[src/trunk]: src/usr.bin/make make(1): make code for the :E and :R modifiers ...

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

details:   https://anonhg.NetBSD.org/src/rev/9333e2ce314f
branches:  trunk
changeset: 973529:9333e2ce314f
user:      rillig <rillig%NetBSD.org@localhost>
date:      Fri Jul 03 15:42:43 2020 +0000

description:
make(1): make code for the :E and :R modifiers simpler

diffstat:

 usr.bin/make/var.c |  88 +++++++++++------------------------------------------
 1 files changed, 18 insertions(+), 70 deletions(-)

diffs (128 lines):

diff -r f42d38f20a40 -r 9333e2ce314f usr.bin/make/var.c
--- a/usr.bin/make/var.c        Fri Jul 03 15:41:37 2020 +0000
+++ b/usr.bin/make/var.c        Fri Jul 03 15:42:43 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: var.c,v 1.238 2020/07/03 15:24:31 rillig Exp $ */
+/*     $NetBSD: var.c,v 1.239 2020/07/03 15:42:43 rillig Exp $ */
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -69,14 +69,14 @@
  */
 
 #ifndef MAKE_NATIVE
-static char rcsid[] = "$NetBSD: var.c,v 1.238 2020/07/03 15:24:31 rillig Exp $";
+static char rcsid[] = "$NetBSD: var.c,v 1.239 2020/07/03 15:42:43 rillig Exp $";
 #else
 #include <sys/cdefs.h>
 #ifndef lint
 #if 0
 static char sccsid[] = "@(#)var.c      8.3 (Berkeley) 3/19/94";
 #else
-__RCSID("$NetBSD: var.c,v 1.238 2020/07/03 15:24:31 rillig Exp $");
+__RCSID("$NetBSD: var.c,v 1.239 2020/07/03 15:42:43 rillig Exp $");
 #endif
 #endif /* not lint */
 #endif
@@ -1203,86 +1203,34 @@
     return TRUE;
 }
 
-/*-
- *-----------------------------------------------------------------------
- * VarSuffix --
- *     Place the suffix of the given word in the given buffer.
- *
- * Input:
- *     word            Word to trim
- *     addSpace        TRUE if need to add a space before placing the
- *                     suffix in the buffer
- *     buf             Buffer in which to store it
- *
- * Results:
- *     TRUE if characters were added to the buffer (a space needs to be
- *     added to the buffer before the next word).
- *
- * Side Effects:
- *     The suffix from the word is placed in the buffer.
- *
- *-----------------------------------------------------------------------
- */
+/* Add the filename suffix of the given word to the buffer. */
 static Boolean
 VarSuffix(GNode *ctx MAKE_ATTR_UNUSED, Var_Parse_State *vpstate,
          char *word, Boolean addSpace, Buffer *buf,
          void *dummy MAKE_ATTR_UNUSED)
 {
-    char *dot;
-
-    dot = strrchr(word, '.');
-    if (dot != NULL) {
-       if (addSpace && vpstate->varSpace) {
-           Buf_AddByte(buf, vpstate->varSpace);
-       }
-       *dot++ = '\0';
-       Buf_AddBytes(buf, strlen(dot), dot);
-       dot[-1] = '.';
-       addSpace = TRUE;
-    }
-    return addSpace;
+    const char *dot = strrchr(word, '.');
+    if (dot == NULL)
+       return FALSE;
+
+    if (addSpace && vpstate->varSpace)
+       Buf_AddByte(buf, vpstate->varSpace);
+    Buf_AddBytes(buf, strlen(dot + 1), dot + 1);
+    return TRUE;
 }
 
-/*-
- *-----------------------------------------------------------------------
- * VarRoot --
- *     Remove the suffix of the given word and place the result in the
- *     buffer.
- *
- * Input:
- *     word            Word to trim
- *     addSpace        TRUE if need to add a space to the buffer
- *                     before placing the root in it
- *     buf             Buffer in which to store it
- *
- * Results:
- *     TRUE if characters were added to the buffer (a space needs to be
- *     added to the buffer before the next word).
- *
- * Side Effects:
- *     The trimmed word is added to the buffer.
- *
- *-----------------------------------------------------------------------
- */
+/* Add the filename basename of the given word to the buffer. */
 static Boolean
 VarRoot(GNode *ctx MAKE_ATTR_UNUSED, Var_Parse_State *vpstate,
        char *word, Boolean addSpace, Buffer *buf,
        void *dummy MAKE_ATTR_UNUSED)
 {
-    char *dot;
-
-    if (addSpace && vpstate->varSpace) {
+    char *dot = strrchr(word, '.');
+    size_t len = dot != NULL ? dot - word : strlen(word);
+
+    if (addSpace && vpstate->varSpace)
        Buf_AddByte(buf, vpstate->varSpace);
-    }
-
-    dot = strrchr(word, '.');
-    if (dot != NULL) {
-       *dot = '\0';
-       Buf_AddBytes(buf, strlen(word), word);
-       *dot = '.';
-    } else {
-       Buf_AddBytes(buf, strlen(word), word);
-    }
+    Buf_AddBytes(buf, len, word);
     return TRUE;
 }