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author | Denys Vlasenko | 2018-12-20 20:34:09 +0100 |
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committer | Denys Vlasenko | 2018-12-20 20:34:09 +0100 |
commit | 44a99ca61716f9846756c3d0cd434bfe8192339e (patch) | |
tree | 4e39c7c272aea2ac92620d8759a8bd98635b0cf8 | |
parent | 5acd14ba5b911aff28cb259cabdb84c5f8233e55 (diff) | |
download | busybox-44a99ca61716f9846756c3d0cd434bfe8192339e.zip busybox-44a99ca61716f9846756c3d0cd434bfe8192339e.tar.gz |
bc: "dc only" config does not need G.prog.fn_map
function old new delta
bc_program_add_fn - 43 +43
bc_vm_init 655 675 +20
bc_program_addFunc 138 118 -20
zdc_parse_expr 658 635 -23
zdc_program_asciify 447 407 -40
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/3 up/down: 63/-83) Total: -20 bytes
text data bss dec hex filename
984739 489 7312 992540 f251c busybox_old
984712 489 7312 992513 f2501 busybox_unstripped
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r-- | miscutils/bc.c | 92 |
1 files changed, 56 insertions, 36 deletions
diff --git a/miscutils/bc.c b/miscutils/bc.c index 1e2ca8b..e051917 100644 --- a/miscutils/bc.c +++ b/miscutils/bc.c @@ -686,7 +686,7 @@ typedef struct BcProgram { BcVec exestack; BcVec fns; - BcVec fn_map; //TODO: dc does not need this, its 'functions' are anonynomous (have no names) + IF_BC(BcVec fn_map;) BcVec vars; BcVec var_map; @@ -3606,12 +3606,23 @@ static void bc_parse_create(BcParse *p, size_t fidx) p->func = bc_program_func(fidx); } +static size_t bc_program_add_fn(void) +{ + size_t idx; + BcFunc f; + bc_func_init(&f); + idx = G.prog.fns.len; + bc_vec_push(&G.prog.fns, &f); + return idx; +} + +#if ENABLE_BC + // Note: takes ownership of 'name' (must be malloced) static size_t bc_program_addFunc(char *name) { size_t idx; BcId entry, *entry_ptr; - BcFunc f; int inserted; entry.name = name; @@ -3630,15 +3641,12 @@ static size_t bc_program_addFunc(char *name) bc_func_free(func); bc_func_init(func); } else { - bc_func_init(&f); - bc_vec_push(&G.prog.fns, &f); + bc_program_add_fn(); } return idx; } -#if ENABLE_BC - #define BC_PARSE_TOP_OP(p) (*((BcLexType *) bc_vec_top(&(p)->ops))) #define BC_PARSE_LEAF(p, rparen) \ (((p) >= BC_INST_NUM && (p) <= BC_INST_SQRT) || (rparen) || \ @@ -4776,19 +4784,22 @@ static BC_STATUS zdc_parse_register(BcParse *p) static BC_STATUS zdc_parse_string(BcParse *p) { - char *str, *name; + char *str; size_t len = G.prog.strs.len; -//why pad to 32 zeros?? - name = xasprintf("%032lu", (unsigned long)len); + dbg_lex_enter("%s:%d entered", __func__, __LINE__); str = xstrdup(p->l.t.v.v); bc_parse_push(p, BC_INST_STR); bc_parse_pushIndex(p, len); bc_vec_push(&G.prog.strs, &str); - bc_program_addFunc(name); + + // Explanation needed here + bc_program_add_fn(); p->func = bc_program_func(p->fidx); + dbg_lex_done("%s:%d done", __func__, __LINE__); + RETURN_STATUS(zbc_lex_next(&p->l)); } #define zdc_parse_string(...) (zdc_parse_string(__VA_ARGS__) COMMA_SUCCESS) @@ -4843,6 +4854,7 @@ static BC_STATUS zdc_parse_token(BcParse *p, BcLexType t, uint8_t flags) uint8_t inst; bool assign, get_token = false; + dbg_lex_enter("%s:%d entered", __func__, __LINE__); switch (t) { case BC_LEX_OP_REL_EQ: case BC_LEX_OP_REL_LE: @@ -4857,10 +4869,12 @@ static BC_STATUS zdc_parse_token(BcParse *p, BcLexType t, uint8_t flags) s = zdc_parse_mem(p, BC_INST_ARRAY_ELEM, true, t == BC_LEX_COLON); break; case BC_LEX_STR: + dbg_lex("%s:%d LEX_STR", __func__, __LINE__); s = zdc_parse_string(p); break; case BC_LEX_NEG: case BC_LEX_NUMBER: + dbg_lex("%s:%d LEX_NEG/NUMBER", __func__, __LINE__); if (t == BC_LEX_NEG) { s = zbc_lex_next(&p->l); if (s) RETURN_STATUS(s); @@ -4903,6 +4917,7 @@ static