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#include "functions.h"
// Print a debugging message, if debugging enabled
int debugmode;
void debug(char *string) {
if (debugmode) {
printf("DEBUG: %s\n", string);
}
}
// Get stdin line with buffer overrun protection
int getstdin(char *prompt, char *buff, size_t sz) {
int ch, extra;
// Print optional prompt
if (prompt != NULL) {
printf ("%s", prompt);
fflush (stdout);
}
// Get the intput from stdin
if (fgets (buff, sz, stdin) == NULL) {
return NO_INPUT;
}
// If it was too long, there'll be no newline. In that case, we flush
// to end of line so that excess doesn't affect the next call.
if (buff[strlen(buff) - 1] != '\n') { // strlen of the actually entered line, not the original array size
extra = 0;
while (((ch = getchar()) != '\n') && (ch != EOF)) {
extra = 1;
}
return (extra == 1) ? TOO_LONG : OK;
}
// Otherwise remove newline and give string back to caller.
buff[strlen(buff) - 1] = '\0';
return OK;
}
// Append CR-LF to the end of a string (after cleaning up any existing trailing CR or LF)
void appendcrlf(char *string) {
// Make sure it doesn't already end with CR or LF
while (string[strlen(string) - 1] == '\r' || string[strlen(string) - 1] == '\n') {
string[strlen(string) - 1] = '\0';
}
int startlen = strlen(string);
string[startlen] = '\r'; // Add CR
string[startlen + 1] = '\n'; // Add LF
string[startlen + 2] = '\0'; // Finish with null terminator
}
// Remove leading colon ':' which is the starting character of a prefix in an IRC message
void stripprefix(char *string) {
// Make a copy to work with
char string2[strlen(string)];
printf("stripprefix(): starting with '%s', strlen: %zd.\n", string, strlen(string));
// Don't bother if this isn't a prefix with a leading ':'
if (string[0] != ':') {
printf("stripprefix(): no leading ':', returning.\n");
return;
}
// Copy the old string into a new one, but...
for (size_t i = 1; i < strlen(string); i++) {
printf("i: %zd. strlen: %zd.\n", i, strlen(string));
string2[i - 1] = string[i];
}
// Copy result back to original string
strncpy(string, string2, strlen(string) - 1);
// Finish with null terminator
string[strlen(string) - 1] = '\0';
printf("stripprefix(): finishing with '%s', strlen: %zd.\n", string, strlen(string));
}
// Extract final parameter from IRC message, removing the leading colon ':'
// e.g. given this string:
// ":irc.tghost.co.uk 332 blabounce #test :This is a test topic!"
// We want to end up with:
// "This is a test topic!"
void extractfinalparameter(char *string) {
// Make a copy to work with
char string2[strlen(string)];
// Position of colon
int colonpos = -1;
printf("extractfinalparameter(): starting with '%s', strlen: %zd.\n", string, strlen(string));
// Strip the colon at position 0 if there is one
stripprefix(string);
// Find the colon
for (size_t i = 0; i < strlen(string); i++) {
printf("i: %zd. strlen: %zd.\n", i, strlen(string));
if (string[i] == ':') {
printf("Found colon at position %zd!\n", i);
colonpos = i;
break;
}
}
if (colonpos == -1) {
printf("no colon found, returning\n");
return;
}
// Build a new string starting from the next position after the colon
int counter = 0;
for (size_t i = colonpos + 1; i < strlen(string); i++) {
printf("i: %zd. strlen: %zd.\n", i, strlen(string));
string2[counter] = string[i];
counter++;
}
// Copy result back to original string
strncpy(string, string2, counter);
// Finish with null terminator
string[counter] = '\0';
printf("extractfinalparameter(): finishing with '%s', strlen: %zd.\n", string, strlen(string));
}
// Extract the IRC nick from a prefix
// e.g. given this string:
// ":foo!bar@baz"
// We want to end up with:
// "foo"
void extractnickfromprefix(char *string) {
// Position of bang
int bangpos = -1;
printf("extractnickfromprefix(): starting with '%s', strlen: %zd.\n", string, strlen(string));
// Strip the colon at position 0 if there is one
stripprefix(string);
// Find the bang
for (size_t i = 0; i < strlen(string); i++) {
printf("i: %zd. strlen: %zd.\n", i, strlen(string));
if (string[i] == '!') {
printf("Found bang at position %zd!\n", i);
bangpos = i;
break;
}
}
if (bangpos == -1) {
printf("no bang found, returning\n");
return;
}
// Terminate the string at whatever position we found the bang
string[bangpos] = '\0';
printf("extractnickfromprefix(): finishing with '%s', strlen: %zd.\n", string, strlen(string));
}
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