https://github.com/yeshan333/calling-c-func-in-lua-demo

For comparing the difference of the C API luaL_tolstring of two lua versions
https://github.com/yeshan333/calling-c-func-in-lua-demo

c lua lua-c makefile xmake

Last synced: 9 days ago
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For comparing the difference of the C API luaL_tolstring of two lua versions

• Host: GitHub
• URL: https://github.com/yeshan333/calling-c-func-in-lua-demo
• Owner: yeshan333
• Created: 2024-07-14T15:45:08.000Z (7 months ago)
• Default Branch: main
• Last Pushed: 2024-07-30T09:35:02.000Z (6 months ago)
• Last Synced: 2025-01-19T15:11:34.698Z (16 days ago)
• Topics: c, lua, lua-c, makefile, xmake
• Language: C
• Homepage:
• Size: 775 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
# 在 lua 脚本中调用 C 函数

[English](README_en.md)

> 用于对比两个 lua 版本 C API luaL_tolstring 的表现

## 快速开始

```shell

# 安装两个 lua 版本

make install_lua

# 编译自定义 C 库

make compile_cmp1_so

# 测试版本 1，lua C API luaL_tolstring 的表现

make test_cmp1

# 测试版本 2，lua C API luaL_tolstring 的表现

make compile_cmp2_so

make test_cmp2

```

使用 xmake 编译

```shell

# 指定 lua 版本进行编译 mylib.c

xmake f --lua_version=5.4.6 -v

xmake -v

# 测试版本 1 lua 5.4.7，lua C API luaL_tolstring 的表现

make test_cmp1

# 测试版本 2 lua 5.4.6，lua C API luaL_tolstring 的表现

make test_cmp2

```

---

```c

static int my_printer(lua_State *L)

{

    size_t len;

    const int arg1 = luaL_checkinteger(L, 1);

    printf("arg1: %d\n", arg1);

    const uint8_t* s = (const uint8_t*)luaL_tolstring(L, 2, &len);

    printf("my printer's output: %s, length: %zu\n", s, len);

    // lua_pushstring(L, s);

    return 0;

}

```

Compare Result (test my_printer func):

```shell

# lua 5.4.7

echo "Testing lua version: lua-5.4.7"

Testing lua version: lua-5.4.7

/github/calling-c-func-in-lua-demo/lua-5.4.7/install/bin/lua test_printer.lua

arg1: 1

my printer's output: Oh my god, length: 9

arg1: 2

my printer's output: Oh my god, length: 9

arg1: 3

my printer's output: Oh my god, length: 9

```

```shell

echo "Testing lua version: lua-5.4.6"

Testing lua version: lua-5.4.6

/github/calling-c-func-in-lua-demo/lua-5.4.6/install/bin/lua test_printer.lua

arg1: 1

my printer's output: Oh my god, length: 9

arg1: 2

my printer's output: Oh my god, length: 9

arg1: 3

my printer's output: Oh my god, length: 9

```

##  参考

https://www.nosuchfield.com/2019/05/17/Call-C-function-in-Lua/

http://www.troubleshooters.com/codecorn/lua/lua_lua_calls_c.htm