mirror of
https://github.com/c3lang/c3c.git
synced 2026-02-27 12:01:16 +00:00
25bccf4883
- Remove `[?]` syntax. - Change `int!` to `int?` syntax. - New `fault` declarations. - Enum associated values can reference the calling enum.
562 lines
13 KiB
Plaintext
562 lines
13 KiB
Plaintext
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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interface Printable
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{
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fn String to_constant_string() @optional;
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fn usz? to_format(Formatter* formatter) @optional;
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}
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fault BUFFER_EXCEEDED, INTERNAL_BUFFER_EXCEEDED, INVALID_FORMAT, NOT_ENOUGH_ARGUMENTS,
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INVALID_ARGUMENT;
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def OutputFn = fn void?(void* buffer, char c);
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def FloatType = double;
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macro bool is_struct_with_default_print($Type)
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{
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return $Type.kindof == STRUCT
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&&& !$defined($Type.to_format)
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&&& !$defined($Type.to_constant_string);
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}
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<*
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Introspect a struct and print it to a formatter
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@require @typekind(value) == STRUCT : `This macro is only valid on macros`
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*>
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macro usz? struct_to_format(value, Formatter* f, bool $force_dump)
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{
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var $Type = $typeof(value);
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usz total = f.print("{ ")!;
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$foreach $i, $member : $Type.membersof:
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$if $i > 0:
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total += f.print(", ")!;
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$endif
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$if $member.nameof != "":
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total += f.printf("%s: ", $member.nameof)!;
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$endif
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$if ($force_dump &&& $member.typeid.kindof == STRUCT) |||
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is_struct_with_default_print($typefrom($member.typeid)):
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total += struct_to_format($member.get(value), f, $force_dump)!;
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$else
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total += f.printf("%s", $member.get(value))!;
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$endif
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$endforeach
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return total + f.print(" }");
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}
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fn usz? ReflectedParam.to_format(&self, Formatter* f) @dynamic
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{
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return f.printf("[Parameter '%s']", self.name);
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}
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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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anyfault first_fault;
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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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if (catch err = self.out_fn(self.data, c))
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{
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if (self.first_fault) return self.first_fault?;
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self.first_fault = err;
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return err?;
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}
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return 1;
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}
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fn usz? Formatter.print_with_function(&self, Printable 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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if (!arg) return self.out_substr("(null)");
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return arg.to_format(self);
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}
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if (&arg.to_constant_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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if (!arg) return self.out_substr("(null)");
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return self.out_substr(arg.to_constant_string());
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}
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return NOT_FOUND?;
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}
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fn usz? Formatter.out_unknown(&self, String category, any arg) @private
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{
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return self.out_substr("[") + self.out_substr(category) + self.out_substr(" type:") + self.ntoa((iptr)arg.type, false, 16) + self.out_substr(", addr:") + self.ntoa((iptr)arg.ptr, false, 16) + self.out_substr("]");
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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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return self.out_substr((*(anyfault*)arg.ptr).nameof);
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case INTERFACE:
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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) ?? self.out_substr("<INVALID>");
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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)) ?? self.out_substr("ERR");
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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((Printable)arg);
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if (try n) return n;
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if (@catch(n) != NOT_FOUND) n!;
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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_enum_ordinal(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_unknown("struct", arg);
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case UNION:
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return self.out_unknown("union", arg);
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case BITSTRUCT:
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return self.out_unknown("bitstruct", arg);
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case FUNC:
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return self.out_unknown("function", arg);
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case DISTINCT:
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if (arg.type == String.typeid)
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{
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return self.out_substr(*(String*)arg);
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}
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if (arg.type == ZString.typeid)
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{
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return self.out_substr(*(ZString*)arg ? ((ZString*)arg).str_view() : "(null)");
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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 ? ((DString*)arg).str_view() : "(null)");
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}
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return self.out_str(arg.as_inner());
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case POINTER:
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typeid inner = arg.type.inner;
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void** pointer = arg.ptr;
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if (arg.type.inner != void.typeid)
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{
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any deref = any_make(*pointer, inner);
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n = self.print_with_function((Printable)deref);
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if (try n) return n;
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if (@catch(n) != NOT_FOUND) n!;
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}
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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.width = 0;
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return self.out_substr("0x")! + 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_make(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_make(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 SLICE:
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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 == 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_make(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 ANY:
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case INTERFACE:
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unreachable("Already handled");
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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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macro usz? @report_fault(Formatter* f, $fault)
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{
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(void)f.out_substr($fault);
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return INVALID_FORMAT?;
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}
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macro usz? @wrap_bad(Formatter* f, #action)
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{
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usz? len = #action;
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if (catch err = len)
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{
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switch (err)
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{
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case BUFFER_EXCEEDED:
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case INTERNAL_BUFFER_EXCEEDED:
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return f.first_err(err)?;
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default:
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err = f.first_err(INVALID_ARGUMENT);
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f.out_substr("<INVALID>")!;
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return err?;
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}
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}
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return len;
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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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self.first_fault = {};
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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 @report_fault(self, "%ERR");
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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 @report_fault(self, "%ERR");
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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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if (catch w) return @report_fault(self, "%ERR");
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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 @report_fault(self, "<BAD FORMAT>");
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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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if (catch prec) return @report_fault(self, "<BAD FORMAT>");
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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)
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{
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self.first_err(NOT_ENOUGH_ARGUMENTS);
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total_len += self.out_substr("<MISSING>")!;
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continue;
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}
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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 += @wrap_bad(self, 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 += @wrap_bad(self, 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 += @wrap_bad(self, 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 += @wrap_bad(self, 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 'H':
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self.flags.uppercase = true;
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nextcase;
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case 'h':
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char[] out @noinit;
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switch (current.type)
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{
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case char[]:
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case ichar[]:
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out = *(char[]*)current;
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default:
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if (current.type.kindof == ARRAY && (current.type.inner == char.typeid || current.type.inner == ichar.typeid))
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{
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out = ((char*)current.ptr)[:current.type.sizeof];
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break;
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}
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total_len += self.out_substr("<INVALID>")!;
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continue;
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}
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if (self.flags.left)
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{
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usz len = print_hex_chars(self, out, self.flags.uppercase)!;
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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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if (self.width)
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{
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total_len += self.pad(' ', self.width, out.len * 2)!;
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}
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total_len += print_hex_chars(self, out, self.flags.uppercase)!;
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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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if (self.width)
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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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}
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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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self.first_err(INVALID_FORMAT);
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total_len += self.out_substr("<BAD FORMAT>")!;
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continue;
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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;
|
|
}
|
|
// ignore '0' flag when precision is given
|
|
if (self.flags.precision) self.flags.zeropad = false;
|
|
|
|
bool is_neg;
|
|
total_len += @wrap_bad(self, self.ntoa(int_from_any(current, &is_neg), is_neg, base))!;
|
|
}
|
|
// termination
|
|
// out((char)0, buffer, idx < maxlen ? idx : maxlen - 1U, maxlen);
|
|
|
|
// return written chars without terminating \0
|
|
if (self.first_fault) return self.first_fault?;
|
|
return total_len;
|
|
}
|
|
|
|
|
|
fn usz? Formatter.print(&self, String str)
|
|
{
|
|
if (!self.out_fn)
|
|
{
|
|
// use null output function
|
|
self.out_fn = &out_null_fn;
|
|
}
|
|
foreach (c : str) self.out(c)!;
|
|
return self.idx;
|
|
}
|