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Move all non-core string code to string_utils.{hh,cc}

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This commit is contained in:
Maxime Coste 2017-10-09 22:12:42 +08:00
parent d1b9c24afc
commit 6ada6e6d77
19 changed files with 584 additions and 552 deletions
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1
src/color.cc
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@ -2,6 +2,7 @@
#include "exception.hh"
#include "ranges.hh"
#include "string_utils.hh"
#include <cstdio>

1
src/commands.cc
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@ -28,6 +28,7 @@
#include "user_interface.hh"
#include "window.hh"
#include <cstring>
#include <functional>
#include <utility>

1
src/face_registry.cc
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@ -2,6 +2,7 @@
#include "exception.hh"
#include "ranges.hh"
#include "string_utils.hh"
namespace Kakoune
{

1
src/file.cc
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@ -10,6 +10,7 @@
#include "unicode.hh"
#include <cerrno>
#include <cstring>
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>

1
src/highlighter_group.cc
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@ -1,6 +1,7 @@
#include "highlighter_group.hh"
#include "ranges.hh"
#include "string_utils.hh"
namespace Kakoune
{

1
src/json_ui.cc
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@ -6,6 +6,7 @@
#include "file.hh"
#include "keys.hh"
#include "ranges.hh"
#include "string_utils.hh"
#include "unit_tests.hh"
#include "value.hh"

1
src/keys.cc
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@ -6,6 +6,7 @@
#include "unit_tests.hh"
#include "utf8_iterator.hh"
#include "utils.hh"
#include "string_utils.hh"
namespace Kakoune
{

1
src/ncurses_ui.cc
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@ -4,6 +4,7 @@
#include "event_manager.hh"
#include "keys.hh"
#include "ranges.hh"
#include "string_utils.hh"
#include <algorithm>

1
src/option_manager.hh
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@ -8,6 +8,7 @@
#include "ranges.hh"
#include "utils.hh"
#include "vector.hh"
#include "string_utils.hh"
#include <memory>
#include <type_traits>

1
src/parameters_parser.hh
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@ -7,6 +7,7 @@
#include "array_view.hh"
#include "optional.hh"
#include "string.hh"
#include "string_utils.hh"
namespace Kakoune
{

1
src/ranked_match.cc
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@ -3,6 +3,7 @@
#include "flags.hh"
#include "unit_tests.hh"
#include "utf8_iterator.hh"
#include "optional.hh"
#include <algorithm>

1
src/regex.hh
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@ -2,6 +2,7 @@
#define regex_hh_INCLUDED
#include "string.hh"
#include "string_utils.hh"
#include "exception.hh"
#include "utf8_iterator.hh"

1
src/register_manager.cc
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@ -2,6 +2,7 @@
#include "assert.hh"
#include "hash_map.hh"
#include "string_utils.hh"
namespace Kakoune
{

1
src/remote.hh
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@ -5,6 +5,7 @@
#include "exception.hh"
#include "utils.hh"
#include "vector.hh"
#include "optional.hh"
#include <memory>

2
src/shared_string.cc
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@ -1,6 +1,8 @@
#include "shared_string.hh"
#include "buffer_utils.hh"
#include <cstring>
namespace Kakoune
{

