add prototype for command parsing - st - simple terminal
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---
DIR commit d61a2a8fce2638594644feb664ce04398825b0f3
DIR parent 240411e7d08006f181afbf70930f748d7585ce85
HTML Author: Matthias-Christian Ott <ott@enolink.de>
Date: Thu, 7 Aug 2008 10:38:54 +0200
add prototype for command parsing
Diffstat:
M std.c | 81 +++++++++++++++++++------------
1 file changed, 50 insertions(+), 31 deletions(-)
---
DIR diff --git a/std.c b/std.c
@@ -18,19 +18,6 @@
#define MAX(a,b) (((a) > (b)) ? (a) : (b))
#define MIN(a,b) (((a) < (b)) ? (a) : (b))
-static void buffer(char c);
-static void cmd(const char *cmdstr, ...);
-static int getch();
-static void getpty(void);
-static void movea(int x, int y);
-static void mover(int x, int y);
-static void parseesc(void);
-static void scroll(int l);
-static void shell(void);
-static void sigchld(int n);
-static char unbuffer(void);
-static void ungetch(int c);
-
typedef struct {
unsigned char data[BUFSIZ];
int s, e;
@@ -40,8 +27,23 @@ typedef struct {
typedef struct {
unsigned char data[BUFSIZ];
int i, n;
+ int fd;
} ReadBuffer;
+static void buffer(char c);
+static void cmd(const char *cmdstr, ...);
+static int getch(ReadBuffer *buf);
+static void getpty(void);
+static void movea(int x, int y);
+static void mover(int x, int y);
+static void parsecmd(void);
+static void parseesc(void);
+static void scroll(int l);
+static void shell(void);
+static void sigchld(int n);
+static char unbuffer(void);
+static void ungetch(ReadBuffer *buf, int c);
+
static int cols = 80, lines = 25;
static int cx = 0, cy = 0;
static int c;
@@ -49,7 +51,7 @@ static int ptm, pts;
static _Bool bold, digit, qmark;
static pid_t pid;
static RingBuffer buf;
-static ReadBuffer rbuf;
+static ReadBuffer cmdbuf, ptmbuf;
void
buffer(char c) {
@@ -73,14 +75,14 @@ cmd(const char *cmdstr, ...) {
}
int
-getch() {
- if(rbuf.i++ >= rbuf.n) {
- rbuf.n = read(ptm, rbuf.data, LENGTH(rbuf.data));
- if(rbuf.n == -1)
- err(EXIT_FAILURE, "cannot read from slave pty");
- rbuf.i = 0;
+getch(ReadBuffer *buf) {
+ if(buf->i++ >= buf->n) {
+ buf->n = read(buf->fd, buf->data, BUFSIZ);
+ if(buf->n == -1)
+ err(EXIT_FAILURE, "cannot read");
+ buf->i = 0;
}
- return rbuf.data[rbuf.i];
+ return buf->data[buf->i];
}
void
@@ -98,15 +100,19 @@ mover(int x, int y) {
}
void
+parsecmd(void) {
+}
+
+void
parseesc(void) {
int i, j;
int arg[16];
memset(arg, 0, LENGTH(arg));
- c = getch();
+ c = getch(&ptmbuf);
switch(c) {
case '[':
- c = getch();
+ c = getch(&ptmbuf);
for(j = 0; j < LENGTH(arg);) {
if(isdigit(c)) {
digit = 1;
@@ -128,7 +134,7 @@ parseesc(void) {
}
break;
}
- c = getch();
+ c = getch(&ptmbuf);
}
switch(c) {
case '@':
@@ -202,7 +208,7 @@ parseesc(void) {
break;
default:
putchar('\033');
- ungetch(c);
+ ungetch(&ptmbuf, c);
}
}
@@ -291,10 +297,10 @@ unbuffer(void) {
}
void
-ungetch(int c) {
- if(rbuf.i + 1 >= rbuf.n)
- errx(EXIT_FAILURE, "read buffer full");
- rbuf.data[rbuf.i++] = c;
+ungetch(ReadBuffer *buf, int c) {
+ if(buf->i + 1 >= buf->n)
+ errx(EXIT_FAILURE, "buffer full");
+ buf->data[buf->i++] = c;
}
int
@@ -307,15 +313,28 @@ main(int argc, char *argv[]) {
errx(EXIT_FAILURE, "usage: std [-v]");
getpty();
shell();
+ cmdbuf.fd = STDIN_FILENO;
+ ptmbuf.fd = ptm;
FD_ZERO(&rfds);
FD_SET(STDIN_FILENO, &rfds);
FD_SET(ptm, &rfds);
for(;;) {
if(select(ptm + 1, &rfds, NULL, NULL, NULL) == -1)
err(EXIT_FAILURE, "cannot select");
+ if(FD_ISSET(STDIN_FILENO, &rfds))
+ do {
+ c = getch(&cmdbuf);
+ switch(c) {
+ case ':':
+ parsecmd();
+ break;
+ default:
+ break;
+ }
+ } while(cmdbuf.i < cmdbuf.n);
if(FD_ISSET(ptm, &rfds)) {
do {
- c = getch();
+ c = getch(&ptmbuf);
switch(c) {
case '\033':
parseesc();
@@ -323,7 +342,7 @@ main(int argc, char *argv[]) {
default:
putchar(c);
}
- } while(rbuf.i < rbuf.n);
+ } while(ptmbuf.i < ptmbuf.n);
fflush(stdout);
}
}