[src/trunk]: src/usr.bin/make make(1): split EvalComparison into smaller func...

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

details:   https://anonhg.NetBSD.org/src/rev/ae58775a1741
branches:  trunk
changeset: 938594:ae58775a1741
user:      rillig <rillig%NetBSD.org@localhost>
date:      Fri Sep 11 16:37:48 2020 +0000

description:
make(1): split EvalComparison into smaller functions

diffstat:

 usr.bin/make/cond.c |  81 +++++++++++++++++++++++++++-------------------------
 1 files changed, 42 insertions(+), 39 deletions(-)

diffs (135 lines):

diff -r 574a23cd50a0 -r ae58775a1741 usr.bin/make/cond.c
--- a/usr.bin/make/cond.c       Fri Sep 11 16:23:47 2020 +0000
+++ b/usr.bin/make/cond.c       Fri Sep 11 16:37:48 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: cond.c,v 1.132 2020/09/11 16:23:47 rillig Exp $        */
+/*     $NetBSD: cond.c,v 1.133 2020/09/11 16:37:48 rillig Exp $        */
 
 /*
  * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
@@ -70,14 +70,14 @@
  */
 
 #ifndef MAKE_NATIVE
-static char rcsid[] = "$NetBSD: cond.c,v 1.132 2020/09/11 16:23:47 rillig Exp $";
+static char rcsid[] = "$NetBSD: cond.c,v 1.133 2020/09/11 16:37:48 rillig Exp $";
 #else
 #include <sys/cdefs.h>
 #ifndef lint
 #if 0
 static char sccsid[] = "@(#)cond.c     8.2 (Berkeley) 1/2/94";
 #else
-__RCSID("$NetBSD: cond.c,v 1.132 2020/09/11 16:23:47 rillig Exp $");
+__RCSID("$NetBSD: cond.c,v 1.133 2020/09/11 16:37:48 rillig Exp $");
 #endif
 #endif /* not lint */
 #endif
@@ -546,61 +546,64 @@
     return par->if_info->defProc(strlen(lhs), lhs) != par->if_info->doNot;
 }
 
-/* Evaluate a comparison, such as "${VAR} == 12345". */
+/* Evaluate a numerical comparison, such as in ".if ${VAR} >= 9". */
 static Token
-EvalComparison(const char *lhs, Boolean lhsQuoted, const char *op,
-              const char *rhs, Boolean rhsQuoted)
+EvalCompareNum(double lhs, const char *op, double rhs)
 {
-    double left, right;
-
-    if (rhsQuoted || lhsQuoted) {
-       do_string_compare:
-       if ((*op != '!' && *op != '=') || op[1] != '=') {
-           Parse_Error(PARSE_WARNING,
-                       "String comparison operator should be either == or !=");
-           return TOK_ERROR;
-       }
+    if (DEBUG(COND))
+       fprintf(debug_file, "lhs = %f, right = %f, op = %.2s\n", lhs, rhs, op);
 
-       if (DEBUG(COND)) {
-           fprintf(debug_file, "lhs = \"%s\", rhs = \"%s\", op = %.2s\n",
-                   lhs, rhs, op);
-       }
-       return (*op == '=') == (strcmp(lhs, rhs) == 0);
-    }
-
-    /*
-     * rhs is either a float or an integer. Convert both the
-     * lhs and the rhs to a double and compare the two.
-     */
-
-    if (!TryParseNumber(lhs, &left) || !TryParseNumber(rhs, &right))
-       goto do_string_compare;
-
-    if (DEBUG(COND)) {
-       fprintf(debug_file, "left = %f, right = %f, op = %.2s\n", left,
-               right, op);
-    }
     switch (op[0]) {
     case '!':
        if (op[1] != '=') {
            Parse_Error(PARSE_WARNING, "Unknown operator");
            return TOK_ERROR;
        }
-       return left != right;
+       return lhs != rhs;
     case '=':
        if (op[1] != '=') {
            Parse_Error(PARSE_WARNING, "Unknown operator");
            return TOK_ERROR;
        }
-       return left == right;
+       return lhs == rhs;
     case '<':
-       return op[1] == '=' ? left <= right : left < right;
+       return op[1] == '=' ? lhs <= rhs : lhs < rhs;
     case '>':
-       return op[1] == '=' ? left >= right : left > right;
+       return op[1] == '=' ? lhs >= rhs : lhs > rhs;
     }
     return TOK_ERROR;
 }
 
+static Token
+EvalCompareStr(const char *lhs, const char *op, const char *rhs)
+{
+    if ((*op != '!' && *op != '=') || op[1] != '=') {
+       Parse_Error(PARSE_WARNING,
+                   "String comparison operator should be either == or !=");
+       return TOK_ERROR;
+    }
+
+    if (DEBUG(COND)) {
+       fprintf(debug_file, "lhs = \"%s\", rhs = \"%s\", op = %.2s\n",
+               lhs, rhs, op);
+    }
+    return (*op == '=') == (strcmp(lhs, rhs) == 0);
+}
+
+/* Evaluate a comparison, such as "${VAR} == 12345". */
+static Token
+EvalCompare(const char *lhs, Boolean lhsQuoted, const char *op,
+           const char *rhs, Boolean rhsQuoted)
+{
+    double left, right;
+
+    if (!rhsQuoted && !lhsQuoted)
+       if (TryParseNumber(lhs, &left) && TryParseNumber(rhs, &right))
+           return EvalCompareNum(left, op, right);
+
+    return EvalCompareStr(lhs, op, rhs);
+}
+
 /* Parse a comparison condition such as:
  *
  *     0
@@ -668,7 +671,7 @@
        goto done;
     }
 
-    t = EvalComparison(lhs, lhsQuoted, op, rhs, rhsQuoted);
+    t = EvalCompare(lhs, lhsQuoted, op, rhs, rhsQuoted);
 
 done:
     free(lhsFree);