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update to zig 0.15.1 and fatfs R0.16 #9

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d8d54d7
update to zig 0.15.1
leecannon Sep 29, 2025
6b315c7
update fatfs to R0.16
leecannon Sep 29, 2025
e7b8199
use `std.Io.Writer.Allocating` instead of `std.ArrayList(u8)`
leecannon Oct 16, 2025
2806bfd
`std.io` is deprecated
leecannon Oct 16, 2025
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4 changes: 1 addition & 3 deletions .github/workflows/validate.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -14,9 +14,7 @@ jobs:
uses: actions/checkout@v2

- name: Setup Zig
uses: mlugg/setup-zig@v1
with:
version: 0.14.0
uses: mlugg/setup-zig@v2

- name: Build Demo
run: |
Expand Down
114 changes: 59 additions & 55 deletions build.zig
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Expand Up @@ -20,37 +20,38 @@ pub fn build(b: *std.Build) void {
const config = blk: {
var config = Config{};

add_config_option(b, &config, .read_only, "If set, the library will only be able to read filesystems.");
add_config_option(b, &config, .minimize, "Set this to different values to reduce API surface");
add_config_option(b, &config, .find, "Enable find support");
add_config_option(b, &config, .mkfs, "Enable mkfs support");
add_config_option(b, &config, .fastseek, "Use fast seek option");
add_config_option(b, &config, .expand, "Enables expandfs support");
add_config_option(b, &config, .chmod, "Enables chmod support");
add_config_option(b, &config, .label, "Enables support for handling of filesystem labels");
add_config_option(b, &config, .forward, "Enables forward support");
add_config_option(b, &config, .strfuncs, "Enables file string functions");
add_config_option(b, &config, .printf_lli, "Enables printf_lli support");
add_config_option(b, &config, .printf_float, "Enables printf_float support");
add_config_option(b, &config, .strf_encoding, "Sets the format string encoding");
add_config_option(b, &config, .max_long_name_len, "Sets the maximum name for long file names");
add_config_option(b, &config, .code_page, "Defines the OEM code page");
add_config_option(b, &config, .long_file_name, "Enables long file name support");
add_config_option(b, &config, .long_file_name_encoding, "Sets the encoding for long file names");
add_config_option(b, &config, .long_file_name_buffer_size, "Sets the buffer size for long file names");
add_config_option(b, &config, .short_file_name_buffer_size, "Sets the buffer size for short file names");
add_config_option(b, &config, .relative_path_api, "Enables the relative path API");
add_config_option(b, &config, .multi_partition, "Enables support for several partitions on the same drive");
add_config_option(b, &config, .lba64, "Enables support for 64 bit linear block addresses.");
add_config_option(b, &config, .min_gpt_sectors, "Sector count threshold for switching to GPT partition tables");
add_config_option(b, &config, .use_trim, "Enables support for ATA TRIM command");
add_config_option(b, &config, .tiny, "Enable tiny buffer configuration");
add_config_option(b, &config, .exfat, "Enables support for ExFAT");
add_config_option(b, &config, .filesystem_trust, "Sets which values in the FSINFO structure you trust.");
add_config_option(b, &config, .lock, "Enables file system locking");
add_config_option(b, &config, .reentrant, "Makes the library reentrant");
add_config_option(b, &config, .sync_type, "Defines the name of the C type which is used for sync operations");
add_config_option(b, &config, .timeout, "Defines the timeout period in OS ticks");
add_config_option(b, &config, "read_only", "If set, the library will only be able to read filesystems.");
add_config_option(b, &config, "minimize", "Set this to different values to reduce API surface");
add_config_option(b, &config, "find", "Enable find support");
add_config_option(b, &config, "mkfs", "Enable mkfs support");
add_config_option(b, &config, "fastseek", "Use fast seek option");
add_config_option(b, &config, "expand", "Enables expandfs support");
add_config_option(b, &config, "chmod", "Enables chmod support");
add_config_option(b, &config, "label", "Enables support for handling of filesystem labels");
add_config_option(b, &config, "forward", "Enables forward support");
add_config_option(b, &config, "strfuncs", "Enables file string functions");
add_config_option(b, &config, "printf_lli", "Enables printf_lli support");
add_config_option(b, &config, "printf_float", "Enables printf_float support");
add_config_option(b, &config, "strf_encoding", "Sets the format string encoding");
add_config_option(b, &config, "max_long_name_len", "Sets the maximum name for long file names");
add_config_option(b, &config, "code_page", "Defines the OEM code page");
add_config_option(b, &config, "long_file_name", "Enables long file name support");
add_config_option(b, &config, "long_file_name_encoding", "Sets the encoding for long file names");
add_config_option(b, &config, "long_file_name_buffer_size", "Sets the buffer size for long file names");
add_config_option(b, &config, "short_file_name_buffer_size", "Sets the buffer size for short file names");
add_config_option(b, &config, "relative_path_api", "Enables the relative path API");
add_config_option(b, &config, "maximum_path_depth", "Sets the maximum path depth");
add_config_option(b, &config, "multi_partition", "Enables support for several partitions on the same drive");
add_config_option(b, &config, "lba64", "Enables support for 64 bit linear block addresses.");
add_config_option(b, &config, "min_gpt_sectors", "Sector count threshold for switching to GPT partition tables");
add_config_option(b, &config, "use_trim", "Enables support for ATA TRIM command");
add_config_option(b, &config, "tiny", "Enable tiny buffer configuration");
add_config_option(b, &config, "exfat", "Enables support for ExFAT");
add_config_option(b, &config, "filesystem_trust", "Sets which values in the FSINFO structure you trust.");
add_config_option(b, &config, "lock", "Enables file system locking");
add_config_option(b, &config, "reentrant", "Makes the library reentrant");
add_config_option(b, &config, "sync_type", "Defines the name of the C type which is used for sync operations");
add_config_option(b, &config, "timeout", "Defines the timeout period in OS ticks");

