diff --git a/tests/ldscript.ld b/tests/ldscript.ld
new file mode 100644
index 0000000..1389dd5
--- /dev/null
+++ b/tests/ldscript.ld
@@ -0,0 +1 @@
+GROUP ( /home/ziyao/Program/musl-tcc/lib/libc.a /usr/local/lib/tcc/libtcc1.a )
diff --git a/tests/pico.c b/tests/pico.c
new file mode 100644
index 0000000..279568c
--- /dev/null
+++ b/tests/pico.c
@@ -0,0 +1,1240 @@
+/*
+ *	This file is not a part of musl-tcc,but a standalone editor which
+ *	is used to check the usability of musl-tcc
+ */
+
+/*** includes ***/
+
+// feature test macro ??
+#define _DEFAULT_SOURCE
+#define _BSD_SOURCE
+#define _GNU_SOURCE
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>  // Input/Output ConTroL
+#include <sys/types.h>
+#include <termios.h>
+#include <time.h>
+#include <unistd.h>
+
+/*** defines ***/
+
+// Cool ascii thing, clearing bits 5 and 6 gets the control sequence associated with that character
+// Also bit five toggles lowercase and uppercase
+#define CTRL_KEY(k) ((k) & 0x1f)
+
+#define PICO_VERSION "0.0.1"
+#define PICO_TAB_STOP 8
+#define PICO_QUIT_TIMES 3
+
+enum EditorKey {
+    BACKSPACE = 127,
+    ARROW_LEFT = 1000,
+    ARROW_RIGHT,
+    ARROW_UP,
+    ARROW_DOWN,
+    DEL_KEY,
+    HOME_KEY,
+    END_KEY,
+    PAGE_UP,
+    PAGE_DOWN,
+};
+
+enum EditorHighlight {
+    HL_NORMAL = 0,
+    HL_COMMENT,
+    HL_MLCOMMENT,
+    HL_KEYWORD1,
+    HL_KEYWORD2,
+    HL_STRING,
+    HL_NUMBER,
+    HL_MATCH
+};
+
+#define HL_HIGHLIGHT_NUMBERS (1<<0)
+#define HL_HIGHLIGHT_STRINGS (1<<1)
+
+/*** data ***/
+
+typedef struct {
+    char* filetype;
+    char** filematch;
+    char** keywords;
+    char* singleline_comment_start;
+    char* multiline_comment_start;
+    char* multiline_comment_end;
+    int flags;
+} EditorSyntax;
+
+typedef struct {
+    int idx;
+    int size;
+    int rsize;  // The size of the render of the row (tabs are more than one character)
+    char *chars;
+    char *render;
+    unsigned char* hl;  // Highlight
+    int hl_open_comment;
+} Row;
+
+struct EditorConfig {
+    int cx, cy;
+    int rx;     // index into the render field
+    int rowoff;
+    int coloff;
+    int screenrows;
+    int screencols;
+    int numrows;
+    Row *row;
+    int dirty;
+    char *filename;
+    char statusmsg[80];
+    time_t statusmsg_time;
+    EditorSyntax* syntax;
+    struct termios orig_termios;
+};
+
+struct EditorConfig E;
+
+/*** filetypes ***/
+
+char* C_HL_extensions[] = { ".c", ".h", ".cpp", NULL };
+char* C_HL_keywords[] = {
+    "switch", "if", "while", "for", "break", "continue", "return", "else", "struct", "union", "typedef", "static", "enum", "case",
+    "int|", "long|", "double|", "float|", "char|", "float|", "unsigned|", "signed|", "void|", NULL
+};
+
+EditorSyntax HLDB[] = {
+    {
+        "c",
+        C_HL_extensions,
+        C_HL_keywords,
+        "//", "/*", "*/",
+        HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
+    }
+};
+
+// HighLight DataBase Entries
+#define HLDB_ENTRIES (sizeof(HLDB) / sizeof(HLDB[0]))
+
+/*** prototypes ***/
+/* c was meant to be compiled in a single pass */
+
+void editor_set_status_message(const char *fmt, ...);
+void editor_refresh_screen();
+char* editor_prompt(char* prompt, void (*callback)(char*, int));
+
+/*** terminal ***/
+
+void die(const char *s) {
+    // Clear screen
+    write(STDOUT_FILENO, "\x1b[2J", 4);
+    write(STDOUT_FILENO, "\x1b[H", 3);
+
+    // Most libc functions that fail set the global errno variable to indicate what the error was.
+    // `perror` looks at errno and prints a descriptive error message for it.
+    // It also prints the given string.
+    perror(s);
+    // Exit with status of 1, indicating error, like an non-zero exit code.
+    exit(1);
+}
+
+void disable_raw_mode() {
+    if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &E.orig_termios) == -1)
+        die("tcsetattr");
+}
+
+void enable_raw_mode() {
+    if (tcgetattr(STDIN_FILENO, &E.orig_termios) == -1)
+        die("tcgetattr");
+    atexit(disable_raw_mode);
+
+    struct termios raw = E.orig_termios;
+
+    // Flags documented with * are usually already off and/or don't apply, but good practices
+
+    // IXON: When on enables C-s and C-q, which involve "software control flow".
