| #include <R_ext/Boolean.h> |
| #include <R_ext/Error.h> |
| |
| /* |
| * Copyright (C) 1991, 1992, 1993 by Chris Thewalt (thewalt@ce.berkeley.edu) |
| * |
| * Permission to use, copy, modify, and distribute this software |
| * for any purpose and without fee is hereby granted, provided |
| * that the above copyright notices appear in all copies and that both the |
| * copyright notice and this permission notice appear in supporting |
| * documentation. This software is provided "as is" without express or |
| * implied warranty. |
| * |
| * Thanks to the following people who have provided enhancements and fixes: |
| * Ron Ueberschaer, Christoph Keller, Scott Schwartz, Steven List, |
| * DaviD W. Sanderson, Goran Bostrom, Michael Gleason, Glenn Kasten, |
| * Edin Hodzic, Eric J Bivona, Kai Uwe Rommel, Danny Quah, Ulrich Betzler |
| */ |
| |
| #include "getline.h" |
| |
| static int gl_tab(); /* forward reference needed for gl_tab_hook */ |
| int (*gl_in_hook)() = 0; |
| int (*gl_out_hook)() = 0; |
| int (*gl_tab_hook)() = gl_tab; |
| |
| #include <rlocale.h> |
| extern Rboolean mbcslocale; |
| #define mbs_init(x) memset(x, 0, sizeof(mbstate_t)) |
| |
| /* NB: this define must match the one in src/main/scan.c */ |
| #define CONSOLE_PROMPT_SIZE 256 |
| |
| #include <string.h> |
| #include <ctype.h> |
| #include <setjmp.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <io.h> |
| |
| /******************** internal interface *********************************/ |
| |
| |
| static int BUF_SIZE; /* dimension of the buffer received*/ |
| static int gl_init_done = -1; /* terminal mode flag */ |
| static int gl_termw = 80; /* actual terminal width */ |
| static int gl_scroll = 27; /* width of EOL scrolling region */ |
| static int gl_width = 0; /* net size available for input */ |
| static int gl_extent = 0; /* how far to redraw, 0 means all */ |
| static int gl_overwrite = 0; /* overwrite mode */ |
| static int gl_pos, gl_cnt = 0; /* position and size of input */ |
| static char *gl_buf; /* input buffer */ |
| static char *gl_killbuf; /* killed text */ |
| static const char *gl_prompt; /* to save the prompt string */ |
| static int gl_search_mode = 0; /* search mode flag */ |
| |
| static jmp_buf gl_jmp; |
| |
| static void gl_init(void); /* prepare to edit a line */ |
| static void gl_cleanup(void); /* to undo gl_init */ |
| static void gl_char_init(void); /* get ready for no echo input */ |
| static void gl_char_cleanup(void); /* undo gl_char_init */ |
| static size_t (*gl_strlen)() = (size_t(*)())strlen; |
| /* returns printable prompt width */ |
| |
| static void gl_addchar(int); /* install specified char */ |
| static void gl_del(int); /* del, either left (-1) or cur (0) */ |
| static void gl_error(const char *); /* write error msg and die */ |
| static void gl_fixup(const char *, int, int); /* fixup state variables and screen */ |
| static int gl_getc(void); /* read one char from terminal */ |
| static void gl_kill(int); /* delete to EOL */ |
| static void gl_newline(void); /* handle \n or \r */ |
| static void gl_putc(int); /* write one char to terminal */ |
| static void gl_puts(const char *); /* write a line to terminal */ |
| static void gl_redraw(void); /* issue \n and redraw all */ |
| static void gl_transpose(void); /* transpose two chars */ |
| static void gl_yank(void); /* yank killed text */ |
| static void gl_word(int); /* move a word */ |
| static void gl_killword(int); |
| |
| void gl_hist_init(int, int); /* initializes hist pointers */ |
| char *gl_hist_next(); /* return ptr to next item */ |
| char *gl_hist_prev(); /* return ptr to prev item */ |
