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/* {{{ Copyright (c) Paul R. Tagliamonte <paultag@debian.org>, 2015
*
* 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. }}} */
package dependency
import (
"errors"
"strings"
)
/*
*/
type Arch struct {
ABI string
OS string
CPU string
}
func ParseArchitectures(arch string) ([]Arch, error) {
ret := []Arch{}
arches := strings.Split(arch, " ")
for _, el := range arches {
el := strings.Trim(el, " \t\n\r")
if el == "" {
continue
}
arch, err := ParseArch(el)
if err != nil {
return nil, err
}
ret = append(ret, *arch)
}
return ret, nil
}
func (arch *Arch) UnmarshalControl(data string) error {
return parseArchInto(arch, data)
}
func ParseArch(arch string) (*Arch, error) {
ret := &Arch{
ABI: "any",
OS: "any",
CPU: "any",
}
return ret, parseArchInto(ret, arch)
}
/*
*/
func parseArchInto(ret *Arch, arch string) error {
/* May be in the following form:
* `any` (implicitly any-any-any)
* kfreebsd-any (implicitly any-kfreebsd-any)
* kfreebsd-amd64 (implicitly any-kfreebsd-any)
* bsd-openbsd-i386 */
flavors := strings.SplitN(arch, "-", 3)
switch len(flavors) {
case 1:
flavor := flavors[0]
/* OK, we've got a single guy like `any` or `amd64` */
switch flavor {
case "all", "any":
ret.ABI = flavor
ret.OS = flavor
ret.CPU = flavor
default:
/* right, so we've got something like `amd64`, which is implicitly
* gnu-linux-amd64. Confusing, I know. */
ret.ABI = "gnu"
ret.OS = "linux"
ret.CPU = flavor
}
case 2:
/* Right, this is something like kfreebsd-amd64, which is implicitly
* gnu-kfreebsd-amd64 */
ret.OS = flavors[0]
ret.CPU = flavors[1]
case 3:
/* This is something like bsd-openbsd-amd64 */
ret.ABI = flavors[0]
ret.OS = flavors[1]
ret.CPU = flavors[2]
default:
return errors.New("Hurm, no idea what happened here")
}
return nil
}
/*
*/
func (set *ArchSet) Matches(other *Arch) bool {
/* If [!amd64 sparc] matches gnu-linux-any */
if len(set.Architectures) == 0 {
/* We're not a thing. Always true. */
return true
}
not := set.Not
for _, el := range set.Architectures {
if el.Is(other) {
/* For each arch; check if it matches. If it does, then
* return true (unless we're negated) */
return !not
}
}
/* Otherwise, let's return false (unless we're negated) */
return not
}
/*
*/
func (arch *Arch) IsWildcard() bool {
if arch.CPU == "all" {
return false
}
if arch.ABI == "any" || arch.OS == "any" || arch.CPU == "any" {
return true
}
return false
}
/*
*/
func (arch *Arch) Is(other *Arch) bool {
if arch.IsWildcard() && other.IsWildcard() {
/* We can't compare wildcards to other wildcards. That's just
* insanity. We always need a concrete arch. Not even going to try. */
return false
} else if arch.IsWildcard() {
/* OK, so we're a wildcard. Let's defer to the other
* struct to deal with this */
return other.Is(arch)
}
if (arch.CPU == other.CPU || (arch.CPU != "all" && other.CPU == "any")) &&
(arch.OS == other.OS || other.OS == "any") &&
(arch.ABI == other.ABI || other.ABI == "any") {
return true
}
return false
}
// vim: foldmethod=marker
|
