int main(int argc, char *argv[])
/******************************************************************************/
{
/* Array of pointers to read functions */
int (*GetLine[3])(FILE*, char*) = { T_fscanf, T_fgets, T_fgetc };
int iReadMode; /* Index into *GetLine[] array */
int iReadReturn; /* Result of read function */
int isFilePosErr; /* Boolean indicating file offset error */
long lFileLen; /* Length of file */
long lLastFilePos; /* Byte offset of end of previous line */
long lLineCount; /* Line count accumulator */
long lLineLen; /* Length of current line */
long lThisFilePos; /* Byte offset of start of current line */
char szReadLine[MAX_REC_LEN]; /* Input buffer */
FILE *inputFilePtr; /* Pointer to input file */
if (argc < 4) /* All arguments are required */
{
syntax();
return 1;
}
/* Set index into function pointer array based on command line */
if (strcmp(argv[3], "fscanf") == 0)
iReadMode = 0;
else if (strcmp(argv[3], "fgets") == 0)
iReadMode = 1;
else if (strcmp(argv[3], "fgetc") == 0)
iReadMode = 2;
else if (strcmp(argv[3], "fread") == 0)
iReadMode = 3;
else /* Oops */
{
syntax();
return 1;
}
if (strcmp(argv[2], "t") == 0)
inputFilePtr = fopen(argv[1], "r"); /* Open in TEXT mode */
else if (strcmp(argv[2], "b") == 0)
inputFilePtr = fopen(argv[1], "rb"); /* Open in BINARY mode */
else /* Oops */
{
syntax();
return 1;
}
if (inputFilePtr == NULL ) /* Could not open file */
{
printf("Error opening %s: %s (%u)\n", argv[1], strerror(errno), errno);
return 1;
}
fseek(inputFilePtr, 0L, SEEK_END); /* Position to end of file */
lFileLen = ftell(inputFilePtr); /* Get file length */
rewind(inputFilePtr); /* Back to start of file */
PrintHeader(argv, lFileLen); /* Print the header info */
/*
* The implementation of the fread() function in this program is
* different enough from the other read methods that it's easiest
* to just call it explicitly and quit.
*/
if (iReadMode == 3) /* Use fread() */
{
iReadReturn = T_fread(inputFilePtr); /* Read the file and print output */
fclose(inputFilePtr); /* Close it */
HR(80); /* Print a separator line */
return (iReadReturn ? 0 : 1); /* Exit with success or error code */
}
/* At this point, we'll be using fscanf(), fgets(), or fgetc() */
lLineCount = 0L; /* No lines read yet */
lLastFilePos = -1L; /* So first line doesn't show an offset error */
while (1)
{
isFilePosErr = 0; /* Clear error flag */
lThisFilePos = ftell(inputFilePtr); /* Offset of start of line */
/* This will not necessarily be */
/* the absolute file offset if */
/* the file is opened in TEXT */
/* mode. */
if (lThisFilePos != lLastFilePos + 1) /* Set error flag if not next byte */
isFilePosErr = 1;
szReadLine[0] = '\0'; /* Clear buffer for next line */
/* Read the next line with the appropriate read function */
iReadReturn = (*GetLine[iReadMode])(inputFilePtr, szReadLine);
if (iReadReturn < 0) /* Error reading line */
{
/*
* Any system error code generated in the read functions is returned
* as a negative number so we can use positive numbers to indicate
* success. Therefore, we need to 're-negative' it to convert it back
* to the original error code.
*
* Error codes are implentation-dependent, but as far as I know, they
* are always positive integers.
*/
printf("Error reading %s: %s (%u)\n",
argv[1], strerror(-errno), -errno);
break;
}
lLineLen = strlen(szReadLine); /* Get length of line */
if (lLineLen) /* Got some data */
{
++lLineCount; /* Increment line counter */
/* Print the line's detail */
PrintLine(szReadLine, lLineCount, lLineLen,
lThisFilePos, &lLastFilePos, isFilePosErr);
}
if (iReadReturn == 0) /* End of file reached */
{
lThisFilePos = ftell(inputFilePtr); /* EOF offset */
HR(80); /* Print a separator line */
printf("EOF at offset %#x (dec %ld)\n", (int)lThisFilePos, lThisFilePos);
break;
}
}/* end while (1) */
fclose(inputFilePtr); /* Close the file */
HR(80); /* Print a separator line */
return 0; /* Exit with success code */
} /* end main() */
int main(int argc, char *argv[])
/******************************************************************************/
{
int bool_val = 0; // bool for input val
int iReadReturn; /* Result of read function */
long lFileLen; /* Length of file */
char decisionBool[4];
char somestring[100];
FILE *inputFilePtr; /* Pointer to input file */
FILE *fp;
//inputText = (char *)malloc(sizeof(char));
//targetFile = (char *)malloc(sizeof(char));
//keyword = (char *)malloc(sizeof(char));
//inputText = keyword;
printf(" This script will read in an input text file that you will specify and will\nwrite each line of text data with has a certainkeyword into an output text file\nthat you also will specify.\n\n");
