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[st.git] / std.c

diff --git a/std.c b/std.c
index 4afdc3c..3fd07a4 100644 (file)
--- a/std.c
+++ b/std.c
@@ -1,3 +1,4 @@
+/* See LICENSE file for copyright and license details. */
 #include <sys/ioctl.h>
 #include <sys/select.h>
 #include <sys/stat.h>
@@ -25,14 +26,12 @@ void eprintn(const char *errstr, ...);
 void getpty(void);
 void movea(int x, int y);
 void mover(int x, int y);
-void parse(void);
+void parseesc(void);
 void scroll(int l);
 void shell(void);
 void sigchld(int n);
 char unbuffer(void);
 
-enum { QuestionMark = 1, Digit = 2 };
-
 typedef struct {
        unsigned char data[BUFSIZ];
        int s, e;
@@ -41,10 +40,10 @@ typedef struct {
 
 int cols = 80, lines = 25;
 int cx = 0, cy = 0;
-int c, s;
+int c;
 FILE *fptm = NULL;
 int ptm, pts;
-_Bool bold;
+_Bool bold, digit, qmark;
 pid_t pid;
 RingBuffer buf;
 
@@ -99,38 +98,6 @@ eprintn(const char *errstr, ...) {
        exit(EXIT_FAILURE);
 }
 
-void
-getpty(void) {
-       char *ptsdev;
-
-#if defined(_GNU_SOURCE)
-       ptm = getpt();
-#elif _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600
-       ptm = posix_openpt(O_RDWR);
-#else
-       ptm = open("/dev/ptmx", O_RDWR);
-       if(ptm == -1)
-               if(openpty(&ptm, &pts, NULL, NULL, NULL) == -1)
-                       eprintn("error, cannot open pty");
-#endif
-#if defined(_XOPEN_SOURCE)
-       if(ptm != -1) {
-               if(grantpt(ptm) == -1)
-                       eprintn("error, cannot grant access to pty");
-               if(unlockpt(ptm) == -1)
-                       eprintn("error, cannot unlock pty");
-               ptsdev = ptsname(ptm);
-               if(!ptsdev)
-                       eprintn("error, slave pty name undefined");
-               pts = open(ptsdev, O_RDWR);
-               if(pts == -1)
-                       eprintn("error, cannot open slave pty");
-       }
-       else
-               eprintn("error, cannot open pty");
-#endif
-}
-
 void
 movea(int x, int y) {
        x = MAX(x, cols);
@@ -151,28 +118,27 @@ parseesc(void) {
        int arg[16];
 
        memset(arg, 0, LENGTH(arg));
-       s = 0;
        c = getc(fptm);
        switch(c) {
        case '[':
                c = getc(fptm);
                for(j = 0; j < LENGTH(arg);) {
                        if(isdigit(c)) {
-                               s |= Digit;
+                               digit = 1;
                                arg[j] *= 10;
                                arg[j] += c - '0';
                        }
                        else if(c == '?')
-                               s |= QuestionMark; 
+                               qmark = 1;
                        else if(c == ';') {
-                               if(!(s & Digit))
+                               if(!digit)
                                        eprint("syntax error\n");
-                               s &= ~Digit;
+                               digit = 0;
                                j++;
                        }
                        else {
-                               if(s & Digit) {
-                                       s &= ~Digit;
+                               if(digit) {
+                                       digit = 0;
                                        j++;
                                }
                                break;
@@ -309,12 +275,24 @@ unbuffer(void) {
 
 int
 main(int argc, char *argv[]) {
-       fd_set rd;
        if(argc == 2 && !strcmp("-v", argv[1]))
                eprint("std-"VERSION", © 2008 Matthias-Christian Ott\n");
        else if(argc == 1)
                eprint("usage: st [-v]\n");
        getpty();
        shell();
+       fptm = fdopen(ptm, "r+");
+       if(!fptm)
+               eprintn("cannot open slave pty");
+       for(;;) {
+               c = getc(fptm);
+               switch(c) {
+               case '\033':
+                       parseesc();
+                       break;
+               default:
+                       putchar(c);
+               }
+       }
        return 0;
 }