bc: remove extra div/0 test, remove test for string function parameter

function                                             old     new   delta
zbc_program_call                                     354     332     -22
zxc_program_assign                                   426     385     -41
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-63)             Total: -63 bytes

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

1 files changed, 7 insertions, 8 deletions

diff --git a/miscutils/bc.c b/miscutils/bc.c
index 6d8e2d991..3bcda08a8 100644
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -5793,9 +5793,6 @@ static BC_STATUS zxc_program_assign(char inst)
                 RETURN_STATUS(bc_error_bad_assignment());
 
 #if ENABLE_BC
-        if (inst == BC_INST_ASSIGN_DIVIDE && !bc_num_cmp(r, &G.prog.zero))
-                RETURN_STATUS(bc_error("divide by zero"));
-
         if (assign)
                 bc_num_copy(l, r);
         else {
@@ -5960,12 +5957,10 @@ static BC_STATUS zbc_program_call(char *code, size_t *idx)
 {
         BcInstPtr ip;
         size_t i, nparams;
-        BcFunc *func;
         BcId *a;
-        BcResult *arg;
+        BcFunc *func;
 
         nparams = xc_program_index(code, idx);
-        ip.inst_idx = 0;
         ip.func = xc_program_index(code, idx);
         func = xc_program_func(ip.func);
 
@@ -5975,17 +5970,21 @@ static BC_STATUS zbc_program_call(char *code, size_t *idx)
         if (nparams != func->nparams) {
                 RETURN_STATUS(bc_error_fmt("function has %u parameters, but called with %u", func->nparams, nparams));
         }
+        ip.inst_idx = 0;
         ip.results_len_before_call = G.prog.results.len - nparams;
 
         for (i = 0; i < nparams; ++i) {
+                BcResult *arg;
                 BcStatus s;
 
                 a = bc_vec_item(&func->autos, nparams - 1 - i);
                 arg = bc_vec_top(&G.prog.results);
 
-                if ((!a->idx) != (arg->t == XC_RESULT_ARRAY) || arg->t == XC_RESULT_STR)
+                if ((!a->idx) != (arg->t == XC_RESULT_ARRAY) // array/variable mismatch
+                // || arg->t == XC_RESULT_STR - impossible, f("str") is not a legal syntax (strings are not bc expressions)
+                ) {
                         RETURN_STATUS(bc_error_variable_is_wrong_type());
-
+                }
                 s = zxc_program_copyToVar(a->name, a->idx);
                 if (s) RETURN_STATUS(s);
         }