+    //      stands for input XON because C-s and C-q are XON and XOFF.
+    // ICRNL: When on enables coercing a \r without a \n to a \n (C-m is \r and C-j is \n).
+    //      stands for input carriage return new line.
+    // *BRKINT: When on a "break condition" will cause a SIGINT signal to be sent.
+    // *INPCK: When on enables parity checking, which doesn't seem to apply to modern terminal emulators.
+    // *ISTRIP: When on enables causes the high bit to be 0 for every input byte.
+    raw.c_iflag &= ~(IXON | ICRNL | BRKINT | INPCK | ISTRIP);
+
+    // OPOST: When on enables output processing, in reality the only feature would be coercing \n into \r\n.
+    //      This means whenever we want a new line we have to do \r\n, otherwise the cursor will not
+    //      go to the start of the line and will just move down.
+    raw.c_oflag &= ~(OPOST);
+
+    // *CS8: not a flag, a mask. Sets the character size to 8=bits per bytes, lmao, imagine needing this.
+    raw.c_cflag |= (CS8);
+
+    // ECHO: When on enables echoing back of input.
+    // ICANON: When on enables reading line by line (we want it byte by byte).
+    // ISIG: When on enables SIGINT and SIGTSTP from C-c and C-z, respectively.
+    //      these are signal interrupt and signal temporary stop.
+    // IEXTEN: When on enables C-v to send another character "literally" (e.g. C-v and C-c would only send a literal 3 and not SIGINT).
+    raw.c_lflag &= ~(ECHO | ICANON | ISIG | IEXTEN);
+
+    // cc stands for control characters
+    // Both measured in tenths of a second.
+
+    // Minimum amount of time before read returns.
+    raw.c_cc[VMIN] = 0;
+    // Maximum amount of time to wait before read returns.
+    //      On time out read() returns 0.
+    raw.c_cc[VTIME] = 1;
+
+    if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1)
+        die("tcsetattr");
+}
+
+int editor_read_key() {
+    // read in character
+    int nread;
+    char c;
+    while ((nread = read(STDIN_FILENO, &c, 1)) != 1) {
+        if (nread == -1 && errno != EAGAIN)
+            die("read");
+    }
+
+    // Process character if escape character
+    if (c == '\x1b') {
+        char seq[3];
+
+        if (read(STDIN_FILENO, &seq[0], 1) != 1) return '\x1b';
+        if (read(STDIN_FILENO, &seq[1], 1) != 1) return '\x1b';
+
+        if (seq[0] == '[') {
+            if (seq[1] >= '0' && seq[1] <= '9') {
+
+                if (read(STDIN_FILENO, &seq[2], 1) != 1) return '\x1b';
+
+                if (seq[2] == '~') {
+                    switch (seq[1]) {
+                        case '1': return HOME_KEY;
+                        case '3': return DEL_KEY;
+                        case '4': return END_KEY;
+                        case '5': return PAGE_UP;
+                        case '6': return PAGE_DOWN;
+                        case '7': return HOME_KEY;
+                        case '8': return END_KEY;
+                    }
+                }
+            } else {
+                switch (seq[1]) {
+                    case 'A': return ARROW_UP;
+                    case 'B': return ARROW_DOWN;
+                    case 'C': return ARROW_RIGHT;
+                    case 'D': return ARROW_LEFT;
+                    case 'H': return HOME_KEY;
+                    case 'F': return END_KEY;
+                }
+            }
+        } else if (seq[0] == 'O') {
+            switch (seq[1]) {
+                case 'H': return HOME_KEY;
+                case 'F': return END_KEY;
+            }
+        }
+
+        return '\x1b';
+
+    } else {
+        return c;
+    }
+}
+
+int get_cursor_position(int *rows, int *cols) {
+    char buf[32];
+    unsigned int i = 0;
+
+    if (write(STDOUT_FILENO, "\x1b[6n", 4) != 4)
+        return -1;
+
+    while (i < sizeof(buf) -1) {
+        if (read(STDIN_FILENO, &buf[i], 1) != 1)
+            break;
+        if (buf[i] == 'R')
+            break;
+        i++;
+    }
+
+    // printf expected a null byte at the end
+    buf[i] = '\0';
+
+    if (buf[0] != '\x1b' || buf[1] != '[')
+        return -1;
+    if (sscanf(&buf[2], "%d;%d", rows, cols) != 2)
+        return -1;
+
+    return 0;
+}
+
+int get_window_size(int *rows, int *cols) {
+    struct winsize ws;
+
+    // Terminal IOCtl Get Window Size
+    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) {
+        if (write(STDOUT_FILENO, "\x1b[999C\x1b[999B", 12) != 12) 
+            return -1;
