diff options
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | time/tst-strptime2.c | 231 |
2 files changed, 185 insertions, 53 deletions
@@ -1,5 +1,12 @@ 2015-08-28 James Perkins <james@loowit.net> + * time/tst-strptime2.c (tests): Replace short list of test + strings for strptime %z specifier with code which exhaustively + tests every combination of sign and 0 to 5 digits. Tests for + rejection of invalid strings. + +2015-08-28 James Perkins <james@loowit.net> + [BZ #16141] * time/strptime_l.c (__strptime_internal): Fix %z minutes calculation, removing incorrect decimal time rounding, so that diff --git a/time/tst-strptime2.c b/time/tst-strptime2.c index 4db8321291..5b06a63ba4 100644 --- a/time/tst-strptime2.c +++ b/time/tst-strptime2.c @@ -1,76 +1,201 @@ +/* tst-strptime2 - Test strptime %z timezone offset specifier. */ + #include <limits.h> +#include <stdbool.h> #include <stdio.h> #include <time.h> +/* Dummy string is used to match strptime's %s specifier. */ + +static const char dummy_string[] = "1113472456"; + +/* buffer_size contains the maximum test string length, including + trailing NUL. */ + +enum +{ + buffer_size = 20, +}; + +/* Verbose execution, set with --verbose command line option. */ + +static bool verbose; + + +/* mkbuf - Write a test string for strptime with the specified time + value and number of digits into the supplied buffer, and return + the expected strptime test result. + + The test string, buf, is written with the following content: + a dummy string matching strptime "%s" format specifier, + whitespace matching strptime " " format specifier, and + timezone string matching strptime "%z" format specifier. + + Note that a valid timezone string contains the following fields: + Sign field consisting of a '+' or '-' sign, + Hours field in two decimal digits, and + optional Minutes field in two decimal digits. + + This function may write test strings with minutes values outside + the valid range 00-59. These are invalid strings and useful for + testing strptime's rejection of invalid strings. + + The ndigits parameter is used to limit the number of timezone + string digits to be written and may range from 0 to 4. Note that + only 2 and 4 digit strings are valid input to strptime; strings + with 0, 1 or 3 digits are invalid and useful for testing strptime's + rejection of invalid strings. + + This function returns the behavior expected of strptime resulting + from parsing the the test string. For valid strings, the function + returns the expected tm_gmtoff value. For invalid strings, + LONG_MAX is returned. LONG_MAX indicates the expectation that + strptime will return NULL; for example, if the number of digits + are not correct, or minutes part of the time is outside the valid + range of 00 to 59. */ -static const struct +static long int +mkbuf (char *buf, bool neg, unsigned int hhmm, size_t ndigits) { - const char *fmt; - long int gmtoff; -} tests[] = - { - { "1113472456 +1000", 36000 }, - { "1113472456 -1000", -36000 }, - { "1113472456 +10", 36000 }, - { "1113472456 -10", -36000 }, - { "1113472456 +1030", 37800 }, - { "1113472456 -1030", -37800 }, - { "1113472456 +0030", 1800 }, - { "1113472456 -0030", -1800 }, - { "1113472456 +1157", 43020 }, - { "1113472456 +1158", 43080 }, - { "1113472456 +1159", 43140 }, - { "1113472456 +1200", 43200 }, - { "1113472456 -1200", -43200 }, - { "1113472456 +1201", 43260 }, - { "1113472456 -1201", -43260 }, - { "1113472456 +1330", 48600 }, - { "1113472456 -1330", -48600 }, - { "1113472456 +1400", 50400 }, - { "1113472456 +1401", 50460 }, - { "1113472456 -2459", -89940 }, - { "1113472456 -2500", -90000 }, - { "1113472456 +2559", 93540 }, - { "1113472456 +2600", 93600 }, - { "1113472456 -99", -356400 }, - { "1113472456 +99", 356400 }, - { "1113472456 -9959", -359940 }, - { "1113472456 +9959", 359940 }, - { "1113472456 -1060", LONG_MAX }, - { "1113472456 +1060", LONG_MAX }, - { "1113472456 1030", LONG_MAX }, - }; -#define ntests (sizeof (tests) / sizeof (tests[0])) + const int mm_max = 59; + char sign = neg ? '-' : '+'; + int i; + unsigned int hh = hhmm / 100; + unsigned int mm = hhmm % 100; + long int expect = LONG_MAX; + i = sprintf (buf, "%s %c", dummy_string, sign); + snprintf (buf + i, ndigits + 1, "%04u", hhmm); + + if (mm <= mm_max && (ndigits == 2 || ndigits == 4)) + { + long int tm_gmtoff = hh * 3600 + mm * 60; + + expect = neg ? -tm_gmtoff : tm_gmtoff; + } + + return expect; +} + + +/* Write a description of expected or actual test result to stdout. */ + +static void +describe (bool string_valid, long int tm_gmtoff) +{ + if (string_valid) + printf ("valid, tm.tm_gmtoff %ld", tm_gmtoff); + else + printf ("invalid, return value NULL"); +} + + +/* Using buffer buf, run strptime. Compare results against expect, + the expected result. Report failures and verbose results to stdout. + Update the result counts. Return 1 if test failed, 0 if passed. */ static int -do_test (void) +compare (const char *buf, long int expect, unsigned int *nresult) { - int result = 0; + struct tm tm; + char *p; + bool test_string_valid; + long int test_result; + bool fail; + int result; + + p = strptime (buf, "%s %z", &tm); + test_string_valid = p != NULL; + test_result = test_string_valid ? tm.tm_gmtoff : LONG_MAX; + fail = test_result != expect; - for (int i = 0; i < ntests; ++i) + if (fail || verbose) { - struct tm tm; + bool expect_string_valid = expect != LONG_MAX; - if (strptime (tests[i].fmt, "%s %z", &tm) == NULL) - { - if (tests[i].gmtoff != LONG_MAX) - { - printf ("round %d: strptime unexpectedly failed\n", i); - result = 1; - } - continue; - } + printf ("%s: input \"%s\", expected: ", fail ? "FAIL" : "PASS", buf); + describe (expect_string_valid, expect); - if (tm.tm_gmtoff != tests[i].gmtoff) + if (fail) { - printf ("round %d: tm_gmtoff is %ld\n", i, (long int) tm.tm_gmtoff); - result = 1; + printf (", got: "); + describe (test_string_valid, test_result); } + + printf ("\n"); } + result = fail ? 1 : 0; + nresult[result]++; + + return result; +} + + +static int +do_test (void) +{ + char buf[buffer_size]; + long int expect; + int result = 0; + /* Number of tests run with passing (index==0) and failing (index==1) + results. */ + unsigned int nresult[2]; + unsigned int ndigits; + unsigned int step; + unsigned int hhmm; + + nresult[0] = 0; + nresult[1] = 0; + + /* Create and test input string with no sign and four digits input + (invalid format). */ + + sprintf (buf, "%s 1030", dummy_string); + expect = LONG_MAX; + result |= compare (buf, expect, nresult); + + /* Create and test input strings with sign and digits: + 0 digits (invalid format), + 1 digit (invalid format), + 2 digits (valid format), + 3 digits (invalid format), + 4 digits (valid format if and only if minutes is in range 00-59, + otherwise invalid). + If format is valid, the returned tm_gmtoff is checked. */ + + for (ndigits = 0, step = 10000; ndigits <= 4; ndigits++, step /= 10) + for (hhmm = 0; hhmm <= 9999; hhmm += step) + { + /* Test both positive and negative signs. */ + + expect = mkbuf (buf, false, hhmm, ndigits); + result |= compare (buf, expect, nresult); + + expect = mkbuf (buf, true, hhmm, ndigits); + result |= compare (buf, expect, nresult); + } + + if (result > 0 || verbose) + printf ("%s: %u input strings: %u fail, %u pass\n", + result > 0 ? "FAIL" : "PASS", + nresult[1] + nresult[0], nresult[1], nresult[0]); + return result; } + +/* Add a "--verbose" command line option to test-skeleton.c. */ + +#define OPT_VERBOSE 10000 + +#define CMDLINE_OPTIONS \ + { "verbose", no_argument, NULL, OPT_VERBOSE, }, + +#define CMDLINE_PROCESS \ + case OPT_VERBOSE: \ + verbose = true; \ + break; + #define TEST_FUNCTION do_test () #include "../test-skeleton.c" |