%% options copyright owner = Dirk Krause copyright year = 2015-xxxx SPDX-License-Identifier: BSD-3-Clause %% header /** @file Arithmetic operations on size_t. CRT on Windows: Optional. */ #ifndef DK4CONF_H_INCLUDED #if DK4_BUILDING_DKTOOLS4 #include "dk4conf.h" #else #include #endif #endif #ifndef DK4TYPES_H_INCLUDED #if DK4_BUILDING_DKTOOLS4 #include "dk4types.h" #else #include #endif #endif #ifndef DK4ERROR_H_INCLUDED #if DK4_BUILDING_DKTOOLS4 #include "dk4error.h" #else #include #endif #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); /** Convert dk4_um_t value to size_t. @param u Value to convert. @param erp Error report, may be NULL. @return Conversion result. Error codes: DK4_E_MATH_OVERFLOW. */ size_t dk4ma_size_t_from(dk4_um_t u, dk4_er_t *erp); /** Convert double to signed char. @param d Value to convert. @param erp Error report, may be NULL. @return Conversion result. Error codes: DK4_E_OVERFLOW. */ size_t dk4ma_size_t_from_double(double d, dk4_er_t *erp); #ifdef __cplusplus } #endif %% module #include "dk4conf.h" #include "dk4types.h" #if DK4_HAVE_LIMITS_H #ifndef LIMITS_H_INCLUDED #include #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 #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); } size_t dk4ma_size_t_from(dk4_um_t u, dk4_er_t *erp) { if ((dk4_um_t)(SIZE_MAX) < u) { dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW); } return ((size_t)u); } size_t dk4ma_size_t_from_double(double d, dk4_er_t *erp) { size_t back = 0; if ((double)(SIZE_MAX) < d) { dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW); back = SIZE_MAX; } else { if (0.0 > d) { dk4error_set_simple_error_code(erp,DK4_E_MATH_OVERFLOW); } else { back = (size_t)d; } } return back; }