/**
* Builds a script buffer and adds its code to the bytecode output buffer and
* stores references to its functions and variables in the Compiler object.
* After several input buffers of scripts have been built, you can copy the
* bytecode to a buffer for execution using compiler_bytecode().
* compiler: an instance of compiler that will receive the bytecode.
* input: an input buffer that contains the script code.
* inputLen: the number of bytes in length of the input.
* returns: true if the compile operation succeeds, and false if it fails.
*/
bool compiler_build(Compiler * compiler, char * input, size_t inputLen) {
assert(compiler != NULL);
assert(input != NULL);
assert(inputLen > 0);
Lexer * lexer = lexer_new(input, inputLen);
LexerType type;
size_t tokenLen;
/* check that lexer alloc didn't fail, and push symtbl for global variables */
if(lexer == NULL || !symtblstk_push(compiler)) {
compiler_set_err(compiler, COMPILERERR_ALLOC_FAILED);
lexer_free(lexer);
return false;
}
compiler_set_err(compiler, COMPILERERR_SUCCESS);
/* get first token */
lexer_next(lexer, &type, &tokenLen);
/* handle script imports/"depends" */
if(!parse_dependencies(compiler, lexer)) {
return false;
}
/* compile loop */
while(lexer_current_token(lexer, &type, &tokenLen) != NULL) {
parse_function_definitions(compiler, lexer);
/* handle errors */
if(lexer_get_err(lexer) != LEXERERR_SUCCESS) {
compiler->err = COMPILERERR_LEXER_ERR;
compiler->lexerErr = lexer_get_err(lexer);
compiler->errorLineNum = lexer_line_num(lexer);
}
if(compiler->err != COMPILERERR_SUCCESS) {
compiler->lexerErr = lexer_get_err(lexer);
compiler->errorLineNum = lexer_line_num(lexer);
lexer_free(lexer);
return false;
}
}
/* we're done here: pop globals symtable */
symtbl_free(symtblstk_pop(compiler));
lexer_free(lexer);
return true;
}
static int config_parse(struct darray *sections, const char *file,
bool always_open)
{
char *file_data;
struct lexer lex;
struct base_token token;
struct strref section_name;
FILE *f;
f = os_fopen(file, "rb");
if (always_open && !f)
f = os_fopen(file, "w+");
if (!f)
return CONFIG_FILENOTFOUND;
os_fread_utf8(f, &file_data);
fclose(f);
if (!file_data)
return CONFIG_SUCCESS;
lexer_init(&lex);
lexer_start_move(&lex, file_data);
base_token_clear(&token);
while (lexer_getbasetoken(&lex, &token, PARSE_WHITESPACE)) {
struct config_section *section;
while (token.type == BASETOKEN_WHITESPACE) {
if (!lexer_getbasetoken(&lex, &token, PARSE_WHITESPACE))
goto complete;
}
if (*token.text.array != '[') {
while (!is_newline(*token.text.array)) {
if (!lexer_getbasetoken(&lex, &token,
PARSE_WHITESPACE))
goto complete;
}
continue;
}
strref_clear(§ion_name);
config_parse_string(&lex, §ion_name, ']');
if (!section_name.len)
break;
section = darray_push_back_new(sizeof(struct config_section),
sections);
section->name = bstrdup_n(section_name.array,
section_name.len);
config_parse_section(section, &lex);
}
complete:
lexer_free(&lex);
return CONFIG_SUCCESS;
}
static int config_parse_file(struct darray *sections, const char *file,
bool always_open)
{
char *file_data;
struct lexer lex;
FILE *f;
f = os_fopen(file, "rb");
if (always_open && !f)
f = os_fopen(file, "w+");
if (!f)
return CONFIG_FILENOTFOUND;
os_fread_utf8(f, &file_data);
fclose(f);
if (!file_data)
return CONFIG_SUCCESS;
lexer_init(&lex);
lexer_start_move(&lex, file_data);
parse_config_data(sections, &lex);
lexer_free(&lex);
return CONFIG_SUCCESS;
}
void cf_lexer_free(struct cf_lexer *lex)
{
bfree(lex->file);
bfree(lex->reformatted);
lexer_free(&lex->base_lexer);
da_free(lex->tokens);
lex->file = NULL;
lex->reformatted = NULL;
lex->write_offset = NULL;
lex->unexpected_eof = false;
}
int config_open_string(config_t **config, const char *str)
{
struct lexer lex;
if (!config)
return CONFIG_ERROR;
*config = bzalloc(sizeof(struct config_data));
if (!*config)
return CONFIG_ERROR;
(*config)->file = NULL;
lexer_init(&lex);
lexer_start(&lex, str);
parse_config_data(&(*config)->sections, &lex);
lexer_free(&lex);
return CONFIG_SUCCESS;
}
inline ~BaseLexer() {lexer_free(&lex);}
void cleanup() {
lexer_free();
freeobj(literalTable);
vm_free();
}
