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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#ifndef cmStringAlgorithms_h
#define cmStringAlgorithms_h
#include "cmConfigure.h" // IWYU pragma: keep
#include "cmRange.h"
#include "cm_string_view.hxx"
#include <initializer_list>
#include <sstream>
#include <string.h>
#include <string>
#include <utility>
#include <vector>
/** String range type. */
typedef cmRange<std::vector<std::string>::const_iterator> cmStringRange;
/** Callable string comparison struct. */
struct cmStrCmp
{
cmStrCmp(std::string str)
: Test_(std::move(str))
{
}
bool operator()(cm::string_view sv) const { return Test_ == sv; }
private:
std::string const Test_;
};
/** Joins elements of a range with separator into a single string. */
template <typename Range>
std::string cmJoin(Range const& rng, cm::string_view separator)
{
if (rng.empty()) {
return std::string();
}
std::ostringstream os;
auto it = rng.begin();
auto const end = rng.end();
os << *it;
while (++it != end) {
os << separator << *it;
}
return os.str();
}
/** Concatenate string pieces into a single string. */
std::string cmCatViews(std::initializer_list<cm::string_view> views);
/** Utility class for cmStrCat. */
class cmAlphaNum
{
public:
cmAlphaNum(cm::string_view view)
: View_(view)
{
}
cmAlphaNum(std::string const& str)
: View_(str)
{
}
cmAlphaNum(const char* str)
: View_(str)
{
}
cmAlphaNum(char ch)
: View_(Digits_, 1)
{
Digits_[0] = ch;
}
cmAlphaNum(int val);
cmAlphaNum(unsigned int val);
cmAlphaNum(long int val);
cmAlphaNum(unsigned long int val);
cmAlphaNum(long long int val);
cmAlphaNum(unsigned long long int val);
cmAlphaNum(float val);
cmAlphaNum(double val);
cm::string_view View() const { return View_; }
private:
cm::string_view View_;
char Digits_[32];
};
/** Concatenate string pieces and numbers into a single string. */
template <typename... AV>
inline std::string cmStrCat(cmAlphaNum const& a, cmAlphaNum const& b,
AV const&... args)
{
return cmCatViews(
{ a.View(), b.View(), static_cast<cmAlphaNum const&>(args).View()... });
}
/** Joins wrapped elements of a range with separator into a single string. */
template <typename Range>
std::string cmWrap(cm::string_view prefix, Range const& rng,
cm::string_view suffix, cm::string_view sep)
{
if (rng.empty()) {
return std::string();
}
return cmCatViews(
{ prefix, cmJoin(rng, cmCatViews({ suffix, sep, prefix })), suffix });
}
/** Joins wrapped elements of a range with separator into a single string. */
template <typename Range>
std::string cmWrap(char prefix, Range const& rng, char suffix,
cm::string_view sep)
{
return cmWrap(cm::string_view(&prefix, 1), rng, cm::string_view(&suffix, 1),
sep);
}
/** Returns true if string @a str starts with the character @a prefix. */
inline bool cmHasPrefix(cm::string_view str, char prefix)
{
return !str.empty() && (str.front() == prefix);
}
/** Returns true if string @a str starts with string @a prefix. */
inline bool cmHasPrefix(cm::string_view str, cm::string_view prefix)
{
return str.compare(0, prefix.size(), prefix) == 0;
}
/** Returns true if string @a str starts with string @a prefix. */
template <size_t N>
inline bool cmHasLiteralPrefix(cm::string_view str, const char (&prefix)[N])
{
return cmHasPrefix(str, cm::string_view(prefix, N - 1));
}
/** Returns true if string @a str ends with the character @a suffix. */
inline bool cmHasSuffix(cm::string_view str, char suffix)
{
return !str.empty() && (str.back() == suffix);
}
/** Returns true if string @a str ends with string @a suffix. */
inline bool cmHasSuffix(cm::string_view str, cm::string_view suffix)
{
return str.size() >= suffix.size() &&
str.compare(str.size() - suffix.size(), suffix.size(), suffix) == 0;
}
/** Returns true if string @a str ends with string @a suffix. */
template <size_t N>
inline bool cmHasLiteralSuffix(cm::string_view str, const char (&suffix)[N])
{
return cmHasSuffix(str, cm::string_view(suffix, N - 1));
}
/** Removes an existing suffix character of from the string @a str. */
inline void cmStripSuffixIfExists(std::string& str, char suffix)
{
if (cmHasSuffix(str, suffix)) {
str.pop_back();
}
}
/** Removes an existing suffix string of from the string @a str. */
inline void cmStripSuffixIfExists(std::string& str, cm::string_view suffix)
{
if (cmHasSuffix(str, suffix)) {
str.resize(str.size() - suffix.size());
}
}
#endif
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