[libvirt] [PATCH v3 6/9] util: virTypedParams{Filter,PickStrings}

From: Pavel Boldin <pboldin(a)mirantis.com&gt; Add multikey API: * virTypedParamsFilter that returns all the parameters with specified name. * virTypedParamsPickStrings that returns a list with all the values for specified name and string type. Signed-off-by: Pavel Boldin <pboldin(a)mirantis.com&gt; Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- include/libvirt/libvirt-host.h | 11 ++++ src/libvirt_public.syms | 2 + src/util/virtypedparam.c | 113 +++++++++++++++++++++++++++++++++++++++++ tests/virtypedparamtest.c | 99 ++++++++++++++++++++++++++++++++++++ 4 files changed, 225 insertions(+) diff --git a/include/libvirt/libvirt-host.h b/include/libvirt/libvirt-host.h index 070550b..6767527 100644 --- a/include/libvirt/libvirt-host.h +++ b/include/libvirt/libvirt-host.h @@ -249,6 +249,11 @@ virTypedParamsGet (virTypedParameterPtr params, int nparams, const char *name); int +virTypedParamsFilter (virTypedParameterPtr params, + int nparams, + const char *name, + virTypedParameterPtr **ret); +int virTypedParamsGetInt (virTypedParameterPtr params, int nparams, const char *name, @@ -284,6 +289,12 @@ virTypedParamsGetString (virTypedParameterPtr params, const char *name, const char **value); int +virTypedParamsPickStrings(virTypedParameterPtr params, + int nparams, + const char *name, + const char ***values, + size_t *picked); +int virTypedParamsAddInt (virTypedParameterPtr *params, int *nparams, int *maxparams, diff --git a/src/libvirt_public.syms b/src/libvirt_public.syms index 716dd2f..845a0b8 100644 --- a/src/libvirt_public.syms +++ b/src/libvirt_public.syms @@ -713,6 +713,8 @@ LIBVIRT_1.2.15 { LIBVIRT_1.2.16 { global: virDomainSetUserPassword; + virTypedParamsFilter; + virTypedParamsPickStrings; } LIBVIRT_1.2.15; # .... define new API here using predicted next version number .... diff --git a/src/util/virtypedparam.c b/src/util/virtypedparam.c index e91ca99..d88d4a7 100644 --- a/src/util/virtypedparam.c +++ b/src/util/virtypedparam.c @@ -481,6 +481,57 @@ virTypedParamsGet(virTypedParameterPtr params, } +/** + * virTypedParamsFilter: + * @params: array of typed parameters + * @nparams: number of parameters in the @params array + * @name: name of the parameter to find + * @ret: pointer to the returned array + * + * + * Filters @params retaining only the parameters named @name in the + * resulting array @ret. Caller should free the @ret array but not + * the items since they are pointing to the @params elements. + * + * Returns amount of elements in @ret on success, -1 on error. + */ +int +virTypedParamsFilter(virTypedParameterPtr params, + int nparams, + const char *name, + virTypedParameterPtr **ret) +{ + size_t i, alloc = 0, n = 0; + + virResetLastError(); + + virCheckNonNullArgGoto(params, error); + virCheckNonNullArgGoto(name, error); + virCheckNonNullArgGoto(ret, error); + + *ret = NULL; + + for (i = 0; i < nparams; i++) { + if (STREQ(params[i].field, name)) { + if (VIR_RESIZE_N(*ret, alloc, n, 1) < 0) + goto error; + + (*ret)[n] = &params[i]; + + n++; + } + } + + return n; + + error: + if (ret) + VIR_FREE(*ret); + virDispatchError(NULL); + return -1; +} + + #define VIR_TYPED_PARAM_CHECK_TYPE(check_type) \ do { if (param->type != check_type) { \ virReportError(VIR_ERR_INVALID_ARG, \ @@ -749,6 +800,68 @@ virTypedParamsGetString(virTypedParameterPtr params, /** + * virTypedParamsPickStrings: + * @params: array of typed parameters + * @nparams: number of parameters in the @params array + * @name: name of the parameter to find + * @values: array of returned values + * @picked: pointer to the amount of picked strings. + * + * Finds all parameters with desired @name within @params and + * store their values into @values. The @values array is self + * allocated and its length is stored into @picked. When no + * longer needed, caller should free the returned array, but not + * the