diff options
Diffstat (limited to 'editors')
| -rw-r--r-- | editors/Config.in | 10 | ||||
| -rw-r--r-- | editors/vi.c | 50 |
2 files changed, 36 insertions, 24 deletions
diff --git a/editors/Config.in b/editors/Config.in index fd840ae..936004c 100644 --- a/editors/Config.in +++ b/editors/Config.in @@ -50,6 +50,16 @@ config VI learning curve. If you are not already comfortable with 'vi' you may wish to use something else. +config FEATURE_VI_MAX_LEN + int "Maximum line length in vi" + range 256 16384 + default 1024 + depends on VI + help + vi uses on-stack buffers for intermediate line buffers. + You may want to decrease this parameter if your target machine + benefits from smaller stack usage. + config FEATURE_VI_COLON bool "Enable \":\" colon commands (no \"ex\" mode)" default y diff --git a/editors/vi.c b/editors/vi.c index cd64aac..b961ca5 100644 --- a/editors/vi.c +++ b/editors/vi.c @@ -32,7 +32,10 @@ #define Isprint(c) ((unsigned char)(c) >= ' ' && (c) != 0x7f && (unsigned char)(c) != 0x9b) #endif -#define MAX_SCR_COLS BUFSIZ +enum { + MAX_LINELEN = CONFIG_FEATURE_VI_MAX_LEN, + MAX_SCR_COLS = CONFIG_FEATURE_VI_MAX_LEN, +}; // Misc. non-Ascii keys that report an escape sequence #define VI_K_UP (char)128 // cursor key Up @@ -545,7 +548,7 @@ static char *get_one_address(char * p, int *addr) // get colon addr, if present char c; #endif #if ENABLE_FEATURE_VI_SEARCH - char *pat, buf[BUFSIZ]; + char *pat, buf[MAX_LINELEN]; #endif *addr = -1; // assume no addr @@ -648,7 +651,7 @@ static void setops(const char *args, const char *opname, int flg_no, static void colon(char * buf) { char c, *orig_buf, *buf1, *q, *r; - char *fn, cmd[BUFSIZ], args[BUFSIZ]; + char *fn, cmd[MAX_LINELEN], args[MAX_LINELEN]; int i, l, li, ch, b, e; int useforce = FALSE, forced = FALSE; struct stat st_buf; @@ -679,8 +682,8 @@ static void colon(char * buf) r = end - 1; li = count_lines(text, end - 1); fn = cfn; // default to current file - memset(cmd, '\0', BUFSIZ); // clear cmd[] - memset(args, '\0', BUFSIZ); // clear args[] + memset(cmd, '\0', MAX_LINELEN); // clear cmd[] + memset(args, '\0', MAX_LINELEN); // clear args[] // look for optional address(es) :. :1 :1,9 :'q,'a :% buf = get_address(buf, &b, &e); @@ -763,10 +766,10 @@ static void colon(char * buf) } if (args[0]) { // the user supplied a file name - fn= args; + fn = args; } else if (cfn && cfn[0]) { // no user supplied name- use the current filename - fn= cfn; + fn = cfn; goto vc5; } else { // no user file name, no current name- punt @@ -1984,8 +1987,7 @@ static void start_new_cmd_q(char c) // release old cmd free(last_modifying_cmd); // get buffer for new cmd - last_modifying_cmd = xmalloc(BUFSIZ); - memset(last_modifying_cmd, '\0', BUFSIZ); // clear new cmd queue + last_modifying_cmd = xzalloc(MAX_LINELEN); // if there is a current cmd count put it in the buffer first if (cmdcnt > 0) sprintf(last_modifying_cmd, "%d%c", cmdcnt, c); @@ -2238,7 +2240,7 @@ static char readit(void) // read (maybe cursor) key from stdin if (n <= 0) { ri0: // the Q is empty, wait for a typed char - n = read(0, readbuffer, BUFSIZ - 1); + n = read(0, readbuffer, MAX_LINELEN - 1); if (n < 0) { if (errno == EINTR) goto ri0; // interrupted sys call @@ -2268,9 +2270,9 @@ static char readit(void) // read (maybe cursor) key from stdin tv.tv_usec = 50000; // Wait 5/100 seconds- 1 