static int shellTui_parseInputForControl()

in bundles/shell/shell_tui/src/shell_tui.c [304:416]
106 lines of code
24 McCabe index (conditional complexity)

static int shellTui_parseInputForControl(shell_tui_t* shellTui, shell_context_t* ctx) {
    char* buffer = ctx->buffer;
    char* in = ctx->in;
    char* dline = ctx->dline;
    celix_shell_tui_history_t* hist = ctx->hist;
    int pos = ctx->pos;
    const char* line = NULL;

    int nr_chars = (int)read(shellTui->inputFd, buffer, LINE_SIZE-pos-1);
    for(int bufpos = 0; bufpos < nr_chars; bufpos++) {
        if (buffer[bufpos] == KEY_ESC1 && buffer[bufpos+1] == KEY_ESC2) {
            switch (buffer[bufpos+2]) {
                case KEY_UP:
                    line = celix_shellTuiHistory_getPrevLine(hist);
                    if (line) {
                        strncpy(in, line, LINE_SIZE);
                        pos = (int)strlen(in);
                        writeLine(shellTui, line, pos);
                    }
                    break;
                case KEY_DOWN:
                    line = celix_shellTuiHistory_getNextLine(hist);
                    if (line) {
                        strncpy(in, line, LINE_SIZE);
                        pos = (int)strlen(in);
                        writeLine(shellTui, line, pos);
                    }
                    break;
                case KEY_RIGHT:
                    if (pos < strlen(in)) {
                        pos++;
                    }
                    writeLine(shellTui, in, pos);
                    break;
                case KEY_LEFT:
                    if (pos > 0) {
                        pos--;
                    }
                    writeLine(shellTui, in, pos);
                    break;
                case KEY_DEL1:
                    if(buffer[bufpos+3] == KEY_DEL2) {
                        bufpos++; // delete cmd takes 4 chars
                        int len = strlen(in);
                        if (pos < len) {
                            for (int i = pos; i <= len; i++) {
                                in[i] = in[i + 1];
                            }
                        }
                        writeLine(shellTui, in, pos);
                    }
                    break;
                default:
                    // Unsupported char, do nothing
                    break;
            }
            bufpos+=2;
            continue;
        } else if (buffer[bufpos] == KEY_BACKSPACE) { // backspace
            if(pos > 0) {
                int len = strlen(in);
                for(int i = pos-1; i <= len; i++) {
                    in[i] = in[i+1];
                }
                pos--;
            }
            writeLine(shellTui, in, pos);
            continue;
        } else if(buffer[bufpos] == KEY_TAB) {
            celixThreadMutex_lock(&shellTui->mutex);
            pos = autoComplete(shellTui, shellTui->shell, in, pos, LINE_SIZE);
            celixThreadMutex_unlock(&shellTui->mutex);
            continue;
        } else if (buffer[bufpos] != KEY_ENTER) { //not end of line -> text
            if (in[pos] == '\0') {
                in[pos+1] = '\0';
            }
            in[pos] = buffer[bufpos];
            pos++;
            writeLine(shellTui, in, pos);
            fflush(shellTui->output);
            continue;
        }

        //parse enter
        writeLine(shellTui, in, pos);
        fprintf(shellTui->output, "\n");
        remove_newlines(in);
        celix_shellTuiHistory_addLine(hist, in);

        memset(dline, 0, LINE_SIZE);
        strncpy(dline, in, LINE_SIZE);

        pos = 0;
        in[pos] = '\0';

        line = celix_utils_trimInPlace(dline);
        if ((strlen(line) == 0)) {
            continue;
        }
        celix_shellTuiHistory_lineReset(hist);
        celixThreadMutex_lock(&shellTui->mutex);
        if (shellTui->shell != NULL) {
            shellTui->shell->executeCommand(shellTui->shell->handle, line, shellTui->output, shellTui->error);
        } else {
            fprintf(shellTui->output, "%s\n", SHELL_NOT_AVAILABLE_MSG);
        }
        celixThreadMutex_unlock(&shellTui->mutex);
        break;
    } // for
    ctx->pos = pos;
    return nr_chars;
}