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-rw-r--r--include/SString.h167
1 files changed, 124 insertions, 43 deletions
diff --git a/include/SString.h b/include/SString.h
index 659f8b0c8..afe1a902c 100644
--- a/include/SString.h
+++ b/include/SString.h
@@ -2,7 +2,7 @@
/** @file SString.h
** A simple string class.
**/
-// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
+// Copyright 1998-2004 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#ifndef SSTRING_H
@@ -18,23 +18,117 @@ bool EqualCaseInsensitive(const char *a, const char *b);
// 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 {
+ * Base class from which the two other classes (SBuffer & SString)
+ * are derived.
+ */
+class SContainer {
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:
+protected:
char *s; ///< The C string
lenpos_t sSize; ///< The size of the buffer, less 1: ie. the maximum size of the string
+
+ SContainer() : s(0), sSize(0) {}
+ ~SContainer() {
+ delete []s; // Suppose it was allocated using StringAllocate
+ s = 0;
+ sSize = 0;
+ }
+ /** Size of buffer. */
+ lenpos_t size() const {
+ if (s) {
+ return sSize;
+ } else {
+ return 0;
+ }
+ }
+public:
+ /**
+ * Allocate uninitialized memory big enough to fit a string of the given length.
+ * @return the pointer to the new string
+ */
+ static char *StringAllocate(lenpos_t len);
+ /**
+ * Duplicate a buffer/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.
+};
+
+
+/**
+ * @brief A string buffer class.
+ *
+ * Main use is to ask an API the length of a string it can provide,
+ * then to allocate a buffer of the given size, and to provide this buffer
+ * to the API to put the string.
+ * This class is intended to be shortlived, to be transformed as SString
+ * as soon as it holds the string, so it has little members.
+ * Note: we assume the buffer is filled by the API. If the length can be shorter,
+ * we should set sLen to strlen(sb.ptr()) in related SString constructor and assignment.
+ */
+class SBuffer : protected SContainer {
+public:
+ SBuffer(lenpos_t len) {
+ s = StringAllocate(len);
+ if (s) {
+ *s = '\0';
+ sSize = len;
+ } else {
+ sSize = 0;
+ }
+ }
+private:
+ /// Copy constructor
+ // Here only to be on the safe size, user should avoid returning SBuffer values.
+ SBuffer(const SBuffer &source) : SContainer() {
+ s = StringAllocate(source.s, source.sSize);
+ sSize = (s) ? source.sSize : 0;
+ }
+ /// Default assignment operator
+ // Same here, shouldn't be used
+ SBuffer &operator=(const SBuffer &source) {
+ if (this != &source) {
+ delete []s;
+ s = StringAllocate(source.s, source.sSize);
+ sSize = (s) ? source.sSize : 0;
+ }
+ return *this;
+ }
+public:
+ /** Provide direct read/write access to buffer. */
+ char *ptr() {
+ return s;
+ }
+ /** Ownership of the buffer have been taken, so release it. */
+ void reset() {
+ s = 0;
+ sSize = 0;
+ }
+ /** Size of buffer. */
+ lenpos_t size() const {
+ return SContainer::size();
+ }
+};
+
+
+/**
+ * @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 : protected SContainer {
lenpos_t sLen; ///< The size of the string in s
lenpos_t sizeGrowth; ///< Minimum growth size when appending strings
enum { sizeGrowthDefault = 64 };
@@ -43,27 +137,29 @@ private:
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() : sLen(0), sizeGrowth(sizeGrowthDefault) {}
+ SString(const SString &source) : SContainer(), sizeGrowth(sizeGrowthDefault) {
+ s = StringAllocate(source.s, source.sLen);
+ sSize = sLen = (s) ? source.sLen : 0;
}
SString(const char *s_) : sizeGrowth(sizeGrowthDefault) {
s = StringAllocate(s_);
sSize = sLen = (s) ? strlen(s) : 0;
}
+ SString(SBuffer &buf) : sizeGrowth(sizeGrowthDefault) {
+ s = buf.ptr();
+ sSize = sLen = buf.size();
+ // Consumes the given buffer!
+ buf.reset();
+ }
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;
+ sSize = sLen = (s) ? last - first : 0;
}
SString(int i);
SString(double d, int precision);
~SString() {
- delete []s;
- s = 0;
- sSize = 0;
sLen = 0;
}
void clear() {
@@ -74,21 +170,22 @@ public:
}
/** Size of buffer. */
lenpos_t size() const {
- if (s)
- return sSize;
- else
- return 0;
+ return SContainer::size();
}
/** Size of string in buffer. */
lenpos_t length() const {
return sLen;
}
+ /** Read access to a character of the string. */
+ char operator[](lenpos_t i) const {
+ return (s && i < sSize) ? s[i] : '\0';
+ }
SString &operator=(const char *source) {
return assign(source);
}
SString &operator=(const SString &source) {
if (this != &source) {
- assign(source.c_str(), source.sLen);
+ assign(source.s, source.sLen);
}
return *this;
}
@@ -129,9 +226,6 @@ public:
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);
@@ -179,22 +273,9 @@ public:
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.
- /**
- * Allocate uninitialized memory big enough to fit a string of the given length
- * @return the pointer to the new string
- */
- static char *StringAllocate(lenpos_t len);
};
+
/**
* Duplicate a C string.
* Allocate memory of the given size, or big enough to fit the string if length isn't given;
@@ -203,9 +284,9 @@ public:
*/
inline char *StringDup(
const char *s, ///< The string to duplicate
- SString::lenpos_t len=SString::measure_length) ///< The length of memory to allocate. Optional.
+ SContainer::lenpos_t len=SContainer::measure_length) ///< The length of memory to allocate. Optional.
{
- return SString::StringAllocate(s, len);
+ return SContainer::StringAllocate(s, len);
}
#endif
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-04 07:30:25 +0000