items since they are taken from @params array. + * + * Returns 0 on success, -1 otherwise. + */ +int +virTypedParamsPickStrings(virTypedParameterPtr params, + int nparams, + const char *name, + const char ***values, + size_t *picked) +{ + size_t i, n; + int nfiltered; + virTypedParameterPtr *filtered = NULL; + + virResetLastError(); + + virCheckNonNullArgGoto(values, error); + virCheckNonNullArgGoto(picked, error); + + nfiltered = virTypedParamsFilter(params, nparams, name, &filtered); + + if (nfiltered < 0) + goto error; + + *values = NULL; + + if (nfiltered && + VIR_ALLOC_N(*values, nfiltered) < 0) + goto error; + + for (n = 0, i = 0; i < nfiltered; i++) { + if (filtered[i]->type == VIR_TYPED_PARAM_STRING) + (*values)[n++] = filtered[i]->value.s; + } + + *picked = n; + + VIR_FREE(filtered); + return 0; + + error: + if (values) + VIR_FREE(*values); + VIR_FREE(filtered); + virDispatchError(NULL); + return -1; +} + + +/** * virTypedParamsAddInt: * @params: pointer to the array of typed parameters * @nparams: number of parameters in the @params array diff --git a/tests/virtypedparamtest.c b/tests/virtypedparamtest.c index 95e22a7..abdddd5 100644 --- a/tests/virtypedparamtest.c +++ b/tests/virtypedparamtest.c @@ -81,6 +81,99 @@ testTypedParamsValidate(const void *opaque) .nparams = PARAMS_SIZE(__VA_ARGS__), static int +testTypedParamsFilter(const void *opaque ATTRIBUTE_UNUSED) +{ + size_t i, nfiltered; + int rv = -1; + virTypedParameter params[] = { + { .field = "bar", .type = VIR_TYPED_PARAM_UINT }, + { .field = "foo", .type = VIR_TYPED_PARAM_INT }, + { .field = "bar", .type = VIR_TYPED_PARAM_UINT }, + { .field = "foo", .type = VIR_TYPED_PARAM_INT }, + { .field = "foobar", .type = VIR_TYPED_PARAM_STRING }, + { .field = "foo", .type = VIR_TYPED_PARAM_INT } + }; + virTypedParameterPtr *filtered = NULL; + + + nfiltered = virTypedParamsFilter(params, ARRAY_CARDINALITY(params), + "foo", &filtered); + if (nfiltered != 3) + goto cleanup; + + for (i = 0; i < nfiltered; i++) { + if (filtered[i] != &params[1 + i * 2]) + goto cleanup; + } + VIR_FREE(filtered); + filtered = NULL; + + nfiltered = virTypedParamsFilter(params, ARRAY_CARDINALITY(params), + "bar", &filtered); + + if (nfiltered != 2) + goto cleanup; + + for (i = 0; i < nfiltered; i++) { + if (filtered[i] != &params[i * 2]) + goto cleanup; + } + + rv = 0; + cleanup: + VIR_FREE(filtered); + return rv; +} + +static int +testTypedParamsPickStrings(const void *opaque ATTRIBUTE_UNUSED) +{ + size_t i, picked; + int rv = -1; + char l = '1'; + const char **strings = NULL; + + virTypedParameter params[] = { + { .field = "bar", .type = VIR_TYPED_PARAM_STRING, + .value = { .s = (char*)"bar1"} }, + { .field = "foo", .type = VIR_TYPED_PARAM_INT }, + { .field = "bar", .type = VIR_TYPED_PARAM_STRING, + .value = { .s = (char*)"bar2"} }, + { .field = "foo", .type = VIR_TYPED_PARAM_INT }, + { .field = "foobar", .type = VIR_TYPED_PARAM_STRING }, + { .field = "bar", .type = VIR_TYPED_PARAM_STRING, + .value = { .s = NULL } }, + { .field = "foo", .type = VIR_TYPED_PARAM_INT }, + { .field = "bar", .type = VIR_TYPED_PARAM_STRING, + .value = { .s = (char*)"bar3"} } + }; + + if (virTypedParamsPickStrings(params, + ARRAY_CARDINALITY(params), + "bar", + &strings, + &picked) < 0) + goto cleanup; + + for (i = 0; i < picked; i++) { + if (i == 2) { + if (strings[i] != NULL) + goto cleanup; + continue; + } + if (!STREQLEN(strings[i], "bar", 3)) + goto cleanup; + if (strings[i][3] != l++) + goto cleanup; + } + + rv = 0; + cleanup: + VIR_FREE(strings); + return rv; +} + +static int testTypedParamsValidator(void) { size_t i; @@ -159,6 +252,12 @@ mymain(void) if (testTypedParamsValidator() < 0) rv = -1; + if (virtTestRun("Filtering", testTypedParamsFilter, NULL) < 0) + rv = -1; + + if (virtTestRun("Picking Strings", testTypedParamsPickStrings, NULL) < 0) + rv = -1; + if (rv < 0) return EXIT_FAILURE; return EXIT_SUCCESS; -- 2.3.6