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Diffstat (limited to 'toys/other/hexedit.c')
-rw-r--r--toys/other/hexedit.c291
1 files changed, 206 insertions, 85 deletions
diff --git a/toys/other/hexedit.c b/toys/other/hexedit.c
index 4b628463..398ec15d 100644
--- a/toys/other/hexedit.c
+++ b/toys/other/hexedit.c
@@ -10,18 +10,21 @@ config HEXEDIT
bool "hexedit"
default y
help
- usage: hexedit FILENAME
+ usage: hexedit FILE
- Hexadecimal file editor. All changes are written to disk immediately.
+ Hexadecimal file editor/viewer. All changes are written to disk immediately.
-r Read only (display but don't edit)
Keys:
- Arrows Move left/right/up/down by one line/column
- Pg Up/Pg Dn Move up/down by one page
- 0-9, a-f Change current half-byte to hexadecimal value
- u Undo
- q/^c/^d/<esc> Quit
+ Arrows Move left/right/up/down by one line/column
+ PgUp/PgDn Move up/down by one page
+ Home/End Start/end of line (start/end of file with ctrl)
+ 0-9, a-f Change current half-byte to hexadecimal value
+ ^J or : Jump (+/- for relative offset, otherwise absolute address)
+ ^F or / Find string (^G/n: next, ^D/p: previous match)
+ u Undo
+ q/^C/^Q/Esc Quit
*/
#define FOR_hexedit
@@ -31,39 +34,83 @@ GLOBALS(
char *data;
long long len, base;
int numlen, undo, undolen;
- unsigned height;
+ unsigned rows, cols;
+ long long pos;
+ char keybuf[16];
+ char input[80];
+ char *search;
)
#define UNDO_LEN (sizeof(toybuf)/(sizeof(long long)+1))
-// Render all characters printable, using color to distinguish.
-static int draw_char(FILE *fp, wchar_t broiled)
+static void show_error(char *what)
{
- if (fp) {
- if (broiled<32 || broiled>=127) {
- if (broiled>127) {
- tty_esc("2m");
- broiled &= 127;
- }
- if (broiled<32 || broiled==127) {
- tty_esc("7m");
- if (broiled==127) broiled = 32;
- else broiled += 64;
- }
- printf("%c", (int)broiled);
- tty_esc("0m");
- } else printf("%c", (int)broiled);
+ tty_jump(0, TT.rows);
+ printf("\e[41m\e[37m\e[K\e[1m%s\e[0m", what);
+ xflush(1);
+ msleep(500);
+}
+
+// TODO: support arrow keys, insertion, and scrolling (and reuse in vi)
+static int prompt(char *prompt, char *initial_value)
+{
+ int yes = 0, key, len = strlen(initial_value);
+
+ strcpy(TT.input, initial_value);
+ while (1) {
+ tty_jump(0, TT.rows);
+ tty_esc("K");
+ printf("\e[1m%s: \e[0m%s", prompt, TT.input);
+ tty_esc("?25h");
+ xflush(1);
+
+ key = scan_key(TT.keybuf, -1);
+ if (key < 0 || key == 27) break;
+ if (key == '\r') {
+ yes = len; // Hitting enter with no input counts as cancellation.
+ break;
+ }
+
+ if (key == 0x7f) {
+ if (len > 0) TT.input[--len] = 0;
+ } else if (key == 'U'-'@') {
+ while (len > 0) TT.input[--len] = 0;
+ } else if (key >= ' ' && key < 0x7f && len < sizeof(TT.input)) {
+ TT.input[len++] = key;
+ }
}
- return 1;
+ tty_esc("?25l");
+ return yes;
+}
+
+// Render all characters printable, using color to distinguish.
