#define TRUE 1
#define MAX_REC_LEN 1024
#define EOF_MARKER 26
#define LF 10
#define CR 13
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<errno.h>
//#include<curses.h>
int getline(char line[], int max)
{
int nch = 0;
int c;
max = max - 1; /* leave room for '\0' */
while((c = getchar()) != '\0')
{
if(c == '\n')
break;
if(nch < max)
{
line[nch] = c;
nch = nch + 1;
}
}
if(c == EOF && nch == 0)
return EOF;
line[nch] = '\0';
return nch;
}
void HR(int iLen)
{
int i;
for (i = 0; i < iLen; i++)
printf("-");
printf("\n");
return;
} /* end HR() */
/******************************************************************************/
int search_delete(FILE *fp,char *szReadLine, long lLineCount, long lLineLen, long lThisFilePos, long *lLastFilePos, int isFilePosErr, char *lookup_field, int del_choice)
/******************************************************************************/
/* Use: Details for current line */
/* */
/* Arguments: char *szReadLine = Read buffer containg text line */
/* long lLineCount = Current line number */
/* long lLineLen = Current line length */
/* long lThisFilePos = Offset of start of current line */
/* long *lLastFilePos = Offset of end of current line */
/* int isFilePosErr = True if start of current line is not */
/* 1 greater than end of last line */
/* */
/* Return: int 1 or 0 if the record is deleted or not */
/******************************************************************************/
{
int flag=0;
char *cPtr; /* Pointer to current character */
int i=-1,j=-1,k=-1;
char *title[20];
char *fname[20];
char *lname[20];
char *price[10];
char *repcost[10];
int count1=0, count2=0 ,count3=0, count4=0,count5=0;
int p=0;
int m=-1;
int del_count=0;
int l=-1;
int count;
char c;
int p_loop=0;
//FILE* fp1;
//fp1=fopen("lov1.txt","w+");
//printf("Book ID: %ld",lLineNumber);
char *temp3;
char *tit;
cPtr = szReadLine; /* Point to start of string */
/* Print the characters, including null terminator */
for (cPtr = szReadLine; cPtr <= szReadLine + lLineLen; cPtr++)
{
if(del_count==0)
{
if(*cPtr=='|')
{
//printf("A | encountered");
del_count++;
title[++i]='\0';
printf("\n\nThe value in Title is: %s",title);
*cPtr++;
//break;
}
else
{
title[++i]=*cPtr;
count1=i+1;
}
}//end of del_count0
if(del_count==1)
{
if(*cPtr=='|')
{
//printf("A | encountered");
del_count++;
fname[++j]='\0';
*cPtr++;
//break;
}
else
{
fname[++j]=*cPtr;
count2=j+1;
// printf("Character Count: %d",count2);
}
}//end of del_count0
if(del_count==2)
{
if(*cPtr=='|')
{
//printf("A | encountered");
del_count++;
lname[++k]='\0';
printf("\n\nThe value in Last Name is: %s",lname);
*cPtr++;
//break;
}
else
{
lname[++k]=*cPtr;
count3=k+1;
}
}//end of del_count0
if(del_count==3)
{
if(*cPtr=='|')
{
//printf("A | encountered");
del_count++;
price[++l]='\0';
printf("\n\nThe value in Price is: %s",price);
*cPtr++;
//break;
}
else
{
price[++l]=*cPtr;
count4=l+1;
}
}//end of del_count
if(del_count==4)
{
if(*cPtr=='\0')
{
//printf("A | encountered");
del_count++;
repcost[++m]='\0';
printf("\n\nThe value in Replacement Cost is: %s",repcost);
*cPtr++;
//break;
}
else
{
repcost[++m]=*cPtr;
count5=m; //no +1 cos' its the terminator char
}
}//end of del_count0
} /* end for (cPtr) */
printf("CCC: %d %d %d %d %d ", count1,count2,count3,count4,count5);
for (p=0; p<count1; p++)
{
title[p] = tolower(title[p]);
printf("\n--%c--",title[p]);
//lookup_field[p]=tolower(lookup_field[p]);
if(title[p]==lookup_field[p])
{
printf("YES");
}
}
for (p=0; p<count2; p++)
{
fname[p] = tolower(fname[p]);
// printf("\n--%c--",fname[p]);
//lookup_field[p]=tolower(lookup_field[p]);
}
for (p=0; p<count3; p++)
{
lname[p] = tolower(lname[p]);
// printf("\n--%c--",fname[p]);
//lookup_field[p]=tolower(lookup_field[p]);
}
for (p=0; p<count4; p++)
{
price[p] = tolower(price[p]);
