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// SciTE - Scintilla based Text Editor
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** A simple string class.
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// Copyright 1998-2004 by Neil Hodgson <neilh@scintilla.org>
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// The License.txt file describes the conditions under which this software may be distributed.
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// These functions are implemented because each platform calls them something different.
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int CompareCaseInsensitive(const char *a, const char *b);
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int CompareNCaseInsensitive(const char *a, const char *b, size_t len);
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bool EqualCaseInsensitive(const char *a, const char *b);
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// Define another string class.
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// While it would be 'better' to use std::string, that doubles the executable size.
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// An SString may contain embedded nul characters.
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* Base class from which the two other classes (SBuffer & SString)
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/** Type of string lengths (sizes) and positions (indexes). */
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typedef size_t lenpos_t;
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/** Out of bounds value indicating that the string argument should be measured. */
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enum { measure_length=0xffffffffU};
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char *s; ///< The C string
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lenpos_t sSize; ///< The size of the buffer, less 1: ie. the maximum size of the string
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SContainer() : s(0), sSize(0) {}
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delete []s; // Suppose it was allocated using StringAllocate
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/** Size of buffer. */
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lenpos_t size() const {
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* Allocate uninitialized memory big enough to fit a string of the given length.
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* @return the pointer to the new string
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static char *StringAllocate(lenpos_t len);
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* Duplicate a buffer/C string.
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* Allocate memory of the given size, or big enough to fit the string if length isn't given;
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* then copy the given string in the allocated memory.
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* @return the pointer to the new string
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static char *StringAllocate(
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const char *s, ///< The string to duplicate
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lenpos_t len=measure_length); ///< The length of memory to allocate. Optional.
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* @brief A string buffer class.
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* Main use is to ask an API the length of a string it can provide,
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* then to allocate a buffer of the given size, and to provide this buffer
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* to the API to put the string.
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* This class is intended to be shortlived, to be transformed as SString
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* as soon as it holds the string, so it has little members.
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* Note: we assume the buffer is filled by the API. If the length can be shorter,
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* we should set sLen to strlen(sb.ptr()) in related SString constructor and assignment.
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class SBuffer : protected SContainer {
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SBuffer(lenpos_t len) {
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s = StringAllocate(len);
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// Here only to be on the safe size, user should avoid returning SBuffer values.
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SBuffer(const SBuffer &source) : SContainer() {
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s = StringAllocate(source.s, source.sSize);
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sSize = (s) ? source.sSize : 0;
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/// Default assignment operator
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// Same here, shouldn't be used
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SBuffer &operator=(const SBuffer &source) {
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if (this != &source) {
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s = StringAllocate(source.s, source.sSize);
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sSize = (s) ? source.sSize : 0;
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/** Provide direct read/write access to buffer. */
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/** Ownership of the buffer have been taken, so release it. */
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/** Size of buffer. */
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lenpos_t size() const {
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return SContainer::size();
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* @brief A simple string class.
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* Hold the length of the string for quick operations,
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* can have a buffer bigger than the string to avoid too many memory allocations and copies.
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* May have embedded zeroes as a result of @a substitute, but relies too heavily on C string
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* functions to allow reliable manipulations of these strings, other than simple appends, etc.
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class SString : protected SContainer {
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lenpos_t sLen; ///< The size of the string in s
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lenpos_t sizeGrowth; ///< Minimum growth size when appending strings
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enum { sizeGrowthDefault = 64 };
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bool grow(lenpos_t lenNew);
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SString &assign(const char *sOther, lenpos_t sSize_=measure_length);
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SString() : sLen(0), sizeGrowth(sizeGrowthDefault) {}
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SString(const SString &source) : SContainer(), sizeGrowth(sizeGrowthDefault) {
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s = StringAllocate(source.s, source.sLen);
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sSize = sLen = (s) ? source.sLen : 0;
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SString(const char *s_) : sizeGrowth(sizeGrowthDefault) {
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s = StringAllocate(s_);
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sSize = sLen = (s) ? strlen(s) : 0;
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SString(SBuffer &buf) : sizeGrowth(sizeGrowthDefault) {
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sSize = sLen = buf.size();
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// Consumes the given buffer!
