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pack.c (encodes): name a magic number

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47064 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2014-08-04 13:27:01 +00:00
parent 43b0066d2b
commit de79761ef6
1 changed files with 6 additions and 6 deletions
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12
pack.c
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@ -945,10 +945,10 @@ static const char b64_table[] =
static void
encodes(VALUE str, const char *s, long len, int type, int tail_lf)
{
enum {buff_size = 4096, encoded_unit = 4};
enum {buff_size = 4096, encoded_unit = 4, input_unit = 3};
char buff[buff_size + 1]; /* +1 for tail_lf */
long i = 0;
const char *trans = type == 'u' ? uu_table : b64_table;
const char *const trans = type == 'u' ? uu_table : b64_table;
char padding;
if (type == 'u') {
@ -958,14 +958,14 @@ encodes(VALUE str, const char *s, long len, int type, int tail_lf)
else {
padding = '=';
}
while (len >= 3) {
while (len >= 3 && buff_size-i >= encoded_unit) {
while (len >= input_unit) {
while (len >= input_unit && buff_size-i >= encoded_unit) {
buff[i++] = trans[077 & (*s >> 2)];
buff[i++] = trans[077 & (((*s << 4) & 060) | ((s[1] >> 4) & 017))];
buff[i++] = trans[077 & (((s[1] << 2) & 074) | ((s[2] >> 6) & 03))];
buff[i++] = trans[077 & s[2]];
s += 3;
len -= 3;
s += input_unit;
len -= input_unit;
}
if (buff_size-i < encoded_unit) {
rb_str_buf_cat(str, buff, i);