612 lines
20 KiB
Python
612 lines
20 KiB
Python
#-------------------------------------------------------------------------------
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# Generate Nim bindings
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#
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# Nim coding style:
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# - type identifiers are PascalCase, everything else is camelCase
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# - reference: https://nim-lang.org/docs/nep1.html
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#-------------------------------------------------------------------------------
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import gen_ir
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import gen_util as util
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import os, shutil, sys
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module_names = {
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'slog_': 'log',
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'sg_': 'gfx',
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'sapp_': 'app',
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'sapp_sg': 'glue',
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'stm_': 'time',
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'saudio_': 'audio',
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'sgl_': 'gl',
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'sdtx_': 'debugtext',
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'sshape_': 'shape',
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}
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c_source_paths = {
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'slog_': 'sokol-nim/src/sokol/c/sokol_log.c',
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'sg_': 'sokol-nim/src/sokol/c/sokol_gfx.c',
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'sapp_': 'sokol-nim/src/sokol/c/sokol_app.c',
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'sapp_sg': 'sokol-nim/src/sokol/c/sokol_glue.c',
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'stm_': 'sokol-nim/src/sokol/c/sokol_time.c',
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'saudio_': 'sokol-nim/src/sokol/c/sokol_audio.c',
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'sgl_': 'sokol-nim/src/sokol/c/sokol_gl.c',
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'sdtx_': 'sokol-nim/src/sokol/c/sokol_debugtext.c',
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'sshape_': 'sokol-nim/src/sokol/c/sokol_shape.c',
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}
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c_callbacks = [
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'slog_func',
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]
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ignores = [
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'sdtx_printf',
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'sdtx_vprintf',
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]
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overrides = {
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'sgl_error': 'sgl_get_error',
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'sgl_deg': 'sgl_as_degrees',
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'sgl_rad': 'sgl_as_radians',
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'sg_context_desc.color_format': 'int',
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'sg_context_desc.depth_format': 'int',
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'SGL_NO_ERROR': 'SGL_ERROR_NO_ERROR',
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'SG_BUFFERTYPE_VERTEXBUFFER': 'SG_BUFFERTYPE_VERTEX_BUFFER',
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'SG_BUFFERTYPE_INDEXBUFFER': 'SG_BUFFERTYPE_INDEX_BUFFER',
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'SG_ACTION_DONTCARE': 'SG_ACTION_DONT_CARE',
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'ptr': 'addr', # range ptr
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'func': 'fn',
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'slog_func': 'fn',
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}
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enumPrefixOverrides = {
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# sokol_gfx.h
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'PIXELFORMAT': 'pixelFormat',
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'RESOURCESTATE': 'resourceState',
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'BUFFERTYPE': 'bufferType',
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'INDEXTYPE': 'indexType',
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'IMAGETYPE': 'imageType',
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'SAMPLERTYPE': 'samplerType',
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'CUBEFACE': 'cubeFace',
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'SHADERSTAGE': 'shaderStage',
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'PRIMITIVETYPE': 'primitiveType',
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'BORDERCOLOR': 'borderColor',
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'VERTEXFORMAT': 'vertexFormat',
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'VERTEXSTEP': 'vertexStep',
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'UNIFORMTYPE': 'uniformType',
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'UNIFORMLAYOUT': 'uniformLayout',
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'CULLMODE': 'cullMode',
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'FACEWINDING': 'faceWinding',
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'COMPAREFUNC': 'compareFunc',
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'STENCILOP': 'stencilOp',
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'BLENDFACTOR': 'blendFactor',
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'BLENDOP': 'blendOp',
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'COLORMASK': 'colorMask',
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# sokol_app.h
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'EVENTTYPE': 'eventType',
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'KEYCODE': 'keyCode',
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'MOUSEBUTTON': 'mouseButton',
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}
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prim_types = {
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'int': 'int32',
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'bool': 'bool',
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'char': 'char',
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'int8_t': 'int8',
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'uint8_t': 'uint8',
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'int16_t': 'int16',
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'uint16_t': 'uint16',
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'int32_t': 'int32',
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'uint32_t': 'uint32',
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'int64_t': 'int64',
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'uint64_t': 'uint64',
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'float': 'float32',
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'double': 'float64',
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'uintptr_t': 'uint',
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'intptr_t': 'int',
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'size_t': 'int', # not a bug, Nim's sizeof() returns int
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}
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prim_defaults = {
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'int': '0',
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'bool': 'false',
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'int8_t': '0',
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'uint8_t': '0',
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'int16_t': '0',
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'uint16_t': '0',
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'int32_t': '0',
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'uint32_t': '0',
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'int64_t': '0',
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'uint64_t': '0',
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'float': '0.0f',