BC_STATUS zdc_parse_token(BcParse *p, BcLexType t, uint8_t flags) if (!s && get_token) s = zbc_lex_next(&p->l); + dbg_lex_done("%s:%d done", __func__, __LINE__); RETURN_STATUS(s); } #define zdc_parse_token(...) (zdc_parse_token(__VA_ARGS__) COMMA_SUCCESS) @@ -4911,6 +4926,7 @@ static BC_STATUS zdc_parse_expr(BcParse *p, uint8_t flags) { BcLexType t; + dbg_lex_enter("%s:%d entered G.prs.l.t.t:%d", __func__, __LINE__, G.prs.l.t.t); for (;;) { BcInst inst; BcStatus s; @@ -4920,9 +4936,11 @@ static BC_STATUS zdc_parse_expr(BcParse *p, uint8_t flags) inst = dc_parse_insts[t]; if (inst != BC_INST_INVALID) { + dbg_lex("%s:%d", __func__, __LINE__); bc_parse_push(p, inst); s = zbc_lex_next(&p->l); } else { + dbg_lex("%s:%d", __func__, __LINE__); s = zdc_parse_token(p, t, flags); } if (s) RETURN_STATUS(s); @@ -4931,6 +4949,7 @@ static BC_STATUS zdc_parse_expr(BcParse *p, uint8_t flags) if (flags & BC_PARSE_NOCALL) bc_parse_push(p, BC_INST_POP_EXEC); + dbg_lex_done("%s:%d done", __func__, __LINE__); RETURN_STATUS(BC_STATUS_SUCCESS); } #define zdc_parse_expr(...) (zdc_parse_expr(__VA_ARGS__) COMMA_SUCCESS) @@ -6122,8 +6141,10 @@ static BC_STATUS zdc_program_asciify(void) BcStatus s; BcResult *r, res; BcNum *num, n; - char *str, *str2, c; - size_t len = G.prog.strs.len, idx; + char **strs; + char *str; + char c; + size_t idx; unsigned long val; if (!STACK_HAS_MORE_THAN(&G.prog.results, 0)) @@ -6155,31 +6176,25 @@ static BC_STATUS zdc_program_asciify(void) bc_num_free(&n); } else { + char *sp; idx = (r->t == BC_RESULT_STR) ? r->d.id.idx : num->rdx; - str2 = *bc_program_str(idx); - c = str2[0]; + sp = *bc_program_str(idx); + c = sp[0]; } + strs = (void*)G.prog.strs.v; + for (idx = 0; idx < G.prog.strs.len; idx++) { + if (strs[idx][0] == c && strs[idx][1] == '\0') { + goto dup; + } + } str = xzalloc(2); str[0] = c; //str[1] = '\0'; - already is - - str2 = xstrdup(str); - idx = bc_program_addFunc(str2); - - if (idx != len + BC_PROG_REQ_FUNCS) { - for (idx = 0; idx < G.prog.strs.len; ++idx) { - if (strcmp(*bc_program_str(idx), str) == 0) { - len = idx; - break; - } - } - free(str); - } else - bc_vec_push(&G.prog.strs, &str); - + bc_vec_push(&G.prog.strs, &str); + dup: res.t = BC_RESULT_STR; - res.d.id.idx = len; + res.d.id.idx = idx; bc_vec_pop(&G.prog.results); bc_vec_push(&G.prog.results, &res); @@ -6973,7 +6988,7 @@ static BC_STATUS zbc_vm_exec(void) static void bc_program_free(void) { bc_vec_free(&G.prog.fns); - bc_vec_free(&G.prog.fn_map); + IF_BC(bc_vec_free(&G.prog.fn_map);) bc_vec_free(&G.prog.vars); bc_vec_free(&G.prog.var_map); bc_vec_free(&G.prog.arrs); @@ -6982,8 +6997,8 @@ static void bc_program_free(void) bc_vec_free(&G.prog.consts); bc_vec_free(&G.prog.results); bc_vec_free(&G.prog.exestack); - bc_num_free(&G.prog.last); - bc_num_free(&G.prog.zero); + IF_BC(bc_num_free(&G.prog.last);) + IF_BC(bc_num_free(&G.prog.zero);) IF_BC(bc_num_free(&G.prog.one);) bc_vec_free(&G.input_buffer); } @@ -7018,11 +7033,16 @@ static void bc_program_init(void) IF_BC(bc_num_one(&G.prog.one);) bc_vec_init(&G.prog.fns, sizeof(BcFunc), bc_func_free); - bc_vec_init(&G.prog.fn_map, sizeof(BcId), bc_id_free); + IF_BC(bc_vec_init(&G.prog.fn_map, sizeof(BcId), bc_id_free);) //TODO: with "", dc_strings.dc enters infinite loop, ??! - bc_program_addFunc(xstrdup("(m)")); // func #0: main - bc_program_addFunc(xstrdup("(r)")); // func #1: for read() + if (IS_BC) { + IF_BC(bc_program_addFunc(xstrdup("(m)"))); // func #0: main + IF_BC(bc_program_addFunc(xstrdup("(r)"))); // func #1: for read() + } else { + bc_program_add_fn(); + bc_program_add_fn(); + } bc_vec_init(&G.prog.vars, sizeof(BcVec), bc_vec_free); bc_vec_init(&G.prog.var_map, sizeof(BcId), bc_id_free); |