bc: create a few common functions

function                                             old     new   delta
bc_char_vec_init                                       -      12     +12
bc_vec_pop_all                                         -       8      +8
bc_program_index                                      64      66      +2
bc_vec_string                                         64      61      -3
bc_vec_free                                           27      24      -3
bc_read_line                                         317     314      -3
bc_program_execStr                                   564     561      -3
bc_program_exec                                     4153    4150      -3
bc_program_copyToVar                                 340     336      -4
bc_parse_create                                      175     170      -5
dc_lex_token                                         705     699      -6
bc_program_reset                                      78      72      -6
bc_lex_number                                        305     299      -6
bc_program_read                                      353     343     -10
bc_program_addFunc                                   225     209     -16
bc_vm_run                                           1942    1924     -18
bc_parse_reset                                       181     163     -18
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 1/14 up/down: 22/-104)          Total: -82 bytes
   text	   data	    bss	    dec	    hex	filename
 987600	    485	   7296	 995381	  f3035	busybox_old
 987518	    485	   7296	 995299	  f2fe3	busybox_unstripped

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

1 files changed, 36 insertions, 27 deletions

diff --git a/miscutils/bc.c b/miscutils/bc.c
index d208a0cc6..e05700fb6 100644
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -1041,6 +1041,11 @@ static void bc_vec_init(BcVec *v, size_t esize, BcVecFree dtor)
         v->v = xmalloc(esize * BC_VEC_START_CAP);
 }
 
+static void bc_char_vec_init(BcVec *v)
+{
+        bc_vec_init(v, sizeof(char), NULL);
+}
+
 static void bc_vec_expand(BcVec *v, size_t req)
 {
         if (v->cap < req) {
@@ -1059,6 +1064,11 @@ static void bc_vec_npop(BcVec *v, size_t n)
         }
 }
 
+static void bc_vec_pop_all(BcVec *v)
+{
+        bc_vec_npop(v, v->len);
+}
+
 static void bc_vec_push(BcVec *v, const void *data)
 {
         if (v->len + 1 > v->cap) bc_vec_grow(v, 1);
@@ -1090,7 +1100,7 @@ static void bc_vec_pushAt(BcVec *v, const void *data, size_t idx)
 
 static void bc_vec_string(BcVec *v, size_t len, const char *str)
 {
-        bc_vec_npop(v, v->len);
+        bc_vec_pop_all(v);
         bc_vec_expand(v, len + 1);
         memcpy(v->v, str, len);
         v->len = len;
@@ -1125,7 +1135,7 @@ static void *bc_vec_item_rev(const BcVec *v, size_t idx)
 static void bc_vec_free(void *vec)
 {
         BcVec *v = (BcVec *) vec;
-        bc_vec_npop(v, v->len);
+        bc_vec_pop_all(v);
         free(v->v);
 }
 
@@ -1179,7 +1189,7 @@ static BcStatus bc_read_line(BcVec *vec, const char *prompt)
                 char c;
 
                 bad_chars = 0;
-                bc_vec_npop(vec, vec->len);
+                bc_vec_pop_all(vec);
 
                 fflush_and_check();
 #if ENABLE_FEATURE_BC_SIGNALS
@@ -2635,7 +2645,7 @@ static BcStatus bc_func_insert(BcFunc *f, char *name, bool var)
 
 static void bc_func_init(BcFunc *f)
 {
-        bc_vec_init(&f->code, sizeof(char), NULL);
+        bc_char_vec_init(&f->code);
         bc_vec_init(&f->autos, sizeof(BcId), bc_id_free);
         bc_vec_init(&f->labels, sizeof(size_t), NULL);
         f->nparams = 0;
@@ -2662,7 +2672,7 @@ static void bc_array_copy(BcVec *d, const BcVec *s)
 {
         size_t i;
 
-        bc_vec_npop(d, d->len);
+        bc_vec_pop_all(d);
         bc_vec_expand(d, s->cap);
         d->len = s->len;
 
@@ -2807,7 +2817,7 @@ static BcStatus bc_lex_number(BcLex *l, char start)
         if (len > BC_MAX_NUM)
                 return bc_error("number too long: must be [1, BC_NUM_MAX]");
 
-        bc_vec_npop(&l->t.v, l->t.v.len);
+        bc_vec_pop_all(&l->t.v);
         bc_vec_expand(&l->t.v, len + 1);
         bc_vec_push(&l->t.v, &start);
 
