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| author | Brian Foley <bpfoley@google.com> | 2019-09-05 10:46:22 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2019-09-05 10:46:22 +0200 |
| commit | 7454879a1d9e3948a9af21e31e9d59d5ae8b89f2 (patch) | |
| tree | bf127bd4540a12f52ff6af0a0260b7a1f3222149 | |
| parent | 22a633962786a7bc97870ced913fc237143cfd68 (diff) | |
| download | busybox-7454879a1d9e3948a9af21e31e9d59d5ae8b89f2.tar.gz | |
dc: execute shouldn't pop if stack head is not a string
This matches the behaviour of both GNU dc (as specified in
its man page), and BSD dc (where stack_popstring() pops
only if the head is a string.)
Add a couple of tests to verify this behavior.
function old new delta
zxc_vm_process 6882 6884 +2
Signed-off-by: Brian Foley <bpfoley@google.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | miscutils/bc.c | 3 | ||||
| -rwxr-xr-x | testsuite/dc.tests | 10 |
2 files changed, 12 insertions, 1 deletions
diff --git a/miscutils/bc.c b/miscutils/bc.c index 7ac30dd53..4a3ae49c5 100644 --- a/miscutils/bc.c +++ b/miscutils/bc.c @@ -6521,7 +6521,7 @@ static BC_STATUS zdc_program_execStr(char *code, size_t *bgn, bool cond) if (s || !BC_PROG_STR(n)) goto exit; sidx = n->rdx; } else - goto exit; + goto exit_nopop; } fidx = sidx + BC_PROG_REQ_FUNCS; @@ -6561,6 +6561,7 @@ static BC_STATUS zdc_program_execStr(char *code, size_t *bgn, bool cond) RETURN_STATUS(BC_STATUS_SUCCESS); exit: bc_vec_pop(&G.prog.results); + exit_nopop: RETURN_STATUS(s); } #define zdc_program_execStr(...) (zdc_program_execStr(__VA_ARGS__) COMMA_SUCCESS) diff --git a/testsuite/dc.tests b/testsuite/dc.tests index 8c3af4156..f74e3f0f5 100755 --- a/testsuite/dc.tests +++ b/testsuite/dc.tests @@ -44,6 +44,16 @@ testing "dc complex without spaces (multiple args)" \ optional FEATURE_DC_BIG # All tests below depend on FEATURE_DC_BIG +testing "dc: x should execute strings" \ + "dc -e'[40 2 +] x f'" \ + "42\n" \ + "" "" + +testing "dc: x should not execute or pop non-strings" \ + "dc -e'42 x f'" \ + "42\n" \ + "" "" + testing "dc read" \ "dc -finput" \ "2\n9\n1\n" \ |