447
src/string.cc
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@ -1,11 +1,7 @@
#include "string.hh"
#include "exception.hh"
#include "ranges.hh"
#include "unit_tests.hh"
#include "utf8_iterator.hh"
#include <cstdio>
#include <cstring>
namespace Kakoune
{
@ -164,445 +160,4 @@ void String::Data::set_short(const char* data, size_t size)
const String String::ms_empty;
Vector<String> split(StringView str, char separator, char escape)
{
Vector<String> res;
auto it = str.begin();
auto start = it;
while (it != str.end())
{
res.emplace_back();
String& element = res.back();
while (it != str.end())
{
auto c = *it;
if (c == escape and it + 1 != str.end() and *(it+1) == separator)
{
element += StringView{start, it+1};
element.back() = separator;
it += 2;
start = it;
}
else if (c == separator)
{
element += StringView{start, it};
++it;
start = it;
break;
}
else
++it;
}
}
if (start != str.end())
res.back() += StringView{start, str.end()};
return res;
}
Vector<StringView> split(StringView str, char separator)
{
Vector<StringView> res;
if (str.empty())
return res;
auto beg = str.begin();
for (auto it = beg; it != str.end(); ++it)
{
if (*it == separator)
{
res.emplace_back(beg, it);
beg = it + 1;
}
}
res.emplace_back(beg, str.end());
return res;
}
StringView trim_whitespaces(StringView str)
{
auto beg = str.begin(), end = str.end();
while (beg != end and is_blank(*beg))
++beg;
while (beg != end and is_blank(*(end-1)))
--end;
return {beg, end};
}
String escape(StringView str, StringView characters, char escape)
{
String res;
res.reserve(str.length());
auto cbeg = characters.begin(), cend = characters.end();
for (auto it = str.begin(), end = str.end(); it != end; )
{
auto next = std::find_first_of(it, end, cbeg, cend);
if (next != end)
{
res += StringView{it, next+1};
res.back() = escape;
res += *next;
it = next+1;
}
else
{
res += StringView{it, next};
break;
}
}
return res;
}
String unescape(StringView str, StringView characters, char escape)
{
String res;
res.reserve(str.length());
for (auto it = str.begin(), end = str.end(); it != end; )
{
auto next = std::find(it, end, escape);
if (next != end and next+1 != end and contains(characters, *(next+1)))
{
res += StringView{it, next+1};
res.back() = *(next+1);
it = next + 2;
}
else
{
res += StringView{it, next == end ? next : next + 1};
it = next == end ? next : next + 1;
}
}
return res;
}
String indent(StringView str, StringView indent)
{
String res;
res.reserve(str.length());
bool was_eol = true;
for (ByteCount i = 0; i < str.length(); ++i)
{
if (was_eol)
res += indent;
res += str[i];
was_eol = is_eol(str[i]);
}
return res;
}
String replace(StringView str, StringView substr, StringView replacement)
{
String res;
for (auto it = str.begin(); it != str.end(); )
{
auto match = std::search(it, str.end(), substr.begin(), substr.end());
res += StringView{it, match};
if (match == str.end())
break;
res += replacement;
it = match + (int)substr.length();
}
return res;
}
Optional<int> str_to_int_ifp(StringView str)
{
bool negative = not str.empty() and str[0] == '-';
if (negative)
str = str.substr(1_byte);
unsigned int res = 0;
for (auto c : str)
{
if (c < '0' or c > '9')
return {};
res = res * 10 + c - '0';
}
return negative ? -res : res;
}
int str_to_int(StringView str)
{
if (auto val = str_to_int_ifp(str))
return *val;
throw runtime_error{str + " is not a number"};
}
