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133 lines
3.2 KiB
Odin
133 lines
3.2 KiB
Odin
package core_flags_example
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import "base:runtime"
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import "core:flags"
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import "core:fmt"
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import "core:net"
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import "core:os"
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import "core:time/datetime"
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Fixed_Point1_1 :: struct {
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integer: u8,
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fractional: u8,
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}
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Optimization_Level :: enum {
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Slow,
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Fast,
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Warp_Speed,
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Ludicrous_Speed,
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}
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// It's simple but powerful.
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my_custom_type_setter :: proc(
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data: rawptr,
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data_type: typeid,
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unparsed_value: string,
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args_tag: string,
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) -> (
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error: string,
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handled: bool,
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alloc_error: runtime.Allocator_Error,
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) {
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if data_type == Fixed_Point1_1 {
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handled = true
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ptr := cast(^Fixed_Point1_1)data
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// precision := flags.get_subtag(args_tag, "precision")
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if len(unparsed_value) == 3 {
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ptr.integer = unparsed_value[0] - '0'
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ptr.fractional = unparsed_value[2] - '0'
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} else {
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error = "Incorrect format. Must be in the form of `i.f`."
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}
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// Perform sanity checking here in the type parsing phase.
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//
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// The validation phase is flag-specific.
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if !(0 <= ptr.integer && ptr.integer < 10) || !(0 <= ptr.fractional && ptr.fractional < 10) {
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error = "Incorrect format. Must be between `0.0` and `9.9`."
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}
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}
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return
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}
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my_custom_flag_checker :: proc(
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model: rawptr,
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name: string,
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value: any,
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args_tag: string,
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) -> (error: string) {
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if name == "iterations" {
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v := value.(int)
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if !(1 <= v && v < 5) {
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error = "Iterations only supports 1 ..< 5."
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}
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}
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return
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}
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Distinct_Int :: distinct int
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main :: proc() {
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Options :: struct {
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file: os.Handle `args:"pos=0,required,file=r" usage:"Input file."`,
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output: os.Handle `args:"pos=1,file=cw" usage:"Output file."`,
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hub: net.Host_Or_Endpoint `usage:"Internet address to contact for updates."`,
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schedule: datetime.DateTime `usage:"Launch tasks at this time."`,
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opt: Optimization_Level `usage:"Optimization level."`,
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todo: [dynamic]string `usage:"Todo items."`,
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accuracy: Fixed_Point1_1 `args:"required" usage:"Lenience in FLOP calculations."`,
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iterations: int `usage:"Run this many times."`,
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// Note how the parser will transform this flag's name into `special-int`.
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special_int: Distinct_Int `args:"indistinct" usage:"Able to set distinct types."`,
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quat: quaternion256,
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bits: bit_set[0..<8],
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// Many different requirement styles:
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// gadgets: [dynamic]string `args:"required=1" usage:"gadgets"`,
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// widgets: [dynamic]string `args:"required=<3" usage:"widgets"`,
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// foos: [dynamic]string `args:"required=2<4"`,
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// bars: [dynamic]string `args:"required=3<4"`,
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// bots: [dynamic]string `args:"required"`,
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// (Maps) Only available in Odin style:
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// assignments: map[string]u8 `args:"name=assign" usage:"Number of jobs per worker."`,
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// (Manifold) Only available in UNIX style:
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// bots: [dynamic]string `args:"manifold=2,required"`,
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verbose: bool `usage:"Show verbose output."`,
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debug: bool `args:"hidden" usage:"print debug info"`,
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overflow: [dynamic]string `usage:"Any extra arguments go here."`,
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}
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opt: Options
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style : flags.Parsing_Style = .Odin
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flags.register_type_setter(my_custom_type_setter)
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flags.register_flag_checker(my_custom_flag_checker)
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flags.parse_or_exit(&opt, os.args, style)
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fmt.printfln("%#v", opt)
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if opt.output != 0 {
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os.write_string(opt.output, "Hellope!\n")
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}
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}
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