C - Matrix

/*
 * TODO: Generinc I/O
 */


#include <stdlib.h>
#include <stdio.h>

#define SUCCESS 0
#define NEWLINE puts("")

/* Error checked malloc and realloc. */
void *ec_malloc(size_t size);
void *ec_realloc(void *ptr, size_t size);

#define mm(size, type) (type *) ec_malloc(size * sizeof(type))

/* Allocate a matrix of any type. */
#define mem_matrix(matrix, rows, cols, type) ;\
    matrix = mm(rows, type*);\
    for (int i = 0; i < rows; ++i) {\
        matrix[i] = mm(cols, type);\
    }

/* Deallocate a matrix of any type. */
#define free_matrix(matrix, rows) ;\
    for (int i = 0; i < rows; ++i) {\
        free(matrix[i]);\
    }\
    free(matrix);

/* Read and print a matrix. */
void readmat(int **, unsigned int, unsigned int);
void printmat(int **, unsigned int, unsigned int);


void printmat(int **mat, unsigned int rows, unsigned int cols)
{
    NEWLINE;

    for (
        unsigned int ln_index = 0;
        ln_index < rows;
        ++ln_index
        )
    {
        for (
            unsigned int col_index = 0;
            col_index < cols;
            ++col_index
            )
        {
            printf("%d ",mat[ln_index][col_index]);
        }
        NEWLINE;
    }

    NEWLINE;
}



void readmat(int **mat, unsigned int rows, unsigned int cols)
{
    for (
        unsigned int ln_index = 0;
        ln_index < rows;
        ++ln_index
        )
    {
        for (
            unsigned int col_index = 0;
            col_index < cols;
            ++col_index
            )
        {
            scanf("%d", mat[ln_index] + col_index);
        }
    }
}




void *ec_realloc(void *ptr, size_t size)
{
    void *new_ptr;

    new_ptr = realloc(ptr, size);

    if (!new_ptr) {
        perror("[Error] realloc() returned NULL\n");
        exit(-1);
    }

    return new_ptr;
}

void *ec_malloc(size_t size)
{
    return ec_realloc(NULL, size);
}