Mercurial > cpython-lru_cache-weakref
diff Python/compile.c @ 6501:9ef9cadd978c legacy-trunk
Don't use sscanf(s, "%x", &c) to parse \xX... escapes; hardcode it.
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Mon, 20 Oct 1997 23:24:07 +0000 |
| parents | c9b139b9c5ff |
| children | ad114620f8c2 |
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--- a/Python/compile.c Mon Oct 20 23:22:07 1997 +0000 +++ b/Python/compile.c Mon Oct 20 23:24:07 1997 +0000 @@ -36,7 +36,6 @@ XXX (it's currently the first item of the co_const tuple) XXX Generate simple jump for break/return outside 'try...finally' XXX Allow 'continue' inside try-finally - XXX New 1-byte opcode for loading None XXX New opcode for loading the initial index for a for loop XXX other JAR tricks? */ @@ -922,11 +921,19 @@ break; case 'x': if (isxdigit(Py_CHARMASK(*s))) { - sscanf(s, "%x", &c); - *p++ = c; + unsigned int x = 0; do { + c = Py_CHARMASK(*s); s++; + x = (x<<4) & ~0xF; + if (isdigit(c)) + x += c - '0'; + else if (islower(c)) + x += 10 + c - 'a'; + else + x += 10 + c - 'A'; } while (isxdigit(Py_CHARMASK(*s))); + *p++ = x; break; } /* FALLTHROUGH */