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[settings] Add fetch_string_setting_copy()

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This commit is contained in:
Michael Brown 2009-01-27 19:13:47 +00:00
parent 1284773363
commit a128973ecb
2 changed files with 35 additions and 0 deletions
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32
src/core/settings.c
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@ -389,6 +389,38 @@ int fetch_string_setting ( struct settings *settings, struct setting *setting,
( ( len > 0 ) ? ( len - 1 ) : 0 ) );
}
/**
* Fetch value of string setting
*
* @v settings Settings block, or NULL to search all blocks
* @v setting Setting to fetch
* @v data Buffer to allocate and fill with setting string data
* @ret len Length of string setting, or negative error
*
* The resulting string is guaranteed to be correctly NUL-terminated.
* The returned length will be the length of the underlying setting
* data. The caller is responsible for eventually freeing the
* allocated buffer.
*/
int fetch_string_setting_copy ( struct settings *settings,
struct setting *setting,
char **data ) {
int len;
int check_len;
len = fetch_setting_len ( settings, setting );
if ( len < 0 )
return len;
*data = malloc ( len + 1 );
if ( ! *data )
return -ENOMEM;
fetch_string_setting ( settings, setting, *data, ( len + 1 ) );
assert ( check_len == len );
return len;
}
/**
* Fetch value of IPv4 address setting
*

3
src/include/gpxe/settings.h
View File

@ -175,6 +175,9 @@ extern int fetch_setting_len ( struct settings *settings,
extern int fetch_string_setting ( struct settings *settings,
struct setting *setting,
char *data, size_t len );
extern int fetch_string_setting_copy ( struct settings *settings,
struct setting *setting,
char **data );
extern int fetch_ipv4_setting ( struct settings *settings,
struct setting *setting, struct in_addr *inp );
extern int fetch_int_setting ( struct settings *settings,