elf_errorstatus elf_xen_parse_features(const char *features,
uint32_t *supported,
uint32_t *required)
{
unsigned char feature[64];
unsigned pos, len, i;
if ( features == NULL )
return 0;
for ( pos = 0; features[pos] != '\0'; pos += len )
{
elf_memset_unchecked(feature, 0, sizeof(feature));
for ( len = 0;; len++ )
{
if ( len >= sizeof(feature)-1 )
break;
if ( features[pos + len] == '\0' )
break;
if ( features[pos + len] == '|' )
{
len++;
break;
}
feature[len] = features[pos + len];
}
for ( i = 0; i < elf_xen_features; i++ )
{
if ( !elf_xen_feature_names[i] )
continue;
if ( feature[0] == '!' )
{
/* required */
if ( !strcmp(feature + 1, elf_xen_feature_names[i]) )
{
elf_xen_feature_set(i, supported);
if ( required )
elf_xen_feature_set(i, required);
break;
}
}
else
{
/* supported */
if ( !strcmp(feature, elf_xen_feature_names[i]) )
{
elf_xen_feature_set(i, supported);
break;
}
}
}
if ( i == elf_xen_features && required && feature[0] == '!' )
return -1;
}
return 0;
}
int elf_xen_parse_features(const char *features,
uint32_t *supported,
uint32_t *required)
{
char feature[64];
int pos, len, i;
if ( features == NULL )
return 0;
for ( pos = 0; features[pos] != '\0'; pos += len )
{
memset(feature, 0, sizeof(feature));
for ( len = 0;; len++ )
{
if ( len >= sizeof(feature)-1 )
break;
if ( features[pos + len] == '\0' )
break;
if ( features[pos + len] == '|' )
{
len++;
break;
}
feature[len] = features[pos + len];
}
for ( i = 0; i < elf_xen_features; i++ )
{
if ( !elf_xen_feature_names[i] )
continue;
if ( (required != NULL) && (feature[0] == '!') )
{
/* required */
if ( !strcmp(feature + 1, elf_xen_feature_names[i]) )
{
elf_xen_feature_set(i, supported);
elf_xen_feature_set(i, required);
break;
}
}
else
{
/* supported */
if ( !strcmp(feature, elf_xen_feature_names[i]) )
{
elf_xen_feature_set(i, supported);
break;
}
}
}
if ( i == elf_xen_features )
return -1;
}
return 0;
}
