564 lines
18 KiB
D
564 lines
18 KiB
D
module vibe.core.path;
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import std.algorithm.searching : commonPrefix, endsWith, startsWith;
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import std.algorithm.comparison : min;
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import std.algorithm.iteration : map;
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import std.exception : enforce;
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import std.range : popFrontExactly, takeExactly;
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import std.range.primitives : ElementType, isInputRange;
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/** Computes the relative path from `base_path` to this path.
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Params:
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path = The destination path
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base_path = The path from which the relative path starts
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See_also: `relativeToWeb`
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*/
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Path relativeTo(Path path, Path base_path)
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@safe {
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import std.array : replicate;
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import std.array : array;
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assert(path.absolute && base_path.absolute, "Both arguments to relativeTo must be absolute paths.");
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if (path.type == PathType.windows) {
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// a path such as ..\C:\windows is not valid, so force the path to stay absolute in this case
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if (path.absolute && !path.empty &&
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(path.front.toString().endsWith(":") && !base_path.startsWith(path[0 .. 1]) ||
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path.front == "\\" && !base_path.startsWith(path[0 .. min(2, $)])))
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{
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return path;
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}
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}
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size_t base = commonPrefix(path[], base_path[]).length;
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auto ret = Path("../".replicate(base_path.length - base), path.type) ~ path[base .. $];
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if (path.endsWithSlash && !ret.endsWithSlash) ret ~= Path("./");
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return ret;
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}
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///
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unittest {
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with (PathType) {
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import std.array : array;
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import std.conv : to;
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assert(Path("/some/path", posix).relativeTo(Path("/", posix)) == Path("some/path", posix));
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assert(Path("/some/path/", posix).relativeTo(Path("/some/other/path/", posix)) == Path("../../path/", posix));
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assert(Path("/some/path/", posix).relativeTo(Path("/some/other/path", posix)) == Path("../../path/", posix));
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assert(Path("C:\\some\\path", windows).relativeTo(Path("C:\\", windows)) == Path("some\\path", windows));
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assert(Path("C:\\some\\path\\", windows).relativeTo(Path("C:\\some\\other\\path/", windows)) == Path("..\\..\\path\\", windows));
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assert(Path("C:\\some\\path\\", windows).relativeTo(Path("C:\\some\\other\\path", windows)) == Path("..\\..\\path\\", windows));
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assert(Path("\\\\server\\some\\path", windows).relativeTo(Path("\\\\server\\", windows)) == Path("some\\path", windows));
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assert(Path("\\\\server\\some\\path\\", windows).relativeTo(Path("\\\\server\\some\\other\\path/", windows)) == Path("..\\..\\path\\", windows));
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assert(Path("\\\\server\\some\\path\\", windows).relativeTo(Path("\\\\server\\some\\other\\path", windows)) == Path("..\\..\\path\\", windows));
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assert(Path("C:\\some\\path", windows).relativeTo(Path("D:\\", windows)) == Path("C:\\some\\path", windows));
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assert(Path("C:\\some\\path\\", windows).relativeTo(Path("\\\\server\\share", windows)) == Path("C:\\some\\path\\", windows));
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assert(Path("\\\\server\\some\\path\\", windows).relativeTo(Path("C:\\some\\other\\path", windows)) == Path("\\\\server\\some\\path\\", windows));
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}
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}
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/** Computes the relative path to this path from `base_path` using web path rules.
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The difference to `relativeTo` is that a path not ending in a slash
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will not be considered as a path to a directory and the parent path
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will instead be used.
