c89 - iomenu - interactive terminal-based selection menu
HTML git clone git://bitreich.org/iomenu git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/iomenu
DIR Log
DIR Files
DIR Refs
DIR Tags
DIR README
DIR LICENSE
---
DIR commit f979f7c13ea6a13dfda617bc70e2e4cff9bd3879
DIR parent 831d075aa676cd1905db7374143f296b211ae4e5
HTML Author: Josuah Demangeon <mail@josuah.net>
Date: Sun, 16 Apr 2017 13:03:15 +0200
c89
Diffstat:
M Makefile | 2 +-
M iomenu.1 | 4 +++-
M iomenu.c | 101 +++++++++++++++++++------------
3 files changed, 67 insertions(+), 40 deletions(-)
---
DIR diff --git a/Makefile b/Makefile
@@ -1,4 +1,4 @@
-CFLAGS = -std=c99 -Wpedantic -Wall -Wextra -g # -static
+CFLAGS = -std=c89 -Wpedantic -Wall -Wextra -g # -static
OBJ = ${SRC:.c=.o}
all: clean iomenu
DIR diff --git a/iomenu.1 b/iomenu.1
@@ -14,7 +14,9 @@
.
.
.Nm
-.Op Fl tbs
+.Op Fl t
+.Op Fl b
+.Op Fl s
.Op Fl l Ar lines
.Op Fl p Ar prompt
.
DIR diff --git a/iomenu.c b/iomenu.c
@@ -12,19 +12,20 @@
#define CONTINUE 2 /* as opposed to EXIT_SUCCESS and EXIT_FAILURE */
-#define CONTROL(char) (char ^ 0x40)
-#define MIN(X, Y) (((X) < (Y)) ? (X) : (Y))
+#define CONTROL(char) (char ^ 0x40)
+#define MIN(X, Y) (((X) < (Y)) ? (X) : (Y))
+
static struct winsize ws;
static struct termios termios;
int tty_fd;
-static int current = 0, offset = 0, prev = 0, next = 0;
-static int linec = 0, matchc = 0;
-static char **linev = NULL, **matchv = NULL;
-static char input[BUFSIZ], formatted[BUFSIZ * 8];
-static int opt_tb = 0, opt_l = 255;
-static char *opt_p = "", opt_s = '\0';
+static int current = 0, offset = 0, prev = 0, next = 0;
+static int linec = 0, matchc = 0;
+static char **linev = NULL, **matchv = NULL;
+static char input[BUFSIZ], formatted[BUFSIZ * 8];
+static int opt_tb = 0, opt_l = 255, opt_h = 0;
+static char *argv0, *opt_p = "", opt_s = '\0';
static void
@@ -87,8 +88,10 @@ reset_terminal(void)
extern struct termios termios;
extern struct winsize ws;
+ int i;
+
/* clear terminal */
- for (int i = 0; i < opt_l + 1; i++)
+ for (i = 0; i < opt_l + 1; i++)
fputs("\r\033[K\n", stderr);
/* reset cursor position */
@@ -136,20 +139,18 @@ read_lines(void)
}
-/*
- * Prepare a string for printing.
- */
static char *
format(char *str, int cols)
{
extern char formatted[BUFSIZ * 8];
- int j = 0;
+ int i, j;
- for (int i = 0; str[i] && j < cols; i++) {
+ for (i = j = 0; str[i] && j < cols; i++) {
if (str[i] == '\t') {
- for (int t = (j + 7) % 8 + 1; t > 0 && j < cols; t--)
+ int t = (j + 7) % 8 + 1;
+ while (t-- > 0 && j < cols)
formatted[j++] = ' ';
} else if (isprint(str[i])) {
@@ -172,10 +173,9 @@ print_lines(int count)
extern int opt_l;
extern char opt_s;
- int p = 0; /* amount of lines printed */
- offset = current / count * count;
+ int printed = 0, i = current / count * count;
- for (int i = offset; p < count && i < matchc; p++, i++) {
+ while (printed++ < count && i < matchc) {
char *s = format(matchv[i], ws.ws_col - 1);
if (opt_s && matchv[i][0] == '#') {
@@ -185,9 +185,11 @@ print_lines(int count)
} else {
fprintf(stderr, "\n\033[K %s\033[m", s);
}
+
+ i++;
}
- while (p++ < count)
+ while (printed++ < count)
fputs("\n\033[K", stderr);
}
@@ -197,12 +199,12 @@ print_screen(void)
{
extern char formatted[BUFSIZ * 8];
- int cols = ws.ws_col - 1;
+ int cols = ws.ws_col - 1, i;
