[src/trunk]: src/usr.bin/make make: reduce redundant code around ModifyWords

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

details:   https://anonhg.NetBSD.org/src/rev/41812ff3bb88
branches:  trunk
changeset: 980684:41812ff3bb88
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sun Feb 14 21:54:42 2021 +0000

description:
make: reduce redundant code around ModifyWords

The result of ModifyWords had been passed to Expr_SetValueOwn in all
cases.  The last argument to ModifyWords had always been st->sep.

diffstat:

 usr.bin/make/var.c |  120 ++++++++++++++++++++++++----------------------------
 1 files changed, 55 insertions(+), 65 deletions(-)

diffs (204 lines):

diff -r 12ad30f4ab86 -r 41812ff3bb88 usr.bin/make/var.c
--- a/usr.bin/make/var.c        Sun Feb 14 21:32:58 2021 +0000
+++ b/usr.bin/make/var.c        Sun Feb 14 21:54:42 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: var.c,v 1.819 2021/02/14 20:22:30 rillig Exp $ */
+/*     $NetBSD: var.c,v 1.820 2021/02/14 21:54:42 rillig Exp $ */
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -139,7 +139,7 @@
 #include "metachar.h"
 
 /*     "@(#)var.c      8.3 (Berkeley) 3/19/94" */
-MAKE_RCSID("$NetBSD: var.c,v 1.819 2021/02/14 20:22:30 rillig Exp $");
+MAKE_RCSID("$NetBSD: var.c,v 1.820 2021/02/14 21:54:42 rillig Exp $");
 
 typedef enum VarFlags {
        VAR_NONE        = 0,
@@ -1783,50 +1783,6 @@
        SepBuf_AddStr(buf, word);
 }
 
-/*
- * Modify each of the words of the passed string using the given function.
- *
- * Input:
- *     str             String whose words should be modified
- *     modifyWord      Function that modifies a single word
- *     modifyWord_args Custom arguments for modifyWord
- *
- * Results:
- *     A string of all the words modified appropriately.
- */
-static char *
-ModifyWords(const char *str,
-           ModifyWordsCallback modifyWord, void *modifyWord_args,
-           Boolean oneBigWord, char sep)
-{
-       SepBuf result;
-       Words words;
-       size_t i;
-
-       if (oneBigWord) {
-               SepBuf_Init(&result, sep);
-               modifyWord(str, &result, modifyWord_args);
-               return SepBuf_DoneData(&result);
-       }
-
-       SepBuf_Init(&result, sep);
-
-       words = Str_Words(str, FALSE);
-
-       DEBUG2(VAR, "ModifyWords: split \"%s\" into %u words\n",
-           str, (unsigned)words.len);
-
-       for (i = 0; i < words.len; i++) {
-               modifyWord(words.words[i], &result, modifyWord_args);
-               if (result.buf.len > 0)
-                       SepBuf_Sep(&result);
-       }
-
-       Words_Free(words);
-
-       return SepBuf_DoneData(&result);
-}
-
 
 static char *
 Words_JoinFree(Words words)
@@ -2367,6 +2323,48 @@
        return TRUE;
 }
 