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Params:
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path = The destination path
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base_path = The path from which the relative path starts
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See_also: `relativeTo`
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*/
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Path relativeToWeb(Path path, Path base_path)
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@safe {
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if (!base_path.endsWithSlash) {
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if (base_path.length > 0) base_path = base_path.parentPath;
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else base_path = Path("/", path.type);
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}
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return path.relativeTo(base_path);
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}
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///
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unittest {
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with (PathType) {
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assert(Path("/some/path", inet).relativeToWeb(Path("/", inet)) == Path("some/path", inet));
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assert(Path("/some/path/", inet).relativeToWeb(Path("/some/other/path/", inet)) == Path("../../path/", inet));
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assert(Path("/some/path/", inet).relativeToWeb(Path("/some/other/path", inet)) == Path("../path/", inet));
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}
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}
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struct Path {
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@safe:
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private {
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string m_path;
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size_t m_length;
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size_t m_nextEntry = size_t.max;
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PathType m_type;
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bool m_absolute;
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}
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this(string p, PathType type = PathType.native)
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nothrow @nogc
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{
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import std.range.primitives : walkLength;
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m_path = p;
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m_type = type;
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setupPath();
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}
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@property bool absolute() const nothrow @nogc { return m_absolute; }
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@property bool empty() const nothrow @nogc { return m_path.length == 0; }
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@property size_t length() const nothrow @nogc { return m_length; }
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@property PathType type() const nothrow @nogc { return m_type; }
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@property PathEntry front() const nothrow @nogc { return PathEntry(m_path[0 .. m_nextEntry], m_type, m_absolute); }
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@property Path save() const nothrow @nogc { return this; }
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@property bool endsWithSlash()
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const nothrow @nogc {
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import std.algorithm.comparison : among;
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final switch (m_type) {
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case PathType.posix, PathType.inet:
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return m_path.length > 0 && m_path[$-1] == '/';
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case PathType.windows:
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return m_path.length > 0 && m_path[$-1].among('/', '\\');
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}
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}
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@property void endsWithSlash(bool v)
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nothrow {
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bool ews = this.endsWithSlash;
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final switch (m_type) {
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case PathType.posix, PathType.inet:
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if (!ews && v) m_path ~= '/';
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else if (ews && !v) m_path = m_path[0 .. $-1]; // FIXME: "/test//" -> "/test/"
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break;
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case PathType.windows:
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if (!ews && v) m_path ~= '\\';
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else if (ews && !v) m_path = m_path[0 .. $-1]; // FIXME: "/test//" -> "/test/"
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break;
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}
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}
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void popFront()
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nothrow @nogc {
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import std.string : indexOf;
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m_path = m_path[min(m_nextEntry, $) .. $];
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m_absolute = false;
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final switch (m_type) {
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case PathType.posix, PathType.inet:
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auto idx = m_path.indexOf('/');
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m_nextEntry = idx >= 0 ? idx+1 : m_path.length;
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break;
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case PathType.windows:
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auto idx = m_path.indexOf('\\');
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auto idx2 = m_path[0 .. idx >= 0 ? idx : $].indexOf('/');
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m_nextEntry = idx2 >= 0 ? idx2+1 : idx >= 0 ? idx+1 : m_path.length;
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break;
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}
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}
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Path parentPath()
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@nogc {
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import std.string : lastIndexOf;
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auto idx = m_path.lastIndexOf('/');
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version (Windows) {
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auto idx2 = m_path.lastIndexOf('\\');
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if (idx2 > idx) idx = idx2;
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}
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// FIXME: handle Windows root path cases
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static const Exception e = new Exception("Path has no parent path");
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if (idx <= 0) throw e;
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return Path(m_path[0 .. idx+1]);
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}
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void normalize()
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{
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import std.array : join;
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auto ews = this.endsWithSlash;
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PathEntry[] newnodes;
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foreach (n; this[]) {
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switch(n.toString()){
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default: newnodes ~= n; break;
