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@ -18,21 +18,15 @@ |
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*/ |
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/** |
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D standard library formatting functions turned out to be |
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too slow for big data processing, while standard C functions |
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are very fast. This module contains set of functions for |
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building strings in memory and outputting them into a file. |
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For outputting to file, FILE* pointers are supported. |
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For building strings in memory, provide char[] array or char* |
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pointer when you're sure that amount of preallocated memory |
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is enough to store string representation. |
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In case char* is used, it is passed by reference, and the pointer |
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is updated during string building. |
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Use pointer version when it allows you to get better performance, |
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but remember that it's quite dangerous. |
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$(P This module provides fast formatting functions.) |
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$(P Each function has two overloads: |
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$(UL |
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$(LI $(D ref char*) - in this case, function starts |
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writing at the location, and updates the pointer. |
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No checks are done, it's user's responsibility that this is safe.) |
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$(LI $(D scope void delegate(const(char)[])) - formatted data |
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is passed to the delegate for further processing.))) |
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*/ |
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module bio.core.utils.format; |
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@ -41,105 +35,10 @@ import std.c.stdlib; |
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import std.string; |
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import std.traits; |
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import std.array; |
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/// Used for building a string in a buffer or for outputting to stream.
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size_t append(Args...)(FILE* stream, string format, Args args) |
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{ |
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auto _format = toStringz(format); |
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return fprintf(stream, _format, args); |
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} |
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/// ditto
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size_t append(Args...)(ref char* stream, string format, Args args) { |
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auto _format = toStringz(format); |
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auto sz = sprintf(stream, _format, args); |
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stream += sz; |
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return sz; |
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} |
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/// ditto
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size_t append(Args...)(ref char[] stream, string format, Args args) |
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{ |
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char[1024] buffer; |
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int count; |
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auto f = toStringz(format); |
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auto p = buffer.ptr; |
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auto psize = buffer.length; |
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for (;;) |
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{ |
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version(Win32) |
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{ |
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count = _snprintf(p,psize,f,args); |
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if (count != -1) |
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break; |
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psize *= 2; |
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p = cast(char *) alloca(psize); |
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} |
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version(Posix) |
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{ |
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count = snprintf(p,psize,f,args); |
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if (count == -1) |
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psize *= 2; |
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else if (count >= psize) |
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psize = count + 1; |
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else |
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break; |
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p = cast(char *) alloca(psize); |
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} |
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} |
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stream ~= p[0 .. count]; |
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return count; |
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} |
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/// Put char into a stream
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size_t putcharacter(FILE* stream, char c) |
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{ |
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fputc(c, stream); |
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return 1; |
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} |
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/// Append char to a buffer
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size_t putcharacter(ref char[] stream, char c) |
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{ |
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stream ~= c; |
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return 1; |
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} |
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/// ditto
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size_t putcharacter(ref char* stream, char c) { |
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*stream++ = c; |
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return 1; |
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} |
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/// Append string to output stream.
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size_t putstring(T)(FILE* stream, T[] s) |
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if (is(Unqual!T == char)) |
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{ |
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fwrite(s.ptr, s.length, char.sizeof, stream); |
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return s.length; |
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} |
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/// Append string to a buffer
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size_t putstring(T)(ref char[] stream, T[] s) |
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if (is(Unqual!T == char)) |
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{ |
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stream ~= s; |
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return s.length; |
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} |
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/// ditto
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size_t putstring(T)(ref char* stream, T[] s) |
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if (is(Unqual!T == char)) |
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{ |
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stream[0 .. s.length] = s; |
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stream += s.length; |
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return s.length; |
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} |
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import std.math; |
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private { |
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/// Reverses closed interval [begin .. end]
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// Reverses closed interval [begin .. end]
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void strreverse(char* begin, char* end) |
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{ |
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char aux; |
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@ -147,9 +46,9 @@ private { |
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aux = *end, *end-- = *begin, *begin++ = aux; |
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} |
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/// Prints $(D value) at the address where $(D str) points to.
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/// Returns number of characters written.
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auto itoa(T)(T value, char* str) |
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// Prints $(D value) at the address where $(D str) points to.
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// Returns number of characters written.