Sec=1000000 // keep reading while there are input chars and room in buffer - while (select(1, &rfds, NULL, NULL, &tv) > 0 && n <= (BUFSIZ - 5)) { + while (select(1, &rfds, NULL, NULL, &tv) > 0 && n <= (MAX_LINELEN - 5)) { // read the rest of the ESC string - int r = read(0, (void *) (readbuffer + n), BUFSIZ - n); + int r = read(0, (void *) (readbuffer + n), MAX_LINELEN - n); if (r > 0) { n += r; } @@ -2305,7 +2307,7 @@ static char readit(void) // read (maybe cursor) key from stdin } // remove key sequence from Q readed_for_parse -= n; - memmove(readbuffer, readbuffer + n, BUFSIZ - n); + memmove(readbuffer, readbuffer + n, MAX_LINELEN - n); alarm(3); // we are done waiting for input, turn alarm ON return c; } @@ -2340,7 +2342,7 @@ static char get_one_char(void) c = readit(); // get the users input if (last_modifying_cmd != 0) { int len = strlen(last_modifying_cmd); - if (len + 1 >= BUFSIZ) { + if (len >= MAX_LINELEN - 1) { psbs("last_modifying_cmd overrun"); } else { // add new char to q @@ -2358,7 +2360,7 @@ static char *get_input_line(const char * prompt) // get input line- use "status { static char *obufp; - char buf[BUFSIZ]; + char buf[MAX_LINELEN]; char c; int i; @@ -2369,7 +2371,7 @@ static char *get_input_line(const char * prompt) // get input line- use "status write1(prompt); // write out the :, /, or ? prompt i = strlen(buf); - while (i < BUFSIZ) { + while (i < MAX_LINELEN) { c = get_one_char(); // read user input if (c == '\n' || c == '\r' || c == 27) break; // is this end of input @@ -2514,16 +2516,16 @@ static int file_write(char * fn, char * first, char * last) //----- Move the cursor to row x col (count from 0, not 1) ------- static void place_cursor(int row, int col, int opti) { - char cm1[BUFSIZ]; + char cm1[MAX_LINELEN]; char *cm; #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR - char cm2[BUFSIZ]; + char cm2[MAX_LINELEN]; char *screenp; - // char cm3[BUFSIZ]; + // char cm3[MAX_LINELEN]; int Rrow = last_row; #endif - memset(cm1, '\0', BUFSIZ - 1); // clear the buffer + memset(cm1, '\0', MAX_LINELEN); // clear the buffer if (row < 0) row = 0; if (row >= rows) row = rows - 1; @@ -2539,7 +2541,7 @@ static void place_cursor(int row, int col, int opti) #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR //----- find the minimum # of chars to move cursor ------------- //----- 2. Try moving with discreet chars (Newline, [back]space, ...) - memset(cm2, '\0', BUFSIZ - 1); // clear the buffer + memset(cm2, '\0', MAX_LINELEN); // clear the buffer // move to the correct row while (row < Rrow) { @@ -2696,7 +2698,7 @@ static void psb(const char *format, ...) static void ni(const char * s) // display messages { - char buf[BUFSIZ]; + char buf[MAX_LINELEN]; print_literal(buf, s); psbs("\'%s\' is not implemented", buf); @@ -3900,7 +3902,7 @@ static void crash_dummy() cd0: startrbi = rbi = 0; sleeptime = 0; // how long to pause between commands - memset(readbuffer, '\0', BUFSIZ); // clear the read buffer + memset(readbuffer, '\0', MAX_LINELEN); // clear the read buffer // generate a command by percentages percent = (int) lrand48() % 100; // get a number from 0-99 if (percent < Mp) { // Movement commands @@ -3985,7 +3987,7 @@ static void crash_test() static time_t oldtim; time_t tim; - char d[2], msg[BUFSIZ]; + char d[2], msg[MAX_LINELEN]; msg[0] = '\0'; if (end < text) { |