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#5615 - update documentation and use non-encoded versions for ASCII characters in get_lstring

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-10-23 18:21:51 +02:00
parent 7f41d6140f
commit 3a3cef8fce
3 changed files with 13 additions and 7 deletions
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2
src/api/api_seq.cpp
View file

@ -198,7 +198,7 @@ extern "C" {
svector<char> buff;
for (unsigned i = 0; i < str.length(); ++i) {
unsigned ch = str[i];
if (ch <= 32 || ch >= 127 || (ch == '\\' && i + 1 < str.length() && str[i+1] == 'u')) {
if (ch == 0 || ch >= 256 || (ch == '\\' && i + 1 < str.length() && str[i+1] == 'u')) {
buff.reset();
buffer.push_back('\\');
buffer.push_back('u');

7
src/api/c++/z3++.h
View file

@ -1120,12 +1120,9 @@ namespace z3 {
std::u32string get_u32string() const {
assert(is_string_value());
unsigned n = Z3_get_string_length(ctx(), m_ast);
std::vector<unsigned> buffer;
buffer.resize(n);
Z3_get_string_contents(ctx(), m_ast, n, buffer.data());
std::u32string s;
for (auto ch : buffer)
s.push_back(ch);
s.resize(n);
Z3_get_string_contents(ctx(), m_ast, n, (unsigned*)s.data());
return s;
}

11
src/api/z3_api.h
View file

@ -3480,6 +3480,11 @@ extern "C" {
/**
\brief Create a string constant out of the string that is passed in
The string may contain escape encoding for non-printable characters
or characters outside of the basic printable ASCII range. For example,
the escape encoding \u{0} represents the character 0 and the encoding
\u{100} represents the character 256.
def_API('Z3_mk_string', AST, (_in(CONTEXT), _in(STRING)))
*/
Z3_ast Z3_API Z3_mk_string(Z3_context c, Z3_string s);
@ -3487,7 +3492,8 @@ extern "C" {
/**
\brief Create a string constant out of the string that is passed in
It takes the length of the string as well to take into account
0 characters. The string is unescaped.
0 characters. The string is treated as if it is unescaped so a sequence
of characters \u{0} is treated as 5 characters and not the character 0.
def_API('Z3_mk_lstring', AST, (_in(CONTEXT), _in(UINT), _in(STRING)))
*/
@ -3511,6 +3517,7 @@ extern "C" {
/**
\brief Retrieve the string constant stored in \c s.
Characters outside the basic printiable ASCII range are escaped.
\pre Z3_is_string(c, s)
@ -3520,6 +3527,8 @@ extern "C" {
/**
\brief Retrieve the string constant stored in \c s. The string can contain escape sequences.
Characters in the range 1 to 255 are literal.
Characters in the range 0, and 256 above are escaped.
\pre Z3_is_string(c, s)