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optimizations

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Night Kaly 2024-02-06 18:56:52 +00:00
parent f18966ec46
commit 8aea8a33a4
No known key found for this signature in database
GPG key ID: 8E829D3381CFEBBE
1 changed files with 39 additions and 10 deletions
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49
rush.c
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@ -31,8 +31,17 @@ void change_terminal_attribute(int option) {
char **setup_path_variable() {
char *envpath = getenv("PATH");
if (envpath == NULL) {
// ?????
fprintf(stderr, "rush: PATH environment variable is missing\n");
exit(EXIT_FAILURE);
}
char *path_cpy = malloc(sizeof(char) * (strlen(envpath) + 1));
char *path = malloc(sizeof(char) * (strlen(envpath) + 1));
if (path_cpy == NULL || path == NULL) {
fprintf(stderr, "rush: Error allocating memory\n");
exit(EXIT_FAILURE);
}
strcpy(path_cpy, envpath);
strcpy(path, envpath);
int path_count = 0;
@ -45,6 +54,10 @@ char **setup_path_variable() {
}
path_count += 2; // adding one to be correct and one for terminator
char **paths = malloc(sizeof(char *) * path_count);
if (paths == NULL) {
fprintf(stderr, "rush: Error allocating memory\n");
exit(EXIT_FAILURE);
}
char *token = strtok(path, ":");
int counter = 0;
while (token != NULL) {
@ -60,7 +73,6 @@ bool find_command(char **paths, char *command) {
if (strcmp(command, "") == 0) {
return false;
}
int counter = 0;
while (*paths != NULL) {
char current_path[PATH_MAX];
sprintf(current_path, "%s/%s", *paths, command);
@ -136,15 +148,32 @@ char *readline(char **paths) {
}
break;
} else if (arrow_key == 67) { // right
break;
if (position < buf_len) {
printf("\033[%dC", 1); // move cursor right
position++;
}
} else if (arrow_key == 68) { // left
break;
}
}
if (position > 0) {
printf("\033[%dD", 1); // move cursor right
position--;
}
} }
default:
if (c > 31 && c < 127) {
buffer[buf_len] = c;
buffer[buf_len + 1] = '\0'; // make sure printf don't print random characters
if (position == buf_len) {
// Append character to the end of the buffer
buffer[buf_len] = c;
buffer[buf_len + 1] = '\0';
} else {
// Insert character at the current position
memmove(&buffer[position + 1], &buffer[position], buf_len - position + 1);
buffer[position] = c;
printf("\033[s"); // Save cursor position
printf("%s", &buffer[position]); // Print from the current position
printf("\033[u"); // Restore cursor position
printf("\033[%dC", 1); // move cursor right by one place
}
position++;
}
}
char *cmd_part = strchr(buffer, ' ');
@ -209,7 +238,7 @@ char **argsplit(char *line) {
char *token;
if (!tokens) {
fprintf(stderr, "rush: Allocation error\n");
fprintf(stderr, "rush: Error allocating memory\n");
exit(EXIT_FAILURE);
}
@ -222,7 +251,7 @@ char **argsplit(char *line) {
bufsize += TOK_BUFSIZE;
tokens = realloc(tokens, bufsize * sizeof(char*));
if (!tokens) {
fprintf(stderr, "rush: Allocation error\n");
fprintf(stderr, "rush: Error allocating memory\n");
exit(EXIT_FAILURE);
}
}
@ -258,7 +287,7 @@ void command_loop(char **paths) {
char time[256];
strcpy(time, timestr);
color_text(time, lavender); // lavender colored time string
char *cwd = malloc(sizeof(char) * PATH_MAX);
char *cwd = malloc(sizeof(char) * (PATH_MAX + 2));
sprintf(cwd, "[%s]", cwdstr);
color_text(cwd, pink); // pink colored current directory
char arrow[32] = "»";