+        return get_cursor_position(rows, cols);
+    } else {
+        *cols = ws.ws_col;
+        *rows = ws.ws_row;
+        return 0;
+    }
+}
+
+/*** syntax highlighting ***/
+
+int is_separator(int c) {
+    return isspace(c) || c == '\0' || strchr(",.()+-/*=~%<>[];", c) != NULL;
+}
+
+void editor_update_syntax(Row* row) {
+    row->hl = realloc(row->hl, row->rsize);
+    memset(row->hl, HL_NORMAL, row->rsize);
+
+    if (E.syntax == NULL)
+        return;
+
+    char** keywords = E.syntax->keywords;
+
+    char* scs = E.syntax->singleline_comment_start;
+    char* mcs = E.syntax->multiline_comment_start;
+    char* mce = E.syntax->multiline_comment_end;
+
+    int scs_len = scs ? strlen(scs) : 0;
+    int mcs_len = scs ? strlen(mcs) : 0;
+    int mce_len = scs ? strlen(mce) : 0;
+
+    int prev_sep = 1;
+    int in_string = 0;
+    int in_comment = (row->idx > 0 && E.row[row->idx - 1].hl_open_comment);
+
+    int i = 0;
+    while (i < row->rsize) {
+        char c = row->render[i];
+        unsigned char prev_hl = (i > 0) ? row->hl[i - 1] : HL_NORMAL;
+
+        if (scs_len && !in_string && !in_comment) {
+            if (!strncmp(&row->render[i], scs, scs_len)) {
+                memset(&row->hl[i], HL_COMMENT, row->rsize - i);
+                break;
+            }
+        }
+
+        if (mcs_len && mce_len && !in_string) {
+            if (in_comment) {
+                row->hl[i] = HL_MLCOMMENT;
+                if (!strncmp(&row->render[i], mce, mce_len)) {
+                    memset(&row->hl[i], HL_MLCOMMENT, mce_len);
+                    i += mce_len;
+                    in_comment = 0;
+                    prev_sep = 1;
+                    continue;
+                } else {
+                    i++;
+                    continue;
+                }
+            } else if (!strncmp(&row->render[i], mcs, mcs_len)) {
+                memset(&row->hl[i], HL_MLCOMMENT, mcs_len);
+                i += mcs_len;
+                in_comment = 1;
+                continue;
+            }
+        }
+
+        if (E.syntax->flags & HL_HIGHLIGHT_STRINGS) {
+            if (in_string) {
+                row->hl[i] = HL_STRING;
+                // backslash escapes strings
+                if (c == '\\' && i + 1 < row->rsize) {
+                    row->hl[i + 1] = HL_STRING;
+                    i += 2;
+                    continue;
+                }
+                if (c == in_string)
+                    in_string = 0;
+                i++;
+                prev_sep = 1;
+                continue;
+            } else {
+                if (c == '"' || c == '\'') {
+                    in_string = c;
+                    row->hl[i] = HL_STRING;
+                    i++;
+                    continue;
+                }
+            }
+        }
+
+        if (E.syntax->flags & HL_HIGHLIGHT_NUMBERS) {
+            if ( (isdigit(c) && (prev_sep || prev_hl == HL_NUMBER)) || 
+                (c == '.' && prev_hl == HL_NUMBER)
+            ) {
+                row->hl[i] = HL_NUMBER;
+                i++;
+                prev_sep = 0;
+                continue;
+            }
+        }
+
+        if (prev_sep) {
+            int j;
+            for (j = 0; keywords[j]; j++) {
+                int klen = strlen(keywords[j]);
+                int kw2 = keywords[j][klen-1] == '|';
+                if (kw2)
+                    klen--;
+
+                if (
+                    !strncmp(&row->render[i], keywords[j], klen) &&
+                    is_separator(row->render[i + klen])
+                ) {
+                    memset(&row->hl[i], kw2 ? HL_KEYWORD2 : HL_KEYWORD1, klen);
+                    i += klen;
+                    // this break gets us to the if statement to continue
+                    break;
+                }
+            }
+            // Triggered on break
+            if (keywords[j] != NULL) {
+                prev_sep = 0;
+                continue;
+            }
+        }
+
+        prev_sep = is_separator(c);
+        i++;
+    }
+
+    // update next rows if this line has the start of a multiline comment
+    int changed = (row->hl_open_comment != in_comment);
+    row->hl_open_comment = in_comment;
+    if (changed && row->idx + 1 < E.numrows)
+        editor_update_syntax(&E.row[row->idx + 1]);
+}
+
+int editor_syntax_to_color(int hl) {
+    switch (hl) {
+        case HL_COMMENT: 
+        case HL_MLCOMMENT: return 36;
