stringfile.C

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#include "stringfile.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

StringFile::StringFile(long length)
{
        pointer = 0;
        if(length == 0)
        {
                this->length = 100000;
        }
        else
        {
                this->length = length;
        }
        string = new char[this->length + 1];
        available = this->length;
}

StringFile::StringFile(char *filename)
{
        FILE *in;
        if(in = fopen(filename, "rb"))
        {
                fseek(in, 0, SEEK_END);
                length = ftell(in);
                available = length;
                fseek(in, 0, SEEK_SET);
                string = new char[length + 5];

                fread(string, length, 1, in);
                for(int i = 0; i < 5; i++) string[length + i] = 0;
                fclose(in);
        }
        else
        {
                //printf("File not found: %s\n", filename);
                length = 0;
                available = 1;
                string = new char[1];
                string[0] = 0;
        }
        
        pointer = 0;
}

StringFile::~StringFile()
{
        delete [] string;
}

int StringFile::write_to_file(char *filename)
{
        FILE *out;
        if(out = fopen(filename, "wb"))
        {
                fwrite(string, pointer, 1, out);
        }
        else
        {
//              printf("Couldn't open %s for writing.\n", filename);
                return 1;
        }
        fclose(out);
        return 0;
}

int StringFile::read_from_string(char *string)
{
        int i;
        
        delete [] this->string;
        length = strlen(string);
        available = length;
        this->string = new char[length + 5];
        strcpy(this->string, string);
        for(i = 0; i < 5; i++) this->string[length + i] = 0;
        return 0;
}

long StringFile::get_length()
{
        return strlen(string);
}

long StringFile::get_pointer()
{
        return pointer;
}

int StringFile::readline(char *arg2)
{       
        readline(string1, arg2);
        return 0;
}

int StringFile::readline()
{       
        readline(string1, string1);
        return 0;
}

int StringFile::readline(float *arg2)
{
        readline(string1, arg2);
        return 0;
}

int StringFile::readline(int *arg2)
{
        readline(string1, arg2);
        return 0;
}

int StringFile::readline(long *arg2)
{
        readline(string1, arg2);
        return 0;
}

int StringFile::readline(Freq *arg2)
{
        readline(string1, &(arg2->freq));
        return 0;
}

int StringFile::readline(char *arg1, char *arg2)
{
        int i, len, max;
        len = 0; max = 1024;
        
        while(string[pointer] == ' ') pointer++; // skip indent
        arg1[0] = 0;    arg2[0] = 0;
        
        for(i = 0; string[pointer] != ' ' && string[pointer] != '\n' && len < max; i++, pointer++)
        {     // get title
                arg1[i] = string[pointer];
                len++;
        }
        arg1[i] = 0;

        if(string[pointer] != '\n')
        {       // get value
                pointer++;      // skip space
                for(i = 0; string[pointer] != '\n' && len < max; i++, pointer++)
                {
                        arg2[i] = string[pointer];
                        len++;
                }
                arg2[i] = 0;
        }
        pointer++;      // skip eoln
        return 0;
}

int StringFile::backupline()
{
        while(string[pointer] != 10 && pointer > 0)
        {
                pointer--;     // first eoln
        }
        if(string[pointer] == 10) pointer--;        // skip eoln
        
        while(string[pointer] != 10 && pointer > 0)
        {
                pointer--;     // second eoln
        }
        
        if(string[pointer] == 10) pointer++;      // skip eoln
        return 0;
}

int StringFile::readline(char *arg1, long *arg2)
{
        readline(arg1, string1);
        *arg2 = atol(string1);
        return 0;
}

int StringFile::readline(char *arg1, int *arg2)
{
        long arg;
        readline(arg1, &arg);
        *arg2 = (int)arg;
        return 0;
}

int StringFile::readline(char *arg1, float *arg2)
{
        readline(arg1, string1);
        *arg2 = atof(string1);
        return 0;
}

int StringFile::writeline(char *arg1, int indent)
{
        int i;
        
// reallocate the string
        if(pointer + strlen(arg1) > available)
        {
                char *newstring = new char[available * 2];
                strcpy(newstring, string);
                delete string;
                available *= 2;
                length *= 2;
                string = newstring;
        }
        
        for(i = 0; i < indent; i++, pointer++) string[pointer] = ' ';
        sprintf(&string[pointer], arg1);
        pointer += strlen(arg1);
        return 0;
}

int StringFile::writeline(char *arg1, char *arg2, int indent)
{
        int i;
        
        sprintf(string1, "%s %s\n", arg1, arg2);
        writeline(string1, indent);
        return 0;
}

int StringFile::writeline(char *arg1, long arg2, int indent)
{
        sprintf(string1, "%s %ld\n", arg1, arg2);
        writeline(string1, indent);
        return 0;
}

int StringFile::writeline(char *arg1, int arg2, int indent)
{
        sprintf(string1, "%s %d\n", arg1, arg2);
        writeline(string1, indent);
        return 0;
}

int StringFile::writeline(char *arg1, float arg2, int indent)
{
        sprintf(string1, "%s %f\n", arg1, arg2);
        writeline(string1, indent);
        return 0;
}

int StringFile::writeline(char *arg1, Freq arg2, int indent)
{       
        sprintf(string1, "%s %d\n", arg1, arg2.freq);
        writeline(string1, indent);
        return 0;
}

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