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gh-89653: Add assertions to unicodeobject.h functions (#92692)

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Victor Stinner 2022-05-12 00:12:42 +02:00 • committed by GitHub
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commit d492f0ab2a
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1 changed files with 8 additions and 2 deletions
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10
Include/cpython/unicodeobject.h
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@ -28,16 +28,22 @@ static inline int Py_UNICODE_IS_LOW_SURROGATE(Py_UCS4 ch) {
// Join two surrogate characters and return a single Py_UCS4 value.
static inline Py_UCS4 Py_UNICODE_JOIN_SURROGATES(Py_UCS4 high, Py_UCS4 low) {
assert(Py_UNICODE_IS_HIGH_SURROGATE(high));
assert(Py_UNICODE_IS_LOW_SURROGATE(low));
return 0x10000 + (((high & 0x03FF) << 10) | (low & 0x03FF));
}
// High surrogate = top 10 bits added to D800
// High surrogate = top 10 bits added to 0xD800.
// The character must be in the range [U+10000; U+10ffff].
static inline Py_UCS4 Py_UNICODE_HIGH_SURROGATE(Py_UCS4 ch) {
assert(0x10000 <= ch && ch <= 0x10ffff);
return (0xD800 - (0x10000 >> 10) + (ch >> 10));
}
// Low surrogate = bottom 10 bits added to DC00
// Low surrogate = bottom 10 bits added to 0xDC00.
// The character must be in the range [U+10000; U+10ffff].
static inline Py_UCS4 Py_UNICODE_LOW_SURROGATE(Py_UCS4 ch) {
assert(0x10000 <= ch && ch <= 0x10ffff);
return (0xDC00 + (ch & 0x3FF));
}