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// SciTE - Scintilla based Text Editor
/** @file SString.h
** A simple string class.
**/
// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#ifndef SSTRING_H
#define SSTRING_H
// These functions are implemented because each platform calls them something different.
int CompareCaseInsensitive(const char *a, const char *b);
int CompareNCaseInsensitive(const char *a, const char *b, size_t len);
bool EqualCaseInsensitive(const char *a, const char *b);
// Define another string class.
// While it would be 'better' to use std::string, that doubles the executable size.
// An SString may contain embedded nul characters.
/**
* @brief A simple string class.
*
* Hold the length of the string for quick operations,
* can have a buffer bigger than the string to avoid too many memory allocations and copies.
* May have embedded zeroes as a result of @a substitute, but relies too heavily on C string
* functions to allow reliable manipulations of these strings, other than simple appends, etc.
**/
class SString {
public:
/** Type of string lengths (sizes) and positions (indexes). */
typedef size_t lenpos_t;
/** Out of bounds value indicating that the string argument should be measured. */
enum { measure_length=0xffffffffU};
private:
char *s; ///< The C string
lenpos_t sSize; ///< The size of the buffer, less 1: ie. the maximum size of the string
lenpos_t sLen; ///< The size of the string in s
lenpos_t sizeGrowth; ///< Minimum growth size when appending strings
enum { sizeGrowthDefault = 64 };
bool grow(lenpos_t lenNew);
SString &assign(const char *sOther, lenpos_t sSize_=measure_length);
public:
SString() : s(0), sSize(0), sLen(0), sizeGrowth(sizeGrowthDefault) {
}
SString(const SString &source) : sizeGrowth(sizeGrowthDefault) {
s = StringAllocate(source.s);
sSize = sLen = (s) ? strlen(s) : 0;
}
SString(const char *s_) : sizeGrowth(sizeGrowthDefault) {
s = StringAllocate(s_);
sSize = sLen = (s) ? strlen(s) : 0;
}
SString(const char *s_, lenpos_t first, lenpos_t last) : sizeGrowth(sizeGrowthDefault) {
// note: expects the "last" argument to point one beyond the range end (a la STL iterators)
s = StringAllocate(s_ + first, last - first);
sSize = sLen = (s) ? strlen(s) : 0;
}
SString(int i);
SString(double d, int precision);
~SString() {
delete []s;
s = 0;
sSize = 0;
sLen = 0;
}
void clear() {
if (s) {
*s = '\0';
}
sLen = 0;
}
/** Size of buffer. */
lenpos_t size() const {
if (s)
return sSize;
else
return 0;
}
/** Size of string in buffer. */
lenpos_t length() const {
return sLen;
}
SString &operator=(const char *source) {
return assign(source);
}
SString &operator=(const SString &source) {
if (this != &source) {
assign(source.c_str());
}
return *this;
}
bool operator==(const SString &sOther) const;
bool operator!=(const SString &sOther) const {
return !operator==(sOther);
}
bool operator==(const char *sOther) const;
bool operator!=(const char *sOther) const {
return !operator==(sOther);
}
bool contains(char ch) {
return (s && *s) ? strchr(s, ch) != 0 : false;
}
void setsizegrowth(lenpos_t sizeGrowth_) {
sizeGrowth = sizeGrowth_;
}
const char *c_str() const {
return s ? s : "";
}
/** Give ownership of buffer to caller which must use delete[] to free buffer. */
char *detach() {
char *sRet = s;
s = 0;
sSize = 0;
sLen = 0;
return sRet;
}
char operator[](lenpos_t i) const {
return (s && i < sSize) ? s[i] : '\0';
}
SString substr(lenpos_t subPos, lenpos_t subLen=measure_length) const;
SString &lowercase(lenpos_t subPos = 0, lenpos_t subLen=measure_length);
SString &uppercase(lenpos_t subPos = 0, lenpos_t subLen=measure_length);
SString &append(const char *sOther, lenpos_t sLenOther=measure_length, char sep = '\0');
SString &operator+=(const char *sOther) {
return append(sOther, static_cast<lenpos_t>(measure_length));
}
SString &operator+=(const SString &sOther) {
return append(sOther.s, sOther.sLen);
}
SString &operator+=(char ch) {
return append(&ch, 1);
}
SString &appendwithseparator(const char *sOther, char sep) {
return append(sOther, strlen(sOther), sep);
}
SString &insert(lenpos_t pos, const char *sOther, lenpos_t sLenOther=measure_length);
/** Remove @a len characters from the @a pos position, included.
* Characters at pos + len and beyond replace characters at pos.
* If @a len is 0, or greater than the length of the string
* starting at @a pos, the string is just truncated at @a pos.
*/
void remove(lenpos_t pos, lenpos_t len);
SString &change(lenpos_t pos, char ch) {
if (pos < sLen) { // character changed must be in string bounds
*(s + pos) = ch;
}
return *this;
}
/** Read an integral numeric value from the string. */
int value() const {
return s ? atoi(s) : 0;
}
bool startswith(const char *prefix);
bool endswith(const char *suffix);
int search(const char *sFind, lenpos_t start=0) const;
bool contains(const char *sFind) {
return search(sFind) >= 0;
}
int substitute(char chFind, char chReplace);
int substitute(const char *sFind, const char *sReplace);
int remove(const char *sFind) {
return substitute(sFind, "");
}
/**
* Duplicate a C string.
* Allocate memory of the given size, or big enough to fit the string if length isn't given;
* then copy the given string in the allocated memory.
* @return the pointer to the new string
*/
static char *StringAllocate(
const char *s, ///< The string to duplicate
lenpos_t len=measure_length); ///< The length of memory to allocate. Optional.
};
/**
* Duplicate a C string.
* Allocate memory of the given size, or big enough to fit the string if length isn't given;
* then copy the given string in the allocated memory.
* @return the pointer to the new string
*/
inline char *StringDup(
const char *s, ///< The string to duplicate
SString::lenpos_t len=SString::measure_length) ///< The length of memory to allocate. Optional.
{
return SString::StringAllocate(s, len);
}
#endif
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