flags = CS_EOL; - else - csp->cs_ch = csp->cs_bp[--csp->cs_cno]; - break; - case CS_SOF: /* SOF. */ - break; - default: - abort(); - /* NOTREACHED */ - } - return (0); -} - -/* - * cs_bblank -- - * Eat backward to the next non-whitespace character. - * - * PUBLIC: int cs_bblank __P((SCR *, VCS *)); - */ -int -cs_bblank(sp, csp) - SCR *sp; - VCS *csp; -{ - for (;;) { - if (cs_prev(sp, csp)) - return (1); - if (csp->cs_flags == CS_EOL || csp->cs_flags == CS_EMP || - csp->cs_flags == 0 && isblank(csp->cs_ch)) - continue; - break; - } - return (0); -} |