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add API to access unescaped strings, update documentation of Z3_get_lstring, #5615

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-10-21 11:30:03 -04:00
parent 6eed885379
commit 05e7ed9637
2 changed files with 53 additions and 1 deletions
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32
src/api/api_seq.cpp
View file

@ -215,6 +215,38 @@ extern "C" {
Z3_CATCH_RETURN("");
}
unsigned Z3_API Z3_get_string_length(Z3_context c, Z3_ast s) {
Z3_TRY;
LOG_Z3_get_string_length(c, s);
RESET_ERROR_CODE();
zstring str;
if (!mk_c(c)->sutil().str.is_string(to_expr(s), str)) {
SET_ERROR_CODE(Z3_INVALID_ARG, "expression is not a string literal");
}
return str.length();
Z3_CATCH_RETURN(0);
}
void Z3_API Z3_get_string_contents(Z3_context c, Z3_ast s, unsigned length, unsigned* contents) {
Z3_TRY;
LOG_Z3_get_string_contents(c, s, length, contents);
RESET_ERROR_CODE();
zstring str;
if (!mk_c(c)->sutil().str.is_string(to_expr(s), str)) {
SET_ERROR_CODE(Z3_INVALID_ARG, "expression is not a string literal");
return;
}
if (str.length() != length) {
SET_ERROR_CODE(Z3_INVALID_ARG, "string size disagrees with supplied buffer length");
return;
}
for (unsigned i = 0; i < length; ++i)
contents[i] = str[i];
Z3_CATCH;
}
#define MK_SORTED(NAME, FN ) \
Z3_ast Z3_API NAME(Z3_context c, Z3_sort s) { \
Z3_TRY; \

22
src/api/z3_api.h
View file

@ -3510,14 +3510,34 @@ extern "C" {
Z3_string Z3_API Z3_get_string(Z3_context c, Z3_ast s);
/**
\brief Retrieve the unescaped string constant stored in \c s.
\brief Retrieve the string constant stored in \c s. The string can contain escape sequences.
\pre Z3_is_string(c, s)
def_API('Z3_get_lstring', CHAR_PTR, (_in(CONTEXT), _in(AST), _out(UINT)))
*/
Z3_char_ptr Z3_API Z3_get_lstring(Z3_context c, Z3_ast s, unsigned* length);
/**
\brief Retrieve the length of the unescaped string constant stored in \c s.
\pre Z3_is_string(c, s)
def_API('Z3_get_string_length', UINT, (_in(CONTEXT), _in(AST)))
*/
unsigned Z3_API Z3_get_string_length(Z3_context c, Z3_ast s);
/**
\brief Retrieve the unescaped string constant stored in \c s.
\pre Z3_is_string(c, s)
\pre length contains the number of characters in s
def_API('Z3_get_string_contents', VOID, (_in(CONTEXT), _in(AST), _in(UINT), _out_array(2, UINT)))
*/
void Z3_API Z3_get_string_contents(Z3_context c, Z3_ast s, unsigned length, unsigned* buffer);
/**
\brief Create an empty sequence of the sequence sort \c seq.