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premiere-libtorrent
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string operations optimizations in client_test

This commit is contained in:
Arvid Norberg 2007-05-23 07:39:21 +00:00
parent 3a27e51720
commit 4bcf8b53ff
1 changed files with 31 additions and 24 deletions
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55
examples/client_test.cpp
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@ -147,17 +147,18 @@ void clear_home()
#endif
std::string esc(char const* code)
char const* esc(char const* code)
{
static char ret[20] = "\033[";
#ifdef ANSI_TERMINAL_COLORS
std::string ret;
ret += char(0x1b);
ret += "[";
ret += code;
ret += "m";
int i = 2;
int j = 0;
while (code[j]) ret[i++] = code[j++];
ret[i++] = 'm';
ret[i++] = 0;
return ret;
#else
return std::string();
return "";
#endif
}
@ -171,15 +172,13 @@ std::string to_string(int v, int width)
return s.str();
}
std::string to_string(float v, int width, int precision = 3)
std::string const& to_string(float v, int width, int precision = 3)
{
std::stringstream s;
s.precision(precision);
s.flags(std::ios_base::right);
s.width(width);
s.fill(' ');
s << v;
return s.str();
static std::string ret;
ret.resize(20);
int size = std::sprintf(&ret[0], "%*.*f", width, precision, v);
ret.resize(std::min(size, width));
return ret;
}
std::string pos_to_string(float v, int width, int precision = 4)
@ -214,30 +213,38 @@ std::string ratio(float a, float b)
return s.str();
}
std::string add_suffix(float val)
std::string const& add_suffix(float val)
{
const char* prefix[] = {"B", "kB", "MB", "GB", "TB"};
static std::string ret;
const char* prefix[] = {"kB", "MB", "GB", "TB"};
const int num_prefix = sizeof(prefix) / sizeof(const char*);
for (int i = 0; i < num_prefix; ++i)
{
if (fabs(val) < 1000.f)
return to_string(val, i==0?5:4) + prefix[i];
val /= 1000.f;
if (fabs(val) < 1000.f)
{
ret = to_string(val, 4);
ret += prefix[i];
return ret;
}
return to_string(val, 6) + "PB";
}
ret = to_string(val, 4);
ret += "PB";
return ret;
}
std::string progress_bar(float progress, int width, char const* code = "33")
std::string const& progress_bar(float progress, int width, char const* code = "33")
{
std::string bar;
bar.reserve(width);
static std::string bar;
bar.clear();
bar.reserve(width + 10);
int progress_chars = static_cast<int>(progress * width + .5f);
bar = esc(code);
std::fill_n(std::back_inserter(bar), progress_chars, '#');
bar += esc("0");
std::fill_n(std::back_inserter(bar), width - progress_chars, '-');
return std::string(bar.begin(), bar.end());
return bar;
}
int peer_index(libtorrent::tcp::endpoint addr, std::vector<libtorrent::peer_info> const& peers)