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size_t itoa(T)(T value, char* str) |
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{ |
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char* wstr=str; |
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@ -173,150 +72,237 @@ private { |
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} |
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} |
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/// Put integer number into a stream
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size_t putinteger(T)(FILE* stream, T number) |
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if (isIntegral!T) |
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{ |
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char[64] buf; |
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auto len = itoa(number, buf.ptr); |
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fwrite(buf.ptr, len, char.sizeof, stream); |
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return len; |
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} |
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/// Add string representation of an integer to a buffer
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size_t putinteger(T)(ref char[] stream, T number) |
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if (isIntegral!T) |
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{ |
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char[64] buf; |
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auto len = itoa(number, buf.ptr); |
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stream ~= buf[0 .. len]; |
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return len; |
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} |
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/// ditto
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size_t putinteger(T)(ref char* stream, T number) { |
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auto len = itoa(number, stream); |
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stream += len; |
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return len; |
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///
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template isSomeSink(T) { |
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static if (is(T == void delegate(const(char)[]))) |
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enum isSomeSink = true; |
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else static if (is(T == char*)) |
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enum isSomeSink = true; |
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else |
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enum isSomeSink = false; |
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} |
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unittest { |
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char[] buf; |
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append(buf, "%d%g", 1, 2.4); |
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assert(cast(string)(buf) == "12.4"); |
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private { |
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void writeFloat(T)(ref char* sink, T number) |
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if (isFloatingPoint!T) |
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{ |
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char[4] format; |
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format[0] = '%'; |
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format[1] = 'g'; |
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format[2] = '\0'; |
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sink += sprintf(sink, format.ptr, number); |
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} |
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append(buf, "%s", toStringz("k")); |
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assert(cast(string)(buf) == "12.4k"); |
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void writeFloat(T)(scope void delegate(const(char)[]) sink, T number) |
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if (isFloatingPoint!T) |
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{ |
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char[1024] buffer = void; |
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int count; |
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auto str = "m"; |
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append(buf, "%.*s", str.length, str.ptr); |
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assert(cast(string)(buf) == "12.4km"); |
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auto p = buffer.ptr; |
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auto psize = buffer.length; |
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for (;;) |
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{ |
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version(Win32) |
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{ |
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count = _snprintf(p,psize,"%g", cast(double)number); |
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if (count != -1) |
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break; |
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psize *= 2; |
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p = cast(char *) alloca(psize); |
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} |
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version(Posix) |
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{ |
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count = snprintf(p,psize,"%g", cast(double)number); |
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if (count == -1) |
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psize *= 2; |
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else if (count >= psize) |
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psize = count + 1; |
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else |
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break; |
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p = cast(char *) alloca(psize); |
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} |
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} |
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append(buf, "%c%c", '/', 'h'); |
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assert(cast(string)(buf) == "12.4km/h"); |
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sink(p[0 .. count]); |
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} |
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ushort k = 5; |
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append(buf, "%d", k); |
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assert(cast(char)(buf[$-1]) == '5'); |
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void writeInteger(T)(ref char* sink, T integer) |
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if (isIntegral!T) |
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{ |
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sink += itoa(integer, sink); |
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} |
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buf.length = 0; |
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putstring(buf, "tes"); |
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putcharacter(buf, 't'); |
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void writeInteger(T)(scope void delegate(const(char)[]) sink, T integer) |
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if (isIntegral!T) |
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{ |
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char[32] buf = void; |
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auto len = itoa(integer, buf.ptr); |
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sink(buf[0 .. len]); |
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} |
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uint z = 345; |
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append(buf, "%d", z); |
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void writeChar(T)(ref char* sink, T c) |
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if (isSomeChar!T) |
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{ |
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*sink++ = c; |