| static char *hist_save(); /* makes copy of a string, without NL */ |
| |
| static void search_addchar(int); /* increment search string */ |
| static void search_term(void); /* reset with current contents */ |
| static void search_back(int); /* look back for current string */ |
| static void search_forw(int); /* look forw for current string */ |
| static void gl_beep(void); /* try to play a system beep sound */ |
| |
| /************************ nonportable part *********************************/ |
| |
| /*extern int write(); |
| extern void exit();*/ |
| |
| #define WIN32_LEAN_AND_MEAN 1 |
| #include <windows.h> |
| static HANDLE Win32OutputStream, Win32InputStream = NULL; |
| static DWORD OldWin32Mode, AltIsDown; |
| |
| static void |
| gl_char_init() /* turn off input echo */ |
| { |
| if (!Win32InputStream) { |
| Win32InputStream = GetStdHandle(STD_INPUT_HANDLE); |
| Win32OutputStream = GetStdHandle(STD_OUTPUT_HANDLE); |
| } |
| GetConsoleMode(Win32InputStream,&OldWin32Mode); |
| SetConsoleMode(Win32InputStream, ENABLE_PROCESSED_INPUT); /* So ^C works */ |
| AltIsDown = 0; |
| } |
| |
| static void |
| gl_char_cleanup(void) /* undo effects of gl_char_init */ |
| { |
| SetConsoleMode(Win32InputStream,OldWin32Mode); |
| AltIsDown = 0; |
| } |
| |
| static int |
| gl_getc(void) |
| /* get a character without echoing it to screen */ |
| { |
| int c; |
| static char buf[9] = ""; |
| static int bufavail = 0; |
| static int bufpos = 0; |
| |
| if (bufavail > 0) { |
| bufavail--; |
| return buf[bufpos++]; |
| } |
| bufpos = 0; |
| |
| /* guido masarotto (3/12/98) |
| * get Ansi char code from a Win32 console |
| */ |
| DWORD a; |
| INPUT_RECORD r; |
| DWORD st; |
| WORD vk; |
| CONSOLE_SCREEN_BUFFER_INFO csb; |
| int bbb = 0, nAlt=0, n; |
| |
| c = 0; |
| while (!c) { |
| /* |
| Following two lines seem to be needed under Win2k |
| to reshow the cursor |
| */ |
| GetConsoleScreenBufferInfo(Win32OutputStream, &csb); |
| SetConsoleCursorPosition(Win32OutputStream, csb.dwCursorPosition); |
| ReadConsoleInputW(Win32InputStream, &r, 1, &a); |
| if (!(r.EventType == KEY_EVENT)) break; |
| st = r.Event.KeyEvent.dwControlKeyState; |
| vk = r.Event.KeyEvent.wVirtualKeyCode; |
| if (r.Event.KeyEvent.bKeyDown) { |
| AltIsDown = (st & LEFT_ALT_PRESSED); |
| if (vk == VK_MENU && AltIsDown) { /* VK_MENU is |
| Alt or AltGr */ |
| nAlt = 0; |
| bbb = 0; |
| } |
| else if (st & ENHANCED_KEY) { |
| switch(vk) { |
| case VK_LEFT: c=2 ;break; |
| case VK_RIGHT: c=6;break; |
| case VK_HOME: c='\001';break; |
| case VK_END: c='\005';break; |
| case VK_UP: c=16;break; |
| case VK_DOWN: c=14;break; |
| case VK_DELETE: c='\004';break; |
| } |
| } |
| else if (AltIsDown) { /* Interpret Alt+xxx entries */ |
| switch (vk) { |
| case VK_INSERT: n = 0; break; |
| case VK_END: n = 1; break; |
| case VK_DOWN: n = 2; break; |
| case VK_NEXT: n = 3;break; |
| case VK_LEFT: n = 4; break; |
| case VK_CLEAR: n = 5; break; |
| case VK_RIGHT: n = 6; break; |
| case VK_HOME: n = 7; break; |
| case VK_UP: n = 8; break; |
| case VK_PRIOR: n = 9; break; |
| default: n = -1; |
| } |
| if (n >= 0) bbb = 10 * bbb + n; |
| nAlt += 1; |
| if (nAlt==3) { |
| c = (bbb < 256) && (bbb > 0) ? bbb : 0; |
| bbb = 0; |
| nAlt = 0; |
| } |
| } |
| else { |
| /* Originally uChar.AsciiChar was used here and for MBCS characters |
| GetConsoleInput returned as many events as bytes in the character. |
| As of Windows 8 this reportedly no longer works, GetConsoleInput |
| would only generate one event with the first byte in AsciiChar. |
| The bug still exists in Windows 10, and thus we now call |
| GetