From e55a5726001ce23161c4bd0010b842578e7b722c Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Thu, 6 Dec 2018 12:47:17 +0100 Subject: bc: small simplification in dc_lex_token() Pulling array element into a temporary, taking address of this temporary and copying it? That's much unnecessary work. function old new delta dc_lex_token 701 697 -4 Signed-off-by: Denys Vlasenko --- miscutils/bc.c | 29 ++++++++++++++--------------- 1 file changed, 14 insertions(+), 15 deletions(-) (limited to 'miscutils') diff --git a/miscutils/bc.c b/miscutils/bc.c index eae91e9c5..40430d411 100644 --- a/miscutils/bc.c +++ b/miscutils/bc.c @@ -588,15 +588,11 @@ typedef struct BcLex { #define BC_PARSE_STREND ((char) UCHAR_MAX) -#define bc_parse_push(p, i) (bc_vec_pushByte(&(p)->func->code, (char) (i))) -#define bc_parse_updateFunc(p, f) \ - ((p)->func = bc_vec_item(&G.prog.fns, ((p)->fidx = (f)))) - -#define BC_PARSE_REL (1 << 0) -#define BC_PARSE_PRINT (1 << 1) +#define BC_PARSE_REL (1 << 0) +#define BC_PARSE_PRINT (1 << 1) #define BC_PARSE_NOCALL (1 << 2) #define BC_PARSE_NOREAD (1 << 3) -#define BC_PARSE_ARRAY (1 << 4) +#define BC_PARSE_ARRAY (1 << 4) #define BC_PARSE_TOP_FLAG_PTR(parse) ((uint8_t *) bc_vec_top(&(parse)->flags)) #define BC_PARSE_TOP_FLAG(parse) (*(BC_PARSE_TOP_FLAG_PTR(parse))) @@ -638,12 +634,6 @@ typedef struct BcParseNext { BcLexType tokens[4]; } BcParseNext; -#define BC_PARSE_NEXT_TOKENS(...) .tokens = { __VA_ARGS__ } -#define BC_PARSE_NEXT(a, ...) \ - { \ - .len = (a), BC_PARSE_NEXT_TOKENS(__VA_ARGS__) \ - } - struct BcParse; struct BcProgram; @@ -716,7 +706,6 @@ typedef struct BcProgram { #define BC_PROG_MAIN (0) #define BC_PROG_READ (1) - #if ENABLE_DC #define BC_PROG_REQ_FUNCS (2) #endif @@ -839,6 +828,11 @@ static const uint8_t bc_parse_ops[] = { #define bc_parse_op_LEFT(i) (bc_parse_ops[i] & 0x10) // These identify what tokens can come after expressions in certain cases. +#define BC_PARSE_NEXT_TOKENS(...) .tokens = { __VA_ARGS__ } +#define BC_PARSE_NEXT(a, ...) \ + { \ + .len = (a), BC_PARSE_NEXT_TOKENS(__VA_ARGS__) \ + } static const BcParseNext bc_parse_next_expr = BC_PARSE_NEXT(4, BC_LEX_NLINE, BC_LEX_SCOLON, BC_LEX_RBRACE, BC_LEX_EOF); static const BcParseNext bc_parse_next_param = @@ -1101,6 +1095,8 @@ static void bc_vec_push(BcVec *v, const void *data) v->len += 1; } +#define bc_parse_push(p, i) bc_vec_pushByte(&(p)->func->code, (char) (i)) + static void bc_vec_pushByte(BcVec *v, char data) { bc_vec_push(v, &data); @@ -3377,7 +3373,7 @@ static BcStatus dc_lex_register(BcLex *l) } else { bc_vec_pop_all(&l->t.v); - bc_vec_pushByte(&l->t.v, l->buf[l->i - 1]); + bc_vec_push(&l->t.v, &l->buf[l->i - 1]); bc_vec_pushZeroByte(&l->t.v); l->t.t = BC_LEX_NAME; } @@ -3587,6 +3583,9 @@ static BcStatus bc_parse_text(BcParse *p, const char *text) return bc_lex_text(&p->l, text); } +#define bc_parse_updateFunc(p, f) \ + ((p)->func = bc_vec_item(&G.prog.fns, ((p)->fidx = (f)))) + // Called when bc/dc_parse_parse() detects a failure, // resets parsing structures. static void bc_parse_reset(BcParse *p) -- cgit v1.2.3