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} |
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assert(cast(string)(buf) == "test345"); |
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void writeChar(T)(scope void delegate(const(char)[]) sink, T c) |
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if (isSomeChar!T) |
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{ |
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sink((&c)[0 .. 1]); |
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} |
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buf.length = 0; |
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putinteger(buf, 25); |
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assert(cast(string)(buf) == "25"); |
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putinteger(buf, -31); |
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assert(cast(string)(buf) == "25-31"); |
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void writeString(T)(ref char* sink, T s) |
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if (isSomeString!T) |
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{ |
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auto str = cast(const(char)[])s; |
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memcpy(sink, str.ptr, str.length); |
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sink += str.length; |
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} |
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char* s = cast(char*)malloc(100); |
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scope(exit) free(s); |
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void writeString(T)(scope void delegate(const(char)[]) sink, T s) |
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if (isSomeString!T) |
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{ |
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sink(cast(const(char)[])s); |
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} |
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char* p = s; |
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putstring(p, "123"); |
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putinteger(p, 456); |
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putcharacter(p, '7'); |
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append(p, "%g", 8.9); |
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assert(s[0 .. p - s] == "12345678.9"); |
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} |
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void writeImpl(Sink, T)(auto ref Sink sink, T value) |
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if (isSomeSink!Sink) |
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{ |
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static if (isIntegral!T) |
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writeInteger(sink, value); |
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else static if (isFloatingPoint!T) |
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writeFloat(sink, value); |
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else static if (isSomeChar!T) |
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writeChar(sink, value); |
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else static if (isSomeString!T) |
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writeString(sink, value); |
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else static assert(false, |
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"only integers, floats, chars and strings are supported"); |
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} |
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void putFloat(T)(scope void delegate(const(char)[]) sink, T number) |
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if (isFloatingPoint!T) |
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{ |
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char[1024] buffer = void; |
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int count; |
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// -------------------- JSON output utils ----------------------------------
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auto p = buffer.ptr; |
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auto psize = buffer.length; |
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for (;;) |
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// JSON doesn't support NaN and +/- infinity.
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// Therefore the approach taken here is to represent
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// infinity as 1.0e+1024, and NaN as null.
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void writeFloatJson(Sink, T)(auto ref Sink sink, T value) |
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if (isFloatingPoint!T) |
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{ |
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version(Win32) |
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{ |
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count = _snprintf(p,psize,"%g", cast(double)number); |
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if (count != -1) |
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break; |
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psize *= 2; |
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p = cast(char *) alloca(psize); |
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if (isFinite(value)) { |
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sink.write(value); |
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} else { |
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if (value == float.infinity) { |
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sink.write("1.0e+1024"); |
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} else if (value == -float.infinity) { |
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sink.write("-1.0e+1024"); |
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} else if (isNaN(value)) { |
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sink.write("null"); |
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} else { |
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assert(0); |
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} |
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} |
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|
|
version(Posix) |
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|
{ |
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|
|
count = snprintf(p,psize,"%g", cast(double)number); |
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|
if (count == -1) |
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|
psize *= 2; |
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|
else if (count >= psize) |
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|
psize = count + 1; |
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|
else |
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|
break; |
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|
p = cast(char *) alloca(psize); |
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} |
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|
|
immutable char[256] specialCharacterTable = [ |
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|
|
/* 0-15 */ 0,0, 0,0,0,0,0,0, 'b','t','n',0, 'f','r',0, 0, |
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|
/* 16-31 */ 0,0, 0,0,0,0,0,0, 0, 0, 0,0, 0, 0,0, 0, |
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|
/* 32-47 */ 0,0,'"',0,0,0,0,0, 0, 0, 0,0, 0, 0,0, 0, |
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/* 48-63 */ 0,0, 0,0,0,0,0,0, 0, 0, 0,0, 0, 0,0,'/', |
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|
/* 64-79 */ 0,0, 0,0,0,0,0,0, 0, 0, 0,0, 0, 0,0, 0, |
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|
/* 80-95 */ 0,0, 0,0,0,0,0,0, 0, 0, 0,0,'\\', 0,0, 0, |
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/* 96-111 */ 0,0, 0,0,0,0,0,0, 0, 0, 0,0, 0, 0,0, 0, |
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/* 112-127 */ 0,0, 0,0,0,0,0,0, 0, 0, 0,0, 0, 0,0, 0, |
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0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
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0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
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0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
