entered into RCS

1 files changed, 325 insertions, 0 deletions

diff --git a/src/tparam.c b/src/tparam.c
new file mode 100644
index 00000000000..513d0d34b91
--- /dev/null
+++ b/src/tparam.c
@@ -0,0 +1,325 @@
+/* Merge parameters into a termcap entry string.
+   Copyright (C) 1985, 1987, 1993 Free Software Foundation, Inc.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* Emacs config.h may rename various library functions such as malloc.  */
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#else /* not HAVE_CONFIG_H */
+
+#if defined(HAVE_STRING_H) || defined(STDC_HEADERS)
+#define bcopy(s, d, n) memcpy ((d), (s), (n))
+#endif
+
+#ifdef STDC_HEADERS
+#include <stdlib.h>
+#include <string.h>
+#else
+char *malloc ();
+char *realloc ();
+#endif
+
+#endif /* not HAVE_CONFIG_H */
+
+#ifndef NULL
+#define NULL (char *) 0
+#endif
+
+#ifndef emacs
+static void
+memory_out ()
+{
+  write (2, "virtual memory exhausted\n", 25);
+  exit (1);
+}
+
+static char *
+xmalloc (size)
+     unsigned size;
+{
+  register char *tem = malloc (size);
+
+  if (!tem)
+    memory_out ();
+  return tem;
+}
+
+static char *
+xrealloc (ptr, size)
+     char *ptr;
+     unsigned size;
+{
+  register char *tem = realloc (ptr, size);
+
+  if (!tem)
+    memory_out ();
+  return tem;
+}
+#endif /* not emacs */
+
+/* Assuming STRING is the value of a termcap string entry
+   containing `%' constructs to expand parameters,
+   merge in parameter values and store result in block OUTSTRING points to.
+   LEN is the length of OUTSTRING.  If more space is needed,
+   a block is allocated with `malloc'.
+
+   The value returned is the address of the resulting string.
+   This may be OUTSTRING or may be the address of a block got with `malloc'.
+   In the latter case, the caller must free the block.
+
+   The fourth and following args to tparam serve as the parameter values.  */
+
+static char *tparam1 ();
+
+/* VARARGS 2 */
+char *
+tparam (string, outstring, len, arg0, arg1, arg2, arg3)
+     char *string;
+     char *outstring;
+     int len;
+     int arg0, arg1, arg2, arg3;
+{
+#ifdef NO_ARG_ARRAY
+  int arg[4];
+  arg[0] = arg0;
+  arg[1] = arg1;
+  arg[2] = arg2;
+  arg[3] = arg3;
+  return tparam1 (string, outstring, len, NULL, NULL, arg);
+#else
+  return tparam1 (string, outstring, len, NULL, NULL, &arg0);
+#endif
+}
+
+char *BC;
+char *UP;
+
+static char tgoto_buf[50];
+
+char *
+tgoto (cm, hpos, vpos)
+     char *cm;
+     int hpos, vpos;
+{
+  int args[2];
+  if (!cm)
+    return NULL;
+  args[0] = vpos;
+  args[1] = hpos;
+  return tparam1 (cm, tgoto_buf, 50, UP, BC, args);
+}
+
+static char *
+tparam1 (string, outstring, len, up, left, argp)
+     char *string;
+     char *outstring;
+     int len;
+     char *up, *left;
+     register int *argp;
+{
+  register int c;
+  register char *p = string;
+  register char *op = outstring;
+  char *outend;
+  int outlen = 0;
+
+  register int tem;
+  int *old_argp = argp;
+  int doleft = 0;
+  int doup = 0;
+
+  outend = outstring + len;
+
+  while (1)
+    {
+      /* If the buffer might be too short, make it bigger.  */
+      if (op + 5 >= outend)
+        {
+          register char *new;
+          if (outlen == 0)
+            {
+              outlen = len + 40;
+              new = (char *) xmalloc (outlen);
+              outend += 40;
+              bcopy (outstring, new, op - outstring);
+            }
+          else
+            {
+              outend += outlen;
+              outlen *= 2;
+              new = (char *) xrealloc (outstring, outlen);
+            }
+          op += new - outstring;
+          outend += new - outstring;
+          outstring = new;
+        }
+      c = *p++;
+      if (!c)
+        break;
+      if (c == '%')
+        {
+          c = *p++;
+          tem = *argp;
+          switch (c)
+            {
+            case 'd':           /* %d means output in decimal.  */
+              if (tem < 10)
+                goto onedigit;
+              if (tem < 100)
+                goto twodigit;
+            case '3':           /* %3 means output in decimal, 3 digits.  */
+              if (tem > 999)
+                {
+                  *op++ = tem / 1000 + '0';
+                  tem %= 1000;
+                }
+              *op++ = tem / 100 + '0';
+            case '2':           /* %2 means output in decimal, 2 digits.  */
+            twodigit:
+              tem %= 100;
