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https://github.com/c3lang/c3c.git
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456 lines
9.5 KiB
C
456 lines
9.5 KiB
C
module std::io;
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import std::collections::map;
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import libc;
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const int PRINTF_NTOA_BUFFER_SIZE = 256;
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fn String any.to_string(void* value, Allocator *using) @interface;
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fn usz! any.to_format(void* value, Formatter* formatter) @interface;
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fault PrintFault
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{
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BUFFER_EXCEEDED,
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INTERNAL_BUFFER_EXCEEDED,
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INVALID_FORMAT_STRING,
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MISSING_ARG,
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INVALID_ARGUMENT_TYPE,
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}
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fault FormattingFault
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{
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UNTERMINATED_FORMAT,
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MISSING_ARG,
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INVALID_WIDTH_ARG,
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INVALID_FORMAT_TYPE,
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}
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def OutputFn = fn void!(void* buffer, char c);
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def FloatType = double;
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fn usz! Formatter.printf(&self, String format, args...)
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{
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return self.vprintf(format, args) @inline;
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}
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struct Formatter
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{
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void *data;
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OutputFn out_fn;
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struct
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{
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PrintFlags flags;
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uint width;
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uint prec;
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usz idx;
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}
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}
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bitstruct PrintFlags : uint
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{
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bool zeropad;
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bool left;
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bool plus;
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bool space;
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bool hash;
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bool uppercase;
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bool precision;
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}
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fn void Formatter.init(&self, OutputFn out_fn, void* data = null)
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{
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*self = { .data = data, .out_fn = out_fn};
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}
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fn usz! Formatter.out(&self, char c) @private
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{
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self.out_fn(self.data, c)!;
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return 1;
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}
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macro usz! Formatter.print_with_function(&self, any arg)
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{
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if (&arg.to_format)
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{
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PrintFlags old = self.flags;
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uint old_width = self.width;
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uint old_prec = self.prec;
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defer
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{
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self.flags = old;
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self.width = old_width;
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self.prec = old_prec;
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}
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return arg.to_format(self);
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}
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if (&arg.to_string)
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{
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PrintFlags old = self.flags;
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uint old_width = self.width;
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uint old_prec = self.prec;
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defer
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{
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self.flags = old;
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self.width = old_width;
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self.prec = old_prec;
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}
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@pool()
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{
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return self.out_substr(arg.to_string(mem::temp()));
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};
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}
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return SearchResult.MISSING?;
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}
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fn usz! Formatter.out_str(&self, any arg) @private
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{
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switch (arg.type.kindof)
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{
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case TYPEID:
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return self.out_substr("typeid");
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case VOID:
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return self.out_substr("void");
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case ANYFAULT:
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case FAULT:
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return self.out_substr((*(anyfault*)arg.ptr).nameof);
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case ANY:
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return self.out_str(*(any*)arg);
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case OPTIONAL:
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unreachable();
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case SIGNED_INT:
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case UNSIGNED_INT:
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PrintFlags flags = self.flags;
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uint width = self.width;
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defer
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{
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self.flags = flags;
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self.width = width;
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}
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self.flags = {};
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self.width = 0;
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return self.ntoa_any(arg, 10);
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case FLOAT:
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PrintFlags flags = self.flags;
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uint width = self.width;
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defer
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{
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self.flags = flags;
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self.width = width;
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}
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self.flags = {};
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self.width = 0;
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return self.ftoa(float_from_any(arg)!!);
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case BOOL:
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return self.out_substr(*(bool*)arg.ptr ? "true" : "false");
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default:
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}
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usz! n = self.print_with_function(arg);
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if (catch err = n)
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{
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case SearchResult.MISSING:
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break;
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default:
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return err?;
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} else {
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return n;
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}
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switch (arg.type.kindof)
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{
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case ENUM:
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usz i = types::any_to_int(arg, usz)!!;
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assert(i < arg.type.names.len, "Illegal enum value found, numerical value was %d.", i);
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return self.out_substr(arg.type.names[i]);
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case STRUCT:
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return self.out_substr("<struct>");
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case UNION:
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return self.out_substr("<union>");
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case BITSTRUCT:
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return self.out_substr("<bitstruct>");
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case FUNC:
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return self.out_substr("<function>");
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case DISTINCT:
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if (arg.type == ZString.typeid)
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{
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return self.out_substr(((ZString*)arg).str_view());
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}