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0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
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|
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
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|
|
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
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|
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, |
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|
|
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0 |
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|
]; |
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|
|
|
|
|
void writeStringJson(Sink, T)(auto ref Sink sink, T s) |
|
|
|
if (isSomeString!T) |
|
|
|
{ |
|
|
|
sink.write('"'); |
|
|
|
foreach (char c; s) { |
|
|
|
auto sc = specialCharacterTable[cast(ubyte)c]; |
|
|
|
if (sc == 0) { |
|
|
|
sink.write(c); |
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|
|
} else { |
|
|
|
sink.write('\\'); |
|
|
|
sink.write(sc); |
|
|
|
} |
|
|
|
} |
|
|
|
sink.write('"'); |
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|
|
} |
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sink(p[0 .. count]); |
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} |
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void writeCharJson(Sink, T)(auto ref Sink sink, T c) |
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if (isSomeChar!T) |
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{ |
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sink.writeStringJson((&c)[0 .. 1]); |
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} |
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void putInteger(T)(scope void delegate(const(char)[]) sink, T integer) |
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if (isIntegral!T) |
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{ |
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char[64] buf = void; |
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auto len = itoa(integer, buf.ptr); |
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sink(buf[0 .. len]); |
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} |
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void writeArrayJson(Sink, T)(auto ref Sink sink, T array) |
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if (isArray!T && __traits(compiles, sink.writeJson(array[0]))) |
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{ |
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if (array.length == 0) { |
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sink.write("[]"); |
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return; |
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} |
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void putChar(T)(scope void delegate(const(char)[]) sink, T c) |
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if (isSomeChar!T) |
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{ |
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char[1] buf = void; |
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buf[0] = c; |
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sink(buf[0 .. 1]); |
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} |
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sink.write('['); |
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foreach (elem; array[0 .. $ - 1]) { |
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sink.writeJson(elem); |
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sink.write(','); |
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} |
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sink.writeJson(array[$ - 1]); |
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sink.write(']'); |
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} |
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void put(T)(scope void delegate(const(char)[]) sink, T value) { |
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static if (isIntegral!T) |
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putInteger(sink, value); |
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else static if (isFloatingPoint!T) |
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putFloat(sink, value); |
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else static if (isSomeChar!T) |
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putChar(sink, value); |
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else static if (isSomeString!T) |
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sink(cast(const(char)[])value); |
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else static assert(false); |
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void writeJsonImpl(Sink, T)(auto ref Sink sink, T value) |
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if (isSomeSink!Sink) |
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{ |
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static if (isIntegral!T) |
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writeInteger(sink, value); |
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else static if (isFloatingPoint!T) |
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writeFloatJson(sink, value); |
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else static if (isSomeChar!T) |
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writeCharJson(sink, value); |
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else static if (isSomeString!T) |
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writeStringJson(sink, value); |
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else static if (isArray!T && __traits(compiles, sink.writeJsonImpl(value[0]))) |
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writeArrayJson(sink, value); |
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else static assert(false, |
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"only numbers, chars, strings and arrays are supported"); |
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} |
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} |
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void putArray(T, U)(scope void delegate(const(char)[]) sink, T array, U delimiter) |
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if (isArray!T && (isSomeChar!U || isSomeString!U) && __traits(compiles, put(sink, array[0]))) |
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///
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void write(T)(ref char* sink, T value) { writeImpl(sink, value); } |
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///
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void write(T)(scope void delegate(const(char)[]) sink, T value) { writeImpl(sink, value); } |
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///
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void writeArray(Sink, T, U)(auto ref Sink sink, T array, U delimiter) |
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if (isSomeSink!Sink && isArray!T && (isSomeChar!U || isSomeString!U) && |
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|
__traits(compiles, sink.write(array[0]))) |
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|
{ |
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|
|
if (array.length == 0) |
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|
return; |
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|
foreach (elem; array[0 .. $ - 1]) { |
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|
sink.put(elem); |
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|
sink.put(delimiter); |
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|
sink.write(elem); |
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|
sink.write(delimiter); |
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} |
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sink.put(array[$ - 1]); |
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|
sink.write(array[$ - 1]); |
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} |
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/// Supports numbers, strings, and arrays. No dictionary - because D doesn't have a good one.
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void writeJson(T)(ref char* sink, T value) { writeJsonImpl(sink, value); } |
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|
/// ditto
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void writeJson(T)(scope void delegate(const(char)[]) sink, T value) { writeJsonImpl(sink, |
lomereiter
9 years ago