PATCH: pws-N: function line numbers

[Peter Stephenson <pws@ibmth.df.unipi.it>]

Now line numbers work properly in functions, we can use them for printing
error messages.  To get the name of the function right, I hijacked
scriptname.  That neatly solves the problem of deciding whether the nearest
enclosing object is a sourced script or a function.

It would be sort of nice to fix this stuff in 3.0.6 too, but that means
adapting both Sven's and my previous fixes, which is a rather deathly task.

--- Src/exec.c.fnln	Thu Jun 24 10:46:29 1999
+++ Src/exec.c	Thu Jun 24 11:40:38 1999
@@ -2879,7 +2879,7 @@
 {
     char **tab, **x, *oargv0 = NULL;
     int oldzoptind, oldlastval;
-    char saveopts[OPT_SIZE];
+    char saveopts[OPT_SIZE], *oldscriptname;
     int obreaks = breaks;
 
     HEAPALLOC {
@@ -2891,6 +2891,8 @@
 	starttrapscope();
 
 	tab = pparams;
+	oldscriptname = scriptname;
+	scriptname = name;
 	oldzoptind = zoptind;
 	zoptind = 1;
 
@@ -2933,6 +2935,7 @@
 	    argzero = oargv0;
 	}
 	zoptind = oldzoptind;
+	scriptname = oldscriptname;
 	pparams = tab;
 
 	if (isset(LOCALOPTIONS)) {
--- Src/utils.c.fnln	Wed Jun 23 17:35:29 1999
+++ Src/utils.c	Thu Jun 24 11:42:42 1999
@@ -62,9 +62,10 @@
     /*
      * scriptname is set when sourcing scripts, so that we get the
      * correct name instead of the generic name of whatever
-     * program/script is running.
+     * program/script is running.  It's also set in shell functions,
+     * so test locallevel, too.
      */
-    nicezputs(isset(SHINSTDIN) ? "zsh" :
+    nicezputs((isset(SHINSTDIN) && !locallevel) ? "zsh" :
 	      scriptname ? scriptname : argzero, stderr);
     fputs(": ", stderr);
     zerrnam(NULL, fmt, str, num);
@@ -79,7 +80,7 @@
 	    return;
 	errflag = 1;
 	trashzle();
-	if(unset(SHINSTDIN)) {
+	if (unset(SHINSTDIN) || locallevel) {
 	    nicezputs(scriptname ? scriptname : argzero, stderr);
 	    fputs(": ", stderr);
 	}
@@ -133,7 +134,7 @@
 	    putc(*fmt == Meta ? *++fmt ^ 32 : *fmt, stderr);
 	    fmt++;
 	}
-    if (unset(SHINSTDIN) && lineno)
+    if ((unset(SHINSTDIN) || locallevel) && lineno)
 	fprintf(stderr, " [%ld]\n", (long)lineno);
     else
 	putc('\n', stderr);

-- 
Peter Stephenson <pws@ibmth.df.unipi.it>       Tel: +39 050 844536
WWW:  http://www.ifh.de/~pws/
Dipartimento di Fisica, Via Buonarroti 2, 56127 Pisa, Italy