diff options
| -rw-r--r-- | generic/tclBinary.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/generic/tclBinary.c b/generic/tclBinary.c index b29f1d8..5c33308 100644 --- a/generic/tclBinary.c +++ b/generic/tclBinary.c @@ -2663,7 +2663,7 @@ BinaryDecode64( unsigned char *cursor = NULL; int strict = 0; int i, index, size, cut = 0, count = 0; - enum {OPT_STRICT }; + enum { OPT_STRICT }; static const char *const optStrings[] = { "-strict", NULL }; if (objc < 2 || objc > 3) { @@ -2698,12 +2698,14 @@ BinaryDecode64( * length. The final block can be shorter by one or two bytes, denoted * by the input ending with one or two ='s, respectively. */ + for (i = 0; i < 4; i++) { /* * Get the next input character. At end of input, pad with at most * two ='s. If more than two ='s would be needed, instead discard * the block read thus far. */ + if (data < dataend) { c = *data++; } else if (i > 1) { @@ -2719,6 +2721,7 @@ BinaryDecode64( * final block of input. Unless strict mode is enabled, skip any * input whitespace characters. */ + if (cut) { if (c == '=' && i > 1) { value <<= 6; @@ -2756,14 +2759,14 @@ BinaryDecode64( * but there are still more input characters, confirm that strict mode * is off and all subsequent characters are whitespace. */ + if (cut && data < dataend) { if (strict) { goto bad64; - } else { - for (; data < dataend; data++) { - if (!isspace(*data)) { - goto bad64; - } + } + for (; data < dataend; data++) { + if (!isspace(*data)) { + goto bad64; } } } |