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#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdint.h>
#include <stdarg.h>
#include "utils.h"
int verbosity = 0;
int
msg(int level, const char *fmt, ...)
{
int ret;
va_list ap;
if (level > verbosity)
return 0;
va_start(ap, fmt);
ret = vfprintf(stderr, fmt, ap);
va_end(ap);
return ret;
}
void *
xmalloc(size_t size)
{
void *result = malloc(size);
if (!result) {
fprintf(stderr, "Failed to malloc %zi bytes\n", size);
exit(EXIT_FAILURE);
}
return result;
}
char *
xstrdup(const char *s)
{
char *result = strdup(s);
if (!result) {
fprintf(stderr, "Failed to strdup %zi bytes\n", strlen(s));
exit(EXIT_FAILURE);
}
return result;
}
void
binary_print(const char *s, ssize_t len)
{
ssize_t i;
for (i = 0; i < len; i++) {
if (isprint(s[i]))
printf("%c", s[i]);
else
printf("0x%02X", (int)s[i]);
}
}
void
xfwrite(const void *ptr, size_t size, FILE *stream)
{
if (fwrite(ptr, size, 1, stream) != 1) {
perror("fwrite");
exit(EXIT_FAILURE);
}
}
void
write_int(uint64_t value, size_t len, FILE *to)
{
char buf[len];
int i;
for (i = 0; i < len; i++)
buf[i] = ((value >> (8 * i)) & 0xff);
xfwrite(buf, len, to);
}
void
write_binary_string(const char *string, size_t len, FILE *to)
{
xfwrite(string, len, to);
}
void
write_string(const char *string, FILE *to)
{
xfwrite(string, strlen(string) + 1, to);
}
uint64_t
read_int(char **from, size_t len, const char *max)
{
uint64_t result = 0;
int i;
if (*from + len > max) {
fprintf(stderr, "Attempt to read beyond end of file, corrupt file?\n");
exit(EXIT_FAILURE);
}
for (i = 0; i < len; i++)
result += (((*from)[i] & 0xff) << (8 * i));
*from += len;
return result;
}
char *
read_binary_string(char **from, size_t len, const char *max)
{
char *result;
if (*from + len > max) {
fprintf(stderr, "Attempt to read beyond end of file, corrupt file?\n");
exit(EXIT_FAILURE);
}
result = xmalloc(len);
strncpy(result, *from, len);
*from += len;
return result;
}
char *
read_string(char **from, const char *max)
{
return read_binary_string(from, strlen(*from) + 1, max);
}
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