InplaceString<15> to_string(int val)
{
InplaceString<15> res;
res.m_length = sprintf(res.m_data, "%i", val);
return res;
}
InplaceString<23> to_string(long int val)
{
InplaceString<23> res;
res.m_length = sprintf(res.m_data, "%li", val);
return res;
}
InplaceString<23> to_string(long long int val)
{
InplaceString<23> res;
res.m_length = sprintf(res.m_data, "%lli", val);
return res;
}
InplaceString<23> to_string(size_t val)
{
InplaceString<23> res;
res.m_length = sprintf(res.m_data, "%zu", val);
return res;
}
InplaceString<23> to_string(Hex val)
{
InplaceString<23> res;
res.m_length = sprintf(res.m_data, "%zx", val.val);
return res;
}
InplaceString<23> to_string(float val)
{
InplaceString<23> res;
res.m_length = sprintf(res.m_data, "%f", val);
return res;
}
InplaceString<7> to_string(Codepoint c)
{
InplaceString<7> res;
char* ptr = res.m_data;
utf8::dump(ptr, c);
res.m_length = (int)(ptr - res.m_data);
return res;
}
bool subsequence_match(StringView str, StringView subseq)
{
auto it = str.begin();
for (auto& c : subseq)
{
if (it == str.end())
return false;
while (*it != c)
{
if (++it == str.end())
return false;
}
++it;
}
return true;
}
String expand_tabs(StringView line, ColumnCount tabstop, ColumnCount col)
{
String res;
res.reserve(line.length());
for (auto it = line.begin(), end = line.end(); it != end; )
{
if (*it == '\t')
{
ColumnCount end_col = (col / tabstop + 1) * tabstop;
res += String{' ', end_col - col};
col = end_col;
++it;
}
else
{
auto char_beg = it;
auto cp = utf8::read_codepoint(it, end);
res += {char_beg, it};
col += codepoint_width(cp);
}
}
return res;
}
Vector<StringView> wrap_lines(StringView text, ColumnCount max_width)
{
if (max_width <= 0)
throw runtime_error("Invalid max width");
using Utf8It = utf8::iterator<const char*>;
Utf8It it{text.begin(), text};
Utf8It end{text.end(), text};
Utf8It line_begin = it;
Utf8It last_word_end = it;
Vector<StringView> lines;
while (it != end)
{
const CharCategories cat = categorize(*it, {});
if (cat == CharCategories::EndOfLine)
{
lines.emplace_back(line_begin.base(), it.base());
line_begin = it = it+1;
continue;
}
Utf8It word_end = it+1;
while (word_end != end and categorize(*word_end, {}) == cat)
++word_end;
while (word_end > line_begin and
utf8::column_distance(line_begin.base(), word_end.base()) >= max_width)
{
auto line_end = last_word_end <= line_begin ?
Utf8It{utf8::advance(line_begin.base(), text.end(), max_width), text}
: last_word_end;
lines.emplace_back(line_begin.base(), line_end.base());
while (line_end != end and is_horizontal_blank(*line_end))
++line_end;
if (line_end != end and *line_end == '\n')
++line_end;
it = line_begin = line_end;
}
if (cat == CharCategories::Word or cat == CharCategories::Punctuation)
last_word_end = word_end;
if (word_end > line_begin)
it = word_end;
}
if (line_begin != end)
lines.emplace_back(line_begin.base(), text.end());
return lines;
}
template<typename AppendFunc>
void format_impl(StringView fmt, ArrayView<const StringView> params, AppendFunc append)
{
int implicitIndex = 0;
for (auto it = fmt.begin(), end = fmt.end(); it != end;)
{
auto opening = std::find(it, end, '{');
if (opening == end)
{
append(StringView{it, opening});
break;
}
else if (opening != it and *(opening-1) == '\\')
{
append(StringView{it, opening-1});
append('{');
it = opening + 1;
}
else
{
append(StringView{it, opening});
auto closing = std::find(opening, end, '}');
if (closing == end)
throw runtime_error("Format string error, unclosed '{'");
const int index = (closing == opening + 1) ?
implicitIndex : str_to_int({opening+1, closing});
if (index >= params.size())
throw runtime_error("Format string parameter index too big");
append(params[index]);
implicitIndex = index+1;
it = closing+1;
}
}
}
StringView format_to(ArrayView<char> buffer, StringView fmt, ArrayView<const StringView> params)
{
char* ptr = buffer.begin();
const char* end = buffer.end();
format_impl(fmt, params, [&](StringView s) mutable {
for (auto c : s)
{
if (ptr == end)
throw runtime_error("buffer is too small");
*ptr++ = c;
}
});
if (ptr == end)
throw runtime_error("buffer is too small");
*ptr = 0;
return { buffer.begin(), ptr };
}
String format(StringView fmt, ArrayView<const StringView> params)
{
ByteCount size = fmt.length();
for (auto& s : params) size += s.length();
String res;
res.reserve(size);
format_impl(fmt, params, [&](StringView s) { res += s; });
return res;
}
UnitTest test_string{[]()
{
kak_assert(String("youpi ") + "matin" == "youpi matin");
Vector<String> splited = split("youpi:matin::tchou\\:kanaky:hihi\\:", ':', '\\');
kak_assert(splited[0] == "youpi");
kak_assert(splited[1] == "matin");
kak_assert(splited[2] == "");
kak_assert(splited[3] == "tchou:kanaky");
kak_assert(splited[4] == "hihi:");
Vector<StringView> splitedview = split("youpi:matin::tchou\\:kanaky:hihi\\:", ':');
kak_assert(splitedview[0] == "youpi");
kak_assert(splitedview[1] == "matin");
kak_assert(splitedview[2] == "");
kak_assert(splitedview[3] == "tchou\\");
kak_assert(splitedview[4] == "kanaky");
kak_assert(splitedview[5] == "hihi\\");
kak_assert(splitedview[6] == "");
Vector<StringView> wrapped = wrap_lines("wrap this paragraph\n respecting whitespaces and much_too_long_words", 16);
kak_assert(wrapped.size() == 6);
kak_assert(wrapped[0] == "wrap this");
kak_assert(wrapped[1] == "paragraph");
kak_assert(wrapped[2] == " respecting");
kak_assert(wrapped[3] == "whitespaces and");
kak_assert(wrapped[4] == "much_too_long_wo");
kak_assert(wrapped[5] == "rds");
Vector<StringView> wrapped2 = wrap_lines("error: unknown type", 7);
kak_assert(wrapped2.size() == 3);
kak_assert(wrapped2[0] == "error:");
kak_assert(wrapped2[1] == "unknown");
kak_assert(wrapped2[2] == "type");
kak_assert(escape("youpi:matin:tchou:", ':', '\\') == "youpi\\:matin\\:tchou\\:");
kak_assert(unescape("youpi\\:matin\\:tchou\\:", ':', '\\') == "youpi:matin:tchou:");
kak_assert(prefix_match("tchou kanaky", "tchou"));
kak_assert(prefix_match("tchou kanaky", "tchou kanaky"));
kak_assert(prefix_match("tchou kanaky", "t"));
kak_assert(not prefix_match("tchou kanaky", "c"));
kak_assert(subsequence_match("tchou kanaky", "tknky"));
kak_assert(subsequence_match("tchou kanaky", "knk"));
kak_assert(subsequence_match("tchou kanaky", "tchou kanaky"));
kak_assert(not subsequence_match("tchou kanaky", "tchou kanaky"));
kak_assert(format("Youhou {1} {} {0} \\{}", 10, "hehe", 5) == "Youhou hehe 5 10 {}");
char buffer[20];
kak_assert(format_to(buffer, "Hey {}", 15) == "Hey 15");
kak_assert(str_to_int("5") == 5);
kak_assert(str_to_int(to_string(INT_MAX)) == INT_MAX);
kak_assert(str_to_int(to_string(INT_MIN)) == INT_MIN);
kak_assert(str_to_int("00") == 0);
kak_assert(str_to_int("-0") == 0);
kak_assert(replace("tchou/tcha/tchi", "/", "!!") == "tchou!!tcha!!tchi");
}};
}