+        case HL_STRING: return 35;
+        case HL_KEYWORD1: return 33;
+        case HL_KEYWORD2: return 32;
+        case HL_NUMBER: return 31;
+        case HL_MATCH: return 34;
+        default: return 37;
+    }
+}
+
+void editor_select_syntax_highlight() {
+    E.syntax = NULL;
+    if (E.filename == NULL)
+        return;
+
+    char* ext = strrchr(E.filename, '.');
+
+    for (unsigned int j = 0; j < HLDB_ENTRIES; j++) {
+        EditorSyntax* s = &HLDB[j];
+        unsigned int i = 0;
+        while (s->filematch[i]) {
+            int is_ext = (s->filematch[i][0] == '.');
+            if (
+                (is_ext && ext && !strcmp(ext, s->filematch[i])) ||
+                (!is_ext && strstr(E.filename, s->filematch[i]))
+            ) {
+                E.syntax = s;
+
+                int filerow;
+                for (filerow = 0; filerow < E.numrows; filerow++) {
+                    editor_update_syntax(&E.row[filerow]);
+                }
+
+                return;
+            }
+            i++;
+        }
+    }
+}
+
+/*** row operations ***/
+
+int editor_row_cx_to_rx(Row *row, int cx) {
+    int rx = 0;
+    int j;
+    for (j = 0; j < cx; j++) {
+        if (row->chars[j] == '\t')
+            rx += (PICO_TAB_STOP - 1) - (rx % PICO_TAB_STOP);
+        rx++;
+    }
+    return rx;
+}
+
+int editor_row_rx_to_cx(Row* row, int rx) {
+    int cur_rx = 0;
+    int cx;
+    for (cx = 0; cx < row->size; cx++) {
+        if (row->chars[cx] == '\t') {
+            cur_rx += (PICO_TAB_STOP - 1) - (cur_rx % PICO_TAB_STOP);
+        }
+        cur_rx++;
+
+        if (cur_rx > rx)
+            return cx;
+    }
+
+    return cx;
+}
+
+void editor_update_row(Row* row) {
+    // used for iteration twice
+    int j;
+
+    int tabs = 0;
+    for (j = 0; j < row->size; j++)
+        if (row->chars[j] == '\t') 
+            tabs++;
+
+    free(row->render);
+    row->render = malloc(row->size + tabs * (PICO_TAB_STOP - 1) + 1);
+
+    int idx = 0;
+    for (j = 0; j < row->size; j++) {
+        if (row->chars[j] == '\t') {
+            row->render[idx++] = ' ';
+            // get us to the next tab spot
+            while (idx % PICO_TAB_STOP != 0) row->render[idx++] = ' ';
+        } else {
+            row->render[idx++] = row->chars[j];
+        }
+    }
+    row->render[idx] = '\0';
+    row->rsize = idx;
+
+    editor_update_syntax(row);
+}
+
+void editor_insert_row(int at, char* s, size_t len) {
+    if (at < 0 || at > E.numrows)
+        return;
+
+    // Allocate space for the new row
+    E.row = realloc(E.row, sizeof(Row) * (E.numrows + 1));
+    memmove(&E.row[at + 1], &E.row[at], sizeof(Row) * (E.numrows - at));
+    for (int j = at + 1; j <= E.numrows; j++)
+        E.row[j].idx++;
+
+    E.row[at].idx = at;
+
+    E.row[at].size = len;
+    E.row[at].chars = malloc(len + 1);
+    memcpy(E.row[at].chars, s, len);
+    E.row[at].chars[len] = '\0';
+
+    E.row[at].rsize = 0;
+    E.row[at].render = NULL;
+    E.row[at].hl = NULL;
+    E.row[at].hl_open_comment = 0;
+    editor_update_row(&E.row[at]);
+
+    E.numrows++;
+    E.dirty++;
+}
+
+void editor_free_row(Row* row) {
+    free(row->render);
+    free(row->chars);
+    free(row->hl);
+}
+
+void editor_del_row(int at) {
+    if (at < 0 || at >= E.numrows)
+        return;
+    editor_free_row(&E.row[at]);
+    memmove(&E.row[at], &E.row[at + 1], sizeof(Row) * (E.numrows - at - 1));
+    for (int j = at; j < E.numrows - 1; j++)
+        E.row[j].idx--;
+
+    E.numrows--;
+    E.dirty++;
+}
+
+void editor_row_insert_char(Row* row, int at, int c) {
+    if (at < 0 || at > row->size) 
+        at = row->size;
+    // allocate one more byte for the new character, and one more byte for the null byte
+    row->chars = realloc(row->chars, row->size + 2);
+    // like memcpy, but safe to use if the source and destination places overlap
+    memmove(&row->chars[at + 1], &row->chars[at], row->size - at + 1);
+    row->size++;
+    row->chars[at] = c;
+    editor_update_row(row);
+    E.dirty++;
+}
+
+void editor_row_append_string(Row* row, char* s, size_t len) {
+    row->chars = realloc(row->chars, row->size + len + 1);
+    memcpy(&row->chars[row->size], s, len);
+    row->size += len;
+    row->chars[row->size] = '\0';
+    editor_update_row(row);
+    E.dirty++;
+}
+
+void editor_row_del_char(Row* row, int at) {
+    if (at < 0 || at >= row->size)
+        return;
+    // include the NULL byte!