const maybe_rtc_time = b.option([]const u8, "static-rtc", "Disables runtime time API by setting the clock to a fixed value. Provide a string in the format YYYY-MM-DD");
if (maybe_rtc_time) |rtc_time| {
Expand Down Expand Up @@ -91,13 +92,13 @@ pub fn build(b: *std.Build) void {
}

if (maybe_volume_names) |volume_names| {
var volumes = std.ArrayList([]const u8).init(b.allocator);
var volumes: std.ArrayList([]const u8) = .empty;

var iter = std.mem.splitScalar(u8, volume_names, ',');
while (iter.next()) |name| {
volumes.append(name) catch @panic("out of memory");
volumes.append(b.allocator, name) catch @panic("out of memory");
}
config.volumes = .{ .named = volumes.items };
config.volumes = .{ .named = volumes.toOwnedSlice(b.allocator) catch @panic("out of memory") };
}

const maybe_sector_config = b.option([]const u8, "sector-size", "Defines the sector size range. Use `<min>:<max>` or `<fixed>`. Valid items for the range are 512, 1024, 2048 or 4096. No other values allowed.");
Expand All @@ -109,20 +110,20 @@ pub fn build(b: *std.Build) void {
config.sector_size = .{
.dynamic = .{
.minimum = std.meta.stringToEnum(SectorOption, min) orelse bad_config(
"Invalid value for -Dsector-size: '{}'",
.{std.zig.fmtEscapes(sector_config)},
"Invalid value for -Dsector-size: '{f}'",
.{std.zig.fmtString(sector_config)},
),
.maximum = std.meta.stringToEnum(SectorOption, max) orelse bad_config(
"Invalid value for -Dsector-size: '{}'",
.{std.zig.fmtEscapes(sector_config)},
"Invalid value for -Dsector-size: '{f}'",
.{std.zig.fmtString(sector_config)},
),
},
};
} else {
config.sector_size = .{
.static = std.meta.stringToEnum(SectorOption, sector_config) orelse bad_config(
"Invalid value for -Dsector-size: '{}'",
.{std.zig.fmtEscapes(sector_config)},
"Invalid value for -Dsector-size: '{f}'",
.{std.zig.fmtString(sector_config)},
),
};
}
Expand All @@ -136,7 +137,7 @@ pub fn build(b: *std.Build) void {
.style = .blank,
.include_path = "ffconf.h",
}, .{
.FFCONF_DEF = 5380,
.FFCONF_DEF = 80386,
});