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if (arg.type == DString.typeid)
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{
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return self.out_substr(((DString*)arg).str_view());
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}
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return self.out_str(any { arg.ptr, arg.type.inner });
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case POINTER:
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PrintFlags flags = self.flags;
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uint width = self.width;
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defer
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{
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self.flags = flags;
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self.width = width;
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}
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self.flags = {};
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self.width = 0;
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return self.ntoa_any(arg, 16);
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case ARRAY:
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// this is SomeType[*] so grab the "SomeType"
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PrintFlags flags = self.flags;
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uint width = self.width;
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defer
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{
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self.flags = flags;
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self.width = width;
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}
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self.flags = {};
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self.width = 0;
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typeid inner = arg.type.inner;
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usz size = inner.sizeof;
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usz alen = arg.type.len;
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// Pretend this is a String
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void* ptr = (void*)arg.ptr;
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usz len = self.out('[')!;
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for (usz i = 0; i < alen; i++)
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{
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if (i != 0) len += self.out_substr(", ")!;
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len += self.out_str(any { ptr, inner })!;
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ptr += size;
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}
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len += self.out(']')!;
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return len;
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case VECTOR:
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PrintFlags flags = self.flags;
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uint width = self.width;
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defer
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{
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self.flags = flags;
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self.width = width;
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}
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self.flags = {};
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self.width = 0;
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// this is SomeType[*] so grab the "SomeType"
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typeid inner = arg.type.inner;
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usz size = inner.sizeof;
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usz vlen = arg.type.len;
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// Pretend this is a String
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void* ptr = (void*)arg.ptr;
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usz len = self.out_substr("[<")!;
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for (usz i = 0; i < vlen; i++)
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{
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if (i != 0) len += self.out_substr(", ")!;
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len += self.out_str(any { ptr, inner })!;
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ptr += size;
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}
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len += self.out_substr(">]")!;
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return len;
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case SUBARRAY:
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// this is SomeType[] so grab the "SomeType"
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typeid inner = arg.type.inner;
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if (inner == char.typeid)
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{
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return self.out_substr(*(String*)arg);
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}
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if (inner == void.typeid) inner = char.typeid;
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PrintFlags flags = self.flags;
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uint width = self.width;
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defer
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{
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self.flags = flags;
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self.width = width;
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}
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self.flags = {};
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self.width = 0;
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usz size = inner.sizeof;
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// Pretend this is a String
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String* temp = (void*)arg.ptr;
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void* ptr = (void*)temp.ptr;
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usz slen = temp.len;
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usz len = self.out('[')!;
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for (usz i = 0; i < slen; i++)
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{
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if (i != 0) len += self.out_substr(", ")!;
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len += self.out_str(any { ptr, inner })!;
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ptr += size;
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}
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len += self.out(']')!;
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return len;
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default:
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}
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return self.out_substr("Invalid type");
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}
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fn void! out_null_fn(void* data @unused, char c @unused) @private
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{
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}
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fn usz! Formatter.vprintf(&self, String format, any[] anys)
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{
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if (!self.out_fn)
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{
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// use null output function
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self.out_fn = &out_null_fn;
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}
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usz total_len;
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usz format_len = format.len;
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usz variant_index = 0;
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for (usz i = 0; i < format_len; i++)
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{
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// format specifier? %[flags][width][.precision][length]
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char c = format[i];
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if (c != '%')
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{
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// no
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total_len += self.out(c)!;
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continue;
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}
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i++;
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if (i >= format_len) return PrintFault.INVALID_FORMAT_STRING?;
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c = format[i];
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if (c == '%')
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{
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total_len += self.out(c)!;
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continue;
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}
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// evaluate flags
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self.flags = {};
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while FLAG_EVAL: (true)
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{
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switch (c)
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{
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case '0': self.flags.zeropad = true;
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case '-': self.flags.left = true;
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case '+': self.flags.plus = true;
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case ' ': self.flags.space = true;
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case '#': self.flags.hash = true;
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default: break FLAG_EVAL;
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}
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if (++i >= format_len) return PrintFault.INVALID_FORMAT_STRING?;
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c = format[i];
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}
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// evaluate width field
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int w = printf_parse_format_field(anys.ptr, anys.len, &variant_index, format.ptr, format.len, &i)!;
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c = format[i];
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if (w < 0)
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{
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self.flags.left = true;
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w = -w;
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}
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self.width = w;
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// evaluate precision field
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self.prec = 0;
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if (c == '.')
