yaml-libyaml/tests/test-reader.c

#include <yaml/yaml.h>

#include <stdlib.h>
#include <stdio.h>
#include <assert.h>

/*
 * Test cases are stolen from
 * http://www.cl.cam.ac.uk/~mgk25/ucs/examples/UTF-8-test.txt
 */

typedef struct {
    char *title;
    char *test;
    int result;
} test_case;

test_case utf8_sequences[] = {
        /* {"title", "test 1|test 2|...|test N!", (0 or 1)}, */

        {"a simple test", "'test' is '\xd0\xbf\xd1\x80\xd0\xbe\xd0\xb2\xd0\xb5\xd1\x80\xd0\xba\xd0\xb0' in Russian!", 1},
        {"an empty line", "!", 1},

        {"u-0 is a control character", "\x00!", 0},
        {"u-80 is a control character", "\xc2\x80!", 0},
        {"u-800 is valid", "\xe0\xa0\x80!", 1},
        {"u-10000 is valid", "\xf0\x90\x80\x80!", 1},
        {"5 bytes sequences are not allowed", "\xf8\x88\x80\x80\x80!", 0},
        {"6 bytes sequences are not allowed", "\xfc\x84\x80\x80\x80\x80!", 0},

        {"u-7f is a control character", "\x7f!", 0},
        {"u-7FF is valid", "\xdf\xbf!", 1},
        {"u-FFFF is a control character", "\xef\xbf\xbf!", 0},
        {"u-1FFFFF is too large", "\xf7\xbf\xbf\xbf!", 0},
        {"u-3FFFFFF is 5 bytes", "\xfb\xbf\xbf\xbf\xbf!", 0},
        {"u-7FFFFFFF is 6 bytes", "\xfd\xbf\xbf\xbf\xbf\xbf!", 0},

        {"u-D7FF", "\xed\x9f\xbf!", 1},
        {"u-E000", "\xee\x80\x80!", 1},
        {"u-FFFD", "\xef\xbf\xbd!", 1},
        {"u-10FFFF", "\xf4\x8f\xbf\xbf!", 1},
        {"u-110000", "\xf4\x90\x80\x80!", 0},

        {"first continuation byte", "\x80!", 0},
        {"last continuation byte", "\xbf!", 0},

        {"2 continuation bytes", "\x80\xbf!", 0},
        {"3 continuation bytes", "\x80\xbf\x80!", 0},
        {"4 continuation bytes", "\x80\xbf\x80\xbf!", 0},
        {"5 continuation bytes", "\x80\xbf\x80\xbf\x80!", 0},
        {"6 continuation bytes", "\x80\xbf\x80\xbf\x80\xbf!", 0},
        {"7 continuation bytes", "\x80\xbf\x80\xbf\x80\xbf\x80!", 0},

        {"sequence of all 64 possible continuation bytes",
         "\x80|\x81|\x82|\x83|\x84|\x85|\x86|\x87|\x88|\x89|\x8a|\x8b|\x8c|\x8d|\x8e|\x8f|"
         "\x90|\x91|\x92|\x93|\x94|\x95|\x96|\x97|\x98|\x99|\x9a|\x9b|\x9c|\x9d|\x9e|\x9f|"
         "\xa0|\xa1|\xa2|\xa3|\xa4|\xa5|\xa6|\xa7|\xa8|\xa9|\xaa|\xab|\xac|\xad|\xae|\xaf|"
         "\xb0|\xb1|\xb2|\xb3|\xb4|\xb5|\xb6|\xb7|\xb8|\xb9|\xba|\xbb|\xbc|\xbd|\xbe|\xbf!", 0},
        {"32 first bytes of 2-byte sequences {0xc0-0xdf}",
         "\xc0 |\xc1 |\xc2 |\xc3 |\xc4 |\xc5 |\xc6 |\xc7 |\xc8 |\xc9 |\xca |\xcb |\xcc |\xcd |\xce |\xcf |"
         "\xd0 |\xd1 |\xd2 |\xd3 |\xd4 |\xd5 |\xd6 |\xd7 |\xd8 |\xd9 |\xda |\xdb |\xdc |\xdd |\xde |\xdf !", 0},
        {"16 first bytes of 3-byte sequences {0xe0-0xef}",
         "\xe0 |\xe1 |\xe2 |\xe3 |\xe4 |\xe5 |\xe6 |\xe7 |\xe8 |\xe9 |\xea |\xeb |\xec |\xed |\xee |\xef !", 0},
        {"8 first bytes of 4-byte sequences {0xf0-0xf7}", "\xf0 |\xf1 |\xf2 |\xf3 |\xf4 |\xf5 |\xf6 |\xf7 !", 0},
        {"4 first bytes of 5-byte sequences {0xf8-0xfb}", "\xf8 |\xf9 |\xfa |\xfb !", 0},
        {"2 first bytes of 6-byte sequences {0xfc-0xfd}", "\xfc |\xfd !", 0},

