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Add 'is_subsequence_of' function to String

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This commit is contained in:
George Marques 2016-06-12 00:25:01 -03:00
parent e8209b9c5c
commit a6c37d2b5d
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GPG key ID: 046BD46A3201E43D
3 changed files with 51 additions and 0 deletions
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44
core/ustring.cpp
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@ -2752,6 +2752,50 @@ bool String::begins_with(const char* p_string) const {
}
bool String::is_subsequence_of(const String& p_string) const {
return _base_is_subsequence_of(p_string, false);
}
bool String::is_subsequence_ofi(const String& p_string) const {
return _base_is_subsequence_of(p_string, true);
}
bool String::_base_is_subsequence_of(const String& p_string, bool case_insensitive) const {
int len=length();
if (len == 0) {
// Technically an empty string is subsequence of any string
return true;
}
if (len > p_string.length()) {
return false;
}
const CharType *src = &operator[](0);
const CharType *tgt = &p_string[0];
for (;*src && *tgt;tgt++) {
bool match = false;
if (case_insensitive) {
CharType srcc = _find_lower(*src);
CharType tgtc = _find_lower(*tgt);
match = srcc == tgtc;
} else {
match = *src == *tgt;
}
if (match) {
src++;
if(!*src) {
return true;
}
}
}
return false;
}
static bool _wildcard_match(const CharType* p_pattern, const CharType* p_string,bool p_case_sensitive) {
switch (*p_pattern) {

3
core/ustring.h
View file

@ -66,6 +66,7 @@ class String : public Vector<CharType> {
void copy_from(const char *p_cstr);
void copy_from(const CharType* p_cstr, int p_clip_to=-1);
void copy_from(const CharType& p_char);
bool _base_is_subsequence_of(const String& p_string, bool case_insensitive) const;
public:
@ -122,6 +123,8 @@ public:
bool begins_with(const String& p_string) const;
bool begins_with(const char* p_string) const;
bool ends_with(const String& p_string) const;
bool is_subsequence_of(const String& p_string) const;
bool is_subsequence_ofi(const String& p_string) const;
String replace_first(String p_key,String p_with) const;
String replace(String p_key,String p_with) const;
String replacen(String p_key,String p_with) const;

4
core/variant_call.cpp
View file

@ -247,6 +247,8 @@ static void _call_##m_type##_##m_method(Variant& r_ret,Variant& p_self,const Var
VCALL_LOCALMEM1R(String,matchn);
VCALL_LOCALMEM1R(String,begins_with);
VCALL_LOCALMEM1R(String,ends_with);
VCALL_LOCALMEM1R(String,is_subsequence_of);
VCALL_LOCALMEM1R(String,is_subsequence_ofi);
VCALL_LOCALMEM2R(String,replace);
VCALL_LOCALMEM2R(String,replacen);
VCALL_LOCALMEM2R(String,insert);
@ -1269,6 +1271,8 @@ _VariantCall::addfunc(Variant::m_vtype,Variant::m_ret,_SCS(#m_method),VCALL(m_cl
ADDFUNC1(STRING,BOOL,String,matchn,STRING,"expr",varray());
ADDFUNC1(STRING,BOOL,String,begins_with,STRING,"text",varray());
ADDFUNC1(STRING,BOOL,String,ends_with,STRING,"text",varray());
ADDFUNC1(STRING,BOOL,String,is_subsequence_of,STRING,"text",varray());
ADDFUNC1(STRING,BOOL,String,is_subsequence_ofi,STRING,"text",varray());
ADDFUNC2(STRING,STRING,String,replace,STRING,"what",STRING,"forwhat",varray());
ADDFUNC2(STRING,STRING,String,replacen,STRING,"what",STRING,"forwhat",varray());