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txt2csv.c
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txt2csv.c
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define MAX_ROW 10000
#define MAX_STRING_SIZE 10000
#define MAX_LEN 10000
void handleConvert ();
void handleFiles ();
char getCommandWord (char cmd[], int maxLength);
void doConversions (char *sourceFile, char *destinationFile, char *sourceExt,
char *destExt);
int
main ()
{
char cmd[MAX_STRING_SIZE];
char lastCharacter;
printf
("\n********************************************************************\n");
printf
("********** FILE CONVERSION PROGRAM (.txt -> .csv -> .txt) ************\n");
printf
("********************************************************************\n\n");
printf ("List of commands:\n\n");
printf ("quit\t\t\t\t\tTerminates and exits the program\n");
printf ("convert <source.ext> <dest.ext>\t\tConverts file\n");
while (1)
{
printf ("\nPlease enter command: ");
lastCharacter = getCommandWord (cmd, MAX_STRING_SIZE);
if (!strcmp (cmd, "quit")) break;
else if (!strcmp (cmd, "convert"))
{
if (lastCharacter == '\n')
{
printf ("\nNOT ENOUGH ARGUMENTS\n");
}
else
{
handleConvert ();
}
}
else
{
printf ("\nINVALID COMMAND\n");
while (lastCharacter != '\n')
lastCharacter = getCommandWord (cmd, MAX_STRING_SIZE);
}
}
}
char
getCommandWord (char cmd[], int maxLength)
{
char lastCharacter;
int i;
for (i = 0; i < maxLength && (cmd[i] = getchar ()) != ' ' && cmd[i] != '\n';
i++);
lastCharacter = cmd[i];
cmd[i] = '\0';
return lastCharacter;
}
void
doConversions (char *sourceFile, char *destinationFile, char *sourceExt,
char *destExt)
{
int i = 0;
FILE *input = fopen (sourceFile, "r");
if (input == NULL)
{
printf ("\nNO INPUT FILE FOUND\n");
return;
}
char *data[MAX_ROW];
char *token = (char *) malloc (MAX_STRING_SIZE + 1);
int dataIndex = 0;
char line[MAX_LEN];
char delim[] = " ,\t\n";
for (; fgets (line, MAX_LEN, input) != NULL; i++)
{
data[dataIndex] = (char *) malloc (strlen (line) + 1);
strcpy (data[dataIndex++], line);
}
fclose (input);
input = NULL;
if (!strcmp (destExt, "txt") || !strcmp (destExt, "csv"))
{
FILE *output = fopen (destinationFile, "w");
for (i = 0; i < dataIndex; i++)
{
token = strtok (data[i], delim);
fprintf (output, "%s", token);
while (token = strtok (NULL, delim))
{
if (!strcmp (destExt, "txt"))
fprintf (output, "\t%s", token);
else
fprintf (output, ",%s", token);
}
fprintf (output, "\n");
}
fclose (output);
output = NULL;
}
else
{
printf ("\nFILE EXTENSION NOT SUPPORTED FOR CONVERSION (yet)\n"); //prints if an extension that's not supported is passed
return;
}
printf ("\nCONVERSION COMPLETE!\n");
}
void
handleConvert ()
{
char sourceFile[MAX_STRING_SIZE];
char destinationFile[MAX_STRING_SIZE];
char lastCharacter;
//getting the sourceFile
lastCharacter = getCommandWord (sourceFile, MAX_STRING_SIZE);
if (lastCharacter == '\n')
{
printf ("\nNOT ENOUGH ARGUMENTS\n");
return;
}
//getting the destinationFile
lastCharacter = getCommandWord (destinationFile, MAX_STRING_SIZE);
if (lastCharacter != '\n')
{
printf ("\nTOO MANY ARGUMENTS\n");
while (getCommandWord (destinationFile, MAX_STRING_SIZE) != '\n');
return;
}
char *sourceExt = NULL;
char *destExt = NULL;
if ((sourceExt = strstr (sourceFile, ".")) != NULL)
{
sourceExt++;
}
else
{
printf ("\nPLEASE IDENTIFY THE FILE EXTENSION FOR SOURCE\n");
return;
}
if ((destExt = strstr (destinationFile, ".")) != NULL)
{
destExt++;
}
else
{
printf ("\nPLEASE IDENTIFY THE FILE EXTENSION FOR DESTINATION\n");
return;
}
//depending on the extension of the sourceFile, calling the function
if (!strcmp (sourceExt, "csv") || !strcmp (sourceExt, "txt"))
{
doConversions (sourceFile, destinationFile, sourceExt, destExt);
}
else
{
printf ("\nFILE EXTENSION NOT SUPPORTED OR RECOGNIZED\n");
return;
}
}