+ int count = MIN(opt_l, ws.ws_row - 1);
fputs("\r\033[K", stderr);
/* items */
- int count = MIN(opt_l, ws.ws_row - 1);
print_lines(count);
fprintf(stderr, "\033[%dA", count);
@@ -212,7 +214,7 @@ print_screen(void)
if (opt_p[0] != '\0') {
format(opt_p, cols);
fputs("\033[30;47m ", stderr);
- for (int i = 0; formatted[i]; i++)
+ for (i = 0; formatted[i]; i++)
fputc(formatted[i], stderr);
fputs(" \033[m", stderr);
cols -= strlen(formatted) + 1;
@@ -233,8 +235,8 @@ match_line(char *line, char **tokv, int tokc)
if (opt_s && line[0] == opt_s)
return 2;
- for (int i = 0; i < tokc; i++)
- if (strstr(line, tokv[i]) == NULL)
+ while (tokc-- > 0)
+ if (strstr(line, tokv[tokc]) == NULL)
return 0;
return 1;
@@ -247,7 +249,9 @@ move_line(signed int count)
extern int current;
extern char **matchv;
- for (int i = current + count; 0 <= i && i < matchc; i += count) {
+ int i;
+
+ for (i = current + count; 0 <= i && i < matchc; i += count) {
if (!opt_s || matchv[i][0] != opt_s) {
current = i;
break;
@@ -260,7 +264,7 @@ static void
filter_lines(void)
{
char **tokv = NULL, *s, buffer[sizeof (input)];
- int tokc = 0, n = 0;
+ int tokc = 0, n = 0, i;
current = offset = prev = next = 0;
@@ -279,7 +283,7 @@ filter_lines(void)
}
matchc = 0;
- for (int i = 0; i < linec; i++)
+ for (i = 0; i < linec; i++)
if (match_line(linev[i], tokv, tokc))
matchv[matchc++] = linev[i];
@@ -293,13 +297,13 @@ filter_lines(void)
static void
remove_word_input()
{
- int len = strlen(input) - 1;
+ int len = strlen(input) - 1, i;
- for (int i = len; i >= 0 && isspace(input[i]); i--)
+ for (i = len; i >= 0 && isspace(input[i]); i--)
input[i] = '\0';
len = strlen(input) - 1;
- for (int i = len; i >= 0 && !isspace(input[i]); i--)
+ for (i = len; i >= 0 && !isspace(input[i]); i--)
input[i] = '\0';
filter_lines();
@@ -326,13 +330,28 @@ print_selection(void)
extern int current;
extern char **matchv, input[BUFSIZ];
- fputs("\r\033[K", stderr);
+ /* header */
+ if (opt_h && opt_s) {
+ char **match = matchv + current;
+ while (--match >= matchv) {
+ if ((*match)[0] == opt_s) {
+ fputs(*match, stdout);
+ break;
+ }
+ }
+
+ putchar('\t');
+ }
+
+ /* input or selection */
if (matchc == 0 || (opt_s && matchv[current][0] == opt_s)) {
puts(input);
} else {
puts(matchv[current]);
}
+
+ fputs("\r\033[K", stderr);
}
@@ -415,7 +434,7 @@ input_get(void)
static void
usage(void)
{
- fputs("usage: iomenu [-b] [-t] [-s] [-l lines] [-p prompt]\n", stderr);
+ fprintf(stderr, "%s [-b] [-t] [-s] [-l lines] [-p prompt]\n", argv0);
exit(EXIT_FAILURE);
}
@@ -429,13 +448,14 @@ main(int argc, char *argv[])
int exit_code;
- for (int i = 1; i < argc; i++) {
- if (argv[i][0] != '-' || strlen(argv[i]) != 2)
+ for (argv0 = argv[0], argv++, argc--; argc > 0; argv++, argc++) {
+ if ((*argv)[0] != '-' || (*argv)[1] == '\0' || (*argv)[2] != '\0')
usage();
- switch (argv[i][1]) {
+ switch ((*argv)[1]) {
case 'l':
- if (++i >= argc || sscanf(argv[i], "%d", &opt_l) <= 0)
+ argv++; argc--;
+ if (argc == 0 || sscanf(*argv, "%d", &opt_l) <= 0)
usage();
break;
@@ -443,15 +463,20 @@ main(int argc, char *argv[])
case 'b': opt_tb = 'b'; break;
case 'p':
- if (++i >= argc)
+ argc--; argv++;
+ if (argc == 0)
usage();
- opt_p = argv[i];
+ opt_p = *argv;
break;
case 's':
opt_s = '#';
break;
+ case 'h':
+ opt_h = 1;
+ break;
+
default:
usage();
}