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application.c
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application.c
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#include "application.h"
char to_upper_case(char letter) {
if (letter >= 97 && letter <= 122)
//'A'=65 e 'a'=97, então 'a'-'A'=32
letter -= 32;
return letter;
}
char to_lower_case(char letter) {
if (letter >= 65 && letter <= 90)
//'A'=65 e 'a'=97, então 'a'-'A'=32
letter += 32;
return letter;
}
void shift_string(char *string) {
int i;
for(i = 0; i < strlen(string); i++)
string[i] = to_upper_case(string[i]);
}
void invert_string(char *string) {
int i;
for(i = 0; i < strlen(string)/2; i++) {
char temp = string[i];
string[i] = string[strlen(string)-1 - i];
string[strlen(string)-1 - i] = temp;
}
}
void encrypt_caesar_cipher(char *string) {
int i;
for(i = 0; i < strlen(string); i++) {
if (string[i] >= 97 && string[i] <= 122)
string[i] = 97 + ((string[i]-97 + 3)%26 + 26)%26;
else if (string[i] >= 65 && string[i] <= 90)
string[i] = 65 + ((string[i]-65 + 3)%26 + 26)%26;
}
}
void decrypt_caesar_cipher(char *string) {
int i;
for(i = 0; i < strlen(string); i++) {
if (string[i] >= 97 && string[i] <= 122)
string[i] = 97 + ((string[i]-97 - 3)%26 + 26)%26;
else if (string[i] >= 65 && string[i] <= 90)
string[i] = 65 + ((string[i]-65 - 3)%26 + 26)%26;
}
}
/*int* to_number(char *string) {
int i;
int *numbers = (int*)malloc(sizeof(int) * strlen(string));
for(i = 0; i < strlen(string); i++)
numbers[i] = (int)string[i];
return numbers;
}
char* to_char(int *numbers, int size) {
int i;
char *string = (char*)malloc(sizeof(char) * size);
for(i = 0; i < size; i++)
string[i] = (char)numbers[i];
string[size] = '\0';
return string;
}
*/
void char_stream(char *buffer, SWSpecification *swspec, char *text) {
int size = strlen(text);
//char *streaming = (char *)malloc(sizeof(char) * (size+1));
strcpy(buffer, text);
if (swspec->encrypt == true) {
encrypt_caesar_cipher(buffer);
printf("encrypt: %s\n", buffer);
}
if (swspec->shift == true) {
shift_string(buffer);
printf("shift: %s\n", buffer);
}
if (swspec->inverter == true) {
invert_string(buffer);
printf("inverter: %s\n", buffer);
}
if (swspec->decrypt == true) {
decrypt_caesar_cipher(buffer);
printf("decrypt: %s\n", buffer);
}
}