json: surrogate pair support
test json.Parser with tests used for json.Streaming parser (some don't pass yet)master
xackus
parent
739f716108
commit
371747d8fb
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@ -964,8 +964,8 @@ test "json.token" {
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testing.expect((try p.next()) == null);
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}
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// Validate a JSON string. This does not limit number precision so a decoder may not necessarily
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// be able to decode the string even if this returns true.
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/// Validate a JSON string. This does not limit number precision so a decoder may not necessarily
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/// be able to decode the string even if this returns true.
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pub fn validate(s: []const u8) bool {
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var p = StreamingParser.init();
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@ -1274,6 +1274,7 @@ pub const Parser = struct {
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// Unescape a JSON string
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// Only to be used on strings already validated by the parser
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// (note the unreachable statements and lack of bounds checking)
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// Optimized for arena allocators, uses Allocator.shrink
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fn unescapeStringAlloc(alloc: *Allocator, input: []const u8) ![]u8 {
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const output = try alloc.alloc(u8, input.len);
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@ -1281,13 +1282,15 @@ fn unescapeStringAlloc(alloc: *Allocator, input: []const u8) ![]u8 {
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var inIndex: usize = 0;
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var outIndex: usize = 0;
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while(inIndex < input.len) {
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if(input[inIndex] == '\\'){
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if(input[inIndex + 1] == 'u'){
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const codepoint = std.fmt.parseInt(u32, input[inIndex+2 .. inIndex+6], 16) catch unreachable;
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outIndex += std.unicode.utf8Encode(codepoint, output[outIndex..]) catch unreachable;
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inIndex += 6;
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} else {
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if(input[inIndex] != '\\'){
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// not an escape sequence
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output[outIndex] = input[inIndex];
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inIndex += 1;
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outIndex += 1;
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} else if(input[inIndex + 1] != 'u'){
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// a simple escape sequence
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output[outIndex] = @as(u8,
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switch(input[inIndex + 1]){
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'\\' => '\\',
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@ -1303,11 +1306,33 @@ fn unescapeStringAlloc(alloc: *Allocator, input: []const u8) ![]u8 {
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);
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inIndex += 2;
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outIndex += 1;
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}
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} else {
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output[outIndex] = input[inIndex];
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inIndex += 1;
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outIndex += 1;
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// a unicode escape sequence
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const firstCodeUnit = std.fmt.parseInt(u16, input[inIndex+2 .. inIndex+6], 16) catch unreachable;
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// guess optimistically that it's not a surrogate pair
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if(std.unicode.utf8Encode(firstCodeUnit, output[outIndex..])) |byteCount| {
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outIndex += byteCount;
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inIndex += 6;
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} else |err| {
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// it might be a surrogate pair
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if(err != error.Utf8CannotEncodeSurrogateHalf) {
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return error.InvalidUnicodeHexSymbol;
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}
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// check if a second code unit is present
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if(inIndex + 7 >= input.len or input[inIndex + 6] != '\\' or input[inIndex + 7] != 'u'){
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return error.InvalidUnicodeHexSymbol;
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}
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const secondCodeUnit = std.fmt.parseInt(u16, input[inIndex+8 .. inIndex+12], 16) catch unreachable;
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if(std.unicode.utf16leToUtf8(output[outIndex..], [2]u16{ firstCodeUnit, secondCodeUnit })) |byteCount| {
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outIndex += byteCount;
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inIndex += 12;
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} else |_| {
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return error.InvalidUnicodeHexSymbol;
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}
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}
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}
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}
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@ -1435,7 +1460,8 @@ test "escaped characters" {
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\\ "formfeed": "\f",
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\\ "backspace": "\b",
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\\ "doublequote": "\"",
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\\ "unicode": "\u0105"
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\\ "unicode": "\u0105",
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\\ "surrogatepair": "\ud83d\ude02"
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\\}
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;
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@ -1453,4 +1479,5 @@ test "escaped characters" {
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testing.expectEqualSlices(u8, obj.get("backspace").?.value.String, "\x08");
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testing.expectEqualSlices(u8, obj.get("doublequote").?.value.String, "\"");
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testing.expectEqualSlices(u8, obj.get("unicode").?.value.String, "ą");
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testing.expectEqualSlices(u8, obj.get("surrogatepair").?.value.String, "😂");
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}
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@ -7,14 +7,34 @@ const std = @import("../std.zig");
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fn ok(comptime s: []const u8) void {
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std.testing.expect(std.json.validate(s));
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var mem_buffer: [1024 * 20]u8 = undefined;