+    memmove(&row->chars[at], &row->chars[at + 1], row->size - at);
+    row->size--;
+    editor_update_row(row);
+    E.dirty++;
+}
+
+/*** editor operations ***/
+
+void editor_insert_char(int c) {
+    if (E.cy == E.numrows) {
+        editor_insert_row(E.numrows, "", 0);
+    }
+    editor_row_insert_char(&E.row[E.cy], E.cx, c);
+    E.cx++;
+}
+
+void editor_insert_newline() {
+    if (E.cx == 0) {
+        editor_insert_row(E.cy, "", 0);
+    } else {
+        Row* row = &E.row[E.cy];
+        editor_insert_row(E.cy + 1, &row->chars[E.cx], row->size - E.cx);
+        // Reassign because memmove might invalidate it (uhhhhh)
+        row = &E.row[E.cy];
+        row->size = E.cx;
+        row->chars[row->size] = '\0';
+        editor_update_row(row);
+    }
+    E.cy++;
+    E.cx = 0;
+}
+
+void editor_del_char() {
+    if (E.cy == E.numrows)
+        return;
+    if (E.cx == 0 && E.cy == 0)
+        return;
+
+    Row* row = &E.row[E.cy];
+    if (E.cx > 0) {
+        editor_row_del_char(row, E.cx - 1);
+        E.cx--;
+    } else {
+        E.cx = E.row[E.cy - 1].size;
+        editor_row_append_string(&E.row[E.cy - 1], row->chars, row->size);
+        editor_del_row(E.cy);
+        E.cy--;
+    }
+}
+
+/*** file i/o ***/
+
+// Returns a string of all the rows
+// also modifies buflen to be the length of the string
+char* editor_rows_to_string(int* buflen) {
+    int totlen = 0;
+    int j;
+    for (j = 0; j < E.numrows; j++) {
+        totlen += E.row[j].size + 1;
+    }
+    *buflen = totlen;
+
+    char* buf = malloc(totlen);
+    char* p = buf;
+    for (j = 0; j < E.numrows; j++) {
+        memcpy(p, E.row[j].chars, E.row[j].size);
+        p += E.row[j].size;
+        *p = '\n';
+        p++;
+    }
+
+    return buf;
+}
+
+void editor_open(char *filename) {
+    free(E.filename);
+    E.filename = strdup(filename);
+
+    editor_select_syntax_highlight();
+
+    FILE *fp = fopen(filename, "r");
+    if (!fp) die("fopen");
+
+    char *line = NULL;
+    size_t linecap = 0;     // This type is used for sizes of objects
+    ssize_t linelen;        // This type is used for indicating errors (and also success ig)
+
+    // Read line from file into `line` into buffer of current size `linecap` from `fp`.
+    while ((linelen = getline(&line, &linecap, fp)) != -1) {
+
+        // strip \r and \n
+        while (linelen > 0 && (line[linelen - 1] == '\n' || line[linelen - 1] == '\r'))
+            linelen--;
+
+        editor_insert_row(E.numrows, line, linelen);
+    }
+
+    free(line);
+    fclose(fp);
+    E.dirty = 0;
+}
+
+void editor_save() {
+    if (E.filename == NULL) {
+        E.filename = editor_prompt("Save as: %s", NULL);
+        if (E.filename == NULL) {
+            editor_set_status_message("Save aborted");
+            return;
+        }
+        editor_select_syntax_highlight();
+    }
+
+    int len;
+    char* buf = editor_rows_to_string(&len);
+
+    // 0644 is file perms, user read/write, group read
+    int fd = open(E.filename, O_RDWR | O_CREAT, 0644);
+
+    if (fd != -1) {
+        // will cut off excess, or add 0 until file is of length len
+        // by using ftruncate and not the O_TRUNC flag for open() (which automatically clears the file)
+        // we keep the old file if the write fails, but the open doesn't
+        // If we were cooler, we'd write to another file, and only if everything is good, rename it
+        if (ftruncate(fd, len) != 1) {
+            if (write(fd, buf, len) == len) {
+                close(fd);
+                free(buf);
+                E.dirty = 0;
+                editor_set_status_message("%d bytes written to disk", len);
+                return;
+            }
+        }
+        close(fd);
+    }
+    free(buf);
+    editor_set_status_message("Can't save! I/O error: %s", strerror(errno));
+}
+
+/*** find ***/
+
+void editor_find_callback(char* query, int key) {
+    static int last_match = -1;
+    static int direction = 1;
+
+    static int saved_hl_line;
+    static char* saved_hl = NULL;
+
+    if (saved_hl) {
+        memcpy(E.row[saved_hl_line].hl, saved_hl, E.row[saved_hl_line].rsize);
+        free(saved_hl);
+        saved_hl = NULL;
+    }
+
+    if (key == '\r' || key == '\x1b') {
+        last_match = -1;
+        direction = 1;
+        return;
+    } else if (key == ARROW_RIGHT || key == ARROW_DOWN) {
+        direction = 1;
+    } else if (key == ARROW_LEFT || key == ARROW_UP) {
+        direction = -1;
+    } else {
+        last_match = -1;
+        direction = 1;
+    }
+
+    if (last_match == -1)
+        direction = 1;
+    int current = last_match;
+
+    int i;
+    for (i = 0; i < E.numrows; i++) {