// printf("\n--%c--",fname[p]);
//lookup_field[p]=tolower(lookup_field[p]);
}
for (p=0; p<count5; p++)
{
repcost[p] = tolower(repcost[p]);
// printf("\n--%c--",fname[p]);
//lookup_field[p]=tolower(lookup_field[p]);
}
//printf("%s\n %s\n",fname,lookup_field);
switch(del_choice)
{
case 1:
//count= strncmp(lookup_field,title,sizeof(title));
if(count==0)
{
printf("YES YES");
}
if(*title==*lookup_field)
{
return(1);
}
else
{
return(0);
}
break;
case 2:
if(*fname==*lookup_field)
{
printf("\n\n YEAH BABY THEY ARE EQUAL");
return(1);
}
else
{
return(0);
}
break;
case 3:
if(*lname==*lookup_field)
{
printf("\n\n YEAH BABY THEY ARE EQUAL");
return(1);
}
else
{
return(0);
}
break;
} //end of switch case
printf("\n");
} /* end of function search_delete()*/
/******************************************************************************/
void PrintLine(char *szReadLine, long lLineCount, long lLineLen,
long lThisFilePos, long *lLastFilePos, int isFilePosErr)
/******************************************************************************/
/* Use: Print detail for current line */
/* */
/* Arguments: char *szReadLine = Read buffer containg text line */
/* long lLineCount = Current line number */
/* long lLineLen = Current line length */
/* long lThisFilePos = Offset of start of current line */
/* long *lLastFilePos = Offset of end of current line */
/* int isFilePosErr = True if start of current line is not */
/* 1 greater than end of last line */
/* */
/* Return: void */
/******************************************************************************/
{
char *cPtr; /* Pointer to current character */
int del_count=0;
HR(80); /* Print a separator line */
printf("Book ID: %ld, Length=%#x (dec %ld)\n",lLineCount, (int)lLineLen, lLineLen); /* See PrintHeader() for an */
/* explanation of why the cast */
/* is needed. */
// printf(" Offset:");
cPtr = szReadLine; /* Point to start of string */
//if (isFilePosErr) /* Indicates offset error */
// printf("*%2x", lThisFilePos++); /* Print '*' plus starting offset */
// else /* Offset okay */
// printf("%3x", lThisFilePos++); /* Just print starting offset */
//for (++cPtr; cPtr < szReadLine + lLineLen; cPtr++) /* Remaining offsets */
//printf("%3x", lThisFilePos++);
//if (lLastFilePos != NULL) /* Set end position if arg passed */
//*lLastFilePos = lThisFilePos - 1;
//printf("\n Hex: ");
/* Print the hex values, including null terminator */
//for (cPtr = szReadLine; cPtr <= szReadLine + lLineLen; cPtr++)
//printf("%3x", *cPtr);
//printf("\n Char: ");
if(del_count==0)
{
printf("\n Title: ");
}
/* Print the characters, including null terminator */
for (cPtr = szReadLine; cPtr <= szReadLine + lLineLen; cPtr++)
{
switch (*cPtr)
{
case 0: /* Null terminator */
//printf(" \\0");
break;
case CR: /* Carriage return */
//printf(" cr");
break;
case LF: /* Line feed */
//printf(" lf");
break;
case EOF_MARKER: /* DOS end-of-file marker */
//printf(" em");
break;
case '|':
//printf("|");
del_count++;
if(del_count==1)
{
printf("\n Author: ");
}
if(del_count==2)
{
printf(", ");
}
if(del_count==3)
{
printf("\n Year: ");
}
if(del_count==4)
{
printf("\n Replacement Cost: ");
}
break;
default: /* A 'real' character */
//printf("%3c", *cPtr);
printf("%c",*cPtr);
break;
} /* end switch (*cPtr) */
} /* end for (cPtr) */
printf("\n");
return;
} /* end PrintLine()*/
load_catalogue(FILE *input)
{
int isNewline; /* Boolean indicating we've read a CR or LF */
long lFileLen; /* Length of file */
long lIndex; /* Index into cThisLine array */
long lLineCount; /* Current line number */
long lLineLen; /* Current line length */
long lStartPos; /* Offset of start of current line */
long lTotalChars; /* Total characters read */
char cThisLine[MAX_REC_LEN]; /* Contents of current line */
char *cFile; /* Dynamically allocated buffer (entire file) */