printf(" Note that this keyword must be modified in this script ('read.C')(it is one\nof the first lines of code you will see).\n\n");
printf(" To begin, please press enter.\n\n");
getchar();
//const char *keyword = keywordPrompt();
//char *keyword = "test";
char tmp_key[99]; // Keyword definition, var for storing keyword
char tmp_input[99];
char tmp_output[99];
char *keyword;
char *inputText;
char *targetFile;
//char *keyword;
// INPUT KEYWORD====================================================
while (bool_val == 0){
printf("Please type in your keyword:\n");
fgets(somestring, sizeof(somestring)-1, stdin);
sscanf(somestring, "%s", &tmp_key[0]);
keyword = &tmp_key[0];
printf("Your keyword is: '%s'\n Do you wish to keep this value? [Y/n] : \n", keyword);
fgets(decisionBool, sizeof decisionBool, stdin);
strtok(decisionBool, "\n"); /* remove a newline if present */
//strcmp(decisionBool, "n") ? keywordPrompt() : printf("no match w/ n\n");
bool_val = strcmp(decisionBool, "n")==0 ? 0 : 1;
}
bool_val = 0; //reset bool
printf(" keeping keyword value '%s'\n\n", keyword);
// print address
//printf("Address of key_ptr: %p\n", keyword);
//keyword = keywordPrompt();
while (bool_val == 0){
printf("Please type in the name of your input text file (where to read raw data from):\n");
fgets(somestring, sizeof(somestring)-1, stdin);
sscanf(somestring, "%s", &tmp_input[0]);
inputText = &tmp_input[0];
printf("Your keyword is: '%s'\n Do you wish to keep this value? [Y/n] : \n", inputText);
fgets(decisionBool, sizeof decisionBool, stdin);
strtok(decisionBool, "\n"); /* remove a newline if present */
//strcmp(decisionBool, "n") ? keywordPrompt() : printf("no match w/ n\n");
bool_val = strcmp(decisionBool, "n")==0 ? 0 : 1;
}
printf(" keeping inputText value '%s'\n\n", inputText);
bool_val = 0; // reset bool
//targetFile = outputTextPrompt();
//printf("This is the targtetFile directory: %s\n", targetFile);
while (bool_val == 0){
printf("Please type in the name of your input text file (where to read raw data from):\n");
fgets(somestring, sizeof(somestring)-1, stdin);
sscanf(somestring, "%s", &tmp_output[0]);
targetFile = &tmp_output[0];
printf("Your keyword is: '%s'\n Do you wish to keep this value? [Y/n] : \n", targetFile);
fgets(decisionBool, sizeof decisionBool, stdin);
strtok(decisionBool, "\n"); /* remove a newline if present */
//strcmp(decisionBool, "n") ? keywordPrompt() : printf("no match w/ n\n");
bool_val = strcmp(decisionBool, "n")==0 ? 0 : 1;
}
printf(" keeping targetFile value '%s'\n\n", targetFile);
//bool_val = 0; // reset bool
printf("This is the keyword: %s\n", keyword);
printf("This is the inputText directory: %s\n", inputText);
printf("This is the targtetFile directory: %s\n", targetFile);
printf("This is keyword's address: %p\n", &keyword);
printf("This is inputText's address: %p\n", &inputText);
printf("This is targetText's address: %p\n", &targetFile);
argc = 4;
argv[0] = "read.c";
argv[1] = inputText;
//argv[1] = "test.txt";
argv[2] = "t";
argv[3] = "fread";
// appending argv[4] - target file for writi ng
//argv[4] = "target_test2.txt";
//argv[4] = outputText;
// define keyword
if (argc < 4) /* All arguments are required */
{
syntax();
return 1;
}
if (strcmp(argv[2], "t") == 0)
inputFilePtr = fopen(argv[1], "r"); /* Open in TEXT mode */
else if (strcmp(argv[2], "b") == 0)
inputFilePtr = fopen(argv[1], "rb"); /* Open in BINARY mode */
else /* Oops */
{
syntax();
return 1;
}
if (inputFilePtr == NULL ) /* Could not open file */
{
printf("Error opening %s: %s (%u)\n", argv[1], strerror(errno), errno);
return 1;
}
fseek(inputFilePtr, 0L, SEEK_END); /* Position to end of file */
lFileLen = ftell(inputFilePtr); /* Get file length */
rewind(inputFilePtr); /* Back to start of file */
/*
* The implementation of the fread() function in this program is
* different enough from the other read methods that it's easiest
* to just call it explicitly and quit.
*/
//create outputText file if it doesn't exist
if(file_exists(targetFile)==0){
printf("file %s didn't exist - should exist now\n", targetFile);
fp = fopen (targetFile, "w+");
fclose(fp);
}
PrintHeader(argv, lFileLen); /* Print the header info */
//const char *keyword;
//keyword = keywordPrompt();
//keyword = "test";
iReadReturn = T_fread(inputFilePtr, keyword, targetFile); /* Read the file and print output */
fclose(inputFilePtr); /* Close it */
HR(80); /* Print a separator line */
//free(inputText);
//free(targetFile);
//free(keyword);
return (iReadReturn ? 0 : 1); /* Exit with success or error code */
} /* end main() */
