bc: add accessors for G.prog.strs[idx], G.prog.fns[idx]

function                                             old     new   delta
bc_program_str                                         -      17     +17
bc_program_func                                        -      17     +17
bc_program_addFunc                                   209     204      -5
bc_program_reset                                      70      64      -6
bc_program_printStream                               163     157      -6
bc_program_print                                     736     730      -6
bc_vm_file                                           226     219      -7
bc_parse_text                                        143     133     -10
bc_parse_reset                                       163     153     -10
bc_parse_endBody                                     375     365     -10
bc_parse_create                                      168     158     -10
bc_parse_addFunc                                      41      31     -10
bc_program_call                                      364     352     -12
bc_program_read                                      350     335     -15
bc_program_execStr                                   528     502     -26
bc_program_exec                                     4219    4179     -40
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 0/14 up/down: 34/-173)         Total: -139 bytes
   text	   data	    bss	    dec	    hex	filename
 985043	    485	   7296	 992824	  f2638	busybox_old
 984904	    485	   7296	 992685	  f25ad	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 30 insertions, 20 deletions

diff --git a/miscutils/bc.c b/miscutils/bc.c
index 450c21c60..3f57f4df8 100644
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -1182,6 +1182,16 @@ static void *bc_vec_item(const BcVec *v, size_t idx)
         return v->v + v->size * idx;
 }
 
+static char** bc_program_str(size_t idx)
+{
+        return bc_vec_item(&G.prog.strs, idx);
+}
+
+static BcFunc* bc_program_func(size_t idx)
+{
+        return bc_vec_item(&G.prog.fns, idx);
+}
+
 static void *bc_vec_item_rev(const BcVec *v, size_t idx)
 {
         return v->v + v->size * (v->len - idx - 1);
@@ -3593,7 +3603,7 @@ static void bc_program_addFunc(char *name, size_t *idx);
 static void bc_parse_addFunc(BcParse *p, char *name, size_t *idx)
 {
         bc_program_addFunc(name, idx);
-        p->func = bc_vec_item(&G.prog.fns, p->fidx);
+        p->func = bc_program_func(p->fidx);
 }
 
 #define bc_parse_push(p, i) bc_vec_pushByte(&(p)->func->code, (char) (i))
@@ -3639,7 +3649,7 @@ static BcStatus bc_parse_text(BcParse *p, const char *text)
 {
         BcStatus s;
 
-        p->func = bc_vec_item(&G.prog.fns, p->fidx);
+        p->func = bc_program_func(p->fidx);
 
         if (!text[0] && !BC_PARSE_CAN_EXEC(p)) {
                 p->l.t.t = BC_LEX_INVALID;
@@ -3662,13 +3672,13 @@ static void bc_program_reset(void)
         bc_vec_npop(&G.prog.stack, G.prog.stack.len - 1);
         bc_vec_pop_all(&G.prog.results);
 
-        f = bc_vec_item(&G.prog.fns, 0);
+        f = bc_program_func(0);
         ip = bc_vec_top(&G.prog.stack);
         ip->idx = f->code.len;
 }
 
 #define bc_parse_updateFunc(p, f) \
-        ((p)->func = bc_vec_item(&G.prog.fns, ((p)->fidx = (f))))
+        ((p)->func = bc_program_func((p)->fidx = (f)))
 
 // Called when bc/dc_parse_parse() detects a failure,
 // resets parsing structures.
@@ -5541,7 +5551,7 @@ static BcStatus bc_program_read(void)
         BcVec buf;
         BcInstPtr ip;
         size_t i;
-        BcFunc *f = bc_vec_item(&G.prog.fns, BC_PROG_READ);
+        BcFunc *f = bc_program_func(BC_PROG_READ);
 
         for (i = 0; i < G.prog.stack.len; ++i) {
                 BcInstPtr *ip_ptr = bc_vec_item(&G.prog.stack, i);
@@ -5576,7 +5586,7 @@ static BcStatus bc_program_read(void)
         ip.len = G.prog.results.len;
 
         // Update this pointer, just in case.
-        f = bc_vec_item(&G.prog.fns, BC_PROG_READ);
+        f = bc_program_func(BC_PROG_READ);
 
         bc_vec_pushByte(&f->code, BC_INST_POP_EXEC);
         bc_vec_push(&G.prog.stack, &ip);
@@ -5725,7 +5735,7 @@ static BcStatus bc_program_print(char inst, size_t idx)
         else {
 
                 idx = (r->t == BC_RESULT_STR) ? r->d.id.idx : num->rdx;
-                str = *((char **) bc_vec_item(&G.prog.strs, idx));
+                str = *bc_program_str(idx);
 
                 if (inst == BC_INST_PRINT_STR) {
                         for (i = 0, len = strlen(str); i < len; ++i) {
@@ -6125,7 +6135,7 @@ static BcStatus bc_program_call(char *code, size_t *idx)
 
         ip.idx = 0;
         ip.func = bc_program_index(code, idx);
-        func = bc_vec_item(&G.prog.fns, ip.func);
+        func = bc_program_func(ip.func);
 
         if (func->code.len == 0) {
                 return bc_error("undefined function");
@@ -6179,7 +6189,7 @@ static BcStatus bc_program_return(char inst)
         if (!BC_PROG_STACK(&G.prog.results, ip->len + inst == BC_INST_RET))
                 return bc_error_stack_has_too_few_elements();
 
