Added a proper config file tokenizer that supports escaping sequences
and comments. This allows for: '"foo bar"' can be represented as 'foo\ bar'. And allows for comments using the hash symbol (#), but not inside escapes or quotes. "#this is not a comment", \#this\ is\ not\ a comment. All configuration file parsers should be rewritten using this functionality.
This commit is contained in:
Jan Vidar Krey
parent
849a791f79
commit
4b22ccb73c
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@ -163,6 +163,7 @@ libadc_common_SOURCES := \
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src/adc/sid.c
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libutils_SOURCES := \
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src/util/config_token.c \
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src/util/ipcalc.c \
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src/util/list.c \
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src/util/log.c \
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@ -192,6 +193,7 @@ autotest_SOURCES := \
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autotest/test_sid.tcc \
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autotest/test_tiger.tcc \
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autotest/test_timer.tcc \
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autotest/test_tokenizer.tcc \
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autotest/test_usermanager.tcc
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autotest_OBJECTS = autotest.o
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@ -0,0 +1,87 @@
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#include <uhub.h>
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#define SETUP(X, STR) struct linked_list* tokens = cfg_tokenize(STR)
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#define CLEANUP(X) do { list_clear(X, hub_free); list_destroy(X); } while(0)
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static int match_str(const char* str1, char* str2)
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{
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size_t i;
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for (i = 0; i < strlen(str2); i++)
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if (str2[i] == '_')
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str2[i] = ' ';
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else if (str2[i] == '|')
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str2[i] = '\t';
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int ret = strcmp(str1, str2);
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if (ret) {
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fprintf(stderr, "\n Mismatch: \"%s\" != \"%s\"\n", str1, str2);
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}
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return ret;
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}
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static int count(const char* STR, size_t EXPECT) {
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SETUP(tokens, STR);
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int pass = list_size(tokens) == EXPECT;
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CLEANUP(tokens);
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return pass;
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}
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static int compare(const char* str, const char* ref) {
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size_t i, max;
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struct linked_list* compare = list_create();
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SETUP(tokens, str);
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split_string(ref, " ", compare, 0);
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int pass = list_size(tokens) == list_size(compare);
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if (pass) {
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max = list_size(tokens);
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for (i = 0; i < max; i++) {
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char* token = (char*) list_get_index(tokens, i);
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char* refer = (char*) list_get_index(compare, i);
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if (match_str(token, refer)) {
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pass = 0;
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break;
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}
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}
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}
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CLEANUP(tokens);
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CLEANUP(compare);
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return pass;
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}
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EXO_TEST(tokenizer_basic_0, { return count("", 0); });
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EXO_TEST(tokenizer_basic_1, { return count("a", 1); });
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EXO_TEST(tokenizer_basic_1a, { return count(" a", 1); })
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EXO_TEST(tokenizer_basic_1b, { return count(" a", 1); })
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EXO_TEST(tokenizer_basic_1c, { return count(" a", 1); })
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EXO_TEST(tokenizer_basic_1d, { return count(" a ", 1); })
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EXO_TEST(tokenizer_basic_1e, { return count(" a ", 1); })
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EXO_TEST(tokenizer_basic_2, { return count("a b", 2); });
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EXO_TEST(tokenizer_basic_2a, { return count(" a b ", 2); });
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EXO_TEST(tokenizer_basic_3, { return count("a b c", 3); });
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EXO_TEST(tokenizer_basic_3a, { return count("a b c", 3); });
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EXO_TEST(tokenizer_basic_3b, { return count("a b c", 3); });
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EXO_TEST(tokenizer_basic_3c, { return count("a b c ", 3); });
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EXO_TEST(tokenizer_basic_3d, { return count("a b c ", 3); });
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EXO_TEST(tokenizer_basic_compare_0, { return compare("value1 value2 value3", "value1 value2 value3"); });
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EXO_TEST(tokenizer_basic_compare_1, { return compare("a b c", "a b c"); });
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EXO_TEST(tokenizer_basic_compare_2, { return compare("a b c", "a b c"); });
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EXO_TEST(tokenizer_basic_compare_3, { return compare(" a b c", "a b c"); });
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EXO_TEST(tokenizer_basic_compare_4, { return compare(" a b c ", "a b c"); });
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EXO_TEST(tokenizer_basic_compare_5, { return compare("a b c ", "a b c"); });
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EXO_TEST(tokenizer_basic_compare_6, { return compare("a b c ", "a b c"); });
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EXO_TEST(tokenizer_comment_1, { return compare("value1 value2 # value3", "value1 value2"); });
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EXO_TEST(tokenizer_comment_2, { return compare("value1 value2\\# value3", "value1 value2# value3"); });
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EXO_TEST(tokenizer_comment_3, { return compare("value1 \"value2#\" value3", "value1 value2# value3"); });
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EXO_TEST(tokenizer_escape_1, { return compare("\"value1\" value2", "value1 value2"); });
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EXO_TEST(tokenizer_escape_2, { return compare("\"value1\\\"\" value2", "value1\" value2"); });
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EXO_TEST(tokenizer_escape_3, { return compare("\"value1\" \"value 2\"", "value1 value_2"); });
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EXO_TEST(tokenizer_escape_4, { return compare("\"value1\" value\\ 2", "value1 value_2"); });
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EXO_TEST(tokenizer_escape_5, { return compare("\"value1\" value\\\\2", "value1 value\\2"); });
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EXO_TEST(tokenizer_escape_6, { return compare("\"value1\" value\\\t2", "value1 value|2"); });
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EXO_TEST(tokenizer_escape_7, { return compare("\"value1\" \"value\t2\"", "value1 value|2"); });
