mirror of
https://github.com/Not-Nik/raylib-zig.git
synced 2025-09-09 12:07:27 +00:00
149 lines
4.6 KiB
Python
149 lines
4.6 KiB
Python
import re
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"""
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Automatic utility for generating raylib function headers. Simply put
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raylib.h in the working directory of this script and execute.
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Tested with raylib version 3.7.0
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"""
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C_TO_ZIG = {
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"bool": "bool",
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"char": "u8",
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"double": "f64",
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"float": "f32",
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"int": "c_int",
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"long": "c_long",
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"unsigned char": "u8",
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"unsigned int": "c_uint",
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}
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# Some c types have a different sizes on different systems
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# and zig knows that so we tell it to get the system specific size for us
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def c_to_zig_type(c: str) -> str:
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const = "const " if "const " in c else ""
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c = c.replace("const ", "")
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z = C_TO_ZIG.get(c)
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if z is not None:
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return const + z
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return const + c
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def fix_pointer(name: str, t: str):
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pre = ""
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while name.startswith("*"):
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name = name[1:]
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pre += "[*c]"
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t = pre + t
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if t == "[*c]const void":
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t = "*const anyopaque"
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elif t == "[*c]void":
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t = "*anyopaque"
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elif len(pre) == 0:
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t = t.replace("const ", "")
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return name, t
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def fix_enums(arg_name, arg_type, func_name):
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# Hacking specifc enums in here
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# Raylib doesn't use the enums but rather the resulting ints
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if arg_type == "int" or arg_type == "unsigned int":
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if arg_name == "key":
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arg_type = "KeyboardKey"
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elif arg_name == "button":
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if "Gamepad" in func_name:
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arg_type = "GamepadButton"
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else:
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arg_type = "MouseButton"
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elif arg_name == "mode" and func_name == "SetCameraMode":
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arg_type = "CameraMode"
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elif arg_name == "gesture":
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arg_type = "Gestures"
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elif arg_name == "flags" and func_name in ["SetWindowState", "ClearWindowState", "SetConfigFlags"]:
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arg_type = "ConfigFlags"
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return arg_type
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def parse_header(header_name: str, output_file: str, prefix: str):
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header = open(header_name, mode="r")
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zig_functions = []
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zig_heads = []
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zig_types = set()
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leftover = ""
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for line in header.readlines():
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if line.startswith("typedef struct"):
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zig_types.add(line.split(' ')[2])
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elif line.startswith("typedef enum"):
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# don't trip the general typedef case
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pass
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elif line.startswith("typedef "):
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zig_types.add(line.split(' ')[2].replace(';', '').strip())
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if not line.startswith(prefix):
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continue
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line = line.split(";", 1)[0]
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if leftover:
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line = leftover + line
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leftover = ""
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line = line.replace("* ", " *")
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line = line.replace(",", ", ")
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line = line.replace(" ", " ")
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# each (.*) is some variable value
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result = re.search(prefix + "(.*) (.*)start_arg(.*)end_arg(.*)", line.replace("(", "start_arg").replace(")", "end_arg"))
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if result is None:
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leftover += line
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continue
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# get whats in the (.*)'s
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return_type = result.group(1)
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func_name = result.group(2)
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arguments = result.group(3)
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return_type = c_to_zig_type(return_type)
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func_name, return_type = fix_pointer(func_name, return_type)
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zig_arguments = []
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for arg in arguments.split(", "):
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if arg == "void":
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break
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if arg == "...":
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zig_arguments.append("...")
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continue
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arg_type = " ".join(arg.split(" ")[0:-1]) # everything but the last element (for stuff like "const Vector3")
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arg_name = arg.split(" ")[-1] # last element should be the name
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arg_type = fix_enums(arg_name, arg_type, func_name)
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arg_type = c_to_zig_type(arg_type)
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arg_name, arg_type = fix_pointer(arg_name, arg_type)
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zig_types.add(arg_type.replace("const ", ""))
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zig_arguments.append(arg_name + ": " + arg_type) # put everything together
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zig_arguments = ", ".join(zig_arguments)
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zig_heads.append("pub extern fn " + func_name + "(" + zig_arguments + ") " + return_type + ";")
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zigheader = open(output_file, mode="w")
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print("""const rl = @import("raylib-zig.zig");\n""", file=zigheader)
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print("\n".join(sorted(f"const {t} = rl.{t};" for t in zig_types if ('*' not in t) and (t not in C_TO_ZIG.values()))), file=zigheader)
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print("", file=zigheader)
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print("\n".join(zig_heads), file=zigheader)
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print("", file=zigheader)
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print("\n".join(zig_functions), file=zigheader)
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if __name__ == "__main__":
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parse_header("raylib.h", "raylib-wa.zig", "RLAPI ")
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parse_header("raymath.h", "raylib-zig-math.zig", "RMAPI ")
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