-        f = bc_vec_item(&G.prog.fns, ip->func);
+        f = bc_program_func(ip->func);
         res.t = BC_RESULT_TEMP;
 
         if (inst == BC_INST_RET) {
@@ -6265,7 +6275,7 @@ static BcStatus bc_program_builtin(char inst)
                 char **str;
                 size_t idx = opnd->t == BC_RESULT_STR ? opnd->d.id.idx : num->rdx;
 
-                str = bc_vec_item(&G.prog.strs, idx);
+                str = bc_program_str(idx);
                 bc_num_ulong2num(&res.d.n, strlen(*str));
         }
 #endif
@@ -6397,7 +6407,7 @@ static BcStatus bc_program_asciify(void)
         }
         else {
                 idx = (r->t == BC_RESULT_STR) ? r->d.id.idx : num->rdx;
-                str2 = *((char **) bc_vec_item(&G.prog.strs, idx));
+                str2 = *bc_program_str(idx);
                 c = str2[0];
         }
 
@@ -6411,7 +6421,7 @@ static BcStatus bc_program_asciify(void)
         if (idx != len + BC_PROG_REQ_FUNCS) {
 
                 for (idx = 0; idx < G.prog.strs.len; ++idx) {
-                        if (!strcmp(*((char **) bc_vec_item(&G.prog.strs, idx)), str)) {
+                        if (strcmp(*bc_program_str(idx), str) == 0) {
                                 len = idx;
                                 break;
                         }
@@ -6453,7 +6463,7 @@ static BcStatus bc_program_printStream(void)
                 s = bc_num_stream(n, &G.prog.strmb);
         else {
                 idx = (r->t == BC_RESULT_STR) ? r->d.id.idx : n->rdx;
-                str = *((char **) bc_vec_item(&G.prog.strs, idx));
+                str = *bc_program_str(idx);
                 printf("%s", str);
         }
 
@@ -6553,8 +6563,8 @@ static BcStatus bc_program_execStr(char *code, size_t *bgn,
 
         fidx = sidx + BC_PROG_REQ_FUNCS;
 
-        str = bc_vec_item(&G.prog.strs, sidx);
-        f = bc_vec_item(&G.prog.fns, fidx);
+        str = bc_program_str(sidx);
+        f = bc_program_func(fidx);
 
         if (f->code.len == 0) {
                 common_parse_init(&prs, fidx);
@@ -6582,7 +6592,7 @@ static BcStatus bc_program_execStr(char *code, size_t *bgn,
 
 err:
         bc_parse_free(&prs);
-        f = bc_vec_item(&G.prog.fns, fidx);
+        f = bc_program_func(fidx);
         bc_vec_pop_all(&f->code);
 exit:
         bc_vec_pop(&G.prog.results);
@@ -6625,7 +6635,7 @@ static void bc_program_addFunc(char *name, size_t *idx)
 
         if (!inserted) {
 
-                BcFunc *func = bc_vec_item(&G.prog.fns, entry_ptr->idx);
+                BcFunc *func = bc_program_func(entry_ptr->idx);
 
                 // We need to reset these, so the function can be repopulated.
                 func->nparams = 0;
@@ -6646,7 +6656,7 @@ static BcStatus bc_program_exec(void)
         BcResult r, *ptr;
         BcNum *num;
         BcInstPtr *ip = bc_vec_top(&G.prog.stack);
-        BcFunc *func = bc_vec_item(&G.prog.fns, ip->func);
+        BcFunc *func = bc_program_func(ip->func);
         char *code = func->code.v;
         bool cond = false;
 
@@ -6956,7 +6966,7 @@ static BcStatus bc_program_exec(void)
 
                 // If the stack has changed, pointers may be invalid.
                 ip = bc_vec_top(&G.prog.stack);
-                func = bc_vec_item(&G.prog.fns, ip->func);
+                func = bc_program_func(ip->func);
                 code = func->code.v;
         }
 
@@ -7089,7 +7099,7 @@ static BcStatus bc_vm_file(const char *file)
         s = bc_vm_process(data);
         if (s) goto err;
 
-        main_func = bc_vec_item(&G.prog.fns, BC_PROG_MAIN);
+        main_func = bc_program_func(BC_PROG_MAIN);
         ip = bc_vec_item(&G.prog.stack, 0);
 
         if (main_func->code.len < ip->idx)