[src/trunk]: src/usr.bin/make make(1): extract ParseForLoop from ParseReadLine

[rillig <rillig%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b364465b37bd
branches:  trunk
changeset: 979202:b364465b37bd
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sat Dec 19 17:49:11 2020 +0000

description:
make(1): extract ParseForLoop from ParseReadLine

diffstat:

 usr.bin/make/parse.c |  62 ++++++++++++++++++++++++++++-----------------------
 1 files changed, 34 insertions(+), 28 deletions(-)

diffs (98 lines):

diff -r 17ac9718c232 -r b364465b37bd usr.bin/make/parse.c
--- a/usr.bin/make/parse.c      Sat Dec 19 16:05:33 2020 +0000
+++ b/usr.bin/make/parse.c      Sat Dec 19 17:49:11 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: parse.c,v 1.499 2020/12/19 16:05:33 rillig Exp $       */
+/*     $NetBSD: parse.c,v 1.500 2020/12/19 17:49:11 rillig Exp $       */
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -117,7 +117,7 @@
 #include "pathnames.h"
 
 /*     "@(#)parse.c    8.3 (Berkeley) 3/19/94" */
-MAKE_RCSID("$NetBSD: parse.c,v 1.499 2020/12/19 16:05:33 rillig Exp $");
+MAKE_RCSID("$NetBSD: parse.c,v 1.500 2020/12/19 17:49:11 rillig Exp $");
 
 /* types and constants */
 
@@ -2864,6 +2864,35 @@
        return line;
 }
 
+static Boolean
+ParseForLoop(const char *line)
+{
+       int rval;
+       int firstLineno;
+
+       rval = For_Eval(line);
+       if (rval == 0)
+               return FALSE;   /* Not a .for line */
+       if (rval < 0)
+               return TRUE;    /* Syntax error - error printed, ignore line */
+
+       firstLineno = CurFile()->lineno;
+
+       /* Accumulate loop lines until matching .endfor */
+       do {
+               line = ParseGetLine(GLM_FOR_BODY);
+               if (line == NULL) {
+                       Parse_Error(PARSE_FATAL,
+                           "Unexpected end of file in for loop.");
+                       break;
+               }
+       } while (For_Accum(line));
+
+       For_Run(firstLineno);   /* Stash each iteration as a new 'input file' */
+
+       return TRUE;            /* Read next line from for-loop buffer */
+}
+
 /*
  * Read an entire line from the input file.
  *
@@ -2878,9 +2907,7 @@
 static char *
 ParseReadLine(void)
 {
-       char *line;             /* Result */
-       int lineno;             /* Saved line # */
-       int rval;
+       char *line;
 
        for (;;) {
                line = ParseGetLine(GLM_NONEMPTY);
@@ -2919,30 +2946,9 @@
                case COND_PARSE:
                        continue;
                case COND_INVALID:      /* Not a conditional line */
-                       /* Check for .for loops */
-                       rval = For_Eval(line);
-                       if (rval == 0)
-                               /* Not a .for line */
-                               break;
-                       if (rval < 0)
-                               /* Syntax error - error printed, ignore line */
+                       if (ParseForLoop(line))
                                continue;
-                       /* Start of a .for loop */
-                       lineno = CurFile()->lineno;
-                       /* Accumulate loop lines until matching .endfor */
-                       do {
-                               line = ParseGetLine(GLM_FOR_BODY);
-                               if (line == NULL) {
-                                       Parse_Error(PARSE_FATAL,
-                                           "Unexpected end of file "
-                                           "in for loop.");
-                                       break;
-                               }
-                       } while (For_Accum(line));
-                       /* Stash each iteration as a new 'input file' */
-                       For_Run(lineno);
-                       /* Read next line from for-loop buffer */
-                       continue;
+                       break;
                }
                return line;
        }