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units(1): add libedit support

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Add line editing and history support to units(1) via libedit.

Reviewed by:	bdrewery
This commit is contained in:
Eitan Adler 2014-04-14 14:04:59 +00:00
parent cd2fccbb47
commit 647be2c3a9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=264458
2 changed files with 50 additions and 18 deletions
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3
usr.bin/units/Makefile
View File

@ -4,4 +4,7 @@ PROG= units
FILES= units.lib
FILESDIR= ${SHAREDIR}/misc
LDADD+=-ledit -ltermcap
DPADD+=${LIBEDIT} ${LIBTERMCAP}
.include <bsd.prog.mk>

65
usr.bin/units/units.c
View File

@ -23,6 +23,8 @@ static const char rcsid[] =
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <histedit.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -81,7 +83,7 @@ void initializeunit(struct unittype * theunit);
int addsubunit(char *product[], char *toadd);
void showunit(struct unittype * theunit);
void zeroerror(void);
int addunit(struct unittype *theunit, char *toadd, int flip, int quantity);
int addunit(struct unittype *theunit, const char *toadd, int flip, int quantity);
int compare(const void *item1, const void *item2);
void sortunit(struct unittype * theunit);
void cancelunit(struct unittype * theunit);
@ -94,6 +96,12 @@ int completereduce(struct unittype * unit);
void showanswer(struct unittype * have, struct unittype * want);
void usage(void);
static const char* promptstr = "";
static const char * prompt(EditLine *e __unused) {
return promptstr;
}
char *
dupstr(const char *str)
{
@ -304,7 +312,7 @@ zeroerror(void)
*/
int
addunit(struct unittype * theunit, char *toadd, int flip, int quantity)
addunit(struct unittype * theunit, const char *toadd, int flip, int quantity)
{
char *scratch, *savescr;
char *item;
@ -682,18 +690,25 @@ main(int argc, char **argv)
{
struct unittype have, want;
char havestr[81], wantstr[81];
const char * havestr;
const char * wantstr;
int optchar;
char *userfile = 0;
int quiet = 0;
char *userfile;
bool quiet;
History *inhistory;
EditLine *el;
HistEvent ev;
int inputsz;
userfile = NULL;
quiet = false;
while ((optchar = getopt(argc, argv, "Vqf:")) != -1) {
switch (optchar) {
case 'f':
userfile = optarg;
break;
case 'q':
quiet = 1;
quiet = true;
break;
case 'V':
fprintf(stderr, "FreeBSD units\n");
@ -707,11 +722,22 @@ main(int argc, char **argv)
if (optind != argc - 2 && optind != argc)
usage();
inhistory = history_init();
el = el_init(argv[0], stdin, stdout, stderr);
el_source(el, NULL);
el_set(el, EL_PROMPT, &prompt);
el_set(el, EL_EDITOR, "emacs");
el_set(el, EL_SIGNAL, 1);
el_set(el, EL_HIST, history, inhistory);
history(inhistory, &ev, H_SETSIZE, 800);
if (inhistory == 0)
err(1, "Could not initalize history");
readunits(userfile);
if (optind == argc - 2) {
strlcpy(havestr, argv[optind], sizeof(havestr));
strlcpy(wantstr, argv[optind + 1], sizeof(wantstr));
havestr = argv[optind];
wantstr = argv[optind + 1];
initializeunit(&have);
addunit(&have, havestr, 0, 1);
completereduce(&have);
@ -728,28 +754,31 @@ main(int argc, char **argv)
do {
initializeunit(&have);
if (!quiet)
printf("You have: ");
if (!fgets(havestr, sizeof(havestr), stdin)) {
if (!quiet)
putchar('\n');
promptstr = "You have: ";
havestr = el_gets(el, &inputsz);
if (havestr == NULL)
exit(0);
}
if (inputsz > 0)
history(inhistory, &ev, H_ENTER,
havestr);
} while (addunit(&have, havestr, 0, 1) ||
completereduce(&have));
do {
initializeunit(&want);
if (!quiet)
printf("You want: ");
if (!fgets(wantstr, sizeof(wantstr), stdin)) {
if (!quiet)
putchar('\n');
promptstr = "You want: ";
wantstr = el_gets(el, &inputsz);
if (wantstr == NULL)
exit(0);
}
if (inputsz > 0)
history(inhistory, &ev, H_ENTER,
wantstr);
} while (addunit(&want, wantstr, 0, 1) ||
completereduce(&want));
showanswer(&have, &want);
}
}
history_end(inhistory);
return(0);
}