mlx-c/python/c.py at main · Open-Less/mlx-c · GitHub

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import re

import sys

import mlxtypes as mt

import mlxhooks as hooks

import mlxvariants as variants

def to_snake_letters(name):

name = re.sub(r"([A-Z]+)([A-Z][a-z])", r"\1_\2", name)

name = re.sub(r"([a-z\d])([A-Z])", r"\1_\2", name)

name = name.lower()

return name

def c_namespace(namespace):

c_prefix = namespace.split("::")

if c_prefix[0] == "mlx" and c_prefix[1] == "core":

c_prefix.pop(1) # we pop core

if len(c_prefix) == 2 and c_prefix[1] == "cu":

c_prefix[1] = "cuda"

return "_".join(c_prefix)

def uniq_defs(defs):

uniq_defs = []

variants = {}

for d in defs:

variant = d["variant"] if "variant" in d else ""

if variant in variants:

continue

else:

variants[variant] = True

uniq_defs.append(d)

return uniq_defs

def generate(funcs, enums, header, headername, implementation, docstring):

sorted_funcs = []

for name, defs in funcs.items():

name_split = name.split("::")

namespace = "_".join(name_split[:-1])

name = name_split[-1]

defs.sort(key=lambda x: len(x["params_name"]), reverse=True)

# handle duplicates and other exceptions

if hasattr(variants, namespace):

defs = getattr(variants, namespace)(name, defs)

sorted_funcs += uniq_defs(defs)

sorted_funcs.sort(key=lambda x: x["name"])

print(

/* */

/* This file is auto-generated. Do not edit manually. */

/* */

"""

)

if implementation:

print('#include "mlx/c/' + headername + '.h"')

for include in header.split(";"):

# Extract path from the last mlx/ onwards

# This handles paths like ../mlx/mlx/backend/... -> mlx/backend/...

parts = include.split("/")

mlx_idx = None

for i, part in enumerate(parts):

if part == "mlx":

mlx_idx = i

if mlx_idx is not None:

print('#include "' + "/".join(parts[mlx_idx:]) + '"')

print('#include "mlx/c/error.h"')

print('#include "mlx/c/private/mlx.h"')

print()

else:

print("#ifndef MLX_" + headername.upper() + "_H")

print("#define MLX_" + headername.upper() + "_H")

print(

"""

#include <stdbool.h>

#include <stdint.h>

#include <stdio.h>

#include "mlx/c/array.h"

#include "mlx/c/closure.h"

#include "mlx/c/distributed_group.h"

#include "mlx/c/io_types.h"

#include "mlx/c/map.h"

#include "mlx/c/stream.h"

#include "mlx/c/string.h"

#include "mlx/c/vector.h"

#ifdef __cplusplus

extern "C" {

#endif

"""

)

if docstring:

docstring = docstring.replace("\n", "\n * ")

print("/**")

print(r" * \defgroup " + headername + " " + docstring)

print(" */")

print("/**@{*/")

print() # blank line after /**@{*/

for _, enum in enums.items():

c_typename = "mlx_" + to_snake_letters(enum["name"])

c_vals = []

for value in enum["values"]:

c_vals.append(

"MLX_" + to_snake_letters(enum["name"]).upper() + "_" + value.upper()

)

if implementation:

pass

else:

decl = ["typedef enum "]

decl.append(c_typename + "_")

decl.append("{")

decl.append(", ".join(c_vals))

decl.append("}")

decl.append(c_typename)

decl.append(";")

print(" ".join(decl))

print()

for f in sorted_funcs:

if "variant" in f:

func_name = (

c_namespace(f["namespace"]) + "_" + f["name"] + "_" + f["variant"]

)

else:

func_name = c_namespace(f["namespace"]) + "_" + f["name"]

if hasattr(hooks, func_name):

hook_result = getattr(hooks, func_name)(f, implementation)

if not hook_result:

print() # blank line after hook output

continue

signature = []

return_t = f["return_t"]

if return_t in mt.cpptypes:

return_t = mt.cpptypes[return_t]

elif return_t in mt.alttypes:

return_t = mt.alttypes[return_t]

else:

print("unsupported return type: " + return_t, file=sys.stderr)

print("skipping", f, file=sys.stderr)

continue

signature.append("int")

signature.append(func_name + "(")

c_call = []

cpp_call = []

# return values as first arguments

res_arg = return_t["c_return_arg"]("res")

if res_arg:

c_call.append(res_arg)

pt = f["params_t"]

pn = f["params_name"]

pd = f["params_default"]

use_defaults = "use_defaults" in f and f["use_defaults"]

encountered_unsupported_type = False

for i in range(len(pt)):

if use_defaults and pd[i]:

continue

pti = pt[i]

pni = pn[i]

if pni is None:

pni = "param" # good luck

if pti in mt.cpptypes:

pti = mt.cpptypes[pti]

elif pti in mt.alttypes:

pti = mt.alttypes[pti]

else:

print("unsupported argument type: " + pti, file=sys.stderr)

encountered_unsupported_type = True

print("skipping", f, file=sys.stderr)

break

c_call.append(pti["c_arg"](pni))

cpp_call.append(pti["c_to_cpp"](pni))

if encountered_unsupported_type:

print("skipping", f, file=sys.stderr)

continue

# print(f)

c_call = ", ".join(c_call) if len(c_call) > 0 else "void"

cpp_call = ", ".join(cpp_call)

signature.append(c_call)

signature.append(")")

# Join signature parts, then clean up spaces around parens

signature = " ".join(signature)

signature = signature.replace("( ", "(").replace(" )", ")")

c_code = signature + ";"

if implementation:

cpp_call = f["namespace"] + "::" + f["name"] + "(" + cpp_call + ")"

cpp_code = [

'extern "C" ' + signature + " {",

" try {",

" " + return_t["c_assign_from_cpp"]("res", cpp_call) + ";",

" } catch (std::exception& e) {",

" mlx_error(e.what());",

" return 1;",

" }",

" return 0;",

"}",

]

print("\n".join(cpp_code))

else:

print(c_code)

if implementation:

pass

else:

if docstring:

print() # blank line before /**@}*/

print("/**@}*/")

print(

"""\

#ifdef __cplusplus

}

#endif

#endif"""

) # no trailing newline

mlx-c/python/c.py at main · Open-Less/mlx-c · GitHub

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