diff options
Diffstat (limited to 'option.c')
| -rw-r--r-- | option.c | 25 |
1 files changed, 22 insertions, 3 deletions
@@ -1,5 +1,5 @@ /* - * Copyright (C) 1984-2019 Mark Nudelman + * Copyright (C) 1984-2020 Mark Nudelman * * You may distribute under the terms of either the GNU General Public * License or the Less License, as specified in the README file. @@ -23,8 +23,9 @@ static struct loption *pendopt; public int plusoption = FALSE; -static char *optstring(); -static int flip_triple(); +static char *optstring LESSPARAMS((char *s, char **p_str, char *printopt, + char *validchars)); +static int flip_triple LESSPARAMS((int val, int lc)); extern int screen_trashed; extern int less_is_more; @@ -526,6 +527,24 @@ opt_prompt(o) } /* + * If the specified option can be toggled, return NULL. + * Otherwise return an appropriate error message. + */ + public char * +opt_toggle_disallowed(c) + int c; +{ + switch (c) + { + case 'o': + if (ch_getflags() & CH_CANSEEK) + return "Input is not a pipe"; + break; + } + return NULL; +} + +/* * Return whether or not there is a string option pending; * that is, if the previous option was a string-valued option letter * (like -P) without a following string. |