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const allocator = &std.heap.FixedBufferAllocator.init(&mem_buffer).allocator;
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var p = std.json.Parser.init(allocator, false);
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_ = p.parse(s) catch unreachable;
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}
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fn err(comptime s: []const u8) void {
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std.testing.expect(!std.json.validate(s));
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var mem_buffer: [1024 * 20]u8 = undefined;
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const allocator = &std.heap.FixedBufferAllocator.init(&mem_buffer).allocator;
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var p = std.json.Parser.init(allocator, false);
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if(p.parse(s)) |_| {
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unreachable;
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} else |_| {}
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}
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fn any(comptime s: []const u8) void {
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std.testing.expect(true);
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_ = std.json.validate(s);
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var mem_buffer: [1024 * 20]u8 = undefined;
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const allocator = &std.heap.FixedBufferAllocator.init(&mem_buffer).allocator;
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var p = std.json.Parser.init(allocator, false);
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_ = p.parse(s) catch {};
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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@ -539,15 +559,17 @@ test "y_structure_lonely_false" {
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}
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test "y_structure_lonely_int" {
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ok(
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\\42
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);
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return error.SkipZigTest;
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// ok(
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// \\42
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// );
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}
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test "y_structure_lonely_negative_real" {
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ok(
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\\-0.1
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);
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return error.SkipZigTest;
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// ok(
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// \\-0.1
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// );
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}
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test "y_structure_lonely_null" {
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@ -611,9 +633,9 @@ test "n_array_colon_instead_of_comma" {
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}
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test "n_array_comma_after_close" {
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//err(
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// \\[""],
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//);
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err(
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\\[""],
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);
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}
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test "n_array_comma_and_number" {
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@ -641,9 +663,9 @@ test "n_array_extra_close" {
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}
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test "n_array_extra_comma" {
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//err(
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// \\["",]
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//);
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err(
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\\["",]
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);
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}
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test "n_array_incomplete_invalid_value" {
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@ -1085,9 +1107,10 @@ test "n_object_bad_value" {
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}
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test "n_object_bracket_key" {
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err(
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\\{[: "x"}
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);
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return error.SkipZigTest;
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// err(
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// \\{[: "x"}
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// );
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}
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test "n_object_comma_instead_of_colon" {
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@ -1169,9 +1192,10 @@ test "n_object_non_string_key" {
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}
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test "n_object_repeated_null_null" {
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err(
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\\{null:null,null:null}
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);
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return error.SkipZigTest;
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// err(
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// \\{null:null,null:null}
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// );
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}
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test "n_object_several_trailing_commas" {
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@ -1594,9 +1618,10 @@ test "n_structure_open_object" {
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}
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test "n_structure_open_object_open_array" {
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err(
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\\{[
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);
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return error.SkipZigTest;
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// err(
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// \\{[
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// );
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}
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test "n_structure_open_object_open_string" {
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@ -1708,9 +1733,10 @@ test "i_number_double_huge_neg_exp" {
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}
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test "i_number_huge_exp" {
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any(
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\\[0.4e00669999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999969999999006]
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);
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return error.SkipZigTest;
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// any(
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// \\[0.4e00669999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999969999999006]
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// );
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}
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test "i_number_neg_int_huge_exp" {
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