xfy
376b9fd33c
Add gjson package providing high-performance JSON encoding/decoding for gopher-lua with lua-cjson API compatibility. Uses goccy/go-json as the underlying JSON engine. Features: - Full lua-cjson API compatibility for OpenResty migration - Sparse array detection and handling - Maximum nesting depth control for encode/decode - Number precision control - Independent configuration instances via gjson.new() - gjson.null sentinel for JSON null values Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
104 lines
3.4 KiB
Go
104 lines
3.4 KiB
Go
// Package gjson provides a high-performance JSON encoding/decoding library for gopher-lua.
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//
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// This package is API-compatible with lua-cjson, allowing easy migration from OpenResty.
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// It uses goccy/go-json as the underlying JSON engine for maximum performance.
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//
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// Basic usage:
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//
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// L := glua.NewState()
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// defer L.Close()
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// gjson.Preload(L)
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//
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// err := L.DoString(`
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// local gjson = require("gjson")
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// local data = {name = "Alice", age = 30}
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// local json_str = gjson.encode(data)
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// local decoded = gjson.decode(json_str)
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// `)
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//
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// The package supports:
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// - Full lua-cjson API compatibility
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// - Sparse array detection and handling
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// - Maximum nesting depth control
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// - Number precision control
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// - Independent configuration instances via gjson.new()
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//
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// Author: xfy
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package gjson
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import (
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glua "github.com/yuin/gopher-lua"
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)
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const (
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// ModuleName is the Lua module name for require()
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ModuleName = "gjson"
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// Version is the module version
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Version = "1.0.0"
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)
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// Preload registers the gjson module as a preload in the given LState.
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// This allows Lua scripts to use `local gjson = require("gjson")`.
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func Preload(L *glua.LState) {
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L.PreloadModule(ModuleName, Loader)
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}
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// Loader is the module loader function called by require("gjson").
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func Loader(L *glua.LState) int {
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// Create the gjson module table
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mod := L.NewTable()
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// Create default instance
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instance := &GJSON{
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config: defaultConfig(),
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null: createNull(L),
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}
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// Register module functions (bound to default instance)
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L.SetField(mod, "encode", L.NewFunction(instance.encode))
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L.SetField(mod, "decode", L.NewFunction(instance.decode))
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L.SetField(mod, "encode_sparse_array", L.NewFunction(instance.cfgEncodeSparseArray))
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L.SetField(mod, "encode_max_depth", L.NewFunction(instance.cfgEncodeMaxDepth))
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L.SetField(mod, "decode_max_depth", L.NewFunction(instance.cfgDecodeMaxDepth))
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L.SetField(mod, "encode_number_precision", L.NewFunction(instance.cfgEncodeNumberPrecision))
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L.SetField(mod, "encode_keep_buffer", L.NewFunction(instance.cfgEncodeKeepBuffer))
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L.SetField(mod, "new", L.NewFunction(gjsonNew))
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// Set gjson.null (lightuserdata representing JSON null)
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L.SetField(mod, "null", instance.null)
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// Set module metadata
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L.SetField(mod, "_NAME", glua.LString(ModuleName))
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L.SetField(mod, "_VERSION", glua.LString(Version))
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// Push the module table
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L.Push(mod)
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return 1
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}
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// RegisterGlobal registers the gjson module as a global variable.
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// This allows Lua scripts to use gjson directly without require().
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func RegisterGlobal(L *glua.LState) {
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mod := L.NewTable()
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instance := &GJSON{
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config: defaultConfig(),
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null: createNull(L),
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}
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L.SetField(mod, "encode", L.NewFunction(instance.encode))
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L.SetField(mod, "decode", L.NewFunction(instance.decode))
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L.SetField(mod, "encode_sparse_array", L.NewFunction(instance.cfgEncodeSparseArray))
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L.SetField(mod, "encode_max_depth", L.NewFunction(instance.cfgEncodeMaxDepth))
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L.SetField(mod, "decode_max_depth", L.NewFunction(instance.cfgDecodeMaxDepth))
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L.SetField(mod, "encode_number_precision", L.NewFunction(instance.cfgEncodeNumberPrecision))
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L.SetField(mod, "encode_keep_buffer", L.NewFunction(instance.cfgEncodeKeepBuffer))
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L.SetField(mod, "new", L.NewFunction(gjsonNew))
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L.SetField(mod, "null", instance.null)
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L.SetField(mod, "_NAME", glua.LString(ModuleName))
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L.SetField(mod, "_VERSION", glua.LString(Version))
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L.SetGlobal(ModuleName, mod)
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}
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