char *cThisPtr; /* Pointer to current position in cFile */
fseek(input, 0L, SEEK_END); /* Position to end of file */
lFileLen = ftell(input); /* Get file length */
rewind(input); /* Back to start of file */
cFile = calloc(lFileLen + 1, sizeof(char));
if(cFile == NULL )
{
printf("\nInsufficient memory to read file.\n");
return 0;
}
fread(cFile, lFileLen, 1, input); /* Read the entire file into cFile */
lLineCount = 0L;
lTotalChars = 0L;
cThisPtr = cFile; /* Point to beginning of array */
while (*cThisPtr) /* Read until reaching null char */
{
lIndex = 0L; /* Reset counters and flags */
isNewline = 0;
lStartPos = lTotalChars;
while (*cThisPtr) /* Read until reaching null char */
{
if (!isNewline) /* Haven't read a CR or LF yet */
{
if (*cThisPtr == CR || *cThisPtr == LF) /* This char IS a CR or LF */
isNewline = 1; /* Set flag */
}
else if (*cThisPtr != CR && *cThisPtr != LF) /* Already found CR or LF */
break; /* Done with line */
cThisLine[lIndex++] = *cThisPtr++; /* Add char to output and increment */
++lTotalChars;
} /* end while (*cThisPtr) */
cThisLine[lIndex] = '\0'; /* Terminate the string */
++lLineCount; /* Increment the line counter */
lLineLen = strlen(cThisLine); /* Get length of line */
/* Print the detail for this line */
PrintLine(cThisLine, lLineCount, lLineLen, lStartPos, NULL, 0);
} /* end while (cThisPtr <= cEndPtr) */
HR(80); /* Print a separator line */
printf("Length of file array=%#x (dec %d)\n", strlen(cFile), strlen(cFile));
return 1;
}//End of function load_catalogue()
/*Load and delete function for various choices*/
load_delete(FILE *input,char *field,int choice)
{
int isNewline; /* Boolean indicating we've read a CR or LF */
long lFileLen; /* Length of file */
long lIndex; /* Index into cThisLine array */
long lLineCount; /* Current line number */
long lLineLen; /* Current line length */
long lStartPos; /* Offset of start of current line */
long lTotalChars; /* Total characters read */
char cThisLine[MAX_REC_LEN]; /* Contents of current line */
char *cFile; /* Dynamically allocated buffer (entire file) */
char *cThisPtr; /* Pointer to current position in cFile */
int found=0;
char *buffer;
FILE *file1;
fseek(input, 0L, SEEK_END); /* Position to end of file */
lFileLen = ftell(input); /* Get file length */
rewind(input); /* Back to start of file */
cFile = calloc(lFileLen + 1, sizeof(char));
buffer= calloc(lFileLen + 1, sizeof(char));
if(cFile == NULL )
{
printf("\nInsufficient memory to read file.\n");
return 0;
}
fread(cFile, lFileLen, 1, input); /* Read the entire file into cFile */
fclose(input);
file1=fopen("lov1.txt","w+");
lLineCount = 0L;
lTotalChars = 0L;
cThisPtr = cFile; /* Point to beginning of array */
while (*cThisPtr) /* Read until reaching null char */
{
lIndex = 0L; /* Reset counters and flags */
isNewline = 0;
lStartPos = lTotalChars;
while (*cThisPtr) /* Read until reaching null char */
{
if (!isNewline) /* Haven't read a CR or LF yet */
{
if (*cThisPtr == CR || *cThisPtr == LF) /* This char IS a CR or LF */
isNewline = 1; /* Set flag */
}
else if (*cThisPtr != CR && *cThisPtr != LF) /* Already found CR or LF */
break; /* Done with line */
cThisLine[lIndex++] = *cThisPtr++; /* Add char to output and increment */
++lTotalChars;
} /* end while (*cThisPtr) */
cThisLine[lIndex] = '\0'; /* Terminate the string */
++lLineCount; /* Increment the line counter */
lLineLen = strlen(cThisLine); /* Get length of line */
/* Print the detail for this line */
// PrintLine(cThisLine, lLineCount, lLineLen, lStartPos, NULL, 0);
found=search_delete(input, cThisLine, lLineCount, lLineLen, lStartPos, NULL, 0,field,choice);
if(found==1)
{
//dont write it to the buffer
printf("One Matching Record Found: Deleted");
}
else {
//Write that line to the buffer.
