add support for export and import symbols
adds a lot of improvement to the script - proper CLI - generate a api_require.h which contains a function that export the symbols
This commit is contained in:
takase1121
parent
46f9bcb90c
commit
a9d7ddc6e1
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@ -23,16 +23,19 @@ discard_preprocessors() {
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# sed regex for extracting data from function signature
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# if this isn't regex, idk what is
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# LUA_API (return type as \2) (function name as \3) (args as \4)
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sym_regex='^LUA\(LIB\)\?_API\s\+\([^(]\+\)\s*(\([^)]\+\))\s\+(\([^)]\+\))'
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sym_regex='^LUA\(LIB\)\?_API\s\+\([^(]\+\)\s*(\([^)]\+\))\s\+(\([^)]\+\));'
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# get funcptr declarations
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ptrize() {
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grep '^LUA' | sed -e "s/$sym_regex/static \2(*\3) (\4)/"
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grep '^LUA' | sed -e "s/$sym_regex/static \2(*\3) (\4);/"
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}
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import_sym() {
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grep '^LUA' | sed -e "s/$sym_regex/\tIMPORT_SYMBOL(\3, \2, \4);/"
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}
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export_sym() {
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# don't even bother reading this again
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grep '^LUA' | sed -e "s/$sym_regex/\tIMPORT_SYMBOL(\3, \2, \4)/"
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grep '^LUA' | sed -e "s/$sym_regex/\t\tEXPORT_SYMBOL(\3),/"
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}
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decl() {
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@ -47,48 +50,134 @@ decl() {
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grep '^#' <<< "$header"
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}
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decl_import() {
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uncomment $1 | onelineize | import_sym
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}
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decl_export() {
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uncomment $1 | onelineize | export_sym
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}
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LUA_PATH="$1"
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cat << EOF
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/**
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The lite_xl plugin API is quite simple. Any shared library can be a plugin file, so long
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as it has an entrypoint that looks like the following, where xxxxx is the plugin name:
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#include "lite_xl_plugin_api.h"
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int lua_open_lite_xl_xxxxx(lua_State* L, void* XL) {
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lite_xl_plugin_init(XL);
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...
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return 1;
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generate_header() {
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local LUA_PATH="$1"
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echo "#ifndef LITE_XL_PLUGIN_API"
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echo "#define LITE_XL_PLUGIN_API"
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echo "/**"
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echo "The lite_xl plugin API is quite simple. Any shared library can be a plugin file, so long"
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echo "as it has an entrypoint that looks like the following, where xxxxx is the plugin name:"
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echo '#include "lite_xl_plugin_api.h"'
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echo "int lua_open_lite_xl_xxxxx(lua_State* L, void* XL) {"
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echo " lite_xl_plugin_init(XL);"
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echo " ..."
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echo " return 1;"
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echo "}"
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echo "In linux, to compile this file, you'd do: 'gcc -o xxxxx.so -shared xxxxx.c'. Simple!"
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echo "Due to the way the API is structured, you *should not* link or include lua libraries."
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echo "This file was automatically generated by the below code. DO NOT MODIFY DIRECTLY."
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echo
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echo
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cat "$0"
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echo "**/"
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echo "#include <stddef.h>"
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decl "$LUA_PATH/lua.h"
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decl "$LUA_PATH/lauxlib.h"
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echo "#define IMPORT_SYMBOL(name, ret, ...) name = (ret (*) (__VA_ARGS__)) symbol(#name)"
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echo "static void lite_xl_plugin_init(void *XL) {"
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echo -e "\tvoid* (*symbol)(const char *) = (void* (*) (const char *)) XL;"
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decl_import "$LUA_PATH/lua.h"
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decl_import "$LUA_PATH/lauxlib.h"
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echo "}"
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echo "#endif"
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}
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In linux, to compile this file, you'd do: 'gcc -o xxxxx.so -shared xxxxx.c'. Simple!
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Due to the way the API is structured, you *should not* link or include lua libraries.
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This file was automatically generated by the below code. Do NOT MODIFY DIRECTLY.
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generate_api_require() {
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local LUA_PATH="$1"
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echo "#ifndef API_REQUIRE_H"
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echo "#define API_REQUIRE_H"
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echo "/**"
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echo "This file contains the function api_require that"
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echo "returns a function pointer with it's corresponding name."
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echo
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echo "This file is automatically generated. DO NOT MODIFY."
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echo "*/"
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echo "#include <string.h>"
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echo "#include <stddef.h>"
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echo '#include "lua.h"'
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echo '#include "lauxlib.h"'
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echo
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echo "typedef struct fnptr_s {"
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echo -e "\tconst char* name;"
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echo -e "\tvoid *addr;"
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echo "} fnptr_t;"
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echo
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echo "#define EXPORT_SYMBOL(SYM) { #SYM, (void*)(SYM) }"
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echo "static void *api_require(const char *symbol) {"
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echo -e "\tstatic fnptr_t nodes[] = {"
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EOF
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decl_export "$LUA_PATH/lua.h"
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decl_export "$LUA_PATH/lauxlib.h"
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cat "$0"
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echo -e "\t};"
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echo -e "\tfor (int i = 0; i < sizeof(nodes) / sizeof(fnptr_t); i++)"
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echo -e "\t\tif (strcmp(nodes[i].name, symbol) == 0)"
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echo -e "\t\t\treturn nodes[i].addr;"
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echo -e "\treturn NULL;"
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echo "}"
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echo "#endif"
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}
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cat << EOF
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**/
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show_help() {
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echo -e "Usage: $0 <OPTIONS> prefix"
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echo
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echo -e "Available options:"
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echo
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echo -e "-a\t--api-header\tGenerate lite_xl_plugin_api.h"
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echo -e "-b\t--api-require\tGenerate api_require.h"
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echo -e "-p\t--prefix\tSet prefix (where to find lua.h and lauxlib.h)"
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}
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main() {
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local header=0
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local require=0
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local prefix=""
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#ifndef LITE_XL_PLUGIN_API
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#define LITE_XL_PLUGIN_API
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EOF
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for i in "$@"; do
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case $i in
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-h|--help)
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show_help
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exit 0
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;;
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-a|--api-header)
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header=1
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shift
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;;
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-b|--api-require)
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require=1
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shift
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;;
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-p|--prefix)
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prefix="$2"
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shift
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shift
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;;
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*)
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;;
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esac
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done
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decl "$LUA_PATH/lua.h"
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decl "$LUA_PATH/lauxlib.h"
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if [[ "$header" -eq 1 ]]; then
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generate_header "$prefix"
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elif [[ "$require" -eq 1 ]]; then
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generate_api_require "$prefix"
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else
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show_help
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exit 1
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fi
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}
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echo "#define IMPORT_SYMBOL(name, ret, ...) name = (ret (*) (__VA_ARGS__)) symbol(#name)"
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echo "static void lite_xl_plugin_init(void *XL) {"
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echo -e "\tvoid* (*symbol)(const char *) = (void* (*) (const char *)) XL;"
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decl_export "$LUA_PATH/lua.h"
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decl_export "$LUA_PATH/lauxlib.h"
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echo "}"
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echo "#endif"
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main "$@"
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