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Begin rewriting DqnString

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Doyle T 2018-07-29 16:15:23 +10:00
parent 21d04aa62c
commit 7ac814a625
1 changed files with 74 additions and 13 deletions
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87
dqn.h
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@ -1329,7 +1329,7 @@ struct DqnArray
DqnArray () = default;
DqnArray (DqnMemAPI *memAPI_) { *this = {}; this->memAPI = memAPI_; }
~DqnArray () { if (this->data && this->memAPI) this->memAPI->Free(data); }
// ~DqnArray () { if (this->data && this->memAPI) this->memAPI->Free(data); }
void UseMemory (T *data_, isize max_, isize count_ = 0) { this->memAPI = nullptr; this->data = data_; this->max = max_; this->count = count_; }
void Clear (Dqn::ZeroClear clear = Dqn::ZeroClear::No) { if (!data) return; count = 0; if (clear == Dqn::ZeroClear::Yes) DqnMem_Clear(data, 0, sizeof(T) * max); }
@ -1914,21 +1914,48 @@ struct DqnString
}
};
struct DqnSmartString : public DqnString
struct DqnString_
{
~DqnSmartString() { this->Free(); }
DqnMemAPI *memAPI = DQN_DEFAULT_HEAP_ALLOCATOR;
int len;
int max;
char *str;
DqnString_() = default;
DqnString_(char const *str_) { Append(str_); }
DqnString_(char const *str_, int len_) { Append(str_, len_); }
DqnString_(DqnSlice<char const> const &other) { Append(other.data, other.len); }
DqnString_(DqnSlice<char> const &other) { Append(other.data, other.len); }
DqnString_(DqnString_ const &other) { if (this == &other) return; Append(other.str, other.len); }
DqnString_ &operator+=(char const *other) { Append(other); return *this; }
DqnString_ &operator+=(DqnSlice<char const> const &other) { Append(other.data, other.len); return *this; }
DqnString_ &operator+=(DqnSlice<char> const &other) { Append(other.data, other.len); return *this; }
DqnString_ &operator+=(DqnString const &other) { Append(other.str, other.len); return *this; }
DqnString_ operator+ (char const *other) { auto result = *this; result.Append(other); return result; }
DqnString_ operator+ (DqnSlice<char const> const &other) { auto result = *this; result.Append(other.data, other.len); return result; }
DqnString_ operator+ (DqnSlice<char> const &other) { auto result = *this; result.Append(other.data, other.len); return result; }
DqnString_ operator+ (DqnString const &other) { auto result = *this; result.Append(other.str, other.len); return result; }
// Xprintf functions always modifies buffer and null-terminates even with insufficient buffer size.
// return: The number of characters copied to the buffer
int Sprintf (char const *fmt, ...) { va_list va; va_start(va, fmt); int result = VSprintf (fmt, va); va_end(va); return result; }
int SprintfAppend (char const *fmt, ...) { va_list va; va_start(va, fmt); int result = VSprintfAppend(fmt, va); va_end(va); return result; }
int VSprintf (char const *fmt, va_list va) { return VSprintfAtOffset(fmt, va, 0 /*offset*/); }
int VSprintfAppend (char const *fmt, va_list va) { return VSprintfAtOffset(fmt, va, len/*offset*/); }
void NullTerminate () { str[len] = 0; } // NOTE: If you modify the storage directly, this can be handy.
void Clear (Dqn::ZeroClear clear = Dqn::ZeroClear::No) { if (clear == Dqn::ZeroClear::Yes) DqnMem_Set(str, 0, max); len = max = 0; str[0] = 0; }
void Free () { if (str) memAPI->Free(str); str = nullptr; }
void Reserve (int newMax);
void Append (char const *src, int len_ = -1);
int VSprintfAtOffset(char const *fmt, va_list va, int offset) { Reserve(len + VAListLen(fmt, va)); int result = Dqn_vsnprintf(str + offset, max - len, fmt, va); len = (offset + result); return result; }
static int VAListLen (char const *fmt, va_list va);
};
DQN_FILE_SCOPE DqnString DqnString_(DqnMemAPI *const api = DQN_DEFAULT_HEAP_ALLOCATOR);
DQN_FILE_SCOPE DqnString DqnString_(DqnMemStack *const stack);
// NOTE: First level of indirection needs to turn the combined dqnstring_(guid) into a name. Otherwise
// each use of literalVarName will increment __COUNTER__
#define DQN_STRING_LITERAL_INTERNAL(srcVariable, literal, literalVarName) \
{}; \
char literalVarName[] = literal; \
srcVariable.InitLiteralNoAlloc(literalVarName, DQN_CHAR_COUNT(literalVarName))
// #DqnFixedString Public API - Fixed sized strings at compile time
// =================================================================================================
FILE_SCOPE int DqnFixedString__Append (char *dest, int destSize, char const *src, int len = -1);
@ -6516,6 +6543,40 @@ wchar_t *DqnString::ToWChar(DqnMemAPI *api) const
#endif
}
int DqnString_::VAListLen(char const *fmt, va_list va)
{
LOCAL_PERSIST char tmp[STB_SPRINTF_MIN];
auto PrintCallback = [](char *buf, void * /*user*/, int /*len*/) -> char * { return buf; };
int result = Dqn_vsprintfcb(PrintCallback, nullptr, tmp, fmt, va);
return result;
}
void DqnString_::Reserve(int newMax)
{
if (newMax >= this->max)
{
char *newPtr =
(this->str)
? static_cast<char *>(memAPI->Realloc(this->str, sizeof(this->str[0]) * this->len, newMax * sizeof(this->str[0])))
: static_cast<char *>(memAPI->Alloc(newMax * sizeof(this->str[0])));
DQN_ALWAYS_ASSERT(newPtr);
this->str = newPtr;
this->max = newMax;
}
}
void DqnString_::Append(char const *src, int len_)
{
if (len_ == -1)
len_ = DqnStr_Len(src);
Reserve(this->len + len_);
DqnMem_Copy(this->str + this->len, src, len_);
this->len += len_;
this->str[this->len] = 0;
}
// #DqnFixedString Implementation
// =================================================================================================
// return: The number of bytes written to dest