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case "", ".": break;
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case "..":
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enforce(!this.absolute || newnodes.length > 0, "Path goes below root node.");
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if( newnodes.length > 0 && newnodes[$-1] != ".." ) newnodes = newnodes[0 .. $-1];
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else newnodes ~= n;
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break;
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}
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}
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final switch (m_type) {
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case PathType.posix, PathType.inet:
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m_path = newnodes.map!(n => n.toString()).join('/');
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if (m_absolute) m_path = '/' ~ m_path;
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if (ews) m_path ~= '/';
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setupPath();
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break;
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case PathType.windows:
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m_path = newnodes.map!(n => n.toString()).join('\\');
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if (ews) m_path ~= '\\';
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setupPath();
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break;
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}
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}
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string toString() const nothrow @nogc { return m_path; }
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string toString(PathType type) const nothrow {
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import std.array : join;
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if (m_type == type) return m_path;
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if (type == PathType.windows) {
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return this[].map!(p => p.toString()).join('\\');
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} else {
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if (m_type == PathType.windows) {
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if (m_absolute) return '/' ~ this[].map!(n => n.toString()).join('/');
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else return this[].map!(n => n.toString()).join('/');
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} else return m_path;
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}
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}
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string toNativeString() const nothrow { return toString(PathType.native); }
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Path opSlice() const nothrow @nogc { return this; }
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Path opSlice(size_t from, size_t to)
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const nothrow @nogc {
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Path ret = this;
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foreach (i; 0 .. from) ret.popFront();
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auto rs = ret.toString();
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foreach (i; from .. to) ret.popFront();
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return Path(rs[0 .. $-ret.toString().length], m_type);
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}
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size_t opDollar() const nothrow @nogc { return m_length; }
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PathEntry opIndex(size_t idx) const nothrow @nogc { auto ret = this[]; ret.popFrontExactly(idx); return ret.front; }
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Path opBinary(string op : "~")(string subpath) nothrow { return this ~ Path(subpath); }
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Path opBinary(string op : "~")(Path subpath) nothrow {
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assert(!subpath.absolute || m_path.length == 0, "Cannot append absolute path.");
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if (this.endsWithSlash)
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return Path(m_path ~ subpath.m_path, m_type);
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if (!m_path.length) return subpath;
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final switch (m_type) {
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case PathType.inet, PathType.posix:
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return Path(m_path ~ '/' ~ subpath.m_path, m_type);
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case PathType.windows:
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return Path(m_path ~ '\\' ~ subpath.m_path, m_type);
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}
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}
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Path opBinary(string op : "~", R)(R entries) nothrow
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if (!is(R == Path) && isInputRange!R && is(ElementType!R == PathEntry))
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{
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import std.array : join;
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final switch (m_type) {
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case PathType.inet, PathType.posix:
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auto rpath = entries.map!(e => e.toString()).join('/');
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if (this.empty) return Path(rpath, m_type);
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if (this.endsWithSlash) return Path(m_path ~ rpath, m_type);
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return Path(m_path ~ '/' ~ rpath, m_type);
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case PathType.windows:
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auto rpath = entries.map!(e => e.toString()).join('\\');
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if (this.empty) return Path(rpath, m_type);
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if (this.endsWithSlash) return Path(m_path ~ rpath, m_type);
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return Path(m_path ~ '\\' ~ rpath, m_type);
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}
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}
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void opOpAssign(string op : "~", T)(T op) { this = this ~ op; }
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bool opEquals(Path other) const @nogc { import std.algorithm.comparison : equal; return this[].equal(other); }
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private void setupPath()
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nothrow @nogc {
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auto ap = getAbsolutePrefix(m_path, type);
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if (ap.length) {
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m_nextEntry = ap.length;
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m_absolute = true;
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} else {
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m_nextEntry = 0;
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popFront();
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}
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auto pr = this;
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while (!pr.empty) {
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m_length++;
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pr.popFront();
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}
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}
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}
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unittest {
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import std.algorithm.comparison : equal;
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with (PathType) {
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assert(Path("hello/world", posix).equal([PathEntry("hello/", posix), PathEntry("world", posix)]));
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assert(Path("/hello/world/", posix).equal([PathEntry("/", posix), PathEntry("hello/", posix), PathEntry("world/", posix)]));
