Low level IO read() and write() - c

Question

I am working on a program that is in multiple parts that build off each other. The first program has to read from a file and write the content split up by spaces to a new file. Program two is supposed to take this words and add pig latin to them based on the rule of whether it starts with a vowel or a consonant and appending some string at the end depending on which it started with. I am able to open the file and read from the contents, but I am having trouble finding and appending the proper rules to print to the new file.
int processingWord = 1; //0 is not in the middle of a word and 1 is in the middle
char c;
int bytes; //Should be holding the position of the pointer in the file
while((bytes = read(fileRead, &c, sizeof(c))) > 0) {
//printf("%c", c);
if(processingWord == 0) {
processingWord = 1;
}
if(processingWord == 1) {
//Figure out if a vowel or not
if(c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u' || c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U') {
//Increment the first counter
shard1Count++;
}
//Get to the end of the string
if(c == '\n') {
c = 'r';
write(fileWrite, &c, sizeof(c));
c = 'a';
write(fileWrite, &c, sizeof(c));
c = 'y';
write(fileWrite, &c, sizeof(c));
c = '\n';
write(fileWrite, &c, sizeof(c));
processingWord = 0;
}
}
write(fileWrite, &c, sizeof(c));
}
This is where I am trying to find and append the new "ray" string at the end of the word if it starts with a vowel. The text files look like this
It
is
the
Zucca
Gigantopithecus,
or
Great
Pumpkin,
Charlie
Brown.
And output is supposed to look like this in a new file
Itray
isray
hetay
uccaZay
igantopithecusGay,
orray
reatGay
umpkinPay,
harlieCay
rownBay.
EDIT: processsingWord was an idea I had to check if i was at the end of the line before I checked for vowels and what not. But the logic didn't workout and the output was all jibberish.
My current output file looks like this:
Itray
isray
theray
Zuccaray
Gigantopithecus,ray
orray
Greatray
Pumpkin,ray
Charlieray
Brown.ray
ray

Answer 1

Here is an implementation that should work:
void doStuff(void);
int startsWithVowel(char c);
int isALetter(char c);
void doStuff(){
int processingWord = 0;
int already_latin = 0;
char c = 0;
char first_letter = 0;
while(read(fileRead, &c, sizeof(c)) > 0) {
if(processingWord == 0) {
processingWord = 1;
if(!startsWithVowel(c)){ //append constants to the end of the word in pig latin *EDIT*
first_letter = c;
continue;//Here we do not fall through and write
}
}
else{
if(isALetter(c)){ //This is the general case of just writing the read character
write(fileWrite, &c, sizeof(c));
}
else if(c != '\n'){ //Here is handling for , and . special characters
if(isALetter(first_letter)){ //we hit a . or , with a vower word, need to add first letter then "ray"
write(fileWrite, &first_letter, sizeof(first_letter));
}
write(fileWrite, "ray", sizeof("ray"));
write(fileWrite, &c, sizeof(c));
already_latin = 1;
}
else if(c == '\n') { //here is the end of the string
if(isALetter(first_letter)){
write(fileWrite, &first_letter, sizeof(first_letter));
}
if(!already_latin){
write(fileWrite, "ray", sizeof("ray"));
}
write(fileWrite, &c, sizeof(c));
processingWord = 0; //reset all the flags for the next word.
first_letter = 0;
already_latin = 0;
}//end of '\n'
}//end of if/else block
}//end of while loop
}//end of function
/* =========================================================
return true (1) if the character is a vowel and 0 otherwise
============================================================ */
int startsWithVowel(char c){
if(c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u' || c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U') {
return 1;
}
return 0;
}
/* =========================================================
return true (1) if the character is a letter and 0 otherwise
============================================================ */
int isALetter(char c){
if (((c >= 'A') && (c <= 'Z')) || ((c >= 'a') && (c <= 'z'))){
return 1;
}
return 0;
}
There is still a bunch of unused stuff like the bytes variable, and things could certainly be cleaner, but this should work how you need it to. Try to run it and let me know how it goes, if im still here ill update any bugs tonight
EDIT
Looks like i did it backwards, only swapping vowels (instead of constants). my pig Latin is rusty.
Ok I made a local string to test the parsing online with codechef.com/ide, you can copy and paste this in there to verify. Change the printfs to writes, which mimic the printfs and i think youre good to go:
#include <stdio.h>
#include <string.h>
void doStuff(void);
int startsWithVowel(char c);
int isALetter(char c);
char * str = "It\nis\nthe\nZucca\nGigantopithecus,\nor\nGreat\nPumpkin,\nCharlie\nBrown.";
int main(void) {
doStuff();
return 0;
}
void doStuff(){
int processingWord = 0;
char c = 0;
char first_letter = 0;
int already_latin = 0;
//while(read(fileRead, &c, sizeof(c)) > 0) {
while(strlen(str) > 0){ //Made local for testing, no file io here
c = str[0];
str++; //end of local nonsense you wont have to use
if(processingWord == 0) {
processingWord = 1;
if(!startsWithVowel(c)){
first_letter = c;
continue;//Here we don not fall through and write
}
}
if(processingWord == 1) {
if(isALetter(c)){ //This is the general case of just writing the read character
//write(fileWrite, &c, sizeof(c));
printf("%c",c);
//printf(" SHOULD PRINT FIRST LETTER VOWEL HERE ");
}
else if(c != '\n'){ //Here is handling for , and . special characters
if(isALetter(first_letter)){ //we hit a . or , with a vower word, need to add first letter then "ray"
//write(fileWrite, &first_letter, sizeof(first_letter));
printf("%cay%c",first_letter,c);
}
else{
//write(fileWrite, "ray", sizeof("ray"));
//write(fileWrite, &c, sizeof(c));
printf("ray%c", c);
}
already_latin = 1;
}
else if(c == '\n') { //here is the end of the string
if(!already_latin){
if(isALetter(first_letter)){
//write(fileWrite, &first_letter, sizeof(first_letter));
printf("%cay",first_letter);
//printf(" SHOULD PRINT FIRST LETTER CONSTANT HERE ");
}
else{
//write(fileWrite, "ray", sizeof("ray"));
printf("ray");
}
}
//write(fileWrite, &c, sizeof(c));
printf("%c", c);
processingWord = 0;
first_letter = 0;
already_latin = 0;
}//end of '\n'
}//end of if/else block
}//end of while loop
}//end of function
/* =========================================================
return true (1) if the character is a vowel and 0 otherwise
============================================================ */
int startsWithVowel(char c){
if(c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u' || c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U') {
return 1;
}
return 0;
}
/* =========================================================
return true (1) if the character is a letter and 0 otherwise
============================================================ */
int isALetter(char c){
if (((c >= 'A') && (c <= 'Z')) || ((c >= 'a') && (c <= 'z'))){
return 1;
}
return 0;
}
OUTPUT:
Itray
isray
hetay
uccaZay
igantopithecusGay,
orray
reatGay
umpkinPay,
harlieCay
rownBay.