+        // start from last match and wrap around
+        current += direction;
+        if (current == -1)
+            current = E.numrows - 1;
+        else if (current == E.numrows) 
+            current = 0;
+
+        Row* row = &E.row[current];
+        char* match = strstr(row->render, query);
+        if (match) {
+            last_match = current;
+            E.cy = current;
+            E.cx = editor_row_rx_to_cx(row, match - row->render);
+            E.rowoff = E.numrows;
+
+            saved_hl_line = current;
+            saved_hl = malloc(row->rsize);
+            memcpy(saved_hl, row->hl, row->rsize);
+            memset(&row->hl[match - row->render], HL_MATCH, strlen(query));
+            break;
+        }
+    }
+}
+
+void editor_find() {
+    int saved_cx = E.cx;
+    int saved_cy = E.cy;
+    int saved_coloff = E.coloff;
+    int saved_rowoff = E.rowoff;
+    char* query = editor_prompt("Search: %s", editor_find_callback);
+
+    if (query) {
+        free(query);
+    } else {
+        E.cx = saved_cx;
+        E.cy = saved_cy;
+        E.coloff = saved_coloff;
+        E.rowoff = saved_rowoff;
+    }
+}
+
+/*** append buffer ***/
+
+// Avoid many small calls to write
+typedef struct {
+    char *b;
+    int len;
+} AppendBuf;
+
+#define ABUF_INIT {NULL, 0}
+
+void ab_append(AppendBuf *ab, const char *s, int len) {
+    char *new = realloc(ab->b, ab->len + len);
+
+    if (new == NULL)
+        return;
+
+    memcpy(&new[ab->len], s, len);
+    ab->b = new;
+    ab->len += len;
+}
+
+void abFree(AppendBuf *ab) {
+    free(ab->b);
+}
+
+/*** input ***/
+
+// callback function called after every keypress
+char* editor_prompt(char* prompt, void (*callback)(char*, int)) {
+    size_t bufsize = 128;
+    char* buf = malloc(bufsize);
+
+    size_t buflen = 0;
+    buf[0] = '\0';
+
+    for (;;) {
+        editor_set_status_message(prompt, buf);
+        editor_refresh_screen();
+
+        int c = editor_read_key();
+        if (c == DEL_KEY || c == CTRL_KEY('h') || c == BACKSPACE) {
+            if (buflen != 0)
+                buf[--buflen] = '\0';
+        } else if (c == '\x1b') {
+            // escape
+            editor_set_status_message("");
+            if (callback)
+                callback(buf, c);
+            free(buf);
+            return NULL;
+        } else if (c == '\r') {
+            if (buflen != 0) {
+                editor_set_status_message("");
+                if (callback)
+                    callback(buf, c);
+                return buf;
+            }
+        } else if (!iscntrl(c) && c < 128) {
+            if (buflen == bufsize - 1) {
+                bufsize *= 2;
+                buf = realloc(buf, bufsize);
+            }
+            buf[buflen++] = c;
+            buf[buflen] = '\0';
+        }
+
+        if (callback)
+            callback(buf, c);
+    }
+}
+
+void editor_move_cursor(int key) {
+    Row *row = (E.cy >= E.numrows) ? NULL : &E.row[E.cy];
+
+    switch (key) {
+        case ARROW_LEFT:
+            if (E.cx != 0) {
+                E.cx--;
+            } else if (E.cy > 0) {
+                E.cy--;
+                E.cx = E.row[E.cy].size;
+            }
+            break;
+        case ARROW_RIGHT:
+            if (row && E.cx < row->size) {
+                E.cx++;
+            } else if (row && E.cx == row->size) {
+                E.cy++;
+                E.cx = 0;
+            }
+            break;
+        case ARROW_UP:
+            if (E.cy != 0) {
+                E.cy--;
+            }
+            break;
+        case ARROW_DOWN:
+            if (E.cy < E.numrows) {
+                E.cy++;
+            }
+            break;
+    }
+
+    // Correct row if we moved down/up to a row that was shorter
+    row = (E.cy >= E.numrows) ? NULL : &E.row[E.cy];
+    int rowlen = row ? row->size : 0;
+    if (E.cx > rowlen) {
+        E.cx = rowlen;
+    }
+}
+
+void editor_process_keypress() {
+    static int quit_times = PICO_QUIT_TIMES;
+
+    int c = editor_read_key();
+    switch (c) {
+        case '\r':
+            editor_insert_newline();
+            break;
+
+        case CTRL_KEY('q'):
+            if (E.dirty && quit_times > 0) {
+                editor_set_status_message("WARNING!!! File has unsaved changes. "
+                        "Press Ctrl-Q %d more times to quit.", quit_times);
+                quit_times--;
+                // We return so that the quit number reset at the end of the function
+                // doesn't happen
+                return;
+            }
+
+            // Clear screen
+            write(STDOUT_FILENO, "\x1b[2J", 4);
+            write(STDOUT_FILENO, "\x1b[H", 3);
