feat: Initial commit

.github/workflows/ci.yml

@@ -0,0 +1,29 @@
+name: Build and Test
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+
+jobs:
+  build-and-test:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: "recursive"
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.23"
+
+      - name: Build
+        run: go build -v ./...
+
+      - name: Test
+        run: go test -v ./...

.gitmodules

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+[submodule "tree-sitter"]
+	path = tree-sitter
+	url = [email protected]:tree-sitter/tree-sitter

LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2024 Amaan Qureshi <[email protected]>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

allocator.c

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+#include <stdlib.h>
+
+extern void *go_malloc(size_t size);
+extern void *go_calloc(size_t num, size_t size);
+extern void *go_realloc(void *ptr, size_t size);
+extern void go_free(void *ptr);
+
+void *c_malloc_fn(size_t size) { return go_malloc(size); }
+
+void *c_calloc_fn(size_t num, size_t size) { return go_calloc(num, size); }
+
+void *c_realloc_fn(void *ptr, size_t size) { return go_realloc(ptr, size); }
+
+void c_free_fn(void *ptr) { go_free(ptr); }

allocator.go

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+package tree_sitter
+
+/*
+#cgo CFLAGS: -I${SRCDIR}/tree-sitter/lib/include -I${SRCDIR}/tree-sitter/lib/src -std=c11
+#include <tree_sitter/api.h>
+#include "allocator.h"
+*/
+import "C"
+
+import (
+	"sync/atomic"
+	"unsafe"
+)
+
+var (
+	malloc_fn  atomic.Value
+	calloc_fn  atomic.Value
+	realloc_fn atomic.Value
+	free_fn    atomic.Value
+)
+
+func init() {
+	malloc_fn.Store(func(size C.size_t) unsafe.Pointer {
+		return C.malloc(size)
+	})
+	calloc_fn.Store(func(num, size C.size_t) unsafe.Pointer {
+		return C.calloc(num, size)
+	})
+	realloc_fn.Store(func(ptr unsafe.Pointer, size C.size_t) unsafe.Pointer {
+		return C.realloc(ptr, size)
+	})
+	free_fn.Store(func(ptr unsafe.Pointer) {
+		C.free(ptr)
+	})
+	SetAllocator(nil, nil, nil, nil)
+}
+
+//export go_malloc
+func go_malloc(size C.size_t) unsafe.Pointer {
+	return malloc_fn.Load().(func(C.size_t) unsafe.Pointer)(size)
+}
+
+//export go_calloc
+func go_calloc(num, size C.size_t) unsafe.Pointer {
+	return calloc_fn.Load().(func(C.size_t, C.size_t) unsafe.Pointer)(num, size)
+}
+
+//export go_realloc
+func go_realloc(ptr unsafe.Pointer, size C.size_t) unsafe.Pointer {
+	return realloc_fn.Load().(func(unsafe.Pointer, C.size_t) unsafe.Pointer)(ptr, size)
+}
+
+//export go_free
+func go_free(ptr unsafe.Pointer) {
+	free_fn.Load().(func(unsafe.Pointer))(ptr)
+}
+
+// Sets the memory allocation functions that the core library should use.
+func SetAllocator(
+	newMalloc func(size uint) unsafe.Pointer,
+	newCalloc func(num, size uint) unsafe.Pointer,
+	newRealloc func(ptr unsafe.Pointer, size uint) unsafe.Pointer,
+	newFree func(ptr unsafe.Pointer),
+) {
+	if newMalloc != nil {
+		malloc_fn.Store(func(size C.size_t) unsafe.Pointer {
+			return newMalloc(uint(size))
+		})
+	} else {
+		malloc_fn.Store(func(size C.size_t) unsafe.Pointer {
+			return C.malloc(size)
+		})
+	}
+
+	if newCalloc != nil {
+		calloc_fn.Store(func(num, size C.size_t) unsafe.Pointer {
+			return newCalloc(uint(num), uint(size))
+		})
+	} else {
+		calloc_fn.Store(func(num, size C.size_t) unsafe.Pointer {
+			return C.calloc(num, size)
+		})
+	}
+
+	if newRealloc != nil {
+		realloc_fn.Store(func(ptr unsafe.Pointer, size C.size_t) unsafe.Pointer {
+			return newRealloc(ptr, uint(size))
+		})
+	} else {
+		realloc_fn.Store(func(ptr unsafe.Pointer, size C.size_t) unsafe.Pointer {
+			return C.realloc(ptr, size)
+		})
+	}
+
+	if newFree != nil {
+		free_fn.Store(func(ptr unsafe.Pointer) {
+			newFree(ptr)
+		})
+	} else {
+		free_fn.Store(func(ptr unsafe.Pointer) {
+			C.free(ptr)
+		})
+	}
+
+	C.ts_set_allocator(
+		(*[0]byte)(C.c_malloc_fn),
+		(*[0]byte)(C.c_calloc_fn),
+		(*[0]byte)(C.c_realloc_fn),
+		(*[0]byte)(C.c_free_fn),
+	)
+}

allocator.h

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+#include <stdlib.h>
+
+void *c_malloc_fn(size_t size);
+
+void *c_calloc_fn(size_t num, size_t size);
+
+void *c_realloc_fn(void *ptr, size_t size);
+
+void c_free_fn(void *ptr);

dup_unix.go

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+//go:build linux || darwin
+
+package tree_sitter
+
+/*
+#include <unistd.h>
+*/
+import "C"
+
+// Wrapper for Unix systems
+func dupeFD(fd uintptr) int {
+	return int(C.dup(C.int(fd)))
+}

dup_windows.go

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+//go:build windows
+
+package tree_sitter
+
+/*
+#include <windows.h>
+HANDLE _ts_dup(HANDLE handle);
+*/
+import "C"
+import "unsafe"
+
+// Wrapper for Windows systems
+func dupeFD(handle uintptr) uintptr {
+	hHandle := C.HANDLE(unsafe.Pointer(handle))
+	return uintptr(unsafe.Pointer(C._ts_dup(hHandle)))
+}

edit.go

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+package tree_sitter
+
+/*
+#cgo CFLAGS: -I${SRCDIR}/tree-sitter/lib/include -I${SRCDIR}/tree-sitter/lib/src -std=c11
+#include <tree_sitter/api.h>
+*/
+import "C"
+
+type InputEdit struct {
+	StartByte      uint
+	OldEndByte     uint
+	NewEndByte     uint
+	StartPosition  Point
+	OldEndPosition Point
+	NewEndPosition Point
+}
+
+func (i *InputEdit) ToTSInputEdit() *C.TSInputEdit {
+	return &C.TSInputEdit{
+		start_byte:    C.uint(i.StartByte),
+		old_end_byte:  C.uint(i.OldEndByte),
+		new_end_byte:  C.uint(i.NewEndByte),
+		start_point:   i.StartPosition.toTSPoint(),
+		old_end_point: i.OldEndPosition.toTSPoint(),
+		new_end_point: i.NewEndPosition.toTSPoint(),
+	}
+}
+
+func (i *InputEdit) FromTSInputEdit(edit *C.TSInputEdit) {
+	i.StartByte = uint(edit.start_byte)
+	i.OldEndByte = uint(edit.old_end_byte)
+	i.NewEndByte = uint(edit.new_end_byte)
+	i.StartPosition.fromTSPoint(edit.start_point)
+	i.OldEndPosition.fromTSPoint(edit.old_end_point)
+	i.NewEndPosition.fromTSPoint(edit.new_end_point)
+}