--- /dev/null
+/*
+ * This file is part of the libvirt-go project
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * Copyright (c) 2013 Alex Zorin
+ * Copyright (C) 2016 Red Hat, Inc.
+ *
+ */
+
+package libvirt
+
+/*
+#cgo pkg-config: libvirt
+#include <libvirt/libvirt.h>
+#include <libvirt/virterror.h>
+#include <stdlib.h>
+#include <string.h>
+*/
+import "C"
+
+import (
+ "fmt"
+ "unsafe"
+)
+
+type typedParamsFieldInfo struct {
+ set *bool
+ i *int
+ ui *uint
+ l *int64
+ ul *uint64
+ b *bool
+ d *float64
+ s *string
+ sl *[]string
+}
+
+func typedParamsUnpackLen(cparams *C.virTypedParameter, nparams int, infomap map[string]typedParamsFieldInfo) (uint, error) {
+ count := uint(0)
+ for i := 0; i < nparams; i++ {
+ var cparam *C.virTypedParameter
+ cparam = (*C.virTypedParameter)(unsafe.Pointer(uintptr(unsafe.Pointer(cparams)) + unsafe.Sizeof(*cparam)*uintptr(i)))
+ name := C.GoString((*C.char)(unsafe.Pointer(&cparam.field)))
+ info, ok := infomap[name]
+ if !ok {
+ // Ignore unknown keys so that we don't break if
+ // run against a newer libvirt that returns more
+ // parameters than we currently have code to
+ // consume
+ continue
+ }
+ switch cparam._type {
+ case C.VIR_TYPED_PARAM_INT:
+ if info.i == nil {
+ return 0, fmt.Errorf("field %s expects an int", name)
+ }
+ *info.i = int(*(*C.int)(unsafe.Pointer(&cparam.value)))
+ *info.set = true
+ case C.VIR_TYPED_PARAM_UINT:
+ if info.ui == nil {
+ return 0, fmt.Errorf("field %s expects a uint", name)
+ }
+ *info.ui = uint(*(*C.uint)(unsafe.Pointer(&cparam.value)))
+ *info.set = true
+ case C.VIR_TYPED_PARAM_LLONG:
+ if info.l == nil {
+ return 0, fmt.Errorf("field %s expects an int64", name)
+ }
+ *info.l = int64(*(*C.longlong)(unsafe.Pointer(&cparam.value)))
+ *info.set = true
+ case C.VIR_TYPED_PARAM_ULLONG:
+ if info.ul == nil {
+ return 0, fmt.Errorf("field %s expects a uint64", name)
+ }
+ *info.ul = uint64(*(*C.ulonglong)(unsafe.Pointer(&cparam.value)))
+ *info.set = true
+ case C.VIR_TYPED_PARAM_DOUBLE:
+ if info.d == nil {
+ return 0, fmt.Errorf("field %s expects a float64", name)
+ }
+ *info.d = float64(*(*C.double)(unsafe.Pointer(&cparam.value)))
+ *info.set = true
+ case C.VIR_TYPED_PARAM_BOOLEAN:
+ if info.b == nil {
+ return 0, fmt.Errorf("field %s expects a bool", name)
+ }
+ *info.b = *(*C.char)(unsafe.Pointer(&cparam.value)) == 1
+ *info.set = true
+ case C.VIR_TYPED_PARAM_STRING:
+ if info.s != nil {
+ *info.s = C.GoString(*(**C.char)(unsafe.Pointer(&cparam.value)))
+ *info.set = true
+ } else if info.sl != nil {
+ *info.sl = append(*info.sl, C.GoString(*(**C.char)(unsafe.Pointer(&cparam.value))))
+ *info.set = true
+ } else {
+ return 0, fmt.Errorf("field %s expects a string/string list", name)
+ }
+ }
+ count++
+ }
+
+ return count, nil
+}
+
+func typedParamsUnpack(cparams []C.virTypedParameter, infomap map[string]typedParamsFieldInfo) (uint, error) {
+ return typedParamsUnpackLen(&cparams[0], len(cparams), infomap)
+}
+
+func typedParamsPackLen(cparams *C.virTypedParameter, nparams int, infomap map[string]typedParamsFieldInfo) error {
+ stringOffsets := make(map[string]uint)
+
+ for i := 0; i < nparams; i++ {
+ var cparam *C.virTypedParameter
+ cparam = (*C.virTypedParameter)(unsafe.Pointer(uintptr(unsafe.Pointer(cparams)) + unsafe.Sizeof(*cparam)*uintptr(i)))
+ name := C.GoString((*C.char)(unsafe.Pointer(&cparam.field)))
+ info, ok := infomap[name]
+ if !ok {
+ // Ignore unknown keys so that we don't break if
+ // run against a newer libvirt that returns more
