line_stream.h

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#ifndef GEOGRAM_BASIC_LINE_STREAM
#define GEOGRAM_BASIC_LINE_STREAM
 
#include <geogram/basic/common.h>
#include <geogram/basic/assert.h>
#include <geogram/basic/numeric.h>
#include <geogram/basic/string.h>
#include <cstring>
#include <stdio.h>
 
namespace GEO {
 
    class GEOGRAM_API LineInput {
    public:
        LineInput(const std::string& filename);
 
        ~LineInput();
 
        bool OK() const {
            return ok_;
        }
 
        bool eof() const {
            return feof(F_) ? true : false;
        }
 
        bool get_line();
 
        index_t nb_fields() const {
            return index_t(field_.size());
        }
 
        size_t line_number() const {
            return line_num_;
        }
 
        char* field(index_t i) {
            geo_assert(i < nb_fields());
            return field_[i];
        }
 
        const char* field(index_t i) const {
            geo_assert(i < nb_fields());
            return field_[i];
        }
 
        signed_index_t field_as_int(index_t i) const {
            signed_index_t result = 0;
            if(!String::from_string(field(i), result)) {
                conversion_error(i, "integer");
            }
            return result;
        }
 
        index_t field_as_uint(index_t i) const {
            index_t result = 0;
            if(!String::from_string(field(i), result)) {
                conversion_error(i, "unsigned integer");
            }
            return result;
        }
 
        double field_as_double(index_t i) const {
            double result = 0;
            if(!String::from_string(field(i), result)) {
                conversion_error(i, "floating point");
            }
            return result;
        }
 
        bool field_matches(index_t i, const char* s) const {
            return strcmp(field(i), s) == 0;
        }
 
        void get_fields(const char* separators = " \t\r\n");
 
        const char* current_line() const {
            return line_;
        }
 
    private:
        GEO_NORETURN_DECL void conversion_error(
            index_t index, const char* type
        ) const GEO_NORETURN ;
 
        static const index_t MAX_LINE_LEN = 65535;
 
        FILE* F_;
        std::string file_name_;
        size_t line_num_;
        char line_[MAX_LINE_LEN];
        std::vector<char*> field_;
        bool ok_;
    };
}
 
#endif