+static void draw_char(int ch)
+{
+ if (ch >= ' ' && ch < 0x7f) putchar(ch);
+ else {
+ if (ch < ' ') printf("\e[31m%c", ch + '@');
+ else printf("\e[35m?");
+ }
+ printf("\e[0m");
}
-static void draw_tail(void)
+static void draw_status(void)
{
- tty_jump(0, TT.height);
+ char line[80];
+
+ tty_jump(0, TT.rows);
tty_esc("K");
- draw_trim(*toys.optargs, -1, 71);
+ snprintf(line, sizeof(line), "\"%s\"%s, %#llx/%#llx", *toys.optargs,
+ FLAG(r) ? " [readonly]" : "", TT.pos, TT.len);
+ draw_trim(line, -1, TT.cols);
+}
+
+static void draw_byte(int byte)
+{
+ if (byte) printf("%02x", byte);
+ else printf("\e[2m00\e[0m");
}
static void draw_line(long long yy)
@@ -74,10 +121,13 @@ static void draw_line(long long yy)
if (yy+xx>=TT.len) xx = TT.len-yy;
if (yy<TT.len) {
- printf("\r%0*llX ", TT.numlen, yy);
- for (x=0; x<xx; x++) printf(" %02X", TT.data[yy+x]);
+ printf("\r\e[33m%0*llx\e[0m ", TT.numlen, yy);
+ for (x=0; x<xx; x++) {
+ putchar(' ');
+ draw_byte(TT.data[yy+x]);
+ }
printf("%*s", 2+3*(16-xx), "");
- for (x=0; x<xx; x++) draw_char(stdout, TT.data[yy+x]);
+ for (x=0; x<xx; x++) draw_char(TT.data[yy+x]);
printf("%*s", 16-xx, "");
}
tty_esc("K");
@@ -88,11 +138,11 @@ static void draw_page(void)
int y;
tty_jump(0, 0);
- for (y = 0; y<TT.height; y++) {
+ for (y = 0; y<TT.rows; y++) {
if (y) printf("\r\n");
draw_line(y);
}
- draw_tail();
+ draw_status();
}
// side: 0 = editing left, 1 = editing right, 2 = clear, 3 = read only
@@ -101,115 +151,177 @@ static void highlight(int xx, int yy, int side)
char cc = TT.data[16*(TT.base+yy)+xx];
int i;
- // Display cursor
+ // Display cursor in hex area.
tty_jump(2+TT.numlen+3*xx, yy);
tty_esc("0m");
if (side!=2) tty_esc("7m");
- if (side>1) printf("%02X", cc);
+ if (side>1) draw_byte(cc);
else for (i=0; i<2;) {
if (side==i) tty_esc("32m");
- printf("%X", (cc>>(4*(1&++i)))&15);
+ printf("%x", (cc>>(4*(1&++i)))&15);
}
- tty_esc("0m");
tty_jump(TT.numlen+17*3+xx, yy);
- draw_char(stdout, cc);
+
+ // Display cursor in text area.
+ if (side!=2) tty_esc("7m");
+ draw_char(cc);
}
-void hexedit_main(void)
+static void find_next(int pos)
{
- long long pos = 0, y;
- int x, i, side = 0, key, ro = toys.optflags&FLAG_r,
- fd = xopen(*toys.optargs, ro ? O_RDONLY : O_RDWR);
- char keybuf[16];
+ char *p;
- *keybuf = 0;
+ p = memmem(TT.data+pos, TT.len-pos, TT.search, strlen(TT.search));
+ if (p) TT.pos = p - TT.data;
+ else show_error("No match!");
+}
+
+static void find_prev(int pos)
+{
+ size_t len = strlen(TT.search);
+
+ for (; pos >= 0; pos--) {