+              *op++ = tem / 10 + '0';
+            onedigit:
+              *op++ = tem % 10 + '0';
+              argp++;
+              break;
+
+            case 'C':
+              /* For c-100: print quotient of value by 96, if nonzero,
+                 then do like %+.  */
+              if (tem >= 96)
+                {
+                  *op++ = tem / 96;
+                  tem %= 96;
+                }
+            case '+':           /* %+x means add character code of char x.  */
+              tem += *p++;
+            case '.':           /* %. means output as character.  */
+              if (left)
+                {
+                  /* If want to forbid output of 0 and \n and \t,
+                     and this is one of them, increment it.  */
+                  while (tem == 0 || tem == '\n' || tem == '\t')
+                    {
+                      tem++;
+                      if (argp == old_argp)
+                        doup++, outend -= strlen (up);
+                      else
+                        doleft++, outend -= strlen (left);
+                    }
+                }
+              *op++ = tem ? tem : 0200;
+            case 'f':           /* %f means discard next arg.  */
+              argp++;
+              break;
+
+            case 'b':           /* %b means back up one arg (and re-use it).  */
+              argp--;
+              break;
+
+            case 'r':           /* %r means interchange following two args.  */
+              argp[0] = argp[1];
+              argp[1] = tem;
+              old_argp++;
+              break;
+
+            case '>':           /* %>xy means if arg is > char code of x, */
+              if (argp[0] > *p++) /* then add char code of y to the arg, */
+                argp[0] += *p;  /* and in any case don't output.  */
+              p++;              /* Leave the arg to be output later.  */
+              break;
+
+            case 'a':           /* %a means arithmetic.  */
+              /* Next character says what operation.
+                 Add or subtract either a constant or some other arg.  */
+              /* First following character is + to add or - to subtract
+                 or = to assign.  */
+              /* Next following char is 'p' and an arg spec
+                 (0100 plus position of that arg relative to this one)
+                 or 'c' and a constant stored in a character.  */
+              tem = p[2] & 0177;
+              if (p[1] == 'p')
+                tem = argp[tem - 0100];
+              if (p[0] == '-')
+                argp[0] -= tem;
+              else if (p[0] == '+')
+                argp[0] += tem;
+              else if (p[0] == '*')
+                argp[0] *= tem;
+              else if (p[0] == '/')
+                argp[0] /= tem;
+              else
+                argp[0] = tem;
+
+              p += 3;
+              break;
+
+            case 'i':           /* %i means add one to arg, */
+              argp[0] ++;       /* and leave it to be output later.  */
+              argp[1] ++;       /* Increment the following arg, too!  */
+              break;
+
+            case '%':           /* %% means output %; no arg.  */
+              goto ordinary;
+
+            case 'n':           /* %n means xor each of next two args with 140.  */
+              argp[0] ^= 0140;
+              argp[1] ^= 0140;
+              break;
+
+            case 'm':           /* %m means xor each of next two args with 177.  */
+              argp[0] ^= 0177;
+              argp[1] ^= 0177;
+              break;
+
+            case 'B':           /* %B means express arg as BCD char code.  */
+              argp[0] += 6 * (tem / 10);
+              break;
+
+            case 'D':           /* %D means weird Delta Data transformation.  */
+              argp[0] -= 2 * (tem % 16);
+              break;
+            }
+        }
+      else
+        /* Ordinary character in the argument string.  */
+      ordinary:
+        *op++ = c;
+    }
+  *op = 0;
+  while (doup-- > 0)
+    strcat (op, up);
+  while (doleft-- > 0)
+    strcat (op, left);
+  return outstring;
+}
+
+#ifdef DEBUG
+
+main (argc, argv)
+     int argc;
+     char **argv;
+{
+  char buf[50];
+  int args[3];
+  args[0] = atoi (argv[2]);
+  args[1] = atoi (argv[3]);
+  args[2] = atoi (argv[4]);
+  tparam1 (argv[1], buf, "LEFT", "UP", args);
+  printf ("%s\n", buf);
+  return 0;
+}
+
+#endif /* DEBUG */