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'double': '0.0',
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'uintptr_t': '0',
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'intptr_t': '0',
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'size_t': '0'
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}
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common_prim_types = """
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array
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untyped typed void
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bool byte char
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int int8 int16 int32 int64
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uint uint8 uint16 uint32 uint64
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float float32 float64
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string
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cchar cint csize_t
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cfloat cdouble
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cstring
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pointer
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""".split()
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keywords = """
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addr and as asm
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bind block break
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case cast concept const continue converter
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defer discard distinct div do
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elif else end enum except export
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finally for from func
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if import in include interface is isnot iterator
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let
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macro method mixin mod
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nil not notin
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object of or out
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proc ptr
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raise ref return
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shl shr static
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template try tuple type
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using
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var
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when while
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xor
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yield
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""".split() + common_prim_types
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struct_types = []
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enum_types = []
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out_lines = ''
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def reset_globals():
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global struct_types
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global enum_types
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global out_lines
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struct_types = []
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enum_types = []
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out_lines = ''
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def l(s):
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global out_lines
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out_lines += s + '\n'
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def as_nim_prim_type(s):
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return prim_types[s]
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# prefix_bla_blub(_t) => (dep.)BlaBlub
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def as_nim_type_name(s, prefix):
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parts = s.lower().split('_')
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dep = parts[0] + '_'
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outp = ''
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if not s.startswith(prefix) and dep in module_names:
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outp = module_names[dep] + '.'
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for part in parts[1:]:
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# ignore '_t' type postfix
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if (part != 't'):
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outp += part.capitalize()
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return outp
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def check_override(name, default=None):
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if name in overrides:
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return overrides[name]
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elif default is None:
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return name
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else:
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return default
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def check_ignore(name):
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return name in ignores
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def is_power_of_two(val):
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return val == 0 or val & (val - 1) == 0
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def wrap_keywords(s):
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if s in keywords:
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return f'`{s}`'
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else:
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return s
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# prefix_bla_blub => blaBlub
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def as_camel_case(s, prefix, wrap=True):
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outp = s.lower()
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if outp.startswith(prefix):
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outp = outp[len(prefix):]
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parts = outp.lstrip('_').split('_')
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outp = parts[0]
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for part in parts[1:]:
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outp += part.capitalize()
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if wrap:
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outp = wrap_keywords(outp)
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return outp
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# PREFIX_ENUM_BLA_BLO => blaBlo
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def as_enum_item_name(s, wrap=True):
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outp = s.lstrip('_')
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parts = outp.split('_')[1:]
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if parts[0] in enumPrefixOverrides:
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parts[0] = enumPrefixOverrides[parts[0]]
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else:
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parts[0] = parts[0].lower()
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outp = parts[0]
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for part in parts[1:]:
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outp += part.capitalize()
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if wrap:
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outp = wrap_keywords(outp)
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return outp
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def is_prim_type(s):
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return s in prim_types
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def is_struct_type(s):
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return s in struct_types
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def is_enum_type(s):
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return s in enum_types
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def is_const_prim_ptr(s):
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for prim_type in prim_types:
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if s == f"const {prim_type} *":