+            // exit
+            exit(0);
+            break;
+
+        case CTRL_KEY('s'):
+            editor_save();
+            break;
+
+        case HOME_KEY:
+            E.cx = 0;
+            break;
+        case END_KEY:
+            if (E.cy < E.numrows)
+                E.cx = E.row[E.cy].size;
+            break;
+
+        case CTRL_KEY('f'):
+            editor_find();
+            break;
+
+        case BACKSPACE:
+        case CTRL_KEY('h'):
+        case DEL_KEY:
+            if (c == DEL_KEY)
+                editor_move_cursor(ARROW_RIGHT);
+            editor_del_char();
+            break;
+
+        case PAGE_UP:
+        case PAGE_DOWN:
+            // Create code block so that we can delcare a variable
+            {
+                if (c == PAGE_UP) {
+                    E.cy = E.rowoff;
+                } else if (c == PAGE_DOWN) {
+                    E.cy = E.rowoff + E.screenrows - 1;
+                    if (E.cy > E.numrows) E.cy = E.numrows;
+                }
+
+                int times = E.screenrows;
+                while (times--)
+                    editor_move_cursor(c == PAGE_UP ? ARROW_UP : ARROW_DOWN);
+            }
+            break;
+
+        case ARROW_LEFT:
+        case ARROW_RIGHT:
+        case ARROW_UP:
+        case ARROW_DOWN:
+            editor_move_cursor(c);
+            break;
+
+        case CTRL_KEY('l'):
+        case '\x1b':
+            break;
+
+        default:
+            editor_insert_char(c);
+            break;
+    }
+
+    quit_times = PICO_QUIT_TIMES;
+}
+
+/*** output ***/
+
+void editor_scroll() {
+    E.rx = 0;
+    if (E.cy < E.numrows) {
+        E.rx = editor_row_cx_to_rx(&E.row[E.cy], E.cx);
+    }
+
+    if (E.cy < E.rowoff) {
+        E.rowoff = E.cy;
+    }
+    if (E.cy >= E.rowoff + E.screenrows) {
+        E.rowoff = E.cy - E.screenrows + 1;
+    }
+    if (E.rx < E.coloff) {
+        E.coloff = E.rx;
+    }
+    if (E.rx >= E.coloff + E.screencols) {
+        E.coloff = E.rx - E.screencols + 1;
+    }
+}
+
+void editor_draw_rows(AppendBuf *ab) {
+    int y;
+    for (y = 0; y < E.screenrows; y++) {
+        int filerow = y + E.rowoff;
+        // I think the tutorial as `>=` here but it drew an extra tilde for me and now it just
+        // has a blank line for appending a line to the file which is much better.
+        // Is this undefined behavior or correct code ?!?!
+        // It was UB...     the bug is still here... Only crashes with no file input
+        if (filerow >= E.numrows) {
+            if (E.numrows == 0 && filerow == E.screenrows / 3) {
+                // Create welcome message
+                char welcome[80];
+                int welcomelen = snprintf(welcome, sizeof(welcome), "Pico editor -- version %s", PICO_VERSION);
+                if (welcomelen > E.screencols) welcomelen = E.screencols;
+
+                // Add padding
+                int padding = (E.screencols - welcomelen) / 2;
+                if (padding) {
+                    ab_append(ab, "~", 1);
+                    padding--;
+                }
+                while (padding--)
+                    ab_append(ab, " ", 1);
+
+                ab_append(ab, welcome, welcomelen);
+
+            // THIS SEEMED TO FIX IT!!!!!
+            // used to just be else
+            } else if (E.numrows == 0 || filerow == E.screenrows) {
+                ab_append(ab, "~", 1);
+            }
+        } else {
+            // Otherwise print the text at the yth row
+            int len = E.row[filerow].rsize - E.coloff;
+            if (len < 0) 
+                len = 0;
+            if (len > E.screencols) 
+                len = E.screencols;
+
+            char* c = &E.row[filerow].render[E.coloff];
+            unsigned char* hl = &E.row[filerow].hl[E.coloff];
+            // -1 indicates the default color
+            int current_color = -1;
+
+            int j;
+            for (j = 0; j < len; j++) {
+                if (iscntrl(c[j])) {
+                    // Non-printable characters
+                    // Capital letters come after the '@' character
+                    char sym = (c[j] <= 26) ? '@' + c[j] : '?';
+                    // invert colors for printing
+                    ab_append(ab, "\x1b[7m", 4);
+                    ab_append(ab, &sym, 1);
+                    ab_append(ab, "\x1b[m", 3);
+                    if (current_color != -1) {
+                        char buf[16];
+                        int clen = snprintf(buf, sizeof(buf), "\x1b[%dm", current_color);
+                        ab_append(ab, buf, clen);
+                    }
+                } else if (hl[j] == HL_NORMAL) {
