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98 lines
2.1 KiB
98 lines
2.1 KiB
#define _POSIX_C_SOURCE 200809l
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#include <sys/mman.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <errno.h>
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#include <err.h>
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#include "util.h"
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const char *bit_rep[16] = {
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[ 0] = "0000", [ 1] = "0001", [ 2] = "0010", [ 3] = "0011",
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[ 4] = "0100", [ 5] = "0101", [ 6] = "0110", [ 7] = "0111",
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[ 8] = "1000", [ 9] = "1001", [10] = "1010", [11] = "1011",
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[12] = "1100", [13] = "1101", [14] = "1110", [15] = "1111",
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};
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void * emalloc(unsigned long int size)
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{
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void *r = malloc(size);
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if (!r)
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err(EXIT_FAILURE, "malloc() of size %ld", size);
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return r;
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}
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void * ecalloc(unsigned long int nmemb, unsigned long int size)
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{
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void *r = calloc(nmemb, size);
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if (!r)
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err(EXIT_FAILURE, "calloc() of size %ld, nmemb %ld", size, nmemb);
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return r;
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}
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void efree(void *ptr)
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{
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if (ptr)
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free(ptr);
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}
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void map_file(const unsigned char **str, int *size, const char *path)
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{
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if (!path) {
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errno = EINVAL;
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err(EXIT_FAILURE, "NULL filename");
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}
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FILE *fp = fopen(path, "r");
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if (!fp)
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err(EXIT_FAILURE, "Cannot open file %s", path);
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*size = lseek(fileno(fp), 0, SEEK_END);
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if (*size == (off_t)-1)
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err(EXIT_FAILURE, "lseek() failed");
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*str = mmap(0, *size, PROT_READ, MAP_PRIVATE, fileno(fp), 0);
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if (*str == (void*)-1)
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err(EXIT_FAILURE, "mmap() failed");
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if (fclose(fp))
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err(EXIT_FAILURE, "Error closing file");
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}
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void dump_file(const char *path, unsigned char **buf, int *buf_len)
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{
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if (!path) {
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errno = EINVAL;
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err(EXIT_FAILURE, "NULL filename");
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}
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if (!buf) {
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errno = EINVAL;
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err(EXIT_FAILURE, "No buffer specified");
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}
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if (!buf_len) {
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errno = EINVAL;
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err(EXIT_FAILURE, "Nowhere to store buffer size");
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}
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FILE *fp = fopen(path, "r");
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if (!fp)
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err(EXIT_FAILURE, "Cannot open file %s", path);
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*buf_len = lseek(fileno(fp), 0, SEEK_END);
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if (*buf_len == (off_t)-1)
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err(EXIT_FAILURE, "lseek() failed");
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*buf = emalloc(*buf_len);
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*buf_len = fread(*buf, 1, *buf_len, fp);
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if (fclose(fp))
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err(EXIT_FAILURE, "Error closing file");
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}
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void print_byte(unsigned char byte)
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{
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printf("%s%s", bit_rep[byte >> 4], bit_rep[byte & 0x0F]);
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}
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