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return True
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return False
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def is_prim_ptr(s):
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for prim_type in prim_types:
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if s == f"{prim_type} *":
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return True
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return False
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def is_const_struct_ptr(s):
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for struct_type in struct_types:
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if s == f"const {struct_type} *":
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return True
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return False
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def type_default_value(s):
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return prim_defaults[s]
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def funcptr_args(field_type, prefix):
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tokens = field_type[field_type.index('(*)')+4:-1].split(',')
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s = ""
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n = 0
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for token in tokens:
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n += 1
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arg_ctype = token.strip()
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if s != "":
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s += ", "
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arg_nimtype = as_nim_type(arg_ctype, prefix)
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if arg_nimtype == "":
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return "" # fun(void)
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s += f"a{n}:{arg_nimtype}"
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if s == "a1:void":
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s = ""
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return s
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def funcptr_result(field_type, prefix):
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ctype = field_type[:field_type.index('(*)')].strip()
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return as_nim_type(ctype, prefix)
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def as_nim_type(ctype, prefix, struct_ptr_as_value=False):
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if ctype == "void":
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return ""
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elif is_prim_type(ctype):
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return as_nim_prim_type(ctype)
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elif is_struct_type(ctype):
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return as_nim_type_name(ctype, prefix)
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elif is_enum_type(ctype):
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return as_nim_type_name(ctype, prefix)
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elif util.is_string_ptr(ctype):
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return "cstring"
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elif util.is_void_ptr(ctype) or util.is_const_void_ptr(ctype):
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return "pointer"
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elif is_const_struct_ptr(ctype):
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nim_type = as_nim_type(util.extract_ptr_type(ctype), prefix)
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if struct_ptr_as_value:
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return f"{nim_type}"
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else:
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return f"ptr {nim_type}"
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elif is_prim_ptr(ctype) or is_const_prim_ptr(ctype):
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return f"ptr {as_nim_type(util.extract_ptr_type(ctype), prefix)}"
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elif util.is_func_ptr(ctype):
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args = funcptr_args(ctype, prefix)
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res = funcptr_result(ctype, prefix)
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if res != "":
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res = ":" + res
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return f"proc({args}){res} {{.cdecl.}}"
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elif util.is_1d_array_type(ctype):
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array_ctype = util.extract_array_type(ctype)
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array_sizes = util.extract_array_sizes(ctype)
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return f'array[{array_sizes[0]}, {as_nim_type(array_ctype, prefix)}]'
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elif util.is_2d_array_type(ctype):
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array_ctype = util.extract_array_type(ctype)
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array_sizes = util.extract_array_sizes(ctype)
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return f'array[{array_sizes[0]}, array[{array_sizes[1]}, {as_nim_type(array_ctype, prefix)}]]'
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else:
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sys.exit(f"ERROR as_nim_type: {ctype}")
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def as_nim_struct_name(struct_decl, prefix):
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struct_name = check_override(struct_decl['name'])
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nim_type = f'{as_nim_type_name(struct_name, prefix)}'
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return nim_type
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def as_nim_field_name(field_decl, prefix, check_private=True):
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field_name = as_camel_case(check_override(field_decl['name']), prefix)
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if check_private:
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is_private = field_decl['name'].startswith('_')
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if not is_private:
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field_name += "*"
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return field_name
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def as_nim_field_type(struct_decl, field_decl, prefix):
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return as_nim_type(check_override(f"{struct_decl['name']}.{field_decl['name']}", default=field_decl['type']), prefix)
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def gen_struct(decl, prefix):
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l(f"type {as_nim_struct_name(decl, prefix)}* = object")
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for field in decl['fields']:
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l(f" {as_nim_field_name(field, prefix)}:{as_nim_field_type(decl, field, prefix)}")
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l("")
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def gen_consts(decl, prefix):
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l("const")
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for item in decl['items']:
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item_name = check_override(item['name'])
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l(f" {as_camel_case(item_name, prefix)}* = {item['value']}")
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l("")
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def gen_enum(decl, prefix):
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item_names_by_value = {}
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value = -1
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has_explicit_values = False
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for item in decl['items']:
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item_name = check_override(item['name'])
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if item_name.endswith("_NUM") or item_name.endswith("_FORCE_U32"):
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continue
