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| #include <stdio.h>
#include <stdlib.h>
#include "mat.h"
struct Mat_
{
double *data;
size_t n; /* -tc- number of lines*/
size_t m; /* -tc- number of columns */
};
int mat_new(Mat_s **p_self, size_t n, size_t m)
{
int err = MAT_OK;
if (p_self != NULL && n > 0 && m > 0)
{
Mat_s *p = NULL;
p = malloc(sizeof *p);
if (p != NULL)
{
/* -tc- initializes all fields to zero */
static Mat_s const tmp = {0};
*p = tmp;
p->data = malloc(n * m * sizeof *p->data);
if (p->data != NULL)
{
size_t i;
/* -tc- initialization of the array */
for (i = 0; i < n * m; i++)
{
p->data[i] = 0.0;
}
p->n = n;
p->m = m;
*p_self = p;
}
else
{
/* -tc- Error: allocation failed */
err = MAT_ALLOCATION_ERR;
/* -tc- clean up */
free(p), p = NULL;
}
}
else
{
/* -tc- Error: allocation failed */
err = MAT_ALLOCATION_ERR;
}
}
else
{
/* -tc- Error: bad argument */
err = MAT_ARGUMENT_ERR;
}
return err;
}
int mat_get(Mat_s *self, size_t i, size_t j, double *value_out)
{
int err = MAT_OK;
if (self != NULL && value_out != NULL)
{
if (i < self->n && j < self->m)
{
*value_out = self->data[i * self->m + j];
}
else
{
/* -tc- Error: out of bounds access */
err = MAT_OUT_OF_BOUNDS_ERR;
}
}
else
{
/* -tc- Error: bad argument */
err = MAT_ARGUMENT_ERR;
}
return err;
}
int mat_set(Mat_s *self, size_t i, size_t j, double value)
{
int err = MAT_OK;
if (self != NULL)
{
if (i < self->n && j < self->m)
{
self->data[i * self->m + j] = value;
}
else
{
/* -tc- Error: out of bounds access */
err = MAT_OUT_OF_BOUNDS_ERR;
}
}
else
{
/* -tc- Error: bad argument */
err = MAT_ARGUMENT_ERR;
}
return err;
}
int mat_display(Mat_s *self)
{
int err = MAT_OK;
if (self != NULL)
{
size_t i, j;
for (i = 0; i < self->n; i++)
{
for (j = 0; j < self->m; j++)
{
printf("%6.2f ", self->data[i * self->m + j]);
}
printf("\n");
}
}
return err;
}
int mat_delete(Mat_s **p_self)
{
int err = MAT_OK;
if (p_self != NULL && *p_self != NULL)
{
free((*p_self)->data);
free(*p_self), *p_self = NULL;
}
return err;
} |
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