Cedric Roux
ea6fb5c481
Adapt calling sites too. When data comes from the user, it is good to check that what we read is correct and warn the user if it's not.
108 lines
3.8 KiB
C
108 lines
3.8 KiB
C
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include "utils.h"
|
|
|
|
void *calloc_or_fail(size_t size) {
|
|
void *ptr = calloc(1, size);
|
|
if (ptr == NULL) {
|
|
fprintf(stderr, "[UE] Failed to calloc %zu bytes", size);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
return ptr;
|
|
}
|
|
|
|
void *malloc_or_fail(size_t size) {
|
|
void *ptr = malloc(size);
|
|
if (ptr == NULL) {
|
|
fprintf(stderr, "[UE] Failed to malloc %zu bytes", size);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
return ptr;
|
|
}
|
|
|
|
/****************************************************************************
|
|
** **
|
|
** Name: hex_char_to_hex_value() **
|
|
** **
|
|
** Description: Converts an hexadecimal ASCII coded digit into its value. **
|
|
** **
|
|
** Inputs: c: A char holding the ASCII coded value **
|
|
** Others: None **
|
|
** **
|
|
** Outputs: None **
|
|
** Return: Converted value (-1 on error) **
|
|
** Others: None **
|
|
** **
|
|
***************************************************************************/
|
|
int hex_char_to_hex_value (char c)
|
|
{
|
|
if (!((c >= 'a' && c <= 'f') ||
|
|
(c >= 'A' && c <= 'F') ||
|
|
(c >= '0' && c <= '9')))
|
|
return -1;
|
|
|
|
if (c >= 'A') {
|
|
/* Remove case bit */
|
|
c &= ~('a' ^ 'A');
|
|
|
|
return (c - 'A' + 10);
|
|
} else {
|
|
return (c - '0');
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
** **
|
|
** Name: hex_string_to_hex_value() **
|
|
** **
|
|
** Description: Converts an hexadecimal ASCII coded string into its value.**
|
|
** **
|
|
** Inputs: hex_value: A pointer to the location to store the **
|
|
** conversion result **
|
|
** size: The size of hex_value in bytes **
|
|
** Others: None **
|
|
** **
|
|
** Outputs: hex_value: Converted value **
|
|
** Return: 0 on success, -1 on error **
|
|
** Others: None **
|
|
** **
|
|
***************************************************************************/
|
|
int hex_string_to_hex_value (uint8_t *hex_value, const char *hex_string, int size)
|
|
{
|
|
int i;
|
|
|
|
if (strlen(hex_string) != size*2) {
|
|
fprintf(stderr, "the string '%s' should be of length %d\n", hex_string, size*2);
|
|
return -1;
|
|
}
|
|
|
|
for (i=0; i < size; i++) {
|
|
int a = hex_char_to_hex_value(hex_string[2 * i]);
|
|
int b = hex_char_to_hex_value(hex_string[2 * i + 1]);
|
|
if (a == -1 || b == -1) goto error;
|
|
hex_value[i] = (a << 4) | b;
|
|
}
|
|
return 0;
|
|
|
|
error:
|
|
fprintf(stderr, "the string '%s' is not a valid hexadecimal string\n", hex_string);
|
|
for (i=0; i < size; i++)
|
|
hex_value[i] = 0;
|
|
return -1;
|
|
}
|
|
|
|
char *itoa(int i) {
|
|
char buffer[64];
|
|
int ret;
|
|
|
|
ret = snprintf(buffer, sizeof(buffer), "%d",i);
|
|
if ( ret <= 0 ) {
|
|
return NULL;
|
|
}
|
|
|
|
return strdup(buffer);
|
|
}
|
|
|