[src/trunk]: src/usr.bin/make make(1): in ApplyModifier_To, update pp in each...

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

details:   https://anonhg.NetBSD.org/src/rev/9a5d0823946c
branches:  trunk
changeset: 940057:9a5d0823946c
user:      rillig <rillig%NetBSD.org@localhost>
date:      Fri Oct 02 17:42:33 2020 +0000

description:
make(1): in ApplyModifier_To, update pp in each branch

Before, the parsing position was updated once at the beginning, which
didn't make sense.  Updating it in each branch allows to decide for its
appropriate value in each branch individually.

diffstat:

 usr.bin/make/var.c |  36 ++++++++++++++++++++++--------------
 1 files changed, 22 insertions(+), 14 deletions(-)

diffs (117 lines):

diff -r 64d7e7bf9326 -r 9a5d0823946c usr.bin/make/var.c
--- a/usr.bin/make/var.c        Fri Oct 02 17:33:13 2020 +0000
+++ b/usr.bin/make/var.c        Fri Oct 02 17:42:33 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: var.c,v 1.555 2020/09/30 06:46:43 rillig Exp $ */
+/*     $NetBSD: var.c,v 1.556 2020/10/02 17:42:33 rillig Exp $ */
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -121,7 +121,7 @@
 #include    "metachar.h"
 
 /*     "@(#)var.c      8.3 (Berkeley) 3/19/94" */
-MAKE_RCSID("$NetBSD: var.c,v 1.555 2020/09/30 06:46:43 rillig Exp $");
+MAKE_RCSID("$NetBSD: var.c,v 1.556 2020/10/02 17:42:33 rillig Exp $");
 
 #define VAR_DEBUG1(fmt, arg1) DEBUG1(VAR, fmt, arg1)
 #define VAR_DEBUG2(fmt, arg1, arg2) DEBUG2(VAR, fmt, arg1, arg2)
@@ -2448,9 +2448,7 @@
 static ApplyModifierResult
 ApplyModifier_ToSep(const char **pp, ApplyModifiersState *st)
 {
-    /* XXX: pp points to the 's', for historic reasons only.
-     * Changing this will influence the error messages. */
-    const char *sep = *pp + 1;
+    const char *sep = *pp + 2;
 
     /* ":ts<any><endc>" or ":ts<any>:" */
     if (sep[0] != st->endc && (sep[1] == st->endc || sep[1] == ':')) {
@@ -2467,8 +2465,10 @@
     }
 
     /* ":ts<unrecognised><unrecognised>". */
-    if (sep[0] != '\\')
+    if (sep[0] != '\\') {
+       (*pp)++;                /* just for backwards compatibility */
        return AMR_BAD;
+    }
 
     /* ":ts\n" */
     if (sep[1] == 'n') {
@@ -2493,12 +2493,16 @@
        if (sep[1] == 'x') {
            base = 16;
            numStart++;
-       } else if (!ch_isdigit(sep[1]))
+       } else if (!ch_isdigit(sep[1])) {
+           (*pp)++;            /* just for backwards compatibility */
            return AMR_BAD;     /* ":ts<backslash><unrecognised>". */
+       }
 
        st->sep = (char)strtoul(numStart, &end, base);
-       if (*end != ':' && *end != st->endc)
+       if (*end != ':' && *end != st->endc) {
+           (*pp)++;            /* just for backwards compatibility */
            return AMR_BAD;
+       }
        *pp = end;
     }
 
@@ -2515,15 +2519,18 @@
     const char *mod = *pp;
     assert(mod[0] == 't');
 
-    *pp = mod + 1;             /* make sure it is set */
-    if (mod[1] == st->endc || mod[1] == ':' || mod[1] == '\0')
+    if (mod[1] == st->endc || mod[1] == ':' || mod[1] == '\0') {
+       *pp = mod + 1;
        return AMR_BAD;         /* Found ":t<endc>" or ":t:". */
+    }
 
     if (mod[1] == 's')
        return ApplyModifier_ToSep(pp, st);
 
-    if (mod[2] != st->endc && mod[2] != ':')
+    if (mod[2] != st->endc && mod[2] != ':') {
+       *pp = mod + 1;
        return AMR_BAD;         /* Found ":t<unrecognised><unrecognised>". */
+    }
 
     /* Check for two-character options: ":tu", ":tl" */
     if (mod[1] == 'A') {       /* absolute path */
@@ -2533,7 +2540,7 @@
        return AMR_OK;
     }
 
-    if (mod[1] == 'u') {
+    if (mod[1] == 'u') {       /* :tu */
        size_t i;
        size_t len = strlen(st->val);
        st->newVal = bmake_malloc(len + 1);
@@ -2543,7 +2550,7 @@
        return AMR_OK;
     }
 
-    if (mod[1] == 'l') {
+    if (mod[1] == 'l') {       /* :tl */
        size_t i;
        size_t len = strlen(st->val);
        st->newVal = bmake_malloc(len + 1);
@@ -2553,7 +2560,7 @@
        return AMR_OK;
     }
 
-    if (mod[1] == 'W' || mod[1] == 'w') {
+    if (mod[1] == 'W' || mod[1] == 'w') { /* :tW, :tw */
        st->oneBigWord = mod[1] == 'W';
        st->newVal = st->val;
        *pp = mod + 2;
@@ -2561,6 +2568,7 @@
     }
 
     /* Found ":t<unrecognised>:" or ":t<unrecognised><endc>". */
+    *pp = mod + 1;
     return AMR_BAD;
 }