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authorDenys Vlasenko2018-12-22 06:00:25 +0100
committerDenys Vlasenko2018-12-22 06:00:25 +0100
commit88fcd5cc6c9b64daf200860a53783d03c8dfe225 (patch)
treeb5ea294d59158558fcdce57c76525df37c75e6cf
parent514967df5e5ef21873dc2f8a303e892e3f200ea4 (diff)
downloadbusybox-88fcd5cc6c9b64daf200860a53783d03c8dfe225.zip
busybox-88fcd5cc6c9b64daf200860a53783d03c8dfe225.tar.gz
bc: fold single-callsite functions into callers, commonalize code
function old new delta zbc_vm_process 699 745 +46 zbc_parse_stmt_possibly_auto 1689 1682 -7 bc_parse_reset 113 - -113 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 1/1 up/down: 46/-120) Total: -74 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--miscutils/bc.c98
1 files changed, 33 insertions, 65 deletions
diff --git a/miscutils/bc.c b/miscutils/bc.c
index 4d252cc..29007d8 100644
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -2828,18 +2828,6 @@ static void bc_lex_file(BcLex *l)
l->newline = false;
}
-IF_BC(static BC_STATUS zbc_lex_token(BcLex *l);)
-IF_DC(static BC_STATUS zdc_lex_token(BcLex *l);)
-
-static BC_STATUS zcommon_lex_token(BcLex *l)
-{
- if (IS_BC) {
- IF_BC(RETURN_STATUS(zbc_lex_token(l));)
- }
- IF_DC(RETURN_STATUS(zdc_lex_token(l));)
-}
-#define zcommon_lex_token(...) (zcommon_lex_token(__VA_ARGS__) COMMA_SUCCESS)
-
static bool bc_lex_more_input(BcLex *l)
{
size_t str;
@@ -2912,6 +2900,9 @@ static bool bc_lex_more_input(BcLex *l)
return l->len != 0;
}
+IF_BC(static BC_STATUS zbc_lex_token(BcLex *l);)
+IF_DC(static BC_STATUS zdc_lex_token(BcLex *l);)
+
static BC_STATUS zbc_lex_next(BcLex *l)
{
BcStatus s;
@@ -2941,7 +2932,11 @@ static BC_STATUS zbc_lex_next(BcLex *l)
dbg_lex("next string to parse:'%.*s'",
(int)(strchrnul(l->buf + l->i, '\n') - (l->buf + l->i)),
l->buf + l->i);
- s = zcommon_lex_token(l);
+ if (IS_BC) {
+ IF_BC(s = zbc_lex_token(l));
+ } else {
+ IF_DC(s = zdc_lex_token(l));
+ }
} while (!s && l->t.t == BC_LEX_WHITESPACE);
dbg_lex("l->t.t from string:%d", l->t.t);
@@ -3571,24 +3566,6 @@ static void bc_parse_pushNUM(BcParse *p)
bc_parse_pushIndex(p, idx);
}
-IF_BC(static BC_STATUS zbc_parse_stmt_or_funcdef(BcParse *p);)
-IF_DC(static BC_STATUS zdc_parse_parse(BcParse *p);)
-
-// "Parse" half of "parse,execute,repeat" main loop
-static BC_STATUS zcommon_parse(BcParse *p)
-{
- if (IS_BC) {
-// FIXME: "eating" of stmt delemiters is coded inconsistently
-// (sometimes zbc_parse_stmt() eats the delimiter, sometimes don't),
-// which causes bugs such as "print 1 print 2" erroneously accepted,
-// or "print 1 else 2" detecting parse error only after executing
-// "print 1" part.