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assert(Path("hello\\world", posix).equal([PathEntry("hello\\world", posix)]));
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assert(Path("hello/world", windows).equal([PathEntry("hello/", windows), PathEntry("world", windows)]));
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assert(Path("/hello/world/", windows).equal([PathEntry("/", windows), PathEntry("hello/", windows), PathEntry("world/", windows)]));
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assert(Path("hello\\w/orld", windows).equal([PathEntry("hello\\", windows), PathEntry("w/", windows), PathEntry("orld", windows)]));
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assert(Path("hello/w\\orld", windows).equal([PathEntry("hello/", windows), PathEntry("w\\", windows), PathEntry("orld", windows)]));
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}
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}
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unittest
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{
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import std.algorithm.comparison : equal;
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{
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auto unc = "\\\\server\\share\\path";
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auto uncp = Path(unc, PathType.windows);
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assert(uncp.absolute);
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uncp.normalize();
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version(Windows) assert(uncp.toNativeString() == unc);
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assert(uncp.absolute);
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assert(!uncp.endsWithSlash);
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}
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{
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auto abspath = "/test/path/";
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auto abspathp = Path(abspath, PathType.posix);
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assert(abspathp.toString() == abspath);
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version(Windows) {} else assert(abspathp.toNativeString() == abspath);
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assert(abspathp.absolute);
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assert(abspathp.endsWithSlash);
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assert(abspathp.length == 3);
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assert(abspathp[0] == "");
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assert(abspathp[1] == "test");
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assert(abspathp[2] == "path");
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}
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{
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auto relpath = "test/path/";
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auto relpathp = Path(relpath, PathType.posix);
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assert(relpathp.toString() == relpath);
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version(Windows) assert(relpathp.toNativeString() == "test\\path\\");
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else assert(relpathp.toNativeString() == relpath);
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assert(!relpathp.absolute);
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assert(relpathp.endsWithSlash);
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assert(relpathp.length == 2);
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assert(relpathp[0] == "test");
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assert(relpathp[1] == "path");
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}
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{
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auto winpath = "C:\\windows\\test";
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auto winpathp = Path(winpath, PathType.windows);
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assert(winpathp.toString() == "C:\\windows\\test");
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assert(winpathp.toString(PathType.posix) == "/C:/windows/test");
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version(Windows) assert(winpathp.toNativeString() == winpath);
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else assert(winpathp.toNativeString() == "/C:/windows/test");
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assert(winpathp.absolute);
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assert(!winpathp.endsWithSlash);
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assert(winpathp.length == 3);
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assert(winpathp[0] == "C:");
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assert(winpathp[1] == "windows");
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assert(winpathp[2] == "test");
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}
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{
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auto dotpath = "/test/../test2/././x/y";
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auto dotpathp = Path(dotpath, PathType.posix);
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assert(dotpathp.toString() == "/test/../test2/././x/y");
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dotpathp.normalize();
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assert(dotpathp.toString() == "/test2/x/y", dotpathp.toString());
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}
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{
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auto dotpath = "/test/..////test2//./x/y";
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auto dotpathp = Path(dotpath, PathType.posix);
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assert(dotpathp.toString() == "/test/..////test2//./x/y");
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dotpathp.normalize();
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assert(dotpathp.toString() == "/test2/x/y");
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}
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{
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auto parentpath = "/path/to/parent";
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auto parentpathp = Path(parentpath, PathType.posix);
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auto subpath = "/path/to/parent/sub/";
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auto subpathp = Path(subpath, PathType.posix);
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auto subpath_rel = "sub/";
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assert(subpathp.relativeTo(parentpathp).toString() == subpath_rel);
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auto subfile = "/path/to/parent/child";
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auto subfilep = Path(subfile, PathType.posix);
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auto subfile_rel = "child";
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assert(subfilep.relativeTo(parentpathp).toString() == subfile_rel);
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}
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{ // relative paths across Windows devices are not allowed
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auto p1 = Path("\\\\server\\share", PathType.windows); assert(p1.absolute);
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auto p2 = Path("\\\\server\\othershare", PathType.windows); assert(p2.absolute);
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auto p3 = Path("\\\\otherserver\\share", PathType.windows); assert(p3.absolute);
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auto p4 = Path("C:\\somepath", PathType.windows); assert(p4.absolute);
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auto p5 = Path("C:\\someotherpath", PathType.windows); assert(p5.absolute);
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auto p6 = Path("D:\\somepath", PathType.windows); assert(p6.absolute);
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assert(p4.relativeTo(p5) == Path("../somepath", PathType.windows));
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assert(p4.relativeTo(p6) == Path("C:\\somepath", PathType.windows));
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assert(p4.relativeTo(p1) == Path("C:\\somepath", PathType.windows));