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@ -0,0 +1,148 @@
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/*
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* uhub - A tiny ADC p2p connection hub
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* Copyright (C) 2007-2010, Jan Vidar Krey
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "uhub.h"
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#define ADD_CHAR(X) do { *out = X; out++; token_size++; } while(0)
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#define RESET_TOKEN do { ADD_CHAR('\0'); out = buffer; if (add_token(tokens, out)) token_count++; token_size = 0; buffer[0] = '\0'; } while (0)
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static int add_token(struct linked_list* list, const char* token)
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{
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if (*token)
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{
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list_append(list, hub_strdup(token));
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return 1;
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}
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return 0;
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}
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struct linked_list* cfg_tokenize(const char* line)
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{
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struct linked_list* tokens = list_create();
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char* buffer = hub_malloc_zero(strlen(line));
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char* out = buffer;
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const char* p = line;
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int backslash = 0;
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char quote = 0;
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size_t token_count = 0;
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size_t token_size = 0;
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for (; *p; p++)
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{
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switch (*p)
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{
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case '\\':
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if (backslash)
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{
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ADD_CHAR('\\');
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backslash = 0;
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}
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else
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{
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backslash = 1;
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}
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break;
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case '#':
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if (backslash)
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{
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ADD_CHAR('#');
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backslash = 0;
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}
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else if (quote)
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{
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ADD_CHAR('#');
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}
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else
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{
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RESET_TOKEN;
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return tokens;
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}
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break;
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case '\"':
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if (backslash)
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{
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ADD_CHAR('\"');
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backslash = 0;
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}
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else if (quote)
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{
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quote = 0;
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}
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else
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{
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quote = 1;
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}
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break;
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case '\r':
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/* Pretend it does not exist! */
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break;
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case ' ':
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case '\t':
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if (quote)
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{
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ADD_CHAR(*p);
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}
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else if (backslash)
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{
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ADD_CHAR(*p);
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backslash = 0;
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}
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else
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{
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RESET_TOKEN;
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}
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break;
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default:
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ADD_CHAR(*p);
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}
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}
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RESET_TOKEN;
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return tokens;
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}
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void cfg_tokens_free(struct linked_list* list)
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{
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list_clear(list, hub_free);
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list_destroy(list);
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}
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/*
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size_t cfg_token_count(const char* line)
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{
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if (!line || !*line)
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return 0;
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}
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char* cfg_token_get(const char* line, size_t token)
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{
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}
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char* cfg_token_add(const char* line, char* new_token)
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{
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}
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*/
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@ -0,0 +1,33 @@
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/*
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* uhub - A tiny ADC p2p connection hub
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* Copyright (C) 2007-2010, Jan Vidar Krey
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef HAVE_UHUB_CONFIG_TOKEN_H
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#define HAVE_UHUB_CONFIG_TOKEN_H
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struct linked_list;
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struct linked_list* cfg_tokenize(const char* line);
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void cfg_tokens_free(struct linked_list*);
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size_t cfg_token_count(const char* line);
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char* cfg_token_get(const char* line, size_t token);
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char* cfg_token_add(const char* line, char* new_token);
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#endif /* HAVE_UHUB_CONFIG_TOKEN_H */
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