print_binary.c

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// SPDX-License-Identifier: GPL-2.0
#include "print_binary.h"
#include <linux/log2.h>
#include "sane_ctype.h"

int binary__fprintf(unsigned char *data, size_t len,
            size_t bytes_per_line, binary__fprintf_t printer,
            void *extra, FILE *fp)
{
    size_t i, j, mask;
    int printed = 0;

    if (!printer)
        return 0;

    bytes_per_line = roundup_pow_of_two(bytes_per_line);
    mask = bytes_per_line - 1;

    printed += printer(BINARY_PRINT_DATA_BEGIN, 0, extra, fp);
    for (i = 0; i < len; i++) {
        if ((i & mask) == 0) {
            printed += printer(BINARY_PRINT_LINE_BEGIN, -1, extra, fp);
            printed += printer(BINARY_PRINT_ADDR, i, extra, fp);
        }

        printed += printer(BINARY_PRINT_NUM_DATA, data[i], extra, fp);

        if (((i & mask) == mask) || i == len - 1) {
            for (j = 0; j < mask-(i & mask); j++)
                printed += printer(BINARY_PRINT_NUM_PAD, -1, extra, fp);

            printer(BINARY_PRINT_SEP, i, extra, fp);
            for (j = i & ~mask; j <= i; j++)
                printed += printer(BINARY_PRINT_CHAR_DATA, data[j], extra, fp);
            for (j = 0; j < mask-(i & mask); j++)
                printed += printer(BINARY_PRINT_CHAR_PAD, i, extra, fp);
            printed += printer(BINARY_PRINT_LINE_END, -1, extra, fp);
        }
    }
    printed += printer(BINARY_PRINT_DATA_END, -1, extra, fp);
    return printed;
}

int is_printable_array(char *p, unsigned int len)
{
    unsigned int i;

    if (!p || !len || p[len - 1] != 0)
        return 0;

    len--;

    for (i = 0; i < len; i++) {
        if (!isprint(p[i]) && !isspace(p[i]))
            return 0;
    }
    return 1;
}