111 lines
3.6 KiB
C
111 lines
3.6 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "mpconfig.h"
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#include "misc.h"
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#include "repl.h"
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#if MICROPY_HELPER_REPL
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bool str_startswith_word(const char *str, const char *head) {
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int i;
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for (i = 0; str[i] && head[i]; i++) {
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if (str[i] != head[i]) {
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return false;
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}
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}
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return head[i] == '\0' && (str[i] == '\0' || !unichar_isalpha(str[i]));
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}
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bool mp_repl_continue_with_input(const char *input) {
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// check for blank input
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if (input[0] == '\0') {
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return false;
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}
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// check if input starts with a certain keyword
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bool starts_with_compound_keyword =
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input[0] == '@'
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|| str_startswith_word(input, "if")
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|| str_startswith_word(input, "while")
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|| str_startswith_word(input, "for")
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|| str_startswith_word(input, "try")
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|| str_startswith_word(input, "with")
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|| str_startswith_word(input, "def")
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|| str_startswith_word(input, "class")
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;
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// check for unmatched open bracket or triple quote
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// TODO don't look at triple quotes inside single quotes
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int n_paren = 0;
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int n_brack = 0;
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int n_brace = 0;
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int in_triple_quote = 0;
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const char *i;
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for (i = input; *i; i++) {
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switch (*i) {
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case '(': n_paren += 1; break;
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case ')': n_paren -= 1; break;
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case '[': n_brack += 1; break;
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case ']': n_brack -= 1; break;
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case '{': n_brace += 1; break;
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case '}': n_brace -= 1; break;
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case '\'':
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if (in_triple_quote != '"' && i[1] == '\'' && i[2] == '\'') {
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i += 2;
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in_triple_quote = '\'' - in_triple_quote;
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}
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break;
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case '"':
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if (in_triple_quote != '\'' && i[1] == '"' && i[2] == '"') {
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i += 2;
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in_triple_quote = '"' - in_triple_quote;
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}
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break;
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}
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}
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// continue if unmatched brackets or quotes
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if (n_paren > 0 || n_brack > 0 || n_brace > 0 || in_triple_quote != 0) {
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return true;
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}
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// continue if last character was backslash (for line continuation)
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if (i[-1] == '\\') {
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return true;
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}
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// continue if compound keyword and last line was not empty
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if (starts_with_compound_keyword && i[-1] != '\n') {
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return true;
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}
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// otherwise, don't continue
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return false;
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}
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#endif // MICROPY_HELPER_REPL
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