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else:
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if 'value' in item:
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has_explicit_values = True
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value = int(item['value'])
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else:
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value += 1
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item_names_by_value[value] = as_enum_item_name(item_name)
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enum_name_nim = as_nim_type_name(decl['name'], prefix)
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l('type')
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l(f" {enum_name_nim}* {{.size:sizeof(int32).}} = enum")
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if has_explicit_values:
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# Nim requires explicit enum values to be declared in ascending order
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for value in sorted(item_names_by_value):
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name = item_names_by_value[value]
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l(f" {name} = {value},")
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else:
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for name in item_names_by_value.values():
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l(f" {name},")
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l("")
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# returns C prototype compatible function args (with pointers)
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def funcdecl_args_c(decl, prefix):
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s = ""
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func_name = decl['name']
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for param_decl in decl['params']:
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if s != "":
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s += ", "
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arg_name = param_decl['name']
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arg_type = check_override(f'{func_name}.{arg_name}', default=param_decl['type'])
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s += f"{as_camel_case(arg_name, prefix)}:{as_nim_type(arg_type, prefix)}"
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return s
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# returns Nim function args (pass structs by value)
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def funcdecl_args_nim(decl, prefix):
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s = ""
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func_name = decl['name']
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for param_decl in decl['params']:
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if s != "":
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s += ", "
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arg_name = param_decl['name']
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arg_type = check_override(f'{func_name}.{arg_name}', default=param_decl['type'])
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s += f"{as_camel_case(arg_name, prefix)}:{as_nim_type(arg_type, prefix, struct_ptr_as_value=True)}"
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return s
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def funcdecl_result(decl, prefix):
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func_name = decl['name']
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decl_type = decl['type']
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result_type = check_override(f'{func_name}.RESULT', default=decl_type[:decl_type.index('(')].strip())
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nim_res_type = as_nim_type(result_type, prefix)
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if nim_res_type == "":
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nim_res_type = "void"
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return nim_res_type
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def gen_func_nim(decl, prefix):
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c_func_name = decl['name']
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nim_func_name = as_camel_case(check_override(c_func_name), prefix, wrap=False)
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nim_res_type = funcdecl_result(decl, prefix)
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if c_func_name in c_callbacks:
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l(f"proc {nim_func_name}*({funcdecl_args_c(decl, prefix)}):{nim_res_type} {{.cdecl, importc:\"{c_func_name}\".}}")
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else:
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l(f"proc c_{nim_func_name}({funcdecl_args_c(decl, prefix)}):{nim_res_type} {{.cdecl, importc:\"{c_func_name}\".}}")
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l(f"proc {wrap_keywords(nim_func_name)}*({funcdecl_args_nim(decl, prefix)}):{nim_res_type} =")
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s = f" c_{nim_func_name}("
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for i, param_decl in enumerate(decl['params']):
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if i > 0:
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s += ", "
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arg_name = param_decl['name']
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arg_type = param_decl['type']
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if is_const_struct_ptr(arg_type):
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s += f"unsafeAddr({arg_name})"
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else:
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s += arg_name
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s += ")"
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l(s)
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l("")
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def gen_array_converters(decl, prefix):
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for field in decl['fields']:
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if util.is_array_type(field['type']):
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array_type = util.extract_array_type(field['type'])
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array_sizes = util.extract_array_sizes(field['type'])
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struct_name = as_nim_struct_name(decl, prefix)
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field_name = as_nim_field_name(field, prefix, check_private=False)
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array_base_type = as_nim_type(array_type, prefix)
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if util.is_1d_array_type(field['type']):
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n = array_sizes[0]
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l(f'converter to{struct_name}{field_name}*[N:static[int]](items: array[N, {array_base_type}]): array[{n}, {array_base_type}] =')
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l(f' static: assert(N < {n})')
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l(f' for index,item in items.pairs: result[index]=item')
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l('')
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elif util.is_2d_array_type(field['type']):
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x = array_sizes[1]
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y = array_sizes[0]
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l(f'converter to{struct_name}{field_name}*[Y:static[int], X:static[int]](items: array[Y, array[X, {array_base_type}]]): array[{y}, array[{x}, {array_base_type}]] =')
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l(f' static: assert(X < {x})')
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l(f' static: assert(Y < {y})')
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l(f' for indexY,itemY in items.pairs:')
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l(f' for indexX, itemX in itemY.pairs:')
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l(f' result[indexY][indexX] = itemX')
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l('')
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else:
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sys.exit('Unsupported converter array dimension (> 2)!')