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{
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self.flags.precision = true;
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if (++i >= format_len) return PrintFault.INVALID_FORMAT_STRING?;
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int prec = printf_parse_format_field(anys.ptr, anys.len, &variant_index, format.ptr, format.len, &i)!;
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self.prec = prec < 0 ? 0 : prec;
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c = format[i];
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}
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// evaluate specifier
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uint base = 0;
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if (variant_index >= anys.len) return PrintFault.MISSING_ARG?;
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any current = anys[variant_index++];
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switch (c)
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{
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case 'd':
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base = 10;
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self.flags.hash = false;
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case 'X' :
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self.flags.uppercase = true;
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nextcase;
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case 'x' :
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base = 16;
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case 'O':
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self.flags.uppercase = true;
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nextcase;
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case 'o' :
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base = 8;
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case 'B':
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self.flags.uppercase = true;
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nextcase;
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case 'b' :
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base = 2;
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case 'A':
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self.flags.uppercase = true;
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nextcase;
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case 'a':
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total_len += self.atoa(float_from_any(current)!!)!;
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continue;
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case 'F' :
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self.flags.uppercase = true;
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nextcase;
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case 'f':
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total_len += self.ftoa(float_from_any(current)!!)!;
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continue;
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case 'E':
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self.flags.uppercase = true;
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nextcase;
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case 'e':
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total_len += self.etoa(float_from_any(current)!!)!;
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continue;
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case 'G':
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self.flags.uppercase = true;
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nextcase;
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case 'g':
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total_len += self.gtoa(float_from_any(current)!!)!;
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continue;
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case 'c':
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total_len += self.out_char(current)!;
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continue;
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case 's':
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if (self.flags.left)
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{
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usz len = self.out_str(current)!;
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total_len += len;
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total_len += self.pad(' ', self.width, len)!;
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continue;
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}
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OutputFn out_fn = self.out_fn;
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self.out_fn = (OutputFn)&out_null_fn;
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usz len = self.out_str(current)!;
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self.out_fn = out_fn;
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total_len += self.pad(' ', self.width, len)!;
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total_len += self.out_str(current)!;
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continue;
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case 'p':
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self.flags.zeropad = true;
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self.flags.hash = true;
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base = 16;
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default:
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return PrintFault.INVALID_FORMAT_STRING?;
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}
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if (base != 10)
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{
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self.flags.plus = false;
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self.flags.space = false;
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}
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// ignore '0' flag when precision is given
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if (self.flags.precision) self.flags.zeropad = false;
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bool is_neg;
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uint128 v = int_from_any(current, &is_neg)!!;
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total_len += self.ntoa(v, is_neg, base)!;
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}
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// termination
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// out((char)0, buffer, idx < maxlen ? idx : maxlen - 1U, maxlen);
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// return written chars without terminating \0
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return total_len;
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}
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fn usz! Formatter.print(&self, String str)
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{
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if (!self.out_fn)
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{
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// use null output function
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self.out_fn = &out_null_fn;
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}
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foreach (c : str) self.out(c)!;
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return self.idx;
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} |