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#include "util.h"
guint64 util_read_address(char *key, guint64 default_value) {
char *value_str = getenv(key);
char *end_ptr;
if (value_str == NULL) { return default_value; }
if (!g_str_has_prefix(value_str, "0x")) {
FATAL("Invalid address should have 0x prefix: %s=%s\n", key, value_str);
}
char *value_str2 = &value_str[2];
for (char *c = value_str2; *c != '\0'; c++) {
if (!g_ascii_isxdigit(*c)) {
FATAL("Invalid address not formed of hex digits: %s=%s ('%c')\n", key,
value_str, *c);
}
}
errno = 0;
guint64 value = g_ascii_strtoull(value_str2, &end_ptr, 16);
if (errno != 0) {
FATAL("Error (%d) during conversion: %s", errno, value_str);
}
if (value == 0 && end_ptr == value_str2) {
FATAL("Invalid address failed hex conversion: %s=%s\n", key, value_str2);
}
return value;
}
guint64 util_read_num(char *key, guint64 default_value) {
char *value_str = getenv(key);
char *end_ptr;
if (value_str == NULL) { return default_value; }
for (char *c = value_str; *c != '\0'; c++) {
if (!g_ascii_isdigit(*c)) {
FATAL("Invalid address not formed of decimal digits: %s=%s\n", key,
value_str);
}
}
errno = 0;
guint64 value = g_ascii_strtoull(value_str, NULL, 10);
if (errno != 0) {
FATAL("Error (%d) during conversion: %s", errno, value_str);
}
if (value == 0 && end_ptr == value_str) {
FATAL("Invalid address failed numeric conversion: %s=%s\n", key, value_str);
}
return value;
}
gboolean util_output_enabled(void) {
static gboolean initialized = FALSE;
static gboolean enabled = TRUE;
if (!initialized) {
initialized = TRUE;
if (getenv("AFL_DEBUG_CHILD") == NULL) { enabled = FALSE; }
}
return enabled;
}
gsize util_rotate(gsize val, gsize shift, gsize size) {
if (shift == 0) { return val; }
gsize result = ((val >> shift) | (val << (size - shift)));
result = result & ((1 << size) - 1);
return result;
}
gsize util_log2(gsize val) {
for (gsize i = 0; i < 64; i++) {
if (((gsize)1 << i) == val) { return i; }
}
FFATAL("Not a power of two");
}
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