runtime: c.Argc, c.Argv, c.Getopt

c/c.go

@@ -33,14 +33,9 @@ type (
 	FilePtr = unsafe.Pointer
 )
 
-//go:linkname Stdin __stdinp
-var Stdin FilePtr
-
-//go:linkname Stdout __stdoutp
-var Stdout FilePtr
-
-//go:linkname Stderr __stderrp
-var Stderr FilePtr
+type integer interface {
+	~int | ~uint | ~uintptr | ~int32 | ~uint32 | ~int64 | ~uint64
+}
 
 //go:linkname Str llgo.cstr
 func Str(string) *Char
@@ -48,6 +43,9 @@ func Str(string) *Char
 //go:linkname Advance llgo.advance
 func Advance(ptr Pointer, offset int) Pointer
 
+// llgo:link Index llgo.index
+// func Index[T any, I integer](ptr *T, offset I) T { return *ptr }
+
 //go:linkname Alloca llgo.alloca
 func Alloca(size uintptr) Pointer
 
@@ -57,9 +55,6 @@ func AllocaCStr(s string) *Char
 //go:linkname Unreachable llgo.unreachable
 func Unreachable()
 
-//go:linkname Rand C.rand
-func Rand() Int
-
 //go:linkname Malloc C.malloc
 func Malloc(size uintptr) Pointer
 
@@ -69,14 +64,70 @@ func Memcpy(dst, src Pointer, n uintptr) Pointer
 //go:linkname Memset C.memset
 func Memset(s Pointer, c Int, n uintptr) Pointer
 
+// -----------------------------------------------------------------------------
+
+//go:linkname Rand C.rand
+func Rand() Int
+
+//go:linkname Qsort C.qsort
+func Qsort(base Pointer, count, elem uintptr, compar func(a, b Pointer) Int)
+
+// -----------------------------------------------------------------------------
+
+//go:linkname Stdin __stdinp
+var Stdin FilePtr
+
+//go:linkname Stdout __stdoutp
+var Stdout FilePtr
+
+//go:linkname Stderr __stderrp
+var Stderr FilePtr
+
 //go:linkname Printf C.printf
 func Printf(format *Char, __llgo_va_list ...any) Int
 
 //go:linkname Fprintf C.fprintf
 func Fprintf(fp FilePtr, format *Char, __llgo_va_list ...any) Int
 
-//go:linkname Qsort C.qsort
-func Qsort(base Pointer, count, elem uintptr, compar func(a, b Pointer) Int)
+// -----------------------------------------------------------------------------
 
 //go:linkname Time C.time
 func Time(*int32) int32
+
+// -----------------------------------------------------------------------------
+
+type Option struct {
+	Name   *Char
+	HasArg Int
+	Flag   *Int
+	Val    Int
+}
+
+//go:linkname Argc __llgo_argc
+var Argc Int
+
+//go:linkname Argv __llgo_argv
+var Argv **Char
+
+//go:linkname Optarg optarg
+var Optarg *Char
+
+//go:linkname Optind optind
+var Optind Int
+
+//go:linkname Opterr opterr
+var Opterr Int
+
+//go:linkname Optopt optopt
+var Optopt Int
+
+//go:linkname Getopt C.getopt
+func Getopt(argc Int, argv **Char, optstring *Char) Int
+
+//go:linkname GetoptLong C.getopt_long
+func GetoptLong(argc Int, argv **Char, optstring *Char, longopts *Option, longindex *Int) Int
+
+//go:linkname GetoptLongOnly C.getopt_long_only
+func GetoptLongOnly(argc Int, argv **Char, optstring *Char, longopts *Option, longindex *Int) Int
+
+// -----------------------------------------------------------------------------