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assert(p1.relativeTo(p2) == Path("../share", PathType.windows));
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assert(p1.relativeTo(p3) == Path("\\\\server\\share", PathType.windows));
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assert(p1.relativeTo(p4) == Path("\\\\server\\share", PathType.windows));
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}
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{ // relative path, trailing slash
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auto p1 = Path("/some/path", PathType.posix);
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auto p2 = Path("/some/path/", PathType.posix);
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assert(p1.relativeTo(p1).toString() == "");
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assert(p1.relativeTo(p2).toString() == "");
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assert(p2.relativeTo(p2).toString() == "./");
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}
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assert(Path("").empty);
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assert(Path("a/b/c")[1 .. 3].map!(p => p.toString()).equal(["b", "c"]));
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assert(Path("/", PathType.posix) ~ Path("foo/bar") == Path("/foo/bar"));
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assert(Path("", PathType.posix) ~ Path("foo/bar") == Path("foo/bar"));
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assert(Path("foo", PathType.posix) ~ Path("bar") == Path("foo/bar"));
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assert(Path("foo/", PathType.posix) ~ Path("bar") == Path("foo/bar"));
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}
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struct PathEntry {
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import std.string : cmp;
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static PathEntry validateFilename(string fname)
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@safe {
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import std.string : indexOfAny;
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enforce(fname.indexOfAny("/\\") < 0, "File name contains forward or backward slashes: "~fname);
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return PathEntry(fname, PathType.inet);
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}
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@safe pure nothrow:
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private {
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string m_name;
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bool m_hasSeparator;
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}
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this(string str, PathType pt, bool is_absolute_prefix = false)
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@nogc {
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import std.algorithm.searching : any;
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m_name = str;
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if (m_name.length > 0) {
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final switch (pt) {
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case PathType.inet, PathType.posix:
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m_hasSeparator = m_name[$-1] == '/';
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break;
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case PathType.windows:
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m_hasSeparator = m_name[$-1] == '/' || m_name[$-1] == '\\';
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break;
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}
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}
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debug if (!is_absolute_prefix)
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foreach (char ch; str[0 .. $-min(1, $)]) {
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assert(ch != '/', "Invalid path entry.");
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if (pt == PathType.windows)
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assert(ch != '\\', "Invalid Windows path entry.");
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}
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}
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alias toString this;
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string toString() const @nogc { return m_name[0 .. m_hasSeparator ? $-1 : $]; }
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string toFullString() const @nogc { return m_name; }
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Path opBinary(string OP)(PathEntry rhs) const if( OP == "~" ) { return Path([this, rhs], false); }
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bool opEquals(ref const PathEntry rhs) const @nogc { return this == rhs.toString(); }
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bool opEquals(PathEntry rhs) const @nogc { return this == rhs.toString(); }
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bool opEquals(string rhs) const @nogc { return this.toString() == rhs; }
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int opCmp(ref const PathEntry rhs) const @nogc { return this.toString().cmp(rhs.toString()); }
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int opCmp(string rhs) const @nogc { return this.toString().cmp(rhs); }
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}
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|
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enum PathType {
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|
posix,
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windows,
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inet,
|
|
native = isWindows ? windows : posix
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|
}
|
|
|
|
private string getAbsolutePrefix(string path, PathType type)
|
|
@safe nothrow @nogc {
|
|
import std.string : indexOfAny;
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|
import std.algorithm.comparison : among;
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|
|
|
final switch (type) {
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|
case PathType.posix, PathType.inet:
|
|
if (path.length > 0 && path[0] == '/')
|
|
return path[0 .. 1];
|
|
return null;
|
|
case PathType.windows:
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|
if (path.length >= 2 && path[0 .. 2] == "\\\\")
|
|
return path[0 .. 2];
|
|
foreach (i; 1 .. path.length)
|
|
if (path[i].among!('/', '\\')) {
|
|
if (path[i-1] == ':')
|
|
return path[0 .. i+1];
|
|
break;
|
|
}
|
|
return null;
|
|
}
|
|
}
|
|
|
|
unittest {
|
|
assert(getAbsolutePrefix("/", PathType.posix) == "/");
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|
assert(getAbsolutePrefix("/test", PathType.posix) == "/");
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|
assert(getAbsolutePrefix("/test/", PathType.posix) == "/");
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assert(getAbsolutePrefix("test/", PathType.posix) == "");
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assert(getAbsolutePrefix("", PathType.posix) == "");
|
|
assert(getAbsolutePrefix("./", PathType.posix) == "");
|
|
|
|
assert(getAbsolutePrefix("/", PathType.inet) == "/");
|
|
assert(getAbsolutePrefix("/test", PathType.inet) == "/");
|
|
assert(getAbsolutePrefix("/test/", PathType.inet) == "/");
|
|
assert(getAbsolutePrefix("test/", PathType.inet) == "");
|
|
assert(getAbsolutePrefix("", PathType.inet) == "");
|
|
assert(getAbsolutePrefix("./", PathType.inet) == "");
|
|
|
|
assert(getAbsolutePrefix("/test", PathType.windows) == "");
|
|
assert(getAbsolutePrefix("\\test", PathType.windows) == "");
|
|
assert(getAbsolutePrefix("C:\\", PathType.windows) == "C:\\");
|
|
assert(getAbsolutePrefix("C:\\test", PathType.windows) == "C:\\");
|
|
assert(getAbsolutePrefix("C:\\test\\", PathType.windows) == "C:\\");
|
|
assert(getAbsolutePrefix("C:/", PathType.windows) == "C:/");
|
|
assert(getAbsolutePrefix("C:/test", PathType.windows) == "C:/");
|
|
assert(getAbsolutePrefix("C:/test/", PathType.windows) == "C:/");
|
|
assert(getAbsolutePrefix("\\\\server", PathType.windows) == "\\\\");
|
|
assert(getAbsolutePrefix("\\\\server\\", PathType.windows) == "\\\\");
|
|
assert(getAbsolutePrefix("\\\\.\\", PathType.windows) == "\\\\");
|
|
assert(getAbsolutePrefix("\\\\?\\", PathType.windows) == "\\\\");
|
|
}
|
|
|
|
version (Windows) private enum isWindows = true;
|
|
else private enum isWindows = false;
|