diff options
Diffstat (limited to 'src/dma/vendor/github.com/libvirt/libvirt-go/typedparams.go')
| -rw-r--r-- | src/dma/vendor/github.com/libvirt/libvirt-go/typedparams.go | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/src/dma/vendor/github.com/libvirt/libvirt-go/typedparams.go b/src/dma/vendor/github.com/libvirt/libvirt-go/typedparams.go new file mode 100644 index 00000000..e8ceae07 --- /dev/null +++ b/src/dma/vendor/github.com/libvirt/libvirt-go/typedparams.go @@ -0,0 +1,262 @@ +/* + * 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 +} |