- IF_BC(RETURN_STATUS(zbc_parse_stmt_or_funcdef(p));)
- }
- IF_DC(RETURN_STATUS(zdc_parse_parse(p));)
-}
-#define zcommon_parse(...) (zcommon_parse(__VA_ARGS__) COMMA_SUCCESS)
-
static BC_STATUS zbc_parse_text_init(BcParse *p, const char *text)
{
p->func = bc_program_func(p->fidx);
@@ -3612,15 +3589,13 @@ static void bc_program_reset(void)
ip->inst_idx = f->code.len;
}
-// Called when zbc/zdc_parse_parse() detects a failure,
+// Called when parsing code detects a failure,
// resets parsing structures.
static void bc_parse_reset(BcParse *p)
{
if (p->fidx != BC_PROG_MAIN) {
- bc_vec_pop_all(&p->func->code);
- IF_BC(bc_vec_pop_all(&p->func->labels);)
- IF_BC(bc_vec_pop_all(&p->func->autos);)
- IF_BC(p->func->nparams = 0;)
+ bc_func_free(p->func);
+ bc_func_init(p->func);
p->fidx = BC_PROG_MAIN;
p->func = bc_program_func_BC_PROG_MAIN();
@@ -4592,11 +4567,6 @@ static BC_STATUS zbc_parse_stmt_possibly_auto(BcParse *p, bool auto_allowed)
break;
}
- if (s || G_interrupt) {
- bc_parse_reset(p);
- s = BC_STATUS_FAILURE;
- }
-
dbg_lex_done("%s:%d done", __func__, __LINE__);
RETURN_STATUS(s);
}
@@ -4980,13 +4950,13 @@ static BC_STATUS zdc_parse_expr(BcParse *p)
{
BcLexType t;
- dbg_lex_enter("%s:%d entered G.prs.l.t.t:%d", __func__, __LINE__, G.prs.l.t.t);
+ dbg_lex_enter("%s:%d entered, p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
for (;;) {
BcInst inst;
BcStatus s;
t = p->l.t.t;
- dbg_lex("%s:%d G.prs.l.t.t:%d", __func__, __LINE__, G.prs.l.t.t);
+ dbg_lex("%s:%d p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
if (t == BC_LEX_EOF) break;
inst = dc_parse_insts[t];
@@ -5006,26 +4976,6 @@ static BC_STATUS zdc_parse_expr(BcParse *p)
}
#define zdc_parse_expr(...) (zdc_parse_expr(__VA_ARGS__) COMMA_SUCCESS)
-static BC_STATUS zdc_parse_parse(BcParse *p)
-{
- BcStatus s;
-
- dbg_lex_enter("%s:%d entered", __func__, __LINE__);
- if (p->l.t.t == BC_LEX_EOF)
- s = bc_error("end of file");
- else
- s = zdc_parse_expr(p);
-
- if (s || G_interrupt) {
- bc_parse_reset(p);
- s = BC_STATUS_FAILURE;
- }
-
- dbg_lex_done("%s:%d done", __func__, __LINE__);
- RETURN_STATUS(s);
-}
-#define zdc_parse_parse(...) (zdc_parse_parse(__VA_ARGS__) COMMA_SUCCESS)
-
#endif // ENABLE_DC
static BcVec* bc_program_search(char *id, bool var)
@@ -6687,8 +6637,26 @@ static BC_STATUS zbc_vm_process(const char *text)
while (G.prs.l.t.t != BC_LEX_EOF) {
dbg_lex("%s:%d G.prs.l.t.t:%d, parsing...", __func__, __LINE__, G.prs.l.t.t);
- s = zcommon_parse(&G.prs);
- if (s) RETURN_STATUS(s);
+ if (IS_BC) {
+// FIXME: "eating" of stmt delemiters is coded inconsistently
+// (sometimes zbc_parse_stmt() eats the delimiter, sometimes don't),
+// which causes bugs such as "print 1 print 2" erroneously accepted,
+// or "print 1 else 2" detecting parse error only after executing
+// "print 1" part.
+ IF_BC(s = zbc_parse_stmt_or_funcdef(&G.prs));
+ } else {
+#if ENABLE_DC
+ if (G.prs.l.t.t == BC_LEX_EOF)
+ s = bc_error("end of file");
+ else
+ s = zdc_parse_expr(&G.prs);
+#endif
+ }
+ if (s || G_interrupt) {
+ bc_parse_reset(&G.prs); // includes bc_program_reset()
+ RETURN_STATUS(BC_STATUS_FAILURE);
+ }
+
dbg_lex("%s:%d executing...", __func__, __LINE__);
s = zbc_program_exec();
if (s) {