+ // parameters than we currently have code to
+ // consume
+ continue
+ }
+ if !*info.set {
+ continue
+ }
+ switch cparam._type {
+ case C.VIR_TYPED_PARAM_INT:
+ if info.i == nil {
+ return fmt.Errorf("field %s expects an int", name)
+ }
+ *(*C.int)(unsafe.Pointer(&cparam.value)) = C.int(*info.i)
+ case C.VIR_TYPED_PARAM_UINT:
+ if info.ui == nil {
+ return fmt.Errorf("field %s expects a uint", name)
+ }
+ *(*C.uint)(unsafe.Pointer(&cparam.value)) = C.uint(*info.ui)
+ case C.VIR_TYPED_PARAM_LLONG:
+ if info.l == nil {
+ return fmt.Errorf("field %s expects an int64", name)
+ }
+ *(*C.longlong)(unsafe.Pointer(&cparam.value)) = C.longlong(*info.l)
+ case C.VIR_TYPED_PARAM_ULLONG:
+ if info.ul == nil {
+ return fmt.Errorf("field %s expects a uint64", name)
+ }
+ *(*C.ulonglong)(unsafe.Pointer(&cparam.value)) = C.ulonglong(*info.ul)
+ case C.VIR_TYPED_PARAM_DOUBLE:
+ if info.d == nil {
+ return fmt.Errorf("field %s expects a float64", name)
+ }
+ *(*C.double)(unsafe.Pointer(&cparam.value)) = C.double(*info.d)
+ case C.VIR_TYPED_PARAM_BOOLEAN:
+ if info.b == nil {
+ return fmt.Errorf("field %s expects a bool", name)
+ }
+ if *info.b {
+ *(*C.char)(unsafe.Pointer(&cparam.value)) = 1
+ } else {
+ *(*C.char)(unsafe.Pointer(&cparam.value)) = 0
+ }
+ case C.VIR_TYPED_PARAM_STRING:
+ if info.s != nil {
+ *(**C.char)(unsafe.Pointer(&cparam.value)) = C.CString(*info.s)
+ } else if info.sl != nil {
+ count := stringOffsets[name]
+ *(**C.char)(unsafe.Pointer(&cparam.value)) = C.CString((*info.sl)[count])
+ stringOffsets[name] = count + 1
+ } else {
+ return fmt.Errorf("field %s expects a string", name)
+ }
+ }
+ }
+
+ return nil
+}
+
+func typedParamsPack(cparams []C.virTypedParameter, infomap map[string]typedParamsFieldInfo) error {
+ return typedParamsPackLen(&cparams[0], len(cparams), infomap)
+}
+
+func typedParamsPackNew(infomap map[string]typedParamsFieldInfo) (*[]C.virTypedParameter, error) {
+ nparams := 0
+ for _, value := range infomap {
+ if !*value.set {
+ continue
+ }
+
+ if value.sl != nil {
+ nparams += len(*value.sl)
+ } else {
+ nparams++
+ }
+ }
+
+ cparams := make([]C.virTypedParameter, nparams)
+ nparams = 0
+ for key, value := range infomap {
+ if !*value.set {
+ continue
+ }
+
+ cfield := C.CString(key)
+ defer C.free(unsafe.Pointer(cfield))
+ clen := len(key) + 1
+ if clen > C.VIR_TYPED_PARAM_FIELD_LENGTH {
+ clen = C.VIR_TYPED_PARAM_FIELD_LENGTH
+ }
+ if value.sl != nil {
+ for i := 0; i < len(*value.sl); i++ {
+ cparam := &cparams[nparams]
+ cparam._type = C.VIR_TYPED_PARAM_STRING
+ C.memcpy(unsafe.Pointer(&cparam.field[0]), unsafe.Pointer(cfield), C.size_t(clen))
+ nparams++
+ }
+ } else {
+ cparam := &cparams[nparams]
+ if value.i != nil {
+ cparam._type = C.VIR_TYPED_PARAM_INT
+ } else if value.ui != nil {
+ cparam._type = C.VIR_TYPED_PARAM_UINT
+ } else if value.l != nil {
+ cparam._type = C.VIR_TYPED_PARAM_LLONG
+ } else if value.ul != nil {
+ cparam._type = C.VIR_TYPED_PARAM_ULLONG
+ } else if value.b != nil {
+ cparam._type = C.VIR_TYPED_PARAM_BOOLEAN
+ } else if value.d != nil {
+ cparam._type = C.VIR_TYPED_PARAM_DOUBLE
+ } else if value.s != nil {
+ cparam._type = C.VIR_TYPED_PARAM_STRING
+ }
+ C.memcpy(unsafe.Pointer(&cparam.field[0]), unsafe.Pointer(cfield), C.size_t(clen))
+ nparams++
+ }
+ }
+
+ err := typedParamsPack(cparams, infomap)
+ if err != nil {
+ C.virTypedParamsClear((*C.virTypedParameter)(unsafe.Pointer(&cparams[0])), C.int(nparams))
+ return nil, err
+ }
+ return &cparams, nil
+}
Code Review / barometer.git / blobdiff