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def pre_parse(inp):
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global struct_types
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global enum_types
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for decl in inp['decls']:
|
|
kind = decl['kind']
|
|
if kind == 'struct':
|
|
struct_types.append(decl['name'])
|
|
elif kind == 'enum':
|
|
enum_name = decl['name']
|
|
enum_types.append(enum_name)
|
|
|
|
def gen_imports(inp, dep_prefixes):
|
|
for dep_prefix in dep_prefixes:
|
|
dep_module_name = module_names[dep_prefix]
|
|
l(f'import {dep_module_name}')
|
|
l('')
|
|
|
|
def gen_extra(inp):
|
|
if inp['prefix'] in ['sg_']:
|
|
# FIXME: remove when sokol-shdc has been integrated!
|
|
l('when defined gl:')
|
|
l(' const gl* = true')
|
|
l(' const d3d11* = false')
|
|
l(' const metal* = false')
|
|
l('elif defined windows:')
|
|
l(' const gl* = false')
|
|
l(' const d3d11* = true')
|
|
l(' const metal* = false')
|
|
l('elif defined macosx:')
|
|
l(' const gl* = false')
|
|
l(' const d3d11* = false')
|
|
l(' const metal* = true')
|
|
l('elif defined linux:')
|
|
l(' const gl* = true')
|
|
l(' const d3d11* = false')
|
|
l(' const metal* = false')
|
|
l('else:')
|
|
l(' error("unsupported platform")')
|
|
l('')
|
|
if inp['prefix'] in ['sg_', 'sapp_']:
|
|
l('when defined windows:')
|
|
l(' when not defined vcc:')
|
|
l(' {.passl:"-lkernel32 -luser32 -lshell32 -lgdi32".}')
|
|
l(' when defined gl:')
|
|
l(' {.passc:"-DSOKOL_GLCORE33".}')
|
|
l(' else:')
|
|
l(' {.passc:"-DSOKOL_D3D11".}')
|
|
l(' when not defined vcc:')
|
|
l(' {.passl:"-ld3d11 -ldxgi".}')
|
|
l('elif defined macosx:')
|
|
l(' {.passc:"-x objective-c".}')
|
|
l(' {.passl:"-framework Cocoa -framework QuartzCore".}')
|
|
l(' when defined gl:')
|
|
l(' {.passc:"-DSOKOL_GLCORE33".}')
|
|
l(' {.passl:"-framework OpenGL".}')
|
|
l(' else:')
|
|
l(' {.passc:"-DSOKOL_METAL".}')
|
|
l(' {.passl:"-framework Metal -framework MetalKit".}')
|
|
l('elif defined linux:')
|
|
l(' {.passc:"-DSOKOL_GLCORE33".}')
|
|
l(' {.passl:"-lX11 -lXi -lXcursor -lGL -lm -ldl -lpthread".}')
|
|
l('else:')
|
|
l(' error("unsupported platform")')
|
|
l('')
|
|
if inp['prefix'] in ['saudio_']:
|
|
l('when defined windows:')
|
|
l(' when not defined vcc:')
|
|
l(' {.passl:"-lkernel32 -lole32".}')
|
|
l('elif defined macosx:')
|
|
l(' {.passl:"-framework AudioToolbox".}')
|
|
l('elif defined linux:')
|
|
l(' {.passl:"-lasound -lm -lpthread".}')
|
|
l('else:')
|
|
l(' error("unsupported platform")')
|
|
l('')
|
|
if inp['prefix'] in ['sg_']:
|
|
l('## Convert a 4-element tuple of numbers to a gfx.Color')
|
|
