Import official C23 code examples for Modern C (Jens Gustedt, 2024)HEADupstream-importmain

- Add official C source files, Makefile, c23-fallback.h, and LICENSE
- Update README.md with study mirror notice

1 files changed, 41 insertions, 0 deletions

diff --git a/rationals.h b/rationals.h
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+#ifndef RATIONALS_H
+# define RATIONALS_H 1
+# include <stdbool.h>
+# include "euclid.h"
+
+typedef struct rat rat;
+
+struct rat {
+  bool sign;
+  size_t num;
+  size_t denom;
+};
+
+/* Functions that return a value of type rat. */
+rat rat_get(signed sign, size_t num, size_t denom) [[__unsequenced__]];
+rat rat_get_normal(rat x) [[__unsequenced__]];
+rat rat_get_extended(rat x, size_t f) [[__unsequenced__]];
+rat rat_get_prod(rat x, rat y) [[__unsequenced__]];
+rat rat_get_sum(rat x, rat y) [[__unsequenced__]];
+
+
+/* Functions that operate on pointers to rat. */
+void rat_destroy(rat* rp) [[__unsequenced__]];
+rat* rat_init(rat* rp,
+              signed sign,
+              size_t num, size_t denom) [[__unsequenced__]];
+rat* rat_normalize(rat* rp) [[__unsequenced__]];
+rat* rat_extend(rat* rp, size_t f) [[__unsequenced__]];
+rat* rat_sumup(rat* rp, rat y) [[__unsequenced__]];
+rat* rat_rma(rat* rp, rat x, rat y) [[__unsequenced__]];
+
+/* Functions that are implemented as exercises. */
+/** @brief Print @a x into @a tmp and return tmp. **/
+char const* rat_print(size_t len, char tmp[len], rat const* x);
+/** @brief Print @a x normalize and print. **/
+char const* rat_normalize_print(size_t len, char tmp[len],
+                                rat const* x);
+rat* rat_dotproduct(rat rp[static 1], size_t n,
+                    rat const A[n], rat const B[n]);
+
+#endif