+                    if (current_color != -1) {
+                        ab_append(ab, "\x1b[39m", 5);
+                        current_color = -1;
+                    }
+                    ab_append(ab, &c[j], 1);
+                } else {
+                    int color = editor_syntax_to_color(hl[j]);
+                    if (color != current_color) {
+                        current_color = color;
+                        char buf[16];
+                        int clen = snprintf(buf, sizeof(buf), "\x1b[%dm", color);
+                        ab_append(ab, buf, clen);
+                    }
+                    ab_append(ab, &c[j], 1);
+                }
+            }
+            ab_append(ab, "\x1b[39m", 5);
+        }
+
+        ab_append(ab, "\x1b[K", 3);
+        ab_append(ab, "\r\n", 2);
+    }
+}
+
+void editor_draw_status_bar(AppendBuf *ab) {
+    // inverted colors
+    ab_append(ab, "\x1b[7m", 4);
+
+    char status[80], rstatus[80];
+    int len = snprintf(status, sizeof(status), "%.20s - %d lines %s", 
+        E.filename ? E.filename : "[No Name]", 
+        E.numrows,
+        E.dirty ? "(modified)" : "");
+    int rlen = snprintf(rstatus, sizeof(rstatus), "%s | %d/%d", 
+            E.syntax ? E.syntax->filetype : "no ft",
+            E.cy + 1, 
+            E.numrows);
+
+    if (len > E.screencols) len = E.screencols;
+
+    ab_append(ab, status, len);
+
+    // Fill with spaces until right aligned line numbers
+    while (len < E.screencols) {
+        if (E.screencols - len == rlen) {
+            ab_append(ab, rstatus, rlen);
+            break;
+        } else {
+            ab_append(ab, " ", 1);
+            len++;
+        }
+    }
+
+    // normal text formatting
+    ab_append(ab, "\x1b[m", 3);
+    ab_append(ab, "\r\n", 2);
+}
+
+void editor_draw_message_bar(AppendBuf *ab) {
+    ab_append(ab, "\x1b[K", 3);
+    int msglen = strlen(E.statusmsg);
+    if (msglen > E.screencols) msglen = E.screencols;
+    if (msglen && time(NULL) - E.statusmsg_time < 5)
+        ab_append(ab, E.statusmsg, msglen);
+}
+
+void editor_refresh_screen() {
+    editor_scroll();
+
+    AppendBuf ab = ABUF_INIT;
+
+    // Hide the cursor
+    ab_append(&ab, "\x1b[?25l", 6);
+
+    // 0x1b is 27 in hexidecimal which is the escape character
+    // the other three bytes are "[2j"
+    // Escape sequences start with an escape character (\x1b)
+    // and then '['. They instruct the terminal to do various things.
+    // 'J' is erase and '2' means to erase the entire screen (0 is default argument).
+    // `ab_append(&ab, "\x1b[2J", 4);`
+
+    // The 3 means write four bytes
+    // 'H' is the cursor position command.
+    // takes 2 arguments we could use "\x1b[12;40H" to move the curosr to the 12th row and 40th col
+    // multiple arguments are separated by a ';'. Default arguments are 1 and 1.
+    ab_append(&ab, "\x1b[H", 3);
+
+    editor_draw_rows(&ab);
+    editor_draw_status_bar(&ab);
+    editor_draw_message_bar(&ab);
+
+    // move cursor
+    char buf[32];
+    snprintf(buf, sizeof(buf), "\x1b[%d;%dH", (E.cy - E.rowoff) + 1, (E.rx - E.coloff) + 1);
+    ab_append(&ab, buf, strlen(buf));
+
+    // Show the cursor
+    ab_append(&ab, "\x1b[?25h", 6);
+
+    write(STDOUT_FILENO, ab.b, ab.len);
+    abFree(&ab);
+}
+
+// This is how you do variable arguments in C, this is now a "variadic function"
+// All the cool va shit comes from <stdarg.h>
+// printf comes from <stdio.h> and time, obviously <time.h>
+void editor_set_status_message(const char *fmt, ...) {
+    va_list ap;
+    va_start(ap, fmt);
+    vsnprintf(E.statusmsg, sizeof(E.statusmsg), fmt, ap);
+    va_end(ap);
+    E.statusmsg_time = time(NULL);
+}
+
+/*** init ***/
+
+void editor_init() {
+    E.cx = 0;
+    E.cy = 0;
+    E.rx = 0;
+    E.rowoff = 0;
+    E.coloff = 0;
+    E.numrows = 0;
+    E.row = NULL;
+    E.dirty = 0;
+    E.filename = NULL;
+    E.statusmsg[0] = '\0';
+    E.statusmsg_time = 0;
+    E.syntax = NULL;
+
+    if (get_window_size(&E.screenrows, &E.screencols) == -1)
+        die("get_window_size");
+
+    E.screenrows -= 2;
+}
+
+int main(int arc, char *argv[]) {
+    enable_raw_mode();
+    editor_init();
+    if (arc >= 2) {
+        editor_open(argv[1]);
+    }
+
+    editor_set_status_message("HELP: Ctrl-S to save | Ctrl-Q to quit | Ctrl-F to find");
+
+    for (;;) {
+        editor_refresh_screen();
+        editor_process_keypress();
+    }
+
+    return 0;
+}
diff --git a/tests/printf.c b/tests/printf.c
new file mode 100644
index 0000000..512154a
--- /dev/null
+++ b/tests/printf.c
@@ -0,0 +1,7 @@
+#include<stdio.h>
+
+int main(void)
+{
+	printf("%d\nHello World\n",1);
+	return 0;
+}