1 files changed, 104 insertions, 0 deletions
diff --git a/vendor/libc-shim/stdio_os.odin b/vendor/libc-shim/stdio_os.odin
new file mode 100644
index 000000000..f6d30a227
--- /dev/null
+++ b/vendor/libc-shim/stdio_os.odin
@@ -0,0 +1,104 @@
+#+build !freestanding
+#+build !js
+package odin_libc
+
+import "core:io"
+import "core:c"
+import "core:os"
+
+_fopen :: proc(path, _mode: cstring) -> FILE {
+	flags: os.File_Flags
+
+	mode := string(_mode)
+	if len(mode) > 1 {
+		switch mode[0] {
+		case 'r':
+			flags += {.Read}
+		case 'w':
+			flags += {.Write, .Create, .Trunc}
+		case 'a':
+			flags += {.Write, .Create, .Append}
+		case:
+			return nil
+		}
+
+		if len(mode) > 1 && mode[1] == '+' {
+			flags += {.Write, .Read}
+		} else if len(mode) > 2 && mode[1] == 'b' && mode[2] == '+' {
+			flags += {.Write, .Read}
+		}
+	}
+
+	file, err := os.open(string(path), flags, os.Permissions_Read_Write_All)
+	if err != nil {
+		return nil
+	}
+
+	return FILE(file)
+}
+
+_fseek :: proc(_file: FILE, offset: c.long, whence: i32) -> i32 {
+	file := __file(_file) 
+	if _, err := os.seek(file, i64(offset), io.Seek_From(whence)); err != nil {
+		return -1
+	}
+
+	return 0
+}
+
+_ftell :: proc(_file: FILE) -> c.long {
+	file := __file(_file) 
+	pos, err := os.seek(file, 0, .Current)
+	if err != nil {
+		return -1
+	}
+
+	return c.long(pos)
+}
+
+_fclose :: proc(_file: FILE) -> i32 {
+	file := __file(_file) 
+	if err := os.close(file); err != nil {
+		return EOF
+	}
+
+	return 0
+}
+
+_fread :: proc(buffer: [^]byte, size: uint, count: uint, _file: FILE) -> uint {
+	file := __file(_file) 
+	n, _ := os.read(file, buffer[:size*count])
+	return uint(max(0, n)) / size
+}
+
+_fwrite :: proc(buffer: [^]byte, size: uint, count: uint, _file: FILE) -> uint {
+	file := __file(_file) 
+	n, _ := os.write(file, buffer[:size*count])
+	return uint(max(0, n)) / size
+}
+
+_putchar :: proc(char: c.int) -> c.int {
+	n, err := os.write_byte(os.stdout, byte(char))	
+	if n == 0 || err != nil {
+		return EOF
+	}
+	return char
+}
+
+_getchar :: proc() -> c.int {
+	ret: [1]byte
+	n, err := os.read(os.stdin, ret[:])
+	if n == 0 || err != nil {
+		return EOF
+	}
+	return c.int(ret[0])
+}
+
+@(private="file")
+__file :: proc(file: FILE) -> ^os.File {
+	switch (uint(uintptr(file))) {
+	case 2: return os.stdout
+	case 3: return os.stderr
+	case:   return (^os.File)(file)
+	}
+}