switch (config.volumes) {
Expand All @@ -147,19 +148,18 @@ pub fn build(b: *std.Build) void {
});
},
.named => |strings| {
var list = std.ArrayList(u8).init(b.allocator);
var list: std.Io.Writer.Allocating = .init(b.allocator);
for (strings) |name| {
if (list.items.len > 0) {
list.appendSlice(", ") catch @panic("out of memory");
if (list.written().len > 0) {
list.writer.writeAll(", ") catch @panic("out of memory");
}
list.writer().print("\"{}\"", .{
std.fmt.fmtSliceHexUpper(name),
}) catch @panic("out of memory");
list.writer.print("\"{X}\"", .{name}) catch @panic("out of memory");
}

config_header.addValues(.{
.FF_VOLUMES = @as(i64, @intCast(strings.len)),
.FF_STR_VOLUME_ID = 1,
.FF_VOLUME_STRS = list.items,
.FF_VOLUME_STRS = list.written(),
});
},
}
Expand Down Expand Up @@ -249,9 +249,11 @@ pub fn build(b: *std.Build) void {
// usage demo:
const exe = b.addExecutable(.{
.name = "zfat-demo",
.root_source_file = b.path("demo/main.zig"),
.target = target,
.optimize = optimize,
.root_module = b.createModule(.{
.root_source_file = b.path("demo/main.zig"),
.target = target,
.optimize = optimize,
}),
});
exe.root_module.addImport("zfat", zfat_mod);

Expand Down Expand Up @@ -284,10 +286,10 @@ fn add_config_field(config_header: *std.Build.Step.ConfigHeader, config: Config,
}
}

fn add_config_option(b: *std.Build, config: *Config, comptime field: @TypeOf(.tag), desc: []const u8) void {
const T = std.meta.FieldType(Config, field);
if (b.option(T, @tagName(field), desc)) |value|
@field(config, @tagName(field)) = value;
fn add_config_option(b: *std.Build, config: *Config, comptime field: []const u8, desc: []const u8) void {
const T = @FieldType(Config, field);
if (b.option(T, field, desc)) |value|
@field(config, field) = value;
}

pub const Config = struct {
Expand All @@ -311,6 +313,7 @@ pub const Config = struct {
long_file_name_buffer_size: u32 = 255,
short_file_name_buffer_size: u32 = 12,
relative_path_api: RelativePathApi = .disabled,
maximum_path_depth: u8 = 10,
volumes: VolumeKind = .{ .count = 1 },
sector_size: SectorSize = .{ .static = .@"512" },
multi_partition: bool = false,
Expand Down Expand Up @@ -449,6 +452,7 @@ const macro_names = struct {
pub const long_file_name_buffer_size = "FF_LFN_BUF";
pub const short_file_name_buffer_size = "FF_SFN_BUF";
pub const relative_path_api = "FF_FS_RPATH";
pub const maximum_path_depth = "FF_PATH_DEPTH";
pub const multi_partition = "FF_MULTI_PARTITION";
pub const lba64 = "FF_LBA64";
pub const min_gpt_sectors = "FF_MIN_GPT";
Expand Down
7 changes: 4 additions & 3 deletions build.zig.zon
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Original file line number Diff line number Diff line change
@@ -1,11 +1,12 @@
.{
.name = .zfat,
.fingerprint = 0x4212c7b5f54ad348,
.version = "0.15.0",
.version = "0.16.0",
.minimum_zig_version = "0.15.1",
.dependencies = .{
.fatfs = .{
.url = "http://elm-chan.org/fsw/ff/arc/ff15a.zip",
.hash = "N-V-__8AAFQITQCnpmdR7PARImvk-cgb-9lZmjKolexSWkUL",
.url = "https://www.elm-chan.org/fsw/ff/arc/ff16.zip",
.hash = "N-V-__8AABFXTQB0pMbXIuSQik3qRrx7zxcVxvyIaM7n2nEd",
},
},
.paths = .{
Expand Down
5 changes: 4 additions & 1 deletion demo/main.zig
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Expand Up @@ -30,7 +30,10 @@ pub fn main() !u8 {
var file = try fatfs.File.create("0:/firmware.uf2");
defer file.close();

try file.writer().writeAll("Hello, World!\r\n");
var buffer: [4096]u8 = undefined;
var writer = file.writer(&buffer);

try writer.interface.writeAll("Hello, World!\r\n");
}

return 0;
Expand Down
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