gno/bin/vi/param.c

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/*
* STEVIE - Simply Try this Editor for VI Enthusiasts
*
* Code Contributions By : Tim Thompson twitch!tjt
* Tony Andrews onecom!wldrdg!tony
* G. R. (Fred) Walter watmath!grwalter
*/
/*
* Code to handle user-settable parameters. This is all pretty much table-
* driven. To add a new parameter, put it in the params array, and add a
* macro for it in param.h. If it's a numeric parameter, add any necessary
* bounds checks to doset(). String parameters aren't currently supported.
*/
#include "stevie.h"
struct param params[] = {
{"tabstop", "ts", 8, P_NUM},
{"scroll", "scroll", 12, P_NUM},
{"report", "report", 5, P_NUM},
{"lines", "lines", 25, P_NUM},
{"vbell", "vb", TRUE, P_BOOL},
{"showmatch", "sm", FALSE, P_BOOL},
{"wrapscan", "ws", TRUE, P_BOOL},
{"errorbells", "eb", FALSE, P_BOOL},
{"showmode", "mo", FALSE, P_BOOL},
{"backup", "bk", FALSE, P_BOOL},
{"return", "cr", TRUE, P_BOOL},
{"list", "list", FALSE, P_BOOL},
{"ignorecase", "ic", FALSE, P_BOOL},
{"autoindent", "ai", FALSE, P_BOOL},
{"number", "nu", FALSE, P_BOOL},
{"", "", 0, 0} /* end marker */
};
static void showparms(bool_t);
void
doset(char *arg, bool_t inter)
/* char *arg; /* parameter string */
/* bool_t inter; /* TRUE if called interactively */
{
int i;
char *s;
bool_t did_lines = FALSE;
bool_t state = TRUE; /* new state of boolean parms. */
if (arg == NULL) {
showparms(FALSE);
return;
}
if (strncmp(arg, "all", 3) == 0) {
showparms(TRUE);
return;
}
if (strncmp(arg, "no", 2) == 0) {
state = FALSE;
arg += 2;
}
for (i = 0; params[i].fullname[0] != NUL; i++) {
s = params[i].fullname;
if (strncmp(arg, s, strlen(s)) == 0) /* matched full name */
break;
s = params[i].shortname;
if (strncmp(arg, s, strlen(s)) == 0) /* matched short name */
break;
}
if (params[i].fullname[0] != NUL) { /* found a match */
if (params[i].flags & P_NUM) {
did_lines = (i == P_LI);
if (inter && (arg[strlen(s)] != '=' || state == FALSE))
emsg("Invalid set of numeric parameter");
else {
params[i].value = atoi(arg + strlen(s) + 1);
params[i].flags |= P_CHANGED;
}
} else { /* boolean */
if (inter && (arg[strlen(s)] == '='))
emsg("Invalid set of boolean parameter");
else {
params[i].value = state;
params[i].flags |= P_CHANGED;
}
}
} else {
if (inter)
emsg("Unrecognized 'set' option");
}
if (did_lines) {
Rows = P(P_LI);
screenalloc(); /* allocate new screen buffers */
s_clear();
}
/*
* Mark the screen contents as not valid in case we changed something
* like "tabstop" or "list" that will change its appearance.
*/
if (inter)
S_NOT_VALID;
/*
* Check the bounds for numeric parameters here
*/
if (P(P_TS) <= 0 || P(P_TS) > 32) {
if (inter)
emsg("Invalid tab size specified");
P(P_TS) = 8;
return;
}
if (P(P_SS) <= 0 || P(P_SS) > Rows) {
if (inter)
emsg("Invalid scroll size specified");
P(P_SS) = 12;
return;
}
/*
* Check for another argument, and call doset() recursively, if found. If
* any argument results in an error, no further parameters are processed.
*/
while (*arg != ' ' && *arg != '\t') { /* skip to next white space */
if (*arg == NUL)
return; /* end of parameter list */
arg++;
}
while (*arg == ' ' || *arg == '\t') /* skip to next non-white */
arg++;
if (*arg)
doset(arg, TRUE); /* recurse on next parameter, if present */
}
static void
showparms(bool_t all)
/* bool_t all; /* show ALL parameters */
{
struct param *p;
char buf[64];
gotocmdline(YES, NUL);
outstr("Parameters:\r\n");
for (p = &params[0]; p->fullname[0] != NUL; p++) {
if (!all && ((p->flags & P_CHANGED) == 0))
continue;
if (p->flags & P_BOOL)
sprintf(buf, "\t%s%s\r\n",
(p->value ? "" : "no"), p->fullname);
else
sprintf(buf, "\t%s=%d\r\n", p->fullname, p->value);
outstr(buf);
}
wait_return();
}