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-rw-r--r--editors/vi.c125
1 files changed, 64 insertions, 61 deletions
diff --git a/editors/vi.c b/editors/vi.c
index 50dda7f3a..55154dcd7 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -57,29 +57,33 @@ enum {
MAX_SCR_ROWS = CONFIG_FEATURE_VI_MAX_LEN,
};
-// Misc. non-Ascii keys that report an escape sequence
-#define VI_K_UP (char)128 // cursor key Up
-#define VI_K_DOWN (char)129 // cursor key Down
-#define VI_K_RIGHT (char)130 // Cursor Key Right
-#define VI_K_LEFT (char)131 // cursor key Left
-#define VI_K_HOME (char)132 // Cursor Key Home
-#define VI_K_END (char)133 // Cursor Key End
-#define VI_K_INSERT (char)134 // Cursor Key Insert
-#define VI_K_DELETE (char)135 // Cursor Key Insert
-#define VI_K_PAGEUP (char)136 // Cursor Key Page Up
-#define VI_K_PAGEDOWN (char)137 // Cursor Key Page Down
-#define VI_K_FUN1 (char)138 // Function Key F1
-#define VI_K_FUN2 (char)139 // Function Key F2
-#define VI_K_FUN3 (char)140 // Function Key F3
-#define VI_K_FUN4 (char)141 // Function Key F4
-#define VI_K_FUN5 (char)142 // Function Key F5
-#define VI_K_FUN6 (char)143 // Function Key F6
-#define VI_K_FUN7 (char)144 // Function Key F7
-#define VI_K_FUN8 (char)145 // Function Key F8
-#define VI_K_FUN9 (char)146 // Function Key F9
-#define VI_K_FUN10 (char)147 // Function Key F10
-#define VI_K_FUN11 (char)148 // Function Key F11
-#define VI_K_FUN12 (char)149 // Function Key F12
+// "Keycodes" that report an escape sequence.
+// We use something which fits into signed char,
+// yet doesn't represent any valid Unicode characher.
+enum {
+ VI_K_UP = -1, // cursor key Up
+ VI_K_DOWN = -2, // cursor key Down
+ VI_K_RIGHT = -3, // Cursor Key Right
+ VI_K_LEFT = -4, // cursor key Left
+ VI_K_HOME = -5, // Cursor Key Home
+ VI_K_END = -6, // Cursor Key End
+ VI_K_INSERT = -7, // Cursor Key Insert
+ VI_K_DELETE = -8, // Cursor Key Insert
+ VI_K_PAGEUP = -9, // Cursor Key Page Up
+ VI_K_PAGEDOWN = -10, // Cursor Key Page Down
+ VI_K_FUN1 = -11, // Function Key F1
+ VI_K_FUN2 = -12, // Function Key F2
+ VI_K_FUN3 = -13, // Function Key F3
+ VI_K_FUN4 = -14, // Function Key F4
+ VI_K_FUN5 = -15, // Function Key F5
+ VI_K_FUN6 = -16, // Function Key F6
+ VI_K_FUN7 = -17, // Function Key F7
+ VI_K_FUN8 = -18, // Function Key F8
+ VI_K_FUN9 = -19, // Function Key F9
+ VI_K_FUN10 = -20, // Function Key F10
+ VI_K_FUN11 = -21, // Function Key F11
+ VI_K_FUN12 = -22, // Function Key F12
+};
/* vt102 typical ESC sequence */
/* terminal standout start/normal ESC sequence */
@@ -171,9 +175,9 @@ struct globals {
char *screen; // pointer to the virtual screen buffer
int screensize; // and its size
int tabstop;
+ int last_forward_char; // last char searched for with 'f' (int because of Unicode)
char erase_char; // the users erase character
char last_input_char; // last char read from user
- char last_forward_char; // last char searched for with 'f'
#if ENABLE_FEATURE_VI_DOT_CMD
smallint adding2q; // are we currently adding user input to q
@@ -298,7 +302,7 @@ struct globals {
static int init_text_buffer(char *); // init from file or create new
static void edit_file(char *); // edit one file
-static void do_cmd(char); // execute a command
+static void do_cmd(int); // execute a command
static int next_tabstop(int);
static void sync_cursor(char *, int *, int *); // synchronize the screen cursor to dot
static char *begin_line(char *); // return pointer to cur line B-o-l
@@ -334,8 +338,8 @@ static void rawmode(void); // set "raw" mode on tty
static void cookmode(void); // return to "cooked" mode on tty
// sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready)
static int mysleep(int);
-static char readit(void); // read (maybe cursor) key from stdin
-static char get_one_char(void); // read 1 char from stdin
+static int readit(void); // read (maybe cursor) key from stdin
+static int get_one_char(void); // read 1 char from stdin
static int file_size(const char *); // what is the byte size of "fn"
#if ENABLE_FEATURE_VI_READONLY
static int file_insert(const char *, char *, int);
@@ -524,7 +528,7 @@ static void edit_file(char *fn)
#if ENABLE_FEATURE_VI_YANKMARK
#define cur_line edit_file__cur_line
#endif
- char c;
+ int c;
int size;
#if ENABLE_FEATURE_VI_USE_SIGNALS
int sig;
@@ -622,8 +626,10 @@ static void edit_file(char *fn)
// These are commands that change text[].
