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[settings] Explicitly separate the concept of a completed fetched setting

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The fetch_setting() family of functions may currently modify the
definition of the specified setting (e.g. to add missing type
information).  Clean up this interface by requiring callers to provide
an explicit buffer to contain the completed definition of the fetched
setting, if required.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2013-12-03 16:48:56 +00:00
parent a2638a8edd
commit 22001cb206
37 changed files with 620 additions and 573 deletions
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8
src/interface/efi/efi_snp_hii.c
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@@ -276,7 +276,9 @@ static int efi_snp_hii_fetch ( struct efi_snp_device *snpdev,
const char *key, const char *value,
wchar_t **results, int *have_setting ) {
struct settings *settings = efi_snp_hii_settings ( snpdev );
struct settings *origin;
struct setting *setting;
struct setting fetched;
int len;
char *buf;
char *encoded;
@@ -311,7 +313,8 @@ static int efi_snp_hii_fetch ( struct efi_snp_device *snpdev,
if ( setting_exists ( settings, setting ) ) {
/* Calculate formatted length */
len = fetchf_setting ( settings, setting, NULL, 0 );
len = fetchf_setting ( settings, setting, &origin, &fetched,
NULL, 0 );
if ( len < 0 ) {
rc = len;
DBGC ( snpdev, "SNPDEV %p could not fetch %s: %s\n",
@@ -328,7 +331,8 @@ static int efi_snp_hii_fetch ( struct efi_snp_device *snpdev,
encoded = ( buf + len + 1 /* NUL */ );
/* Format value */
fetchf_setting ( settings, setting, buf, ( len + 1 /* NUL */ ));
fetchf_setting ( origin, &fetched, NULL, NULL, buf,
( len + 1 /* NUL */ ) );
for ( i = 0 ; i < len ; i++ ) {
sprintf ( ( encoded + ( 4 * i ) ), "%04x",
*( ( uint8_t * ) buf + i ) );