107
src/string.hh
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@ -1,14 +1,11 @@
#ifndef string_hh_INCLUDED
#define string_hh_INCLUDED
#include "array_view.hh"
#include "memory.hh"
#include "hash.hh"
#include "optional.hh"
#include "units.hh"
#include "utf8.hh"
#include "vector.hh"
#include <cstring>
#include <climits>
namespace Kakoune
@ -331,108 +328,6 @@ inline StringView operator"" _sv(const char* str, size_t)
return StringView{str};
}
Vector<String> split(StringView str, char separator, char escape);
Vector<StringView> split(StringView str, char separator);
StringView trim_whitespaces(StringView str);
String escape(StringView str, StringView characters, char escape);
String unescape(StringView str, StringView characters, char escape);
String indent(StringView str, StringView indent = " ");
String replace(StringView str, StringView substr, StringView replacement);
template<typename Container>
String join(const Container& container, char joiner, bool esc_joiner = true)
{
const char to_escape[2] = { joiner, '\\' };
String res;
for (const auto& str : container)
{
if (not res.empty())
res += joiner;
res += esc_joiner ? escape(str, {to_escape, 2}, '\\') : str;
}
return res;
}
inline bool prefix_match(StringView str, StringView prefix)
{
return str.substr(0_byte, prefix.length()) == prefix;
}
bool subsequence_match(StringView str, StringView subseq);
String expand_tabs(StringView line, ColumnCount tabstop, ColumnCount col = 0);
Vector<StringView> wrap_lines(StringView text, ColumnCount max_width);
int str_to_int(StringView str); // throws on error
Optional<int> str_to_int_ifp(StringView str);
inline String option_to_string(StringView opt) { return opt.str(); }
inline void option_from_string(StringView str, String& opt) { opt = str.str(); }
inline bool option_add(String& opt, StringView val) { opt += val; return not val.empty(); }
template<size_t N>
struct InplaceString
{
static_assert(N < 256, "InplaceString cannot handle sizes >= 256");
constexpr operator StringView() const { return {m_data, ByteCount{m_length}}; }
operator String() const { return {m_data, ByteCount{m_length}}; }
unsigned char m_length;
char m_data[N];
};
struct Hex { size_t val; };
constexpr Hex hex(size_t val) { return {val}; }
InplaceString<15> to_string(int val);
InplaceString<23> to_string(long int val);
InplaceString<23> to_string(size_t val);
InplaceString<23> to_string(long long int val);
InplaceString<23> to_string(Hex val);
InplaceString<23> to_string(float val);
InplaceString<7> to_string(Codepoint c);
template<typename RealType, typename ValueType>
decltype(auto) to_string(const StronglyTypedNumber<RealType, ValueType>& val)
{
return to_string((ValueType)val);
}
namespace detail
{
template<typename T> constexpr bool is_string = std::is_convertible<T, StringView>::value;
template<typename T, class = std::enable_if_t<not is_string<T>>>
decltype(auto) format_param(const T& val) { return to_string(val); }
template<typename T, class = std::enable_if_t<is_string<T>>>
StringView format_param(const T& val) { return val; }
}
String format(StringView fmt, ArrayView<const StringView> params);
template<typename... Types>
String format(StringView fmt, Types&&... params)
{
return format(fmt, ArrayView<const StringView>{detail::format_param(std::forward<Types>(params))...});
}
StringView format_to(ArrayView<char> buffer, StringView fmt, ArrayView<const StringView> params);
template<typename... Types>
StringView format_to(ArrayView<char> buffer, StringView fmt, Types&&... params)
{
return format_to(buffer, fmt, ArrayView<const StringView>{detail::format_param(std::forward<Types>(params))...});
}
}
#endif // string_hh_INCLUDED