// Remember the input for the "." command
if (!adding2q && ioq_start == NULL
- && cmd_mode == 0 /* command mode */
- && c != '\0' && strchr(modifying_cmds, c)
+ && cmd_mode == 0 // command mode
+ && c > '\0' // exclude NUL and non-ASCII chars
+ && c < 0x7f // (Unicode and such)
+ && strchr(modifying_cmds, c)
) {
start_new_cmd_q(c);
}
@@ -1198,7 +1204,7 @@ static void colon(char *buf)
static void Hit_Return(void)
{
- char c;
+ int c;
standout_start();
write1("[Hit return to continue]");
@@ -2191,15 +2197,15 @@ static int mysleep(int hund) // sleep for 'h' 1/100 seconds
}
//----- IO Routines --------------------------------------------
-static char readit(void) // read (maybe cursor) key from stdin
+static int readit(void) // read (maybe cursor) key from stdin
{
- char c;
+ int c;
int n;
// Known escape sequences for cursor and function keys.
static const struct esc_cmds {
const char seq[4];
- char val; //TODO: int? Need to make it at least 8-bit clean!
+ signed char val;
} esccmds[] = {
{"OA" , VI_K_UP }, // Cursor Key Up
{"OB" , VI_K_DOWN }, // Cursor Key Down
@@ -2256,7 +2262,7 @@ static char readit(void) // read (maybe cursor) key from stdin
}
// Grab character to return from buffer
- c = readbuffer[0];
+ c = (unsigned char)readbuffer[0];
// Returning NUL from this routine would be bad.
if (c == '\0')
c = ' ';
@@ -2302,7 +2308,7 @@ static char readit(void) // read (maybe cursor) key from stdin
break; // try next seq
i++;
if (i == 4 || !eindex->seq[i]) { // entire seq matched
- c = eindex->val;
+ c = eindex->val; // sign extended!
n = 0;
// n -= i; memmove(...);
// would be more correct,
@@ -2322,9 +2328,9 @@ static char readit(void) // read (maybe cursor) key from stdin
}
//----- IO Routines --------------------------------------------
-static char get_one_char(void)
+static int get_one_char(void)
{
- char c;
+ int c;
#if ENABLE_FEATURE_VI_DOT_CMD
if (!adding2q) {
@@ -2335,7 +2341,8 @@ static char get_one_char(void)
c = readit(); // get the users input
} else {
// there is a queue to get chars from first
- c = *ioq++;
+ // careful with correct sign expansion!
+ c = (unsigned char)*ioq++;
if (c == '\0') {
// the end of the q, read from STDIN
free(ioq_start);
@@ -2365,7 +2372,7 @@ static char *get_input_line(const char *prompt)
// char [MAX_INPUT_LEN]
#define buf get_input_line__buf
- char c;
+ int c;
int i;
strcpy(buf, prompt);
@@ -2384,7 +2391,8 @@ static char *get_input_line(const char *prompt)
write1("\b \b"); // erase char on screen
if (i <= 0) // user backs up before b-o-l, exit
break;
- } else {
+ } else if (c > 0 && c < 256) { // exclude Unicode
+ // (TODO: need to handle Unicode)
buf[i] = c;
buf[++i] = '\0';
bb_putchar(c);
@@ -2987,13 +2995,14 @@ static void refresh(int full_screen)
//---------------------------------------------------------------------
//----- Execute a Vi Command -----------------------------------
-static void do_cmd(char c)
+static void do_cmd(int c)
{
const char *msg = msg; // for compiler
- char c1, *p, *q, *save_dot;
+ char *p, *q, *save_dot;
char buf[12];
int dir = dir; // for compiler
int cnt, i, j;
+ int c1;
// c1 = c; // quiet the compiler
// cnt = yf = 0; // quiet the compiler
@@ -3173,21 +3182,18 @@ static void do_cmd(char c)
break;
#if ENABLE_FEATURE_VI_YANKMARK
case '"': // "- name a register to use for Delete/Yank
- c1 = get_one_char();
- c1 = tolower(c1);
- if (islower(c1)) {
- YDreg = c1 - 'a';
+ c1 = (get_one_char() | 0x20) - 'a'; // | 0x20 is tolower()
+ if ((unsigned)c1 <= 25) { // a-z?
+ YDreg = c1;
} else {
indicate_error(c);
}
break;
case '\'': // '- goto a specific mark
- c1 = get_one_char();
- c1 = tolower(c1);
- if (islower(c1)) {
- c1 = c1 - 'a';
+ c1 = (get_one_char() | 0x20) - 'a';
+ if ((unsigned)c1 <= 25) { // a-z?
// get the b-o-l
- q = mark[(unsigned char) c1];
+ q = mark[c1];
if (text <= q && q < end) {
dot = q;
dot_begin(); // go to B-o-l
@@ -3206,12 +3212,10 @@ static void do_cmd(char c)
// between text[0] and dot then this mark will not point to the
// correct location! It could be off by many lines!
// Well..., at least its quick and dirty.
- c1 = get_one_char();
- c1 = tolower(c1);
- if (islower(c1)) {
- c1 = c1 - 'a';
+ c1 = (get_one_char() | 0x20) - 'a';
+ if ((unsigned)c1 <= 25) { // a-z?
// remember the line
- mark[(int) c1] = dot;
+ mark[c1] = dot;
} else {
indicate_error(c);
}
@@ -3546,12 +3550,11 @@ static void do_cmd(char c)
end_cmd_q(); // stop adding to q
#endif
break;
- case 'g': // 'gg' goto a line number (from vim)
- // (default to first line in file)
+ case 'g': // 'gg' goto a line number (vim) (default: very first line)
c1 = get_one_char();
if (c1 != 'g') {
buf[0] = 'g';
- buf[1] = c1;
+ buf[1] = c1; // TODO: if Unicode?
buf[2] = '\0';
not_implemented(buf);
break;
@@ -3804,7 +3807,7 @@ static void do_cmd(char c)
do_cmd(';');
if (*dot == last_forward_char)
dot_left();
- last_forward_char= 0;
+ last_forward_char = 0;
break;
case 'w': // w- forward a word
if (cmdcnt-- > 1) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 23:53:19 +0000