+/*
+ * Modify each of the words of the passed string using the given function.
+ *
+ * Input:
+ *     str             String whose words should be modified
+ *     modifyWord      Function that modifies a single word
+ *     modifyWord_args Custom arguments for modifyWord
+ */
+static void
+ModifyWords(ApplyModifiersState *st, const char *str,
+           ModifyWordsCallback modifyWord, void *modifyWord_args,
+           Boolean oneBigWord)
+{
+       SepBuf result;
+       Words words;
+       size_t i;
+
+       if (oneBigWord) {
+               SepBuf_Init(&result, st->sep);
+               modifyWord(str, &result, modifyWord_args);
+               goto done;
+       }
+
+       SepBuf_Init(&result, st->sep);
+
+       words = Str_Words(str, FALSE);
+
+       DEBUG2(VAR, "ModifyWords: split \"%s\" into %u words\n",
+           str, (unsigned)words.len);
+
+       for (i = 0; i < words.len; i++) {
+               modifyWord(words.words[i], &result, modifyWord_args);
+               if (result.buf.len > 0)
+                       SepBuf_Sep(&result);
+       }
+
+       Words_Free(words);
+
+done:
+       Expr_SetValueOwn(st, SepBuf_DoneData(&result));
+}
+
 /* :@var@...${var}...@ */
 static ApplyModifierResult
 ApplyModifier_Loop(const char **pp, const char *val, ApplyModifiersState *st)
@@ -2396,8 +2394,7 @@
        args.eflags = st->eflags & ~(unsigned)VARE_KEEP_DOLLAR;
        prev_sep = st->sep;
        st->sep = ' ';          /* XXX: should be st->sep for consistency */
-       Expr_SetValueOwn(st,
-           ModifyWords(val, ModifyWord_Loop, &args, st->oneBigWord, st->sep));
+       ModifyWords(st, val, ModifyWord_Loop, &args, st->oneBigWord);
        st->sep = prev_sep;
        /* XXX: Consider restoring the previous variable instead of deleting. */
        /*
@@ -2736,8 +2733,7 @@
            st->var->name.str, val, pattern);
 
        callback = mod[0] == 'M' ? ModifyWord_Match : ModifyWord_NoMatch;
-       Expr_SetValueOwn(st,
-           ModifyWords(val, callback, pattern, st->oneBigWord, st->sep));
+       ModifyWords(st, val, callback, pattern, st->oneBigWord);
        free(pattern);
        return AMR_OK;
 }
@@ -2796,8 +2792,7 @@
                        break;
        }
 
-       Expr_SetValueOwn(st,
-           ModifyWords(val, ModifyWord_Subst, &args, oneBigWord, st->sep));
+       ModifyWords(st, val, ModifyWord_Subst, &args, oneBigWord);
 
        free(lhs);
        free(rhs);
@@ -2860,9 +2855,9 @@
        args.nsub = args.re.re_nsub + 1;
        if (args.nsub > 10)
                args.nsub = 10;
-       Expr_SetValueOwn(st,
-           ModifyWords(val, ModifyWord_SubstRegex, &args,
-               oneBigWord, st->sep));
+
+       ModifyWords(st, val, ModifyWord_SubstRegex, &args, oneBigWord);
+
        regfree(&args.re);
        free(args.replace);
        return AMR_OK;
@@ -2956,8 +2951,7 @@
        }
 
 ok:
-       Expr_SetValueOwn(st,
-           ModifyWords(val, ModifyWord_Copy, NULL, st->oneBigWord, st->sep));
+       ModifyWords(st, val, ModifyWord_Copy, NULL, st->oneBigWord);
        return AMR_OK;
 }
 
@@ -3010,9 +3004,7 @@
        }
 
        if (mod[1] == 'A') {                            /* :tA */
-               Expr_SetValueOwn(st,
-                   ModifyWords(val, ModifyWord_Realpath, NULL,
-                       st->oneBigWord, st->sep));
+               ModifyWords(st, val, ModifyWord_Realpath, NULL, st->oneBigWord);
                *pp = mod + 2;
                return AMR_OK;
        }
@@ -3380,8 +3372,7 @@
        if (delim != st->endc && delim != ':')
                return AMR_UNKNOWN;
 
-       Expr_SetValueOwn(st,
-           ModifyWords(val, modifyWord, NULL, st->oneBigWord, st->sep));
+       ModifyWords(st, val, modifyWord, NULL, st->oneBigWord);
        (*pp)++;
        return AMR_OK;
 }
@@ -3443,9 +3434,8 @@
                Expr_SetValueRefer(st, val); /* special case */
        } else {
                struct ModifyWord_SYSVSubstArgs args = { st->scope, lhs, rhs };
-               Expr_SetValueOwn(st,
-                   ModifyWords(val, ModifyWord_SYSVSubst, &args,
-                       st->oneBigWord, st->sep));
+               ModifyWords(st, val, ModifyWord_SYSVSubst, &args,
+                   st->oneBigWord);
        }
        free(lhs);
        free(rhs);