BSD 3 development

Work on file usr/src/cmd/colcrt.c

Synthesized-from: 3bsd

diff --git a/usr/src/cmd/colcrt.c b/usr/src/cmd/colcrt.c
new file mode 100644 (file)
index 0000000..81e509f
--- /dev/null
+++ b/usr/src/cmd/colcrt.c
@@ -0,0 +1,233 @@
+#include <stdio.h>
+/*
+ * colcrt - replaces col for crts with new nroff esp. when using tbl.
+ * Bill Joy UCB July 14, 1977
+ *
+ * This filter uses a screen buffer, 267 half-lines by 132 columns.
+ * It interprets the up and down sequences generated by the new
+ * nroff when used with tbl and by \u \d and \r.
+ * General overstriking doesn't work correctly.
+ * Underlining is split onto multiple lines, etc.
+ *
+ * Option - suppresses all underlining.
+ * Option -2 forces printing of all half lines.
+ */
+
+char   page[267][132];
+
+int    outline = 1;
+int    outcol;
+
+char   buf[256];
+char   suppresul;
+char   printall;
+
+char   *progname;
+FILE   *f;
+
+main(argc, argv)
+       int argc;
+       char *argv[];
+{
+       register c;
+       register char *cp, *dp;
+
+       argc--;
+       progname = *argv++;
+       while (argc > 0 && argv[0][0] == '-') {
+               switch (argv[0][1]) {
+                       case 0:
+                               suppresul = 1;
+                               break;
+                       case '2':
+                               printall = 1;
+                               break;
+                       default:
+                               printf("usage: %s [ - ] [ -2 ] [ file ... ]\n", progname);
+                               fflush(stdout);
+                               exit(1);
+               }
+               argc--;
+               argv++;
+       }
+       setbuf(stdout, buf);
+       do {
+               if (argc > 0) {
+                       close(0);
+                       if ((f=fopen(argv[0], "r")
+) < 0) {
+                               fflush(stdout);
+                               perror(argv[0]);
+                               fflush(stdout);
+                               exit (1);
+                       }
+                       argc--;
+                       argv++;
+               }
+               for (;;) {
+                       c = getc(stdin);
+                       if (c == -1) {
+                               pflush(outline);
+                               fflush(stdout);
+                               break;
+                       }
+                       switch (c) {
+                               case '\n':
+                                       if (outline >= 265)
+                                               pflush(62);
+                                       outline += 2;
+                                       outcol = 0;
+                                       continue;
+                               case '\016':
+                                       case '\017':
+                                       continue;
+                               case 033:
+                                       c = getc(stdin);
+                                       switch (c) {
+                                               case '9':
+                                                       if (outline >= 266)
+                                                               pflush(62);
+                                                       outline++;
+                                                       continue;
+                                               case '8':
+                                                       if (outline >= 1)
+                                                               outline--;
+                                                       continue;
+                                               case '7':
+                                                       outline -= 2;
+                                                       if (outline < 0)
+                                                               outline = 0;
+                                                       continue;
+                                               default:
+                                                       continue;
+                                       }
+                               case '\b':
+                                       if (outcol)
+                                               outcol--;
+                                       continue;
+                               case '\t':
+                                       outcol += 8;
+                                       outcol &= ~7;
+                                       outcol--;
+                                       c = ' ';
+                               default:
+                                       if (outcol >= 132) {
+                                               outcol++;
+                                               continue;
+                                       }
+                                       cp = &page[outline][outcol];
+                                       outcol++;
+                                       if (c == '_') {
+                                               if (suppresul)
+                                                       continue;
+                                               cp += 132;
+                                               c = '-';
+                                       }
+                                       if (*cp == 0) {
+                                               *cp = c;
+                                               dp = cp - outcol;
+                                               for (cp--; cp >= dp && *cp == 0; cp--)
+                                                       *cp = ' ';
+                                       } else
+                                               if (plus(c, *cp) || plus(*cp, c))
+                                                       *cp = '+';
+                                               else if (*cp == ' ' || *cp == 0)
+                                                       *cp = c;
+                                       continue;
+                       }
+               }
+       } while (argc > 0);
+       fflush(stdout);
+       exit(0);
+}
+
+plus(c, d)
+       char c, d;
+{
+
+       return (c == '|' && d == '-' || d == '_');
+}
+
+int first;
+
+pflush(ol)
+       int ol;
+{
+       register int i, j;
+       register char *cp;
+       char lastomit;
+       int l;
+
+       l = ol;
+       lastomit = 0;
+       if (l > 266)
+               l = 266;
+       else
+               l |= 1;
+       for (i = first | 1; i < l; i++) {
+               move(i, i - 1);
+               move(i, i + 1);
+       }
+       for (i = first; i < l; i++) {
+               cp = page[i];
+               if (printall == 0 && lastomit == 0 && *cp == 0) {
+                       lastomit = 1;
+                       continue;
+               }
+               lastomit = 0;
+               printf("%s\n", cp);
+       }
+       copy(page, page[ol], (267 - ol) * 132);
+       clear(page[267- ol], ol * 132);
+       outline -= ol;
+       outcol = 0;
+       first = 1;
+}
+move(l, m)
+       int l, m;
+{
+       register char *cp, *dp;
+
+       for (cp = page[l], dp = page[m]; *cp; cp++, dp++) {
+               switch (*cp) {
+                       case '|':
+                               if (*dp != ' ' && *dp != '|' && *dp != 0)
+                                       return;
+                               break;
+                       case ' ':
+                               break;
+                       default:
+                               return;
+               }
+       }
+       if (*cp == 0) {
+               for (cp = page[l], dp = page[m]; *cp; cp++, dp++)
+                       if (*cp == '|')
+                               *dp = '|';
+                       else if (*dp == 0)
+                               *dp = ' ';
+               page[l][0] = 0;
+       }
+}
+
+copy(to, from, i)
+       register char *to, *from;
+       register int i;
+{
+
+       if (i > 0)
+               do
+                       *to++ = *from++;
+               while (--i);
+}
+
+clear(at, cnt)
+       register char *at;
+       register int cnt;
+{
+
+       if (cnt > 0)
+               do
+                       *at++ = 0;
+               while (--cnt);
+}