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Enable CRC(1) SHA1(1)-style hashes to work without error.

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This commit is contained in:
Aaron Giles 2011-02-28 08:18:35 +00:00
parent b7aa7df561
commit beb05ca537
1 changed files with 11 additions and 3 deletions
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14
src/emu/hash.c
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@ -199,12 +199,22 @@ const char *hash_base::string(astring &buffer)
bool hash_base::from_string(const char *&string, int length)
{
// reset the error and our buffer
m_parse_error = false;
memset(m_bufptr, 0, m_length);
// special case for idiom HASH(1) to map to a dummy (0) hash
if (string[0] == '1' && fromhex(string[1]) == -1)
{
string++;
return true;
}
// fail if we're too short
if (length < 2 * m_length)
return false;
// loop over bytes
m_parse_error = false;
for (int index = 0; index < m_length; index++)
{
// parse the upper digit
@ -212,7 +222,6 @@ bool hash_base::from_string(const char *&string, int length)
if (upper == -1)
{
m_parse_error = true;
memset(m_bufptr, 0, m_length);
return false;
}
@ -221,7 +230,6 @@ bool hash_base::from_string(const char *&string, int length)
if (lower == -1)
{
m_parse_error = true;
memset(m_bufptr, 0, m_length);
return false;
}