451
src/string_utils.cc Normal file
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@ -0,0 +1,451 @@
#include "string_utils.hh"
#include "exception.hh"
#include "utf8_iterator.hh"
#include "unit_tests.hh"
namespace Kakoune
{
Vector<String> split(StringView str, char separator, char escape)
{
Vector<String> res;
auto it = str.begin();
auto start = it;
while (it != str.end())
{
res.emplace_back();
String& element = res.back();
while (it != str.end())
{
auto c = *it;
if (c == escape and it + 1 != str.end() and *(it+1) == separator)
{
element += StringView{start, it+1};
element.back() = separator;
it += 2;
start = it;
}
else if (c == separator)
{
element += StringView{start, it};
++it;
start = it;
break;
}
else
++it;
}
}
if (start != str.end())
res.back() += StringView{start, str.end()};
return res;
}
Vector<StringView> split(StringView str, char separator)
{
Vector<StringView> res;
if (str.empty())
return res;
auto beg = str.begin();
for (auto it = beg; it != str.end(); ++it)
{
if (*it == separator)
{
res.emplace_back(beg, it);
beg = it + 1;
}
}
res.emplace_back(beg, str.end());
return res;
}
StringView trim_whitespaces(StringView str)
{
auto beg = str.begin(), end = str.end();
while (beg != end and is_blank(*beg))
++beg;
while (beg != end and is_blank(*(end-1)))
--end;
return {beg, end};
}
String escape(StringView str, StringView characters, char escape)
{
String res;
res.reserve(str.length());
auto cbeg = characters.begin(), cend = characters.end();
for (auto it = str.begin(), end = str.end(); it != end; )
{
auto next = std::find_first_of(it, end, cbeg, cend);
if (next != end)
{
res += StringView{it, next+1};
res.back() = escape;
res += *next;
it = next+1;
}
else
{
res += StringView{it, next};
break;
}
}
return res;
}
String unescape(StringView str, StringView characters, char escape)
{
String res;
res.reserve(str.length());
for (auto it = str.begin(), end = str.end(); it != end; )
{
auto next = std::find(it, end, escape);
if (next != end and next+1 != end and contains(characters, *(next+1)))
{
res += StringView{it, next+1};
res.back() = *(next+1);
it = next + 2;
}
else
{
res += StringView{it, next == end ? next : next + 1};
it = next == end ? next : next + 1;
}
}
return res;
}
String indent(StringView str, StringView indent)
{
String res;
res.reserve(str.length());
bool was_eol = true;
for (ByteCount i = 0; i < str.length(); ++i)
{
if (was_eol)
res += indent;
res += str[i];
was_eol = is_eol(str[i]);
}
return res;
}
String replace(StringView str, StringView substr, StringView replacement)
{
String res;
for (auto it = str.begin(); it != str.end(); )
{
auto match = std::search(it, str.end(), substr.begin(), substr.end());
res += StringView{it, match};
if (match == str.end())
break;
res += replacement;
it = match + (int)substr.length();
}
return res;
}
Optional<int> str_to_int_ifp(StringView str)
{
bool negative = not str.empty() and str[0] == '-';
if (negative)
str = str.substr(1_byte);
unsigned int res = 0;
for (auto c : str)
{
if (c < '0' or c > '9')
return {};
res = res * 10 + c - '0';
}
return negative ? -res : res;
}
int str_to_int(StringView str)
{
if (auto val = str_to_int_ifp(str))
return *val;
throw runtime_error{str + " is not a number"};
}
InplaceString<15> to_string(int val)
{
InplaceString<15> res;
res.m_length = sprintf(res.m_data, "%i", val);
return res;
}
InplaceString<23> to_string(long int val)
{
InplaceString<23> res;
res.m_length = sprintf(res.m_data, "%li", val);
return res;
}
InplaceString<23> to_string(long long int val)
{
InplaceString<23> res;
res.m_length = sprintf(res.m_data, "%lli", val);
return res;
}
InplaceString<23> to_string(size_t val)
{
InplaceString<23> res;
res.m_length = sprintf(res.m_data, "%zu", val);
return res;
}
InplaceString<23> to_string(Hex val)
{
InplaceString<23> res;
res.m_length = sprintf(res.m_data, "%zx", val.val);
return res;
}
InplaceString<23> to_string(float val)
{
InplaceString<23> res;
res.m_length = sprintf(res.m_data, "%f", val);
return res;
}
InplaceString<7> to_string(Codepoint c)
{
InplaceString<7> res;
char* ptr = res.m_data;
utf8::dump(ptr, c);
res.m_length = (int)(ptr - res.m_data);
return res;
}
bool subsequence_match(StringView str, StringView subseq)
{
auto it = str.begin();
for (auto& c : subseq)
{
if (it == str.end())
return false;
while (*it != c)
{
if (++it == str.end())
return false;
}
++it;
}
return true;
}
String expand_tabs(StringView line, ColumnCount tabstop, ColumnCount col)
{
String res;
res.reserve(line.length());
for (auto it = line.begin(), end = line.end(); it != end; )
{
if (*it == '\t')
{
ColumnCount end_col = (col / tabstop + 1) * tabstop;
res += String{' ', end_col - col};
col = end_col;
++it;
}
else
{
auto char_beg = it;
auto cp = utf8::read_codepoint(it, end);
res += {char_beg, it};
col += codepoint_width(cp);
}
}
return res;
}
Vector<StringView> wrap_lines(StringView text, ColumnCount max_width)
{
if (max_width <= 0)
throw runtime_error("Invalid max width");
using Utf8It = utf8::iterator<const char*>;
