Class: IOSParser::CLexer

Inherits:
Object
  • Object
show all
Defined in:
ext/ios_parser/c_lexer/lexer.c

Instance Method Summary collapse

Constructor Details

#initialize(input_text) ⇒ Object 



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# File 'ext/ios_parser/c_lexer/lexer.c', line 204

static VALUE initialize(VALUE self, VALUE input_text) {
    LexInfo *lex;
    Data_Get_Struct(self, LexInfo, lex);

    lex->text = NULL;
    lex->pos = 0;
    lex->line = 1;
    lex->start_of_line = 0;
    lex->token_line = 0;
    lex->token_start = 0;
    lex->token_length = 0;
    lex->token_state = LEX_STATE_ROOT;
    lex->tokens = rb_ary_new();

    lex->indent = 0;
    lex->indent_pos = 0;
    lex->indents[0] = 0;

    return self;
}

Instance Method Details

#call(input_text) ⇒ Object 



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# File 'ext/ios_parser/c_lexer/lexer.c', line 530

static VALUE call(VALUE self, VALUE input_text) {
    LexInfo *lex;
    size_t input_len;

    if (TYPE(input_text) != T_STRING) {
        rb_raise(rb_eTypeError, "The argument to CLexer#call must be a String.");
        return Qnil;
    }

    Data_Get_Struct(self, LexInfo, lex);

    StringValue(input_text);
    lex->text = RSTRING_PTR(input_text);
    input_len = RSTRING_LEN(input_text);

    for (lex->pos = 0; lex->pos < input_len; lex->pos++) {
        switch(lex->token_state) {
        case (LEX_STATE_ROOT):
            process_root(lex);
            break;

        case (LEX_STATE_INDENT):
            process_start_of_line(lex);
            break;

        case (LEX_STATE_INTEGER):
            process_integer(lex);
            break;

        case (LEX_STATE_DECIMAL):
            process_decimal(lex);
            break;

        case (LEX_STATE_QUOTED_STRING):
            process_quoted_string(lex);
            break;

        case (LEX_STATE_WORD):
            process_word(lex);
            break;

        case (LEX_STATE_COMMENT):
            process_comment(lex);
            break;

        case (LEX_STATE_BANNER):
            process_banner(lex);
            break;

        case (LEX_STATE_CERTIFICATE):
            process_certificate(lex);
            break;
        }
    }

    if (lex->token_state == LEX_STATE_QUOTED_STRING) {
        rb_raise(rb_eLexError,
                 "Unterminated quoted string starting at %d: %.*s",
                 (int)lex->token_start,
                 (int)lex->token_length, &lex->text[lex->token_start]);
    }

    delimit(lex);
    lex->token_start = lex->pos - 1;
    lex->line = lex->line - 1;

    for (; lex->indent_pos > 0; lex->indent_pos--) {
        ADD_TOKEN(lex, ID2SYM(rb_intern("DEDENT")));
    }

    return lex->tokens;
}