diff options
author | 2016-05-18 13:18:31 +0300 | |
---|---|---|
committer | 2016-05-18 13:42:15 +0300 | |
commit | 437fd90c0250dee670290f9b714253671a990160 (patch) | |
tree | b871786c360704244a07411c69fb58da9ead4a06 /qemu/roms/ipxe/src/core/base64.c | |
parent | 5bbd6fe9b8bab2a93e548c5a53b032d1939eec05 (diff) |
These changes are the raw update to qemu-2.6.
Collission happened in the following patches:
migration: do cleanup operation after completion(738df5b9)
Bug fix.(1750c932f86)
kvmclock: add a new function to update env->tsc.(b52baab2)
The code provided by the patches was already in the upstreamed
version.
Change-Id: I3cc11841a6a76ae20887b2e245710199e1ea7f9a
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'qemu/roms/ipxe/src/core/base64.c')
-rw-r--r-- | qemu/roms/ipxe/src/core/base64.c | 106 |
1 files changed, 51 insertions, 55 deletions
diff --git a/qemu/roms/ipxe/src/core/base64.c b/qemu/roms/ipxe/src/core/base64.c index bdaf70957..e452f7d41 100644 --- a/qemu/roms/ipxe/src/core/base64.c +++ b/qemu/roms/ipxe/src/core/base64.c @@ -15,9 +15,13 @@ * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301, USA. + * + * You can also choose to distribute this program under the terms of + * the Unmodified Binary Distribution Licence (as given in the file + * COPYING.UBDL), provided that you have satisfied its requirements. */ -FILE_LICENCE ( GPL2_OR_LATER ); +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); #include <stdint.h> #include <string.h> @@ -39,80 +43,73 @@ static const char base64[64] = * Base64-encode data * * @v raw Raw data - * @v len Length of raw data - * @v encoded Buffer for encoded string - * - * The buffer must be the correct length for the encoded string. Use - * something like - * - * char buf[ base64_encoded_len ( len ) + 1 ]; - * - * (the +1 is for the terminating NUL) to provide a buffer of the - * correct size. + * @v raw_len Length of raw data + * @v data Buffer + * @v len Length of buffer + * @ret len Encoded length */ -void base64_encode ( const uint8_t *raw, size_t len, char *encoded ) { +size_t base64_encode ( const void *raw, size_t raw_len, char *data, + size_t len ) { const uint8_t *raw_bytes = ( ( const uint8_t * ) raw ); - uint8_t *encoded_bytes = ( ( uint8_t * ) encoded ); - size_t raw_bit_len = ( 8 * len ); + size_t raw_bit_len = ( 8 * raw_len ); + size_t used = 0; unsigned int bit; unsigned int byte; unsigned int shift; unsigned int tmp; - for ( bit = 0 ; bit < raw_bit_len ; bit += 6 ) { + for ( bit = 0 ; bit < raw_bit_len ; bit += 6, used++ ) { byte = ( bit / 8 ); shift = ( bit % 8 ); tmp = ( raw_bytes[byte] << shift ); - if ( ( byte + 1 ) < len ) + if ( ( byte + 1 ) < raw_len ) tmp |= ( raw_bytes[ byte + 1 ] >> ( 8 - shift ) ); tmp = ( ( tmp >> 2 ) & 0x3f ); - *(encoded_bytes++) = base64[tmp]; + if ( used < len ) + data[used] = base64[tmp]; + } + for ( ; ( bit % 8 ) != 0 ; bit += 6, used++ ) { + if ( used < len ) + data[used] = '='; } - for ( ; ( bit % 8 ) != 0 ; bit += 6 ) - *(encoded_bytes++) = '='; - *(encoded_bytes++) = '\0'; + if ( used < len ) + data[used] = '\0'; + if ( len ) + data[ len - 1 ] = '\0'; /* Ensure terminator exists */ - DBG ( "Base64-encoded to \"%s\":\n", encoded ); - DBG_HDA ( 0, raw, len ); - assert ( strlen ( encoded ) == base64_encoded_len ( len ) ); + return used; } /** * Base64-decode string * * @v encoded Encoded string - * @v raw Raw data - * @ret len Length of raw data, or negative error - * - * The buffer must be large enough to contain the decoded data. Use - * something like - * - * char buf[ base64_decoded_max_len ( encoded ) ]; - * - * to provide a buffer of the correct size. + * @v data Buffer + * @v len Length of buffer + * @ret len Length of data, or negative error */ -int base64_decode ( const char *encoded, uint8_t *raw ) { - const uint8_t *encoded_bytes = ( ( const uint8_t * ) encoded ); - uint8_t *raw_bytes = ( ( uint8_t * ) raw ); - uint8_t encoded_byte; +int base64_decode ( const char *encoded, void *data, size_t len ) { + const char *in = encoded; + uint8_t *out = data; + uint8_t in_char; char *match; - int decoded; + int in_bits; unsigned int bit = 0; unsigned int pad_count = 0; - size_t len; + size_t offset; - /* Zero the raw data */ - memset ( raw, 0, base64_decoded_max_len ( encoded ) ); + /* Zero the output buffer */ + memset ( data, 0, len ); /* Decode string */ - while ( ( encoded_byte = *(encoded_bytes++) ) ) { + while ( ( in_char = *(in++) ) ) { /* Ignore whitespace characters */ - if ( isspace ( encoded_byte ) ) + if ( isspace ( in_char ) ) continue; /* Process pad characters */ - if ( encoded_byte == '=' ) { + if ( in_char == '=' ) { if ( pad_count >= 2 ) { DBG ( "Base64-encoded string \"%s\" has too " "many pad characters\n", encoded ); @@ -129,18 +126,22 @@ int base64_decode ( const char *encoded, uint8_t *raw ) { } /* Process normal characters */ - match = strchr ( base64, encoded_byte ); + match = strchr ( base64, in_char ); if ( ! match ) { DBG ( "Base64-encoded string \"%s\" contains invalid " - "character '%c'\n", encoded, encoded_byte ); + "character '%c'\n", encoded, in_char ); return -EINVAL; } - decoded = ( match - base64 ); + in_bits = ( match - base64 ); /* Add to raw data */ - decoded <<= 2; - raw_bytes[ bit / 8 ] |= ( decoded >> ( bit % 8 ) ); - raw_bytes[ bit / 8 + 1 ] |= ( decoded << ( 8 - ( bit % 8 ) ) ); + in_bits <<= 2; + offset = ( bit / 8 ); + if ( offset < len ) + out[offset] |= ( in_bits >> ( bit % 8 ) ); + offset++; + if ( offset < len ) + out[offset] |= ( in_bits << ( 8 - ( bit % 8 ) ) ); bit += 6; } @@ -150,12 +151,7 @@ int base64_decode ( const char *encoded, uint8_t *raw ) { "%d\n", encoded, bit ); return -EINVAL; } - len = ( bit / 8 ); - - DBG ( "Base64-decoded \"%s\" to:\n", encoded ); - DBG_HDA ( 0, raw, len ); - assert ( len <= base64_decoded_max_len ( encoded ) ); /* Return length in bytes */ - return ( len ); + return ( bit / 8 ); } |