[src/trunk]: src/usr.bin/make make(1): extract logging from ApplyModifiers in...

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

details:   https://anonhg.NetBSD.org/src/rev/c1e40dbb45f5
branches:  trunk
changeset: 939737:c1e40dbb45f5
user:      rillig <rillig%NetBSD.org@localhost>
date:      Mon Sep 28 21:11:05 2020 +0000

description:
make(1): extract logging from ApplyModifiers into separate functions

These two logging blocks are massive enough to disturb the reading flow
of the remaining code.

Even without these two blocks, ApplyModifiers is still 250 lines long,
which is quite much.

diffstat:

 usr.bin/make/var.c |  90 ++++++++++++++++++++++++++++++------------------------
 1 files changed, 50 insertions(+), 40 deletions(-)

diffs (125 lines):

diff -r 4a96b6bfe1b0 -r c1e40dbb45f5 usr.bin/make/var.c
--- a/usr.bin/make/var.c        Mon Sep 28 21:01:53 2020 +0000
+++ b/usr.bin/make/var.c        Mon Sep 28 21:11:05 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: var.c,v 1.548 2020/09/28 21:01:53 rillig Exp $ */
+/*     $NetBSD: var.c,v 1.549 2020/09/28 21:11:05 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 1.548 2020/09/28 21:01:53 rillig Exp $");
+MAKE_RCSID("$NetBSD: var.c,v 1.549 2020/09/28 21:11:05 rillig Exp $");
 
 #define VAR_DEBUG1(fmt, arg1) DEBUG1(VAR, fmt, arg1)
 #define VAR_DEBUG2(fmt, arg1, arg2) DEBUG2(VAR, fmt, arg1, arg2)
@@ -2987,6 +2987,50 @@
 }
 #endif
 
+static void
+LogBeforeApply(const ApplyModifiersState *st, const char *mod, const char endc)
+{
+    char eflags_str[VarEvalFlags_ToStringSize];
+    char vflags_str[VarFlags_ToStringSize];
+    char exprflags_str[VarExprFlags_ToStringSize];
+    Boolean is_single_char = mod[0] != '\0' &&
+                            (mod[1] == endc || mod[1] == ':');
+
+    /* At this point, only the first character of the modifier can
+     * be used since the end of the modifier is not yet known. */
+    fprintf(debug_file,
+           "Applying ${%s:%c%s} to \"%s\" (%s, %s, %s)\n",
+           st->v->name, mod[0], is_single_char ? "" : "...", st->val,
+           Enum_FlagsToString(eflags_str, sizeof eflags_str,
+                              st->eflags, VarEvalFlags_ToStringSpecs),
+           Enum_FlagsToString(vflags_str, sizeof vflags_str,
+                              st->v->flags, VarFlags_ToStringSpecs),
+           Enum_FlagsToString(exprflags_str, sizeof exprflags_str,
+                              st->exprFlags,
+                              VarExprFlags_ToStringSpecs));
+}
+
+static void
+LogAfterApply(ApplyModifiersState *st, const char *p, const char *mod)
+{
+    char eflags_str[VarEvalFlags_ToStringSize];
+    char vflags_str[VarFlags_ToStringSize];
+    char exprflags_str[VarExprFlags_ToStringSize];
+    const char *quot = st->newVal == var_Error ? "" : "\"";
+    const char *newVal = st->newVal == var_Error ? "error" : st->newVal;
+
+    fprintf(debug_file,
+           "Result of ${%s:%.*s} is %s%s%s (%s, %s, %s)\n",
+           st->v->name, (int)(p - mod), mod, quot, newVal, quot,
+           Enum_FlagsToString(eflags_str, sizeof eflags_str,
+                              st->eflags, VarEvalFlags_ToStringSpecs),
+           Enum_FlagsToString(vflags_str, sizeof vflags_str,
+                              st->v->flags, VarFlags_ToStringSpecs),
+           Enum_FlagsToString(exprflags_str, sizeof exprflags_str,
+                              st->exprFlags,
+                              VarExprFlags_ToStringSpecs));
+}
+
 /* Apply any modifiers (such as :Mpattern or :@var@loop@ or :Q or ::=value). */
 static char *
 ApplyModifiers(
@@ -3072,26 +3116,8 @@
        res = AMR_BAD;          /* just a safe fallback */
        mod = p;
 
-       if (DEBUG(VAR)) {
-           char eflags_str[VarEvalFlags_ToStringSize];
-           char vflags_str[VarFlags_ToStringSize];
-           char exprflags_str[VarExprFlags_ToStringSize];
-           Boolean is_single_char = mod[0] != '\0' &&
-                                    (mod[1] == endc || mod[1] == ':');
-
-           /* At this point, only the first character of the modifier can
-            * be used since the end of the modifier is not yet known. */
-           fprintf(debug_file,
-                   "Applying ${%s:%c%s} to \"%s\" (%s, %s, %s)\n",
-                   st.v->name, mod[0], is_single_char ? "" : "...", st.val,
-                   Enum_FlagsToString(eflags_str, sizeof eflags_str,
-                                      st.eflags, VarEvalFlags_ToStringSpecs),
-                   Enum_FlagsToString(vflags_str, sizeof vflags_str,
-                                      st.v->flags, VarFlags_ToStringSpecs),
-                   Enum_FlagsToString(exprflags_str, sizeof exprflags_str,
-                                      st.exprFlags,
-                                      VarExprFlags_ToStringSpecs));
-       }
+       if (DEBUG(VAR))
+           LogBeforeApply(&st, mod, endc);
 
        switch (*mod) {
        case ':':
@@ -3211,24 +3237,8 @@
        if (res == AMR_BAD)
            goto bad_modifier;
 
-       if (DEBUG(VAR)) {
-           char eflags_str[VarEvalFlags_ToStringSize];
-           char vflags_str[VarFlags_ToStringSize];
-           char exprflags_str[VarExprFlags_ToStringSize];
-           const char *quot = st.newVal == var_Error ? "" : "\"";
-           const char *newVal = st.newVal == var_Error ? "error" : st.newVal;
-
-           fprintf(debug_file,
-                   "Result of ${%s:%.*s} is %s%s%s (%s, %s, %s)\n",
-                   st.v->name, (int)(p - mod), mod, quot, newVal, quot,
-                   Enum_FlagsToString(eflags_str, sizeof eflags_str,
-                                      st.eflags, VarEvalFlags_ToStringSpecs),
-                   Enum_FlagsToString(vflags_str, sizeof vflags_str,
-                                      st.v->flags, VarFlags_ToStringSpecs),
-                   Enum_FlagsToString(exprflags_str, sizeof exprflags_str,
-                                      st.exprFlags,
-                                      VarExprFlags_ToStringSpecs));
-       }
+       if (DEBUG(VAR))
+           LogAfterApply(&st, p, mod);
 
        if (st.newVal != st.val) {
            if (*freePtr) {