simonkellet/odin-flags
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added custom flag formats

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This commit is contained in:
Simon Kellet 2026-07-09 16:15:12 +01:00
parent d95eff2944
commit ce9cd30cae
2 changed files with 29 additions and 12 deletions
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37
fleg/flag.odin
View File

@ -8,6 +8,8 @@ import "core:strconv"
import "core:strings"
FORCE_HELP_ON_EMPTY_ARGS := false
FLAG_START_CHAR := "-"
FLAG_SEP_CHAR := "="
Flag_Value_Ptr :: union {
^bool,
@ -48,18 +50,20 @@ print_flags :: proc() {
print_usage :: proc() {
fmt.println("\tUsage: ")
fmt.println("\n\tFlag format for this program:")
fmt.printfln("\t%s<flag>%s<value>\n", FLAG_START_CHAR, FLAG_SEP_CHAR)
for f in all_flags {
switch v in f.value {
case ^bool:
fmt.printfln("\t-%s:\n\t\t%s (default: %v)\n", f.name, f.usage, v^)
fmt.printfln("\t%s%s:\n\t\t%s (default: %v)\n", FLAG_START_CHAR, f.name, f.usage, v^)
case ^int:
fmt.printfln("\t-%s:\n\t\t%s (default: %d)\n", f.name, f.usage, v^)
fmt.printfln("\t%s%s:\n\t\t%s (default: %d)\n", FLAG_START_CHAR, f.name, f.usage, v^)
case ^string:
fmt.printfln("\t-%s:\n\t\t%s (default: %s)\n", f.name, f.usage, v^)
fmt.printfln("\t%s%s:\n\t\t%s (default: %s)\n", FLAG_START_CHAR, f.name, f.usage, v^)
case ^f32:
fmt.printfln("\t-%s:\n\t\t%s (default: %f)\n", f.name, f.usage, v^)
fmt.printfln("\t%s%s:\n\t\t%s (default: %f)\n", FLAG_START_CHAR, f.name, f.usage, v^)
case ^f64:
fmt.printfln("\t-%s:\n\t\t%s (default: %f)\n", f.name, f.usage, v^)
fmt.printfln("\t%s%s:\n\t\t%s (default: %f)\n", FLAG_START_CHAR, f.name, f.usage, v^)
}
}
os.exit(0)
@ -94,22 +98,27 @@ parse_flags :: proc() {
if len(os.args) < 2 && FORCE_HELP_ON_EMPTY_ARGS {print_usage()}
for &a in os.args {
if a == "-help" || a == "--help" {print_usage()}
if a == "-h" || a == "-help" || a == "--help" {print_usage()}
if a == os.args[0] {continue}
for &f in all_flags {
if f.parsed {continue}
a = strings.trim_prefix(a, "-")
//a = strings.trim_prefix(a, "-")
a = strings.trim_prefix(a, FLAG_START_CHAR)
name := a
value: string
split := strings.index_any(a, "=")
//split := strings.index_any(a, "=")
split := strings.index_any(a, FLAG_SEP_CHAR)
if split >= 0 {
name = a[:split]
value = a[split + 1:]
} else {
name = a
fmt.printf("[INFO]: Could not read flag: %s. ", name)
fmt.printfln("Want %s<flag>%s<value>\n", FLAG_START_CHAR, FLAG_SEP_CHAR)
break
}
if name == f.name && !f.parsed {
@ -119,7 +128,8 @@ parse_flags :: proc() {
if value == "" {break}
parsed, ok := strconv.parse_bool(value)
if !ok {
fmt.fprintfln(os.stderr, "[ERROR] Failed to parse flag %s: got %T, wanted bool", f.name, value)
fmt.fprintfln(os.stderr, "[ERROR] Failed to parse flag %s: got %T, wanted bool",
f.name, value)
os.exit(1)
}
v^ = parsed
@ -128,7 +138,8 @@ parse_flags :: proc() {
if value == "" {break}
parsed, ok := strconv.parse_int(value)
if !ok {
fmt.fprintfln(os.stderr, "[ERROR] Failed to parse flag %s: got %T, wanted int", f.name, value)
fmt.fprintfln(os.stderr, "[ERROR] Failed to parse flag %s: got %T, wanted int",
f.name, value)
os.exit(1)
}
v^ = parsed
@ -142,7 +153,8 @@ parse_flags :: proc() {
if value == "" {break}
parsed, ok := strconv.parse_f32(value)
if !ok {
fmt.fprintfln(os.stderr, "[ERROR] Failed to parse flag %s: got %T, wanted f32", f.name, value)
fmt.fprintfln(os.stderr, "[ERROR] Failed to parse flag %s: got %T, wanted f32",
f.name, value)
os.exit(1)
}
v^ = parsed
@ -151,7 +163,8 @@ parse_flags :: proc() {
if value == "" {break}
parsed, ok := strconv.parse_f64(value)
if !ok {
fmt.fprintfln(os.stderr, "[ERROR] Failed to parse flag %s: got %T, wanted f64", f.name, value)
fmt.fprintfln(os.stderr, "[ERROR] Failed to parse flag %s: got %T, wanted f64",
f.name, value)
os.exit(1)
}
v^ = parsed

4
main.odin
View File

@ -14,6 +14,10 @@ main :: proc(){
fleg.init_custom_allocator(arena_alloc)
*/
fleg.FLAG_START_CHAR = "--"
fleg.FLAG_SEP_CHAR = ":"
fleg.FORCE_HELP_ON_EMPTY_ARGS = true
defer fleg.destroy()
isRunning: bool
isNumber: int