Utf8It it{text.begin(), text};
Utf8It end{text.end(), text};
Utf8It line_begin = it;
Utf8It last_word_end = it;
Vector<StringView> lines;
while (it != end)
{
const CharCategories cat = categorize(*it, {});
if (cat == CharCategories::EndOfLine)
{
lines.emplace_back(line_begin.base(), it.base());
line_begin = it = it+1;
continue;
}
Utf8It word_end = it+1;
while (word_end != end and categorize(*word_end, {}) == cat)
++word_end;
while (word_end > line_begin and
utf8::column_distance(line_begin.base(), word_end.base()) >= max_width)
{
auto line_end = last_word_end <= line_begin ?
Utf8It{utf8::advance(line_begin.base(), text.end(), max_width), text}
: last_word_end;
lines.emplace_back(line_begin.base(), line_end.base());
while (line_end != end and is_horizontal_blank(*line_end))
++line_end;
if (line_end != end and *line_end == '\n')
++line_end;
it = line_begin = line_end;
}
if (cat == CharCategories::Word or cat == CharCategories::Punctuation)
last_word_end = word_end;
if (word_end > line_begin)
it = word_end;
}
if (line_begin != end)
lines.emplace_back(line_begin.base(), text.end());
return lines;
}
template<typename AppendFunc>
void format_impl(StringView fmt, ArrayView<const StringView> params, AppendFunc append)
{
int implicitIndex = 0;
for (auto it = fmt.begin(), end = fmt.end(); it != end;)
{
auto opening = std::find(it, end, '{');
if (opening == end)
{
append(StringView{it, opening});
break;
}
else if (opening != it and *(opening-1) == '\\')
{
append(StringView{it, opening-1});
append('{');
it = opening + 1;
}
else
{
append(StringView{it, opening});
auto closing = std::find(opening, end, '}');
if (closing == end)
throw runtime_error("Format string error, unclosed '{'");
const int index = (closing == opening + 1) ?
implicitIndex : str_to_int({opening+1, closing});
if (index >= params.size())
throw runtime_error("Format string parameter index too big");
append(params[index]);
implicitIndex = index+1;
it = closing+1;
}
}
}
StringView format_to(ArrayView<char> buffer, StringView fmt, ArrayView<const StringView> params)
{
char* ptr = buffer.begin();
const char* end = buffer.end();
format_impl(fmt, params, [&](StringView s) mutable {
for (auto c : s)
{
if (ptr == end)
throw runtime_error("buffer is too small");
*ptr++ = c;
}
});
if (ptr == end)
throw runtime_error("buffer is too small");
*ptr = 0;
return { buffer.begin(), ptr };
}
String format(StringView fmt, ArrayView<const StringView> params)
{
ByteCount size = fmt.length();
for (auto& s : params) size += s.length();
String res;
res.reserve(size);
format_impl(fmt, params, [&](StringView s) { res += s; });
return res;
}
UnitTest test_string{[]()
{
kak_assert(String("youpi ") + "matin" == "youpi matin");
Vector<String> splited = split("youpi:matin::tchou\\:kanaky:hihi\\:", ':', '\\');
kak_assert(splited[0] == "youpi");
kak_assert(splited[1] == "matin");
kak_assert(splited[2] == "");
kak_assert(splited[3] == "tchou:kanaky");
kak_assert(splited[4] == "hihi:");
Vector<StringView> splitedview = split("youpi:matin::tchou\\:kanaky:hihi\\:", ':');
kak_assert(splitedview[0] == "youpi");
kak_assert(splitedview[1] == "matin");
kak_assert(splitedview[2] == "");
kak_assert(splitedview[3] == "tchou\\");
kak_assert(splitedview[4] == "kanaky");
kak_assert(splitedview[5] == "hihi\\");
kak_assert(splitedview[6] == "");
Vector<StringView> wrapped = wrap_lines("wrap this paragraph\n respecting whitespaces and much_too_long_words", 16);
kak_assert(wrapped.size() == 6);
kak_assert(wrapped[0] == "wrap this");
kak_assert(wrapped[1] == "paragraph");
kak_assert(wrapped[2] == " respecting");
kak_assert(wrapped[3] == "whitespaces and");
kak_assert(wrapped[4] == "much_too_long_wo");
kak_assert(wrapped[5] == "rds");
Vector<StringView> wrapped2 = wrap_lines("error: unknown type", 7);
kak_assert(wrapped2.size() == 3);
kak_assert(wrapped2[0] == "error:");
kak_assert(wrapped2[1] == "unknown");
kak_assert(wrapped2[2] == "type");
kak_assert(escape("youpi:matin:tchou:", ':', '\\') == "youpi\\:matin\\:tchou\\:");
kak_assert(unescape("youpi\\:matin\\:tchou\\:", ':', '\\') == "youpi:matin:tchou:");
kak_assert(prefix_match("tchou kanaky", "tchou"));
kak_assert(prefix_match("tchou kanaky", "tchou kanaky"));
kak_assert(prefix_match("tchou kanaky", "t"));
kak_assert(not prefix_match("tchou kanaky", "c"));
kak_assert(subsequence_match("tchou kanaky", "tknky"));
kak_assert(subsequence_match("tchou kanaky", "knk"));
kak_assert(subsequence_match("tchou kanaky", "tchou kanaky"));
kak_assert(not subsequence_match("tchou kanaky", "tchou kanaky"));
kak_assert(format("Youhou {1} {} {0} \\{}", 10, "hehe", 5) == "Youhou hehe 5 10 {}");
char buffer[20];
kak_assert(format_to(buffer, "Hey {}", 15) == "Hey 15");
kak_assert(str_to_int("5") == 5);
kak_assert(str_to_int(to_string(INT_MAX)) == INT_MAX);
kak_assert(str_to_int(to_string(INT_MIN)) == INT_MIN);
kak_assert(str_to_int("00") == 0);
kak_assert(str_to_int("-0") == 0);
kak_assert(replace("tchou/tcha/tchi", "/", "!!") == "tchou!!tcha!!tchi");
}};
}

