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const c = @import("c.zig").c;
const std = @import("std");
const debug = @import("std").debug;
pub fn expectEvent(parser: *c.yaml_parser_t, expectedType: c.yaml_event_type_t) !void {
var event: c.yaml_event_t = undefined;
if (c.yaml_parser_parse(parser, &event) != 1)
return error.YAMLParserError;
defer c.yaml_event_delete(&event);
if (event.type != expectedType) {
debug.print("unexpected event: {}\n", .{event.type});
return error.InvalidConfiguration;
}
}
pub fn parseStringEvent(event: *c.yaml_event_t, allocator: std.mem.Allocator) ![]const u8 {
if (event.type != c.YAML_SCALAR_EVENT)
return error.InvalidType;
const data = event.data.scalar;
const value: []const u8 = data.value[0..data.length];
return try allocator.dupe(u8, value);
}
pub fn parseString(parser: *c.yaml_parser_t, allocator: std.mem.Allocator) ![]const u8 {
var event: c.yaml_event_t = undefined;
if (c.yaml_parser_parse(parser, &event) != 1)
return error.YAMLParserError;
defer c.yaml_event_delete(&event);
return parseStringEvent(&event, allocator);
}
pub fn parseInt(parser: *c.yaml_parser_t, comptime T: type) !T {
var event: c.yaml_event_t = undefined;
if (c.yaml_parser_parse(parser, &event) != 1)
return error.YAMLParserError;
defer c.yaml_event_delete(&event);
if (event.type != c.YAML_SCALAR_EVENT)
return error.InvalidType;
const data = event.data.scalar;
const value: []const u8 = data.value[0..data.length];
return try std.fmt.parseInt(T, value, 10);
}
pub fn parseEnum(parser: *c.yaml_parser_t, comptime T: type) !T {
var event: c.yaml_event_t = undefined;
if (c.yaml_parser_parse(parser, &event) != 1)
return error.YAMLParserError;
defer c.yaml_event_delete(&event);
if (event.type != c.YAML_SCALAR_EVENT)
return error.InvalidType;
const data = event.data.scalar;
const value: []const u8 = data.value[0..data.length];
inline for (@typeInfo(T).@"enum".fields) |field| {
if (std.mem.eql(u8, value, field.name))
return @field(T, field.name);
}
return error.InvalidValue;
}
pub fn parseUnion(parser: *c.yaml_parser_t, comptime T: type, allocator: std.mem.Allocator) !T {
_ = parser;
_ = allocator;
// sorry, i lost this code in a git accident and have since moved on 🤡
unreachable;
}
pub fn parseBool(parser: *c.yaml_parser_t) !bool {
var event: c.yaml_event_t = undefined;
if (c.yaml_parser_parse(parser, &event) != 1)
return error.YAMLParserError;
defer c.yaml_event_delete(&event);
if (event.type != c.YAML_SCALAR_EVENT)
return error.InvalidType;
const data = event.data.scalar;
const value: []const u8 = data.value[0..data.length];
if (data.style != c.YAML_PLAIN_SCALAR_STYLE)
return false;
return std.mem.eql(u8, value, "true") or std.mem.eql(u8, value, "1");
}
pub fn skipAny(parser: *c.yaml_parser_t) !void {
var event: c.yaml_event_t = undefined;
var depth: u32 = 0;
while (true) {
if (c.yaml_parser_parse(parser, &event) != 1)
return error.YAMLParserError;
defer c.yaml_event_delete(&event);
switch (event.type) {
c.YAML_SCALAR_EVENT => {
if (depth == 0)
break;
},
c.YAML_SEQUENCE_START_EVENT,
c.YAML_MAPPING_START_EVENT,
=> depth += 1,
c.YAML_SEQUENCE_END_EVENT,
c.YAML_MAPPING_END_EVENT,
=> {
depth -= 1;
if (depth == 0)
break;
},
else => {
debug.print("unexpected event: {}\n", .{event.type});
return error.InvalidConfiguration;
},
}
}
}
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