        {"sequences with last byte missing {u-0}",
         "\xc0|\xe0\x80|\xf0\x80\x80|\xf8\x80\x80\x80|\xfc\x80\x80\x80\x80!", 0},
        {"sequences with last byte missing {u-...FF}",
         "\xdf|\xef\xbf|\xf7\xbf\xbf|\xfb\xbf\xbf\xbf|\xfd\xbf\xbf\xbf\xbf!", 0},

        {"impossible bytes", "\xfe|\xff|\xfe\xfe\xff\xff!", 0},

        {"overlong sequences {u-2f}",
         "\xc0\xaf|\xe0\x80\xaf|\xf0\x80\x80\xaf|\xf8\x80\x80\x80\xaf|\xfc\x80\x80\x80\x80\xaf!", 0},

        {"maximum overlong sequences",
         "\xc1\xbf|\xe0\x9f\xbf|\xf0\x8f\xbf\xbf|\xf8\x87\xbf\xbf\xbf|\xfc\x83\xbf\xbf\xbf\xbf!", 0},

        {"overlong representation of the NUL character",
         "\xc0\x80|\xe0\x80\x80|\xf0\x80\x80\x80|\xf8\x80\x80\x80\x80|\xfc\x80\x80\x80\x80\x80!", 0},

        {"single UTF-16 surrogates",
         "\xed\xa0\x80|\xed\xad\xbf|\xed\xae\x80|\xed\xaf\xbf|\xed\xb0\x80|\xed\xbe\x80|\xed\xbf\xbf!", 0},

        {"paired UTF-16 surrogates",
         "\xed\xa0\x80\xed\xb0\x80|\xed\xa0\x80\xed\xbf\xbf|\xed\xad\xbf\xed\xb0\x80|"
         "\xed\xad\xbf\xed\xbf\xbf|\xed\xae\x80\xed\xb0\x80|\xed\xae\x80\xed\xbf\xbf|"
         "\xed\xaf\xbf\xed\xb0\x80|\xed\xaf\xbf\xed\xbf\xbf!", 0},

        {"other illegal code positions", "\xef\xbf\xbe|\xef\xbf\xbf!", 0},

        {NULL, NULL, 0}
};

int check_utf8_sequences(void)
{
    yaml_parser_t *parser;
    int failed = 0;
    int k;
    printf("checking utf-8 sequences...\n");
    for (k = 0; utf8_sequences[k].test; k++) {
        char *title = utf8_sequences[k].title;
        int check = utf8_sequences[k].result;
        int result;
        char *start = utf8_sequences[k].test;
        char *end = start;
        printf("\t%s:\n", title);
        while(1) {
            while (*end != '|' && *end != '!') end++;
            parser = yaml_parser_new();
            assert(parser);
            yaml_parser_set_input_string(parser, (unsigned char *)start, end-start);
            result = yaml_parser_update_buffer(parser, end-start);
            if (result != check) {
                printf("\t\t- ");
                failed ++;
            }
            else {
                printf("\t\t+ ");
            }
            if (!parser->error) {
                printf("(no error)\n");
            }
            else if (parser->error == YAML_READER_ERROR) {
                printf("(reader error: %s at %d)\n", parser->problem, parser->problem_offset);
            }
            if (*end == '!') break;
            start = ++end;
            yaml_parser_delete(parser);
        };
        printf("\n");
    }
    printf("checking utf-8 sequences: %d fail(s)\n", failed);
    return failed;
}


int
main(void)
{
    return check_utf8_sequences();
}