new tree file format

src/parser.cpp

@@ -0,0 +1,157 @@
+#include <iostream>
+/* #include <string_view> */
+#include <string>
+#include "tree.hpp"
+#include "utils.hpp"
+
+using std::cerr;
+using std::string_view;
+using std::string;
+
+namespace /* internal */
+{
+	char* data;
+	char* data_end;				/* past the end pointer */
+	unsigned line = 1;
+
+	/* state */
+	void (*state)();			/* current state */
+	void state_neutral();
+	void state_person();
+	/* void state_person_attribute() */
+
+	/* result */
+	Tree* cur_tree;
+
+
+	void unexpected_char(char c)
+	{
+		cerr << "Line " << line <<  ": Unexpected '" << c << "'\n";
+		exit(1);
+		/* throw 0; */
+	}
+
+	void unexpected_end()
+	{
+		cerr << "Unexpected end of file";
+		exit(1);
+	}
+
+	void proceedToNameEnd()
+	{
+		while(data < data_end &&
+			  *data != ',' &&
+			  *data != '\n')
+		{
+			if(*data == ':' /* && *data == '-' */)
+				unexpected_char(*data);
+			++data;
+		}
+
+	}
+
+	Sex findSex()
+	{
+		Sex res = M;
+		if(*data == ',')
+		{
+			++data;
+			if(*data == 'M')
+				res = M;
+			else if(*data == 'F')
+				res = F;
+			else
+				unexpected_char(*data);
+
+			++data;
+			if(*data != '\n')
+				unexpected_char(*data);
+		}
+		return res;
+	}
+
+	void processAtribute()
+	{
+
+	}
+
+	void state_neutral()
+	{
+		for(; data < data_end; ++data)
+		{
+			switch(*data)
+			{
+			default:
+				state_person();
+				return;
+				break;
+			case '\n':
+				++line;
+				break;
+			/* case '#': */
+			/* 	state = state_comment; */
+			/* 	return; */
+			case ',':
+			case '-':
+			case 0 ... 9:
+			case ':':
+				unexpected_char(*data);
+			}
+		}
+	}
+
+	void state_person()
+	{
+		char* name_start = data;
+		person_id parent1;
+		person_id parent2;
+		EventTime birth;
+		EventTime death;
+
+		proceedToNameEnd();
+		/* string_view name(name_start, data); */
+		string name(name_start, data);
+
+		Sex sex = findSex();
+
+		for(; data < data_end; ++data)
+		{
+			switch(*data)
+			{
+			case '\n':
+				++line;
+				if(data[1] == ':') /* todo */
+				{
+					processAtribute();
+				}
+				else
+				{
+					cur_tree->addPerson(name.c_str(), sex/* , parent1, parent2, birth, death */);
+				}
+				break;
+			/* case '#': */
+				/* state = state_comment; */
+				/* return; */
+			/* case 0...9: */
+			/* case ':': */
+			/* 	unexpected_char(*data); */
+			default:
+				break;
+			}
+		}
+	}
+}
+
+
+Tree parseTftFile(MappedFile file)
+{
+	data = file.data;
+	data_end = file.data + file.len;
+
+	Tree result("name");
+	cur_tree = &result;
+
+	state_neutral();
+
+	return result;
+}