+ if (!memcmp(TT.data+pos, TT.search, len)) {
+ TT.pos = pos;
+ return;
+ }
+ }
+ show_error("No match!");
+}
+
+void hexedit_main(void)
+{
+ long long y;
+ int x, i, side = 0, key, fd;
// Terminal setup
- TT.height = 25;
- terminal_size(0, &TT.height);
- if (TT.height) TT.height--;
+ TT.cols = 80;
+ TT.rows = 24;
+ terminal_size(&TT.cols, &TT.rows);
+ if (TT.rows) TT.rows--;
+ xsignal(SIGWINCH, generic_signal);
sigatexit(tty_sigreset);
tty_esc("0m");
tty_esc("?25l");
- fflush(0);
+ xflush(1);
xset_terminal(1, 1, 0, 0);
+ if (access(*toys.optargs, W_OK)) toys.optflags |= FLAG_r;
+ fd = xopen(*toys.optargs, FLAG(r) ? O_RDONLY : O_RDWR);
if ((TT.len = fdlength(fd))<1) error_exit("bad length");
if (sizeof(long)==32 && TT.len>SIZE_MAX) TT.len = SIZE_MAX;
// count file length hex in digits, rounded up to multiple of 4
- for (pos = TT.len, TT.numlen = 0; pos; pos >>= 4, TT.numlen++);
+ for (TT.pos = TT.len, TT.numlen = 0; TT.pos; TT.pos >>= 4, TT.numlen++);
TT.numlen += (4-TT.numlen)&3;
- TT.data = xmmap(0, TT.len, PROT_READ|(PROT_WRITE*!ro), MAP_SHARED, fd, 0);
+ TT.data=xmmap(0, TT.len, PROT_READ|(PROT_WRITE*!FLAG(r)), MAP_SHARED, fd, 0);
+ close(fd);
draw_page();
for (;;) {
// Scroll display if necessary
- if (pos<0) pos = 0;
- if (pos>=TT.len) pos = TT.len-1;
- x = pos&15;
- y = pos/16;
+ if (TT.pos<0) TT.pos = 0;
+ if (TT.pos>=TT.len) TT.pos = TT.len-1;
+ x = TT.pos&15;
+ y = TT.pos/16;
- i = 0;
while (y<TT.base) {
- if (TT.base-y>(TT.height/2)) {
+ if (TT.base-y>(TT.rows/2)) {
TT.base = y;
draw_page();
} else {
TT.base--;
- i++;
tty_jump(0, 0);
tty_esc("1L");
draw_line(0);
}
}
- while (y>=TT.base+TT.height) {
- if (y-(TT.base+TT.height)>(TT.height/2)) {
- TT.base = y-TT.height-1;
+ while (y>=TT.base+TT.rows) {
+ if (y-(TT.base+TT.rows)>(TT.rows/2)) {
+ TT.base = y-TT.rows-1;
draw_page();
} else {
TT.base++;
- i++;
tty_jump(0, 0);
tty_esc("1M");
- tty_jump(0, TT.height-1);
- draw_line(TT.height-1);
+ tty_jump(0, TT.rows-1);
+ draw_line(TT.rows-1);
}
}
- if (i) draw_tail();
+ draw_status();
y -= TT.base;
// Display cursor and flush output
- highlight(x, y, ro ? 3 : side);
+ highlight(x, y, FLAG(r) ? 3 : side);
xflush(1);
// Wait for next key
- key = scan_key(keybuf, -1);
- // Exit for q, ctrl-c, ctrl-d, escape, or EOF
- if (key==-1 || key==3 || key==4 || key==27 || key=='q') break;
+ key = scan_key(TT.keybuf, -1);
+
+ // Window resized?
+ if (key == -3) {
+ toys.signal = 0;
+ terminal_size(&TT.cols, &TT.rows);
+ if (TT.rows) TT.rows--;
+ draw_page();
+ continue;
+ }
+
+ // Various popular ways to quit...
