[src/trunk]: src/usr.bin/make make(1): split CondParser_Comparison into 2 parts

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

details:   https://anonhg.NetBSD.org/src/rev/6f0da731492a
branches:  trunk
changeset: 954809:6f0da731492a
user:      rillig <rillig%NetBSD.org@localhost>
date:      Fri Sep 11 13:58:45 2020 +0000

description:
make(1): split CondParser_Comparison into 2 parts

diffstat:

 usr.bin/make/cond.c |  148 ++++++++++++++++++++++++++--------------------------
 1 files changed, 74 insertions(+), 74 deletions(-)

diffs (196 lines):

diff -r 022a86cd593a -r 6f0da731492a usr.bin/make/cond.c
--- a/usr.bin/make/cond.c       Fri Sep 11 12:50:14 2020 +0000
+++ b/usr.bin/make/cond.c       Fri Sep 11 13:58:45 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: cond.c,v 1.129 2020/09/11 07:09:40 rillig Exp $        */
+/*     $NetBSD: cond.c,v 1.130 2020/09/11 13:58:45 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 1.129 2020/09/11 07:09:40 rillig Exp $";
+static char rcsid[] = "$NetBSD: cond.c,v 1.130 2020/09/11 13:58:45 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 1.129 2020/09/11 07:09:40 rillig Exp $");
+__RCSID("$NetBSD: cond.c,v 1.130 2020/09/11 13:58:45 rillig Exp $");
 #endif
 #endif /* not lint */
 #endif
@@ -523,6 +523,70 @@
     { NULL,    0, FALSE, NULL }
 };
 
+static Token
+EvalComparison(const char *lhs, Boolean lhsQuoted, const char *op,
+              const char *rhs, Boolean rhsQuoted)
+{
+    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 = \"%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;
+    case '=':
+       if (op[1] != '=') {
+           Parse_Error(PARSE_WARNING,
+                       "Unknown operator");
+           return TOK_ERROR;
+       }
+       return left == right;
+    case '<':
+       if (op[1] == '=') {
+           return left <= right;
+       } else {
+           return left < right;
+       }
+    case '>':
+       if (op[1] == '=') {
+           return left >= right;
+       } else {
+           return left > right;
+       }
+    }
+    return TOK_ERROR;
+}
+
 /* Parse a comparison condition such as:
  *
  *     0
@@ -541,7 +605,6 @@
     void *rhsFree;
     Boolean lhsQuoted;
     Boolean rhsQuoted;
-    double left, right;
 
     t = TOK_ERROR;
     rhs = NULL;
@@ -586,9 +649,12 @@
            goto done;
        }
        /* For .ifxxx <number> compare against zero */
-       if (TryParseNumber(lhs, &left)) {
-           t = left != 0.0;
-           goto done;
+       {
+           double left;
+           if (TryParseNumber(lhs, &left)) {
+               t = left != 0.0;
+               goto done;
+           }
        }
        /* For .if ${...} check for non-empty string (defProc is ifdef). */
        if (par->if_info->form[0] == '\0') {
@@ -617,73 +683,7 @@
        goto done;
     }
 
-    if (rhsQuoted || lhsQuoted) {
-    do_string_compare:
-       if (((*op != '!') && (*op != '=')) || (op[1] != '=')) {
-           Parse_Error(PARSE_WARNING,
-                       "String comparison operator should be either == or !=");
-           goto done;
-       }
-
-       if (DEBUG(COND)) {
-           fprintf(debug_file, "lhs = \"%s\", rhs = \"%s\", op = %.2s\n",
-                   lhs, rhs, op);
-       }
-       /*
-        * Null-terminate rhs and perform the comparison.
-        * t is set to the result.
-        */
-       if (*op == '=') {
-           t = strcmp(lhs, rhs) == 0;
-       } else {
-           t = strcmp(lhs, rhs) != 0;
-       }
-    } else {
-       /*
-        * 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");
-               goto done;
-           }
-           t = (left != right);
-           break;
-       case '=':
-           if (op[1] != '=') {
-               Parse_Error(PARSE_WARNING,
-                           "Unknown operator");
-               goto done;
-           }
-           t = (left == right);
-           break;
-       case '<':
-           if (op[1] == '=') {
-               t = (left <= right);
-           } else {
-               t = (left < right);
-           }
-           break;
-       case '>':
-           if (op[1] == '=') {
-               t = (left >= right);
-           } else {
-               t = (left > right);
-           }
-           break;
-       }
-    }
+    t = EvalComparison(lhs, lhsQuoted, op, rhs, rhsQuoted);
 
 done:
     free(lhsFree);