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+/*
+ * Basic utility routines for the TAP protocol.
+ *
+ * This file is part of C TAP Harness. The current version plus supporting
+ * documentation is at <https://www.eyrie.org/~eagle/software/c-tap-harness/>.
+ *
+ * Written by Russ Allbery <eagle@eyrie.org>
+ * Copyright 2009-2019 Russ Allbery <eagle@eyrie.org>
+ * Copyright 2001-2002, 2004-2008, 2011-2012, 2014
+ * The Board of Trustees of the Leland Stanford Junior University
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#ifndef TAP_BASIC_H
+#define TAP_BASIC_H 1
+
+#include <stdarg.h> /* va_list */
+#include <stddef.h> /* size_t */
+#include <tests/tap/macros.h>
+
+/*
+ * Used for iterating through arrays. ARRAY_SIZE returns the number of
+ * elements in the array (useful for a < upper bound in a for loop) and
+ * ARRAY_END returns a pointer to the element past the end (ISO C99 makes it
+ * legal to refer to such a pointer as long as it's never dereferenced).
+ */
+#define ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0]))
+#define ARRAY_END(array) (&(array)[ARRAY_SIZE(array)])
+
+BEGIN_DECLS
+
+/*
+ * The test count. Always contains the number that will be used for the next
+ * test status.
+ */
+extern unsigned long testnum;
+
+/* Print out the number of tests and set standard output to line buffered. */
+void plan(unsigned long count);
+
+/*
+ * Prepare for lazy planning, in which the plan will be printed automatically
+ * at the end of the test program.
+ */
+void plan_lazy(void);
+
+/* Skip the entire test suite. Call instead of plan. */
+void skip_all(const char *format, ...)
+ __attribute__((__noreturn__, __format__(printf, 1, 2)));
+
+/*
+ * Basic reporting functions. The okv() function is the same as ok() but
+ * takes the test description as a va_list to make it easier to reuse the
+ * reporting infrastructure when writing new tests. ok() and okv() return the
+ * value of the success argument.
+ */
+int ok(int success, const char *format, ...)
+ __attribute__((__format__(printf, 2, 3)));
+int okv(int success, const char *format, va_list args)
+ __attribute__((__format__(printf, 2, 0)));
+void skip(const char *reason, ...) __attribute__((__format__(printf, 1, 2)));
+
+/*
+ * Report the same status on, or skip, the next count tests. ok_block()
+ * returns the value of the success argument.
+ */
+int ok_block(unsigned long count, int success, const char *format, ...)
+ __attribute__((__format__(printf, 3, 4)));
+void skip_block(unsigned long count, const char *reason, ...)
+ __attribute__((__format__(printf, 2, 3)));
+
+/*
+ * Compare two values. Returns true if the test passes and false if it fails.
+ * is_bool takes an int since the bool type isn't fully portable yet, but
+ * interprets both arguments for their truth value, not for their numeric
+ * value.
+ */
+int is_bool(int, int, const char *format, ...)
+ __attribute__((__format__(printf, 3, 4)));
+int is_int(long, long, const char *format, ...)
+ __attribute__((__format__(printf, 3, 4)));
+int is_string(const char *, const char *, const char *format, ...)
+ __attribute__((__format__(printf, 3, 4)));
+int is_hex(unsigned long, unsigned long, const char *format, ...)
+ __attribute__((__format__(printf, 3, 4)));
+int is_blob(const void *, const void *, size_t, const char *format, ...)
+ __attribute__((__format__(printf, 4, 5)));
+
+/* Bail out with an error. sysbail appends strerror(errno). */
+void bail(const char *format, ...)
+ __attribute__((__noreturn__, __nonnull__, __format__(printf, 1, 2)));
+void sysbail(const char *format, ...)
+ __attribute__((__noreturn__, __nonnull__, __format__(printf, 1, 2)));
+
+/* Report a diagnostic to stderr prefixed with #. */
+int diag(const char *format, ...)
+ __attribute__((__nonnull__, __format__(printf, 1, 2)));
+int sysdiag(const char *format, ...)
+ __attribute__((__nonnull__, __format__(printf, 1, 2)));
+
+/*
+ * Register or unregister a file that contains supplementary diagnostics.
+ * Before any other output, all registered files will be read, line by line,
+ * and each line will be reported as a diagnostic as if it were passed to
+ * diag(). Nul characters are not supported in these files and will result in
+ * truncated output.
+ */
+void diag_file_add(const char *file) __attribute__((__nonnull__));
+void diag_file_remove(const char *file) __attribute__((__nonnull__));
+
+/* Allocate memory, reporting a fatal error with bail on failure. */
+void *bcalloc(size_t, size_t)
+ __attribute__((__alloc_size__(1, 2), __malloc__, __warn_unused_result__));
+void *bmalloc(size_t)
+ __attribute__((__alloc_size__(1), __malloc__, __warn_unused_result__));
+void *breallocarray(void *, size_t, size_t)
+ __attribute__((__alloc_size__(2, 3), __malloc__, __warn_unused_result__));
+void *brealloc(void *, size_t)
+ __attribute__((__alloc_size__(2), __malloc__, __warn_unused_result__));
+char *bstrdup(const char *)
+ __attribute__((__malloc__, __nonnull__, __warn_unused_result__));
+char *bstrndup(const char *, size_t)
+ __attribute__((__malloc__, __nonnull__, __warn_unused_result__));
+
+/*
+ * Macros that cast the return value from b* memory functions, making them
+ * usable in C++ code and providing some additional type safety.
+ */
+#define bcalloc_type(n, type) ((type *) bcalloc((n), sizeof(type)))
+#define breallocarray_type(p, n, type) \
+ ((type *) breallocarray((p), (n), sizeof(type)))
+
+/*
+ * Find a test file under C_TAP_BUILD or C_TAP_SOURCE, returning the full
+ * path. The returned path should be freed with test_file_path_free().
+ */
+char *test_file_path(const char *file)
+ __attribute__((__malloc__, __nonnull__, __warn_unused_result__));
+void test_file_path_free(char *path);
+
+/*
+ * Create a temporary directory relative to C_TAP_BUILD and return the path.
+ * The returned path should be freed with test_tmpdir_free().
+ */
+char *test_tmpdir(void) __attribute__((__malloc__, __warn_unused_result__));
+void test_tmpdir_free(char *path);
+
+/*
+ * Register a cleanup function that is called when testing ends. All such
+ * registered functions will be run during atexit handling (and are therefore
+ * subject to all the same constraints and caveats as atexit functions).
+ *
+ * The function must return void and will be passed two arguments: an int that
+ * will be true if the test completed successfully and false otherwise, and an
+ * int that will be true if the cleanup function is run in the primary process
+ * (the one that called plan or plan_lazy) and false otherwise. If
+ * test_cleanup_register_with_data is used instead, a generic pointer can be
+ * provided and will be passed to the cleanup function as a third argument.
+ *
+ * test_cleanup_register_with_data is the better API and should have been the
+ * only API. test_cleanup_register was an API error preserved for backward
+ * cmpatibility.
+ */
+typedef void (*test_cleanup_func)(int, int);
+typedef void (*test_cleanup_func_with_data)(int, int, void *);
+
+void test_cleanup_register(test_cleanup_func) __attribute__((__nonnull__));
+void test_cleanup_register_with_data(test_cleanup_func_with_data, void *)
+ __attribute__((__nonnull__));
+
+END_DECLS
+
+#endif /* TAP_BASIC_H */