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//! FAT32 Stack Operations
const types = @import("../types/types.zig");
const StackEntry = types.StackEntry;
pub const LocationError = error{
NotFound,
NotAStack,
InvalidLocation,
};
/// Case-insensitive comparison for identities
pub fn identities_equal(a: []const u8, b: []const u8) bool {
if (a.len != b.len) {
return false;
}
for (a, b) |char_a, char_b| {
const upper_a = if (char_a >= 'a' and char_a <= 'z') char_a - 32 else char_a;
const upper_b = if (char_b >= 'a' and char_b <= 'z') char_b - 32 else char_b;
if (upper_a != upper_b) {
return false;
}
}
return true;
}
/// Location component iterator
pub const LocationIterator = struct {
location: []const u8,
position: usize,
pub fn init(location: []const u8) LocationIterator {
var start: usize = 0;
// Skip leading separator
if (location.len > 0 and (location[0] == '/' or location[0] == '\\')) {
start = 1;
}
return LocationIterator{
.location = location,
.position = start,
};
}
pub fn next(self: *LocationIterator) ?[]const u8 {
// Skip empty components
while (self.position < self.location.len and
(self.location[self.position] == '/' or self.location[self.position] == '\\'))
{
self.position += 1;
}
if (self.position >= self.location.len) {
return null;
}
const start = self.position;
while (self.position < self.location.len and
self.location[self.position] != '/' and
self.location[self.position] != '\\')
{
self.position += 1;
}
if (self.position == start) {
return null;
}
return self.location[start..self.position];
}
};
/// Check if entry matches an identity (case-insensitive)
pub fn entry_matches_identity(entry: *const StackEntry, identity: []const u8) bool {
var short_identity_buf: [12]u8 = undefined;
const short_identity_len = entry.get_short_identity(&short_identity_buf);
return identities_equal(short_identity_buf[0..short_identity_len], identity);
}
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