@@ -2855,7 +2865,7 @@ static BcStatus bc_lex_name(BcLex *l)
 static void bc_lex_init(BcLex *l, BcLexNext next)
 {
         l->next = next;
-        bc_vec_init(&l->t.v, sizeof(char), NULL);
+        bc_char_vec_init(&l->t.v);
 }
 
 static void bc_lex_free(BcLex *l)
@@ -3296,7 +3306,7 @@ static BcStatus dc_lex_register(BcLex *l)
                         s = bc_lex_name(l);
         }
         else {
-                bc_vec_npop(&l->t.v, l->t.v.len);
+                bc_vec_pop_all(&l->t.v);
                 bc_vec_pushByte(&l->t.v, l->buf[l->i - 1]);
                 bc_vec_pushByte(&l->t.v, '\0');
                 l->t.t = BC_LEX_NAME;
@@ -3311,7 +3321,7 @@ static BcStatus dc_lex_string(BcLex *l)
         char c;
 
         l->t.t = BC_LEX_STR;
-        bc_vec_npop(&l->t.v, l->t.v.len);
+        bc_vec_pop_all(&l->t.v);
 
         for (c = l->buf[i]; c != 0 && depth; c = l->buf[++i]) {
 
@@ -3510,11 +3520,10 @@ static BcStatus bc_parse_text(BcParse *p, const char *text)
 static void bc_parse_reset(BcParse *p)
 {
         if (p->fidx != BC_PROG_MAIN) {
-
                 p->func->nparams = 0;
-                bc_vec_npop(&p->func->code, p->func->code.len);
-                bc_vec_npop(&p->func->autos, p->func->autos.len);
-                bc_vec_npop(&p->func->labels, p->func->labels.len);
+                bc_vec_pop_all(&p->func->code);
+                bc_vec_pop_all(&p->func->autos);
+                bc_vec_pop_all(&p->func->labels);
 
                 bc_parse_updateFunc(p, BC_PROG_MAIN);
         }
@@ -3524,9 +3533,9 @@ static void bc_parse_reset(BcParse *p)
         p->auto_part = (p->nbraces = 0);
 
         bc_vec_npop(&p->flags, p->flags.len - 1);
-        bc_vec_npop(&p->exits, p->exits.len);
-        bc_vec_npop(&p->conds, p->conds.len);
-        bc_vec_npop(&p->ops, p->ops.len);
+        bc_vec_pop_all(&p->exits);
+        bc_vec_pop_all(&p->conds);
+        bc_vec_pop_all(&p->ops);
 
         bc_program_reset();
 }
@@ -5350,8 +5359,8 @@ static BcStatus bc_program_read(void)
                         return bc_error("read() call inside of a read() call");
         }
 
-        bc_vec_npop(&f->code, f->code.len);
-        bc_vec_init(&buf, sizeof(char), NULL);
+        bc_vec_pop_all(&f->code);
+        bc_char_vec_init(&buf);
 
         s = bc_read_line(&buf, "read> ");
         if (s) goto io_err;
@@ -6379,7 +6388,7 @@ static BcStatus bc_program_execStr(char *code, size_t *bgn,
 err:
         bc_parse_free(&prs);
         f = bc_vec_item(&G.prog.fns, fidx);
-        bc_vec_npop(&f->code, f->code.len);
+        bc_vec_pop_all(&f->code);
 exit:
         bc_vec_pop(&G.prog.results);
         return s;
@@ -6425,9 +6434,9 @@ static void bc_program_addFunc(char *name, size_t *idx)
 
                 // We need to reset these, so the function can be repopulated.
                 func->nparams = 0;
-                bc_vec_npop(&func->autos, func->autos.len);
-                bc_vec_npop(&func->code, func->code.len);
-                bc_vec_npop(&func->labels, func->labels.len);
+                bc_vec_pop_all(&func->autos);
+                bc_vec_pop_all(&func->code);
+                bc_vec_pop_all(&func->labels);
         }
         else {
                 bc_func_init(&f);
@@ -6443,7 +6452,7 @@ static void bc_program_reset(void)
         BcInstPtr *ip;
 
         bc_vec_npop(&G.prog.stack, G.prog.stack.len - 1);
-        bc_vec_npop(&G.prog.results, G.prog.results.len);
+        bc_vec_pop_all(&G.prog.results);
 
         f = bc_vec_item(&G.prog.fns, 0);
         ip = bc_vec_top(&G.prog.stack);
@@ -6683,7 +6692,7 @@ static BcStatus bc_program_exec(void)
 
                         case BC_INST_CLEAR_STACK:
                         {
-                                bc_vec_npop(&G.prog.results, G.prog.results.len);
+                                bc_vec_pop_all(&G.prog.results);
                                 break;
                         }
 
@@ -6896,8 +6905,8 @@ static BcStatus bc_vm_stdin(void)
         G.prog.file = bc_program_stdin_name;
         bc_lex_file(&G.prs.l, bc_program_stdin_name);
 
-        bc_vec_init(&buffer, sizeof(char), NULL);
-        bc_vec_init(&buf, sizeof(char), NULL);
+        bc_char_vec_init(&buffer);
+        bc_char_vec_init(&buf);
         bc_vec_pushByte(&buffer, '\0');
 
         // This loop is complex because the vm tries not to send any lines that end
@@ -6953,7 +6962,7 @@ static BcStatus bc_vm_stdin(void)
                         fputs("ready for more input\n", stderr);
                 }
 
-                bc_vec_npop(&buffer, buffer.len);
+                bc_vec_pop_all(&buffer);
         }
 
         if (str) {