108 lines
2.4 KiB
C++
108 lines
2.4 KiB
C++
#ifndef CODERS_COMMONS_H_
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#define CODERS_COMMONS_H_
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#include <string>
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#include <stdexcept>
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#include "../typedefs.h"
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union number_u {
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double fval;
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int64_t ival;
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};
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inline int is_box(int c) {
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switch (c) {
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case 'B':
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case 'b':
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return 2;
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case 'O':
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case 'o':
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return 8;
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case 'X':
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case 'x':
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return 16;
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}
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return 10;
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}
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inline bool is_digit(int c) {
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return (c >= '0' && c <= '9');
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}
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inline bool is_whitespace(int c) {
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return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == '\f';
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}
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inline bool is_identifier_start(int c) {
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return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || c == '_' || c == '-' || c == '.';
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}
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inline bool is_identifier_part(int c) {
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return is_identifier_start(c) || is_digit(c);
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}
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inline int hexchar2int(int c) {
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if (c >= '0' && c <= '9') {
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return c - '0';
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}
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if (c >= 'a' && c <= 'f') {
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return 10 + c - 'a';
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}
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if (c >= 'A' && c <= 'F') {
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return 10 + c - 'A';
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}
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return -1;
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}
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extern std::string escape_string(std::string s);
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class parsing_error : public std::runtime_error {
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public:
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std::string filename;
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std::string source;
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uint pos;
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uint line;
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uint linestart;
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parsing_error(std::string message,
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std::string filename,
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std::string source,
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uint pos,
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uint line,
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uint linestart);
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std::string errorLog() const;
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};
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class BasicParser {
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protected:
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std::string filename;
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std::string source;
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uint pos = 0;
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uint line = 1;
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uint linestart = 0;
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virtual void skipWhitespace();
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void skip(size_t n);
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void skipLine();
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bool skipTo(const std::string& substring);
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void expect(char expected);
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void expect(const std::string& substring);
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char peek();
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char nextChar();
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bool hasNext();
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bool isNext(const std::string& substring);
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void expectNewLine();
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void goBack();
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std::string parseName();
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int64_t parseSimpleInt(int base);
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bool parseNumber(int sign, number_u& out);
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std::string parseString(char chr, bool closeRequired=true);
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parsing_error error(std::string message);
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BasicParser(std::string filename, std::string source);
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};
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#endif // CODERS_COMMONS_H_
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