[src/trunk]: src/usr.bin/xlint/lint1 lint: extract brace level code into sepa...

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

details:   https://anonhg.NetBSD.org/src/rev/242dd8e7ddc3
branches:  trunk
changeset: 981962:242dd8e7ddc3
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sat Mar 27 22:53:10 2021 +0000

description:
lint: extract brace level code into separate functions

No functional change.

diffstat:

 usr.bin/xlint/lint1/init.c |  73 +++++++++++++++++++++++++++++----------------
 1 files changed, 47 insertions(+), 26 deletions(-)

diffs (126 lines):

diff -r b45f695ac5ab -r 242dd8e7ddc3 usr.bin/xlint/lint1/init.c
--- a/usr.bin/xlint/lint1/init.c        Sat Mar 27 22:35:10 2021 +0000
+++ b/usr.bin/xlint/lint1/init.c        Sat Mar 27 22:53:10 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: init.c,v 1.142 2021/03/27 22:35:10 rillig Exp $        */
+/*     $NetBSD: init.c,v 1.143 2021/03/27 22:53:10 rillig Exp $        */
 
 /*
  * Copyright (c) 1994, 1995 Jochen Pohl
@@ -37,7 +37,7 @@
 
 #include <sys/cdefs.h>
 #if defined(__RCSID) && !defined(lint)
-__RCSID("$NetBSD: init.c,v 1.142 2021/03/27 22:35:10 rillig Exp $");
+__RCSID("$NetBSD: init.c,v 1.143 2021/03/27 22:53:10 rillig Exp $");
 #endif
 
 #include <stdlib.h>
@@ -520,6 +520,36 @@
 /* TODO: Move the function body up here, to avoid the forward declaration. */
 static void initstack_pop_nobrace(void);
 
+static struct brace_level *
+brace_level_new(type_t *type, type_t *subtype, int remaining)
+{
+       struct brace_level *level = xcalloc(1, sizeof(*level));
+
+       level->bl_type = type;
+       level->bl_subtype = subtype;
+       level->bl_remaining = remaining;
+
+       return level;
+}
+
+static const sym_t *
+brace_level_look_up_member(const char *name)
+{
+       const type_t *tp = current_brace_level()->bl_type;
+       const sym_t *m;
+
+       lint_assert(tp->t_tspec == STRUCT || tp->t_tspec == UNION);
+
+       for (m = tp->t_str->sou_first_member; m != NULL; m = m->s_next) {
+               if (m->s_bitfield && m->s_name == unnamed)
+                       continue;
+               if (strcmp(m->s_name, name) == 0)
+                       return m;
+       }
+
+       return NULL;
+}
+
 static void
 brace_level_set_array_dimension(int dim)
 {
@@ -600,7 +630,6 @@
 void
 initstack_init(void)
 {
-       struct brace_level *level;
 
        if (initerr)
                return;
@@ -615,9 +644,7 @@
                initsym->s_type = duptyp(initsym->s_type);
        /* TODO: does 'duptyp' create a memory leak? */
 
-       level = brace_level_lvalue = xcalloc(1, sizeof *brace_level_lvalue);
-       level->bl_subtype = initsym->s_type;
-       level->bl_remaining = 1;
+       brace_level_lvalue = brace_level_new(NULL, initsym->s_type, 1);
 
        debug_initstack();
        debug_leave();
@@ -628,7 +655,7 @@
 initstack_pop_item_named_member(const char *name)
 {
        struct brace_level *level = brace_level_lvalue;
-       sym_t *m;
+       const sym_t *m;
 
        /*
         * TODO: fix wording of the debug message; this doesn't seem to be
@@ -644,29 +671,23 @@
                return;
        }
 
-       for (m = level->bl_type->t_str->sou_first_member;
-            m != NULL; m = m->s_next) {
-
-               if (m->s_bitfield && m->s_name == unnamed)
-                       continue;
+       m = brace_level_look_up_member(name);
+       if (m == NULL) {
+               /* TODO: add type information to the message */
+               /* undefined struct/union member: %s */
+               error(101, name);
 
-               if (strcmp(m->s_name, name) == 0) {
-                       debug_step("found matching member");
-                       level->bl_subtype = m->s_type;
-                       /* XXX: why ++? */
-                       level->bl_remaining++;
-                       /* XXX: why is bl_seen_named_member not set? */
-                       designation_shift_level();
-                       return;
-               }
+               designation_shift_level();
+               level->bl_seen_named_member = true;
+               return;
        }
 
-       /* TODO: add type information to the message */
-       /* undefined struct/union member: %s */
-       error(101, name);
-
+       debug_step("found matching member");
+       level->bl_subtype = m->s_type;
+       /* XXX: why ++? */
+       level->bl_remaining++;
+       /* XXX: why is bl_seen_named_member not set? */
        designation_shift_level();
-       level->bl_seen_named_member = true;
 }
 
 /* TODO: think of a better name than 'pop' */