+ if (key==-1||key==('C'-'@')||key==('Q'-'@')||key==27||key=='q') break;
+ highlight(x, y, 2);
+
+ if (key == ('J'-'@') || key == ':' || key == '-' || key == '+') {
+ // Jump (relative or absolute)
+ char initial[2] = {}, *s = 0;
+ long long val;
+
+ if (key == '-' || key == '+') *initial = key;
+ if (!prompt("Jump to", initial)) continue;
+
+ val = estrtol(TT.input, &s, 0);
+ if (!errno && s && !*s) {
+ if (*TT.input == '-' || *TT.input == '+') TT.pos += val;
+ else TT.pos = val;
+ }
+ continue;
+ } else if (key == ('F'-'@') || key == '/') { // Find
+ if (!prompt("Find", TT.search ? TT.search : "")) continue;
+
+ // TODO: parse hex escapes in input, and record length to support \0
+ free(TT.search);
+ TT.search = xstrdup(TT.input);
+ find_next(TT.pos);
+ } else if (TT.search && (key == ('G'-'@') || key == 'n')) { // Find next
+ if (TT.pos < TT.len) find_next(TT.pos+1);
+ } else if (TT.search && (key == ('D'-'@') || key == 'p')) { // Find previous
+ if (TT.pos > 0) find_prev(TT.pos-1);
+ }
+
+ // Remove cursor
highlight(x, y, 2);
// Hex digit?
if (key>='a' && key<='f') key-=32;
- if (!ro && ((key>='0' && key<='9') || (key>='A' && key<='F'))) {
+ if (!FLAG(r) && ((key>='0' && key<='9') || (key>='A' && key<='F'))) {
if (!side) {
long long *ll = (long long *)toybuf;
- ll[TT.undo] = pos;
- toybuf[(sizeof(long long)*UNDO_LEN)+TT.undo++] = TT.data[pos];
+ ll[TT.undo] = TT.pos;
+ toybuf[(sizeof(long long)*UNDO_LEN)+TT.undo++] = TT.data[TT.pos];
if (TT.undolen < UNDO_LEN) TT.undolen++;
TT.undo %= UNDO_LEN;
}
i = key - '0';
if (i>9) i -= 7;
- TT.data[pos] &= 15<<(4*side);
- TT.data[pos] |= i<<(4*!side);
+ TT.data[TT.pos] &= 15<<(4*side);
+ TT.data[TT.pos] |= i<<(4*!side);
if (++side==2) {
highlight(x, y, side);
side = 0;
- ++pos;
+ ++TT.pos;
}
} else side = 0;
if (key=='u') {
@@ -218,26 +330,35 @@ void hexedit_main(void)
TT.undolen--;
if (!TT.undo) TT.undo = UNDO_LEN;
- pos = ll[--TT.undo];
- TT.data[pos] = toybuf[sizeof(long long)*UNDO_LEN+TT.undo];
+ TT.pos = ll[--TT.undo];
+ TT.data[TT.pos] = toybuf[sizeof(long long)*UNDO_LEN+TT.undo];
}
}
if (key>=256) {
key -= 256;
- if (key==KEY_UP) pos -= 16;
- else if (key==KEY_DOWN) pos += 16;
+ if (key==KEY_UP) TT.pos -= 16;
+ else if (key==KEY_DOWN) TT.pos += 16;
else if (key==KEY_RIGHT) {
- if (x<15) pos++;
+ if (TT.pos<TT.len) TT.pos++;
} else if (key==KEY_LEFT) {
- if (x) pos--;
- } else if (key==KEY_PGUP) pos -= 16*TT.height;
- else if (key==KEY_PGDN) pos += 16*TT.height;
- else if (key==KEY_HOME) pos = 0;
- else if (key==KEY_END) pos = TT.len-1;
+ if (TT.pos>0) TT.pos--;
+ } else if (key==KEY_PGUP) {
+ TT.pos -= 16*TT.rows;
+ if (TT.pos < 0) TT.pos = 0;
+ TT.base = TT.pos/16;
+ draw_page();
+ } else if (key==KEY_PGDN) {
+ TT.pos += 16*TT.rows;
+ if (TT.pos > TT.len-1) TT.pos = TT.len-1;
+ TT.base = TT.pos/16;
+ draw_page();
+ } else if (key==KEY_HOME) TT.pos = TT.pos & ~0xf;
+ else if (key==KEY_END) TT.pos = TT.pos | 0xf;
+ else if (key==(KEY_CTRL|KEY_HOME)) TT.pos = 0;
+ else if (key==(KEY_CTRL|KEY_END)) TT.pos = TT.len-1;
}
}
munmap(TT.data, TT.len);
- close(fd);
tty_reset();
}
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