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Support string putc, getc, substr, bug1606.

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Signed-off-by: Wilson Snyder <[email protected]>
This commit is contained in:
Yutetsu TAKATSUKASA
2019-12-15 08:09:52 -05:00
committed by Wilson Snyder
parent 460e0541f3
commit 8cdc0c4e00
11 changed files with 268 additions and 25 deletions
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src/V3Number.cpp
+38
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@@ -1262,6 +1262,44 @@ V3Number& V3Number::opAtoN(const V3Number& lhs, int base) {
return setLongS(static_cast<vlsint32_t>(v));
}
V3Number& V3Number::opPutcN(const V3Number& lhs, const V3Number& rhs, const V3Number& ths) {
NUM_ASSERT_OP_ARGS3(lhs, rhs, ths);
NUM_ASSERT_STRING_ARGS1(lhs);
string lstring = lhs.toString();
const vlsint32_t i = rhs.toSInt();
const vlsint32_t c = ths.toSInt() & 0xFF;
// 6.16.2:str.putc(i, c) does not change the value when i < 0 || i >= str.len() || c == 0
// when evaluating the second condition, i must be positive.
if (0 <= i && static_cast<uint32_t>(i) < lstring.length() && c != 0) lstring[i] = c;
return setString(lstring);
}
V3Number& V3Number::opGetcN(const V3Number& lhs, const V3Number& rhs) {
NUM_ASSERT_OP_ARGS2(lhs, rhs);
NUM_ASSERT_STRING_ARGS1(lhs);
const string lstring = lhs.toString();
const vlsint32_t i = rhs.toSInt();
vlsint32_t v = 0;
// 6.16.3:str.getc(i) returns 0 if i < 0 || i >= str.len()
// when evaluating the second condition, i must be positive.
if (0 <= i && static_cast<uint32_t>(i) < lstring.length()) v = lstring[i];
return setLong(v);
}
V3Number& V3Number::opSubstrN(const V3Number& lhs, const V3Number& rhs, const V3Number& ths) {
NUM_ASSERT_OP_ARGS3(lhs, rhs, ths);
NUM_ASSERT_STRING_ARGS1(lhs);
const string lstring = lhs.toString();
const vlsint32_t i = rhs.toSInt();
const vlsint32_t j = ths.toSInt();
// 6.16.8:str.substr(i, j) returns an empty string when i < 0 || j < i || j >= str.len()
// when evaluating the third condition, j must be positive because 0 <= i <= j is guaranteed by
// the former two conditions.
if (i < 0 || j < i || static_cast<uint32_t>(j) >= lstring.length()) return setString("");
// The second parameter of std::string::substr(i, n) is length, not position as SystemVerilog.
return setString(lstring.substr(i, j - i + 1));
}
V3Number& V3Number::opCompareNN(const V3Number& lhs, const V3Number& rhs, bool ignoreCase) {
NUM_ASSERT_OP_ARGS2(lhs, rhs);
NUM_ASSERT_STRING_ARGS2(lhs, rhs);