236 lines
6.4 KiB
C
236 lines
6.4 KiB
C
/* tst-strptime2 - Test strptime %z timezone offset specifier. */
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#include <limits.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <time.h>
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#include <libc-internal.h>
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/* Dummy string is used to match strptime's %s specifier. */
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static const char dummy_string[] = "1113472456";
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/* buffer_size contains the maximum test string length, including
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trailing NUL. */
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enum
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{
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buffer_size = 20,
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};
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/* Verbose execution, set with --verbose command line option. */
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static bool verbose;
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/* mkbuf - Write a test string for strptime with the specified time
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value and number of digits into the supplied buffer, and return
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the expected strptime test result.
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The test string, buf, is written with the following content:
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a dummy string matching strptime "%s" format specifier,
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whitespace matching strptime " " format specifier, and
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timezone string matching strptime "%z" format specifier.
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Note that a valid timezone string is either "Z" or contains the
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following fields:
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Sign field consisting of a '+' or '-' sign,
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Hours field in two decimal digits, and
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optional Minutes field in two decimal digits. Optionally,
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a ':' is used to seperate hours and minutes.
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This function may write test strings with minutes values outside
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the valid range 00-59. These are invalid strings and useful for
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testing strptime's rejection of invalid strings.
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The ndigits parameter is used to limit the number of timezone
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string digits to be written and may range from 0 to 4. Note that
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only 2 and 4 digit strings are valid input to strptime; strings
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with 0, 1 or 3 digits are invalid and useful for testing strptime's
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rejection of invalid strings.
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This function returns the behavior expected of strptime resulting
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from parsing the the test string. For valid strings, the function
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returns the expected tm_gmtoff value. For invalid strings,
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LONG_MAX is returned. LONG_MAX indicates the expectation that
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strptime will return NULL; for example, if the number of digits
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are not correct, or minutes part of the time is outside the valid
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range of 00 to 59. */
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static long int
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mkbuf (char *buf, bool neg, bool colon, unsigned int hhmm, size_t ndigits)
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{
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const int mm_max = 59;
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char sign = neg ? '-' : '+';
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int i;
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unsigned int hh = hhmm / 100;
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unsigned int mm = hhmm % 100;
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long int expect = LONG_MAX;
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i = sprintf (buf, "%s %c", dummy_string, sign);
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#if __GNUC_PREREQ (7, 0)
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/* GCC issues a warning when it thinks the snprintf buffer may be too short.
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This test is explicitly using short buffers to force snprintf to truncate
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the output so we ignore the warnings. */
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DIAG_PUSH_NEEDS_COMMENT;
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DIAG_IGNORE_NEEDS_COMMENT (7.0, "-Wformat-length");
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#endif
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if (colon)
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snprintf (buf + i, ndigits + 2, "%02u:%02u", hh, mm);
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else
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snprintf (buf + i, ndigits + 1, "%04u", hhmm);
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#if __GNUC_PREREQ (7, 0)
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DIAG_POP_NEEDS_COMMENT;
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#endif
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if (mm <= mm_max && (ndigits == 2 || ndigits == 4))
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{
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long int tm_gmtoff = hh * 3600 + mm * 60;
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expect = neg ? -tm_gmtoff : tm_gmtoff;
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}
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return expect;
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}
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/* Write a description of expected or actual test result to stdout. */
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static void
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describe (bool string_valid, long int tm_gmtoff)
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{
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if (string_valid)
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printf ("valid, tm.tm_gmtoff %ld", tm_gmtoff);
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else
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printf ("invalid, return value NULL");
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}
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/* Using buffer buf, run strptime. Compare results against expect,
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the expected result. Report failures and verbose results to stdout.
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Update the result counts. Return 1 if test failed, 0 if passed. */
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static int
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compare (const char *buf, long int expect, unsigned int *nresult)
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{
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struct tm tm;
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char *p;
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bool test_string_valid;
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long int test_result;
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bool fail;
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int result;
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p = strptime (buf, "%s %z", &tm);
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test_string_valid = p != NULL;
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test_result = test_string_valid ? tm.tm_gmtoff : LONG_MAX;
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fail = test_result != expect;
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if (fail || verbose)
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{
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bool expect_string_valid = expect != LONG_MAX;
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printf ("%s: input \"%s\", expected: ", fail ? "FAIL" : "PASS", buf);
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describe (expect_string_valid, expect);
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if (fail)
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{
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printf (", got: ");
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describe (test_string_valid, test_result);
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}
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printf ("\n");
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}
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result = fail ? 1 : 0;
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nresult[result]++;
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return result;
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}
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static int
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do_test (void)
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{
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char buf[buffer_size];
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long int expect;
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int result = 0;
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/* Number of tests run with passing (index==0) and failing (index==1)
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results. */
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unsigned int nresult[2];
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unsigned int ndigits;
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unsigned int step;
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unsigned int hhmm;
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nresult[0] = 0;
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nresult[1] = 0;
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/* Create and test input string with no sign and four digits input
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(invalid format). */
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sprintf (buf, "%s 1030", dummy_string);
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expect = LONG_MAX;
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result |= compare (buf, expect, nresult);
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/* Create and test input string with "Z" input (valid format).
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Expect tm_gmtoff of 0. */
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sprintf (buf, "%s Z", dummy_string);
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expect = 0;
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result |= compare (buf, expect, nresult);
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/* Create and test input strings with sign and digits:
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0 digits (invalid format),
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1 digit (invalid format),
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2 digits (valid format),
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3 digits (invalid format),
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4 digits (valid format if and only if minutes is in range 00-59,
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otherwise invalid).
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If format is valid, the returned tm_gmtoff is checked. */
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for (ndigits = 0, step = 10000; ndigits <= 4; ndigits++, step /= 10)
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for (hhmm = 0; hhmm <= 9999; hhmm += step)
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{
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/* Test both positive and negative signs. */
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expect = mkbuf (buf, false, false, hhmm, ndigits);
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result |= compare (buf, expect, nresult);
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expect = mkbuf (buf, true, false, hhmm, ndigits);
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result |= compare (buf, expect, nresult);
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/* Test with colon as well. */
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if (ndigits >= 3)
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{
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expect = mkbuf (buf, false, true, hhmm, ndigits);
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result |= compare (buf, expect, nresult);
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expect = mkbuf (buf, true, true, hhmm, ndigits);
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result |= compare (buf, expect, nresult);
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}
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}
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if (result > 0 || verbose)
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printf ("%s: %u input strings: %u fail, %u pass\n",
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result > 0 ? "FAIL" : "PASS",
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nresult[1] + nresult[0], nresult[1], nresult[0]);
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return result;
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}
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/* Add a "--verbose" command line option to test-skeleton.c. */
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#define OPT_VERBOSE 10000
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#define CMDLINE_OPTIONS \
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{ "verbose", no_argument, NULL, OPT_VERBOSE, },
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#define CMDLINE_PROCESS \
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case OPT_VERBOSE: \
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verbose = true; \
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break;
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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