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SString(const char *s_, lenpos_t first, lenpos_t last) : sizeGrowth(sizeGrowthDefault) {
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// note: expects the "last" argument to point one beyond the range end (a la STL iterators)
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s = StringAllocate(s_ + first, last - first);
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sSize = sLen = (s) ? last - first : 0;
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SString(double d, int precision);
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/** Size of buffer. */
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lenpos_t size() const {
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return SContainer::size();
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/** Size of string in buffer. */
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lenpos_t length() const {
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/** Read access to a character of the string. */
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char operator[](lenpos_t i) const {
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return (s && i < sSize) ? s[i] : '\0';
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SString &operator=(const char *source) {
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return assign(source);
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SString &operator=(const SString &source) {
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if (this != &source) {
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assign(source.s, source.sLen);
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bool operator==(const SString &sOther) const;
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bool operator!=(const SString &sOther) const {
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return !operator==(sOther);
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bool operator==(const char *sOther) const;
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bool operator!=(const char *sOther) const {
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return !operator==(sOther);
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bool contains(char ch) const {
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return (s && *s) ? strchr(s, ch) != 0 : false;
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void setsizegrowth(lenpos_t sizeGrowth_) {
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sizeGrowth = sizeGrowth_;
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const char *c_str() const {
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/** Give ownership of buffer to caller which must use delete[] to free buffer. */
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SString substr(lenpos_t subPos, lenpos_t subLen=measure_length) const;
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SString &lowercase(lenpos_t subPos = 0, lenpos_t subLen=measure_length);
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SString &uppercase(lenpos_t subPos = 0, lenpos_t subLen=measure_length);
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SString &append(const char *sOther, lenpos_t sLenOther=measure_length, char sep = '\0');
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SString &operator+=(const char *sOther) {
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return append(sOther, static_cast<lenpos_t>(measure_length));
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SString &operator+=(const SString &sOther) {
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return append(sOther.s, sOther.sLen);
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SString &operator+=(char ch) {
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return append(&ch, 1);
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SString &appendwithseparator(const char *sOther, char sep) {
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return append(sOther, strlen(sOther), sep);
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SString &insert(lenpos_t pos, const char *sOther, lenpos_t sLenOther=measure_length);
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* Remove @a len characters from the @a pos position, included.
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* Characters at pos + len and beyond replace characters at pos.
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* If @a len is 0, or greater than the length of the string
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* starting at @a pos, the string is just truncated at @a pos.
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void remove(lenpos_t pos, lenpos_t len);
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SString &change(lenpos_t pos, char ch) {
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if (pos < sLen) { // character changed must be in string bounds
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/** Read an integral numeric value from the string. */
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return s ? atoi(s) : 0;
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bool startswith(const char *prefix);
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bool endswith(const char *suffix);
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int search(const char *sFind, lenpos_t start=0) const;
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bool contains(const char *sFind) const {
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return search(sFind) >= 0;
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int substitute(char chFind, char chReplace);
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int substitute(const char *sFind, const char *sReplace);
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int remove(const char *sFind) {
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return substitute(sFind, "");
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* Duplicate a C string.
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* Allocate memory of the given size, or big enough to fit the string if length isn't given;
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* then copy the given string in the allocated memory.
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* @return the pointer to the new string
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inline char *StringDup(
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const char *s, ///< The string to duplicate
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SContainer::lenpos_t len=SContainer::measure_length) ///< The length of memory to allocate. Optional.
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return SContainer::StringAllocate(s, len);
added
removed
deprecated/management/profile-editor/src/wxStyledTextCtrl/SString.h