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#ifndef string_utils_hh_INCLUDED
#define string_utils_hh_INCLUDED
#include "string.hh"
#include "vector.hh"
#include "optional.hh"
namespace Kakoune
{
Vector<String> split(StringView str, char separator, char escape);
Vector<StringView> split(StringView str, char separator);
StringView trim_whitespaces(StringView str);
String escape(StringView str, StringView characters, char escape);
String unescape(StringView str, StringView characters, char escape);
String indent(StringView str, StringView indent = " ");
String replace(StringView str, StringView substr, StringView replacement);
template<typename Container>
String join(const Container& container, char joiner, bool esc_joiner = true)
{
const char to_escape[2] = { joiner, '\\' };
String res;
for (const auto& str : container)
{
if (not res.empty())
res += joiner;
res += esc_joiner ? escape(str, {to_escape, 2}, '\\') : str;
}
return res;
}
inline bool prefix_match(StringView str, StringView prefix)
{
return str.substr(0_byte, prefix.length()) == prefix;
}
bool subsequence_match(StringView str, StringView subseq);
String expand_tabs(StringView line, ColumnCount tabstop, ColumnCount col = 0);
Vector<StringView> wrap_lines(StringView text, ColumnCount max_width);
int str_to_int(StringView str); // throws on error
Optional<int> str_to_int_ifp(StringView str);
inline String option_to_string(StringView opt) { return opt.str(); }
inline void option_from_string(StringView str, String& opt) { opt = str.str(); }
inline bool option_add(String& opt, StringView val) { opt += val; return not val.empty(); }
template<size_t N>
struct InplaceString
{
static_assert(N < 256, "InplaceString cannot handle sizes >= 256");
constexpr operator StringView() const { return {m_data, ByteCount{m_length}}; }
operator String() const { return {m_data, ByteCount{m_length}}; }
unsigned char m_length;
char m_data[N];
};
struct Hex { size_t val; };
constexpr Hex hex(size_t val) { return {val}; }
InplaceString<15> to_string(int val);
InplaceString<23> to_string(long int val);
InplaceString<23> to_string(size_t val);
InplaceString<23> to_string(long long int val);
InplaceString<23> to_string(Hex val);
InplaceString<23> to_string(float val);
InplaceString<7> to_string(Codepoint c);
template<typename RealType, typename ValueType>
decltype(auto) to_string(const StronglyTypedNumber<RealType, ValueType>& val)
{
return to_string((ValueType)val);
}
namespace detail
{
template<typename T> constexpr bool is_string = std::is_convertible<T, StringView>::value;
template<typename T, class = std::enable_if_t<not is_string<T>>>
decltype(auto) format_param(const T& val) { return to_string(val); }
template<typename T, class = std::enable_if_t<is_string<T>>>
StringView format_param(const T& val) { return val; }
}
String format(StringView fmt, ArrayView<const StringView> params);
template<typename... Types>
String format(StringView fmt, Types&&... params)
{
return format(fmt, ArrayView<const StringView>{detail::format_param(std::forward<Types>(params))...});
}
StringView format_to(ArrayView<char> buffer, StringView fmt, ArrayView<const StringView> params);
template<typename... Types>
StringView format_to(ArrayView<char> buffer, StringView fmt, Types&&... params)
{
return format_to(buffer, fmt, ArrayView<const StringView>{detail::format_param(std::forward<Types>(params))...});
}
}
#endif // string_utils_hh_INCLUDED