(tparam1): Add handling for `%pN', which

means use param N for the next substitution.

1 files changed, 11 insertions, 3 deletions

diff --git a/src/tparam.c b/src/tparam.c
index 7306e0d5c10..ea208692161 100644
--- a/src/tparam.c
+++ b/src/tparam.c
@@ -144,7 +144,9 @@ tparam1 (string, outstring, len, up, left, argp)
   int outlen = 0;
 
   register int tem;
-  int *old_argp = argp;
+  int *old_argp = argp;                 /* can move */
+  int *fixed_argp = argp;               /* never moves */
+  int explicit_param_p = 0;             /* set by %p */
   int doleft = 0;
   int doup = 0;
 
@@ -180,7 +182,10 @@ tparam1 (string, outstring, len, up, left, argp)
       if (c == '%')
         {
           c = *p++;
-          tem = *argp;
+          if (explicit_param_p)
+            explicit_param_p = 0;
+          else
+            tem = *argp;
           switch (c)
             {
             case 'd':           /* %d means output in decimal.  */
@@ -203,7 +208,10 @@ tparam1 (string, outstring, len, up, left, argp)
               *op++ = tem % 10 + '0';
               argp++;
               break;
-
+            case 'p':           /* %pN means use param N for next subst.  */
+              tem = fixed_argp[(*p++) - '1'];
+              explicit_param_p = 1;
+              break;
             case 'C':
               /* For c-100: print quotient of value by 96, if nonzero,
                  then do like %+.  */