l('converter toColor*[R:SomeNumber,G:SomeNumber,B:SomeNumber,A:SomeNumber](rgba: tuple [r:R,g:G,b:B,a:A]):Color =')
|
|
l(' Color(r:rgba.r.float32, g:rgba.g.float32, b:rgba.b.float32, a:rgba.a.float32)')
|
|
l('')
|
|
l('## Convert a 3-element tuple of numbers to a gfx.Color')
|
|
l('converter toColor*[R:SomeNumber,G:SomeNumber,B:SomeNumber](rgba: tuple [r:R,g:G,b:B]):Color =')
|
|
l(' Color(r:rgba.r.float32, g:rgba.g.float32, b:rgba.b.float32, a:1.float32)')
|
|
l('')
|
|
# NOTE: this simplistic to_Range() converter has various issues, some of them dangerous:
|
|
# - doesn't work as expected for slice types
|
|
# - it's very easy to create a range that points to invalid memory
|
|
# (so far observed for stack-allocated structs <= 16 bytes)
|
|
#if inp['prefix'] in ['sg_', 'sdtx_', 'sshape_']:
|
|
# l('# helper function to convert "anything" into a Range')
|
|
# l('converter to_Range*[T](source: T): Range =')
|
|
# l(' Range(addr: source.unsafeAddr, size: source.sizeof.uint)')
|
|
# l('')
|
|
c_source_path = '/'.join(c_source_paths[inp['prefix']].split('/')[3:])
|
|
l('{.passc:"-DSOKOL_NIM_IMPL".}')
|
|
l(f'{{.compile:"{c_source_path}".}}')
|
|
|
|
def gen_module(inp, dep_prefixes):
|
|
l('## machine generated, do not edit')
|
|
l('')
|
|
gen_imports(inp, dep_prefixes)
|
|
pre_parse(inp)
|
|
prefix = inp['prefix']
|
|
for decl in inp['decls']:
|
|
if not decl['is_dep']:
|
|
kind = decl['kind']
|
|
if kind == 'consts':
|
|
gen_consts(decl, prefix)
|
|
elif not check_ignore(decl['name']):
|
|
if kind == 'struct':
|
|
gen_struct(decl, prefix)
|
|
gen_array_converters(decl, prefix)
|
|
elif kind == 'enum':
|
|
gen_enum(decl, prefix)
|
|
elif kind == 'func':
|
|
gen_func_nim(decl, prefix)
|
|
gen_extra(inp)
|
|
|
|
def prepare():
|
|
print('=== Generating Nim bindings:')
|
|
if not os.path.isdir('sokol-nim/src/sokol'):
|
|
os.makedirs('sokol-nim/src/sokol')
|
|
if not os.path.isdir('sokol-nim/src/sokol/c'):
|
|
os.makedirs('sokol-nim/src/sokol/c')
|
|
|
|
def gen(c_header_path, c_prefix, dep_c_prefixes):
|
|
if not c_prefix in module_names:
|
|
print(f' >> warning: skipping generation for {c_prefix} prefix...')
|
|
return
|
|
global out_lines
|
|
module_name = module_names[c_prefix]
|
|
c_source_path = c_source_paths[c_prefix]
|
|
print(f' {c_header_path} => {module_name}')
|
|
reset_globals()
|
|
shutil.copyfile(c_header_path, f'sokol-nim/src/sokol/c/{os.path.basename(c_header_path)}')
|
|
ir = gen_ir.gen(c_header_path, c_source_path, module_name, c_prefix, dep_c_prefixes)
|
|
gen_module(ir, dep_c_prefixes)
|
|
output_path = f"sokol-nim/src/sokol/{ir['module']}.nim"
|
|
with open(output_path, 'w', newline='\n') as f_outp:
|
|
f_outp.write(out_lines)
|