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bytes: []const u8,
pub const SectionIterator = struct {
ini: Ini,
next_index: ?usize,
header: []const u8,
pub fn next(it: *SectionIterator) ?[]const u8 {
const bytes = it.ini.bytes;
const start = it.next_index orelse return null;
const end = mem.indexOfPos(u8, bytes, start, "\n[") orelse bytes.len;
const result = bytes[start..end];
if (mem.indexOfPos(u8, bytes, start, it.header)) |next_index| {
it.next_index = next_index + it.header.len;
} else {
it.next_index = null;
}
return result;
}
};
/// Asserts that `header` includes "\n[" at the beginning and "]\n" at the end.
/// `header` must remain valid for the lifetime of the iterator.
pub fn iterateSection(ini: Ini, header: []const u8) SectionIterator {
assert(mem.startsWith(u8, header, "\n["));
assert(mem.endsWith(u8, header, "]\n"));
const first_header = header[1..];
const next_index = if (mem.indexOf(u8, ini.bytes, first_header)) |i|
i + first_header.len
else
null;
return .{
.ini = ini,
.next_index = next_index,
.header = header,
};
}
const std = @import("std.zig");
const mem = std.mem;
const assert = std.debug.assert;
const Ini = @This();
const testing = std.testing;
test iterateSection {
const example =
\\[package]
\\name=libffmpeg
\\version=5.1.2
\\
\\[dependency]
\\id=libz
\\url=url1
\\
\\[dependency]
\\id=libmp3lame
\\url=url2
;
var ini: Ini = .{ .bytes = example };
var it = ini.iterateSection("\n[dependency]\n");
const section1 = it.next() orelse return error.TestFailed;
try testing.expectEqualStrings("id=libz\nurl=url1\n", section1);
const section2 = it.next() orelse return error.TestFailed;
try testing.expectEqualStrings("id=libmp3lame\nurl=url2", section2);
try testing.expect(it.next() == null);
}
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