fprintf(file1,"%s",cThisLine);
}
} /* end while (cThisPtr <= cEndPtr) */
HR(80); /* Print a separator line */
printf("Length of file array=%#x (dec %d)\n", strlen(cFile), strlen(cFile));
return 1;
} //end of function load_delete()
save_catalogue(char *filename, char *title, char *fname, char *lname, int year, float repl_cost )
{
}//end of function save_catalogue()
sort_display(char *filename, int flag)
{
} //end of the sort_display() function
void main()
{
int choice,del_choice;
char *cat_file="Catalogue.txt";
FILE *fp,*fp1;
int i;
char *del_cat,au_fname[20], au_lname[20];
char new_cat_file[30],new_title[30], new_fau[30], new_lau[30];
int new_year, sort_choice;
float new_rep_cost;
int sort_flag;
while(TRUE)
{
printf("***Library Catalogue***\n\n");
printf("Select your option please:\n\n");
printf("1> Load Catalogue\n");
printf("2> Delete book from the Catalogue\n");
printf("3> Save Catalogue[Inserting a new item]\n");
printf("4> Sort & Display Catalogue\n");
printf("5> Quit\n");
scanf("%d",&choice);
switch(choice)
{
case 1: printf("Load Catalogue\n");
printf("Enter the name of the catalogue file to load:\n");
scanf("%s",cat_file);
fp=fopen(cat_file, "r+");
if(fp==NULL)
{
printf("Error Opening The Catalogue File\n\n");
break;
}
else
{
load_catalogue(fp);
}
fclose(fp); //close the file stream
break;
case 2: printf("Delete book from the Catalogue\n");
printf("Please enter the name of the Catalogue File: ");
scanf("%s",new_cat_file);
fp1=fopen(new_cat_file, "r+");
if(fp1==NULL)
{
printf("Error Opening The Catalogue File\n\n");
break;
}
printf("Press 1 to delete a book by Title\n");
printf("Press 2 to delete a book by Author's First Name\n");
printf("Press 3 to delete a book by Author's Last Name\n");
printf("Your Choice please: ");
scanf("%d",&del_choice);
switch(del_choice)
{
case 1:
printf("Please enter the book title to delete: ");
//scanf("%s",del_cat);
getline(del_cat,30);
printf("%s",del_cat);
for(i=0;i<=30;i++)
{
del_cat[i] = tolower(del_cat[i]);
printf("%c",del_cat[i]);
}
load_delete(fp1,del_cat,del_choice);
break;
case 2:
printf("Enter the Author's First Name to delete books: ");
scanf("%s",au_fname);
for(i=0;i<=20;i++)
{
au_fname[i] = tolower(au_fname[i]);
}
load_delete(fp1,au_fname,del_choice);
break;
case 3:
printf("\nEnter the Author's Last Name: ");
scanf("%s",au_lname);
for(i=0;i<=20;i++)
{
au_lname[i] = tolower(au_lname[i]);
}
load_delete(fp1,au_lname,del_choice);
break;
default:
printf("Sorry Wrong Choice!");
break;
}
break;
case 3: printf("Save Catalogue[Inserting a new item]\n");
printf("Please enter the name of the Catalogue File: ");
scanf("%s",new_cat_file);
printf("\nEnter the title of the book: ");
scanf("%s",new_title);
printf("\nEnter the Author's First Name: ");
scanf("%s",new_fau);
printf("\nEnter the Author's Last Name: ");
scanf("%s",new_lau);
printf("\nEnter the Year of Publication: ");
scanf("%d",&new_year);
printf("\nEnter the Replacement Cost: ");
scanf("%f",&new_rep_cost);
save_catalogue(cat_file,new_title,new_fau,new_lau,new_year,new_rep_cost);
break;
case 4: printf("Sort & Display Catalogue\n");
printf("Please slect the sorting order: \n");
printf("1> By Title\n2> By LastName\n3> By Replacement Cost\n4> By Publication Year\n ");
scanf("%d",&sort_choice);
switch(sort_choice)
{
case 1:
sort_flag=1;
sort_display(cat_file,sort_flag);
break;
case 2:
sort_flag=2;
sort_display(cat_file,sort_flag);
break;
case 3: sort_flag=3;
sort_display(cat_file,sort_flag);
break;
case 4: sort_flag=4;
sort_display(cat_file,sort_flag);
break;
default: printf("Sorry! Invalid Choice.");
break;
} //End of inneer swith case
case 5: printf("Thank you for using the system :)");
exit(0);
break;
default: printf("Sorry! Invalid choice.");
break;
}//End of the main switch case
} // End of the main While loop which runs infinite
} //End of the main() function 
