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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /support/dktools/dk4maasz.ctr
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+%% options
+
+copyright owner = Dirk Krause
+copyright year = 2015-xxxx
+license = bsd
+
+
+%% header
+
+/** @file
+ Arithmetic operations on size_t.
+
+ CRT on Windows: Optional.
+*/
+
+#ifndef DK4CONF_H_INCLUDED
+#include "dk4conf.h"
+#endif
+
+#ifndef DK4TYPES_H_INCLUDED
+#include "dk4types.h"
+#endif
+
+#ifndef DK4ERROR_H_INCLUDED
+#include "dk4error.h"
+#endif
+
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Addition of size_t values.
+ @param a Left operand.
+ @param b Right operand.
+ @param erp Error report, may be NULL.
+ @return Result.
+*/
+size_t
+dk4ma_size_t_add(size_t a, size_t b, dk4_er_t *erp);
+
+/** Difference of size_t values.
+ @param a Left operand.
+ @param b Right operand.
+ @param erp Error report, may be NULL.
+ @return Result.
+*/
+size_t
+dk4ma_size_t_sub(size_t a, size_t b, dk4_er_t *erp);
+
+/** Multiplication of size_t values.
+ @param a Left operand.
+ @param b Right operand.
+ @param erp Error report, may be NULL.
+ @return Result.
+*/
+size_t
+dk4ma_size_t_mul(size_t a, size_t b, dk4_er_t *erp);
+
+#ifdef __cplusplus
+}
+#endif
+
+%% module
+
+#include "dk4conf.h"
+#include "dk4types.h"
+
+#if DK4_HAVE_LIMITS_H
+#ifndef LIMITS_H_INCLUDED
+#include <limits.h>
+#define LIMITS_H_INCLUDED 1
+#endif
+#endif
+#if DK4_HAVE_STDINT_H
+#ifndef STDINT_H_INCLUDED
+#if defined(__cplusplus) && (!defined(__STDC_LIMIT_MACROS))
+#define __STDC_LIMIT_MACROS 1
+#endif
+#if defined(__cplusplus) && (!defined(__STDC_CONSTANT_MACROS))
+#define __STDC_CONSTANT_MACROS 1
+#endif
+#include <stdint.h>
+#define STDINT_H_INCLUDED 1
+#endif
+#endif
+
+#include "dk4error.h"
+#include "dk4maasz.h"
+#include "dk4error.h"
+#include "dk4numco.h"
+
+
+
+size_t
+dk4ma_size_t_add(size_t a, size_t b, dk4_er_t *erp)
+{
+ if ((SIZE_MAX - b) < a) {
+ dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
+ }
+ return (a + b);
+}
+
+
+
+size_t
+dk4ma_size_t_sub(size_t a, size_t b, dk4_er_t *erp)
+{
+ if (b > a) {
+ dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
+ }
+ return (a - b);
+}
+
+
+
+size_t
+dk4ma_size_t_mul(size_t a, size_t b, dk4_er_t *erp)
+{
+ if ((0 < a) && (0 < b)) {
+ if ((SIZE_MAX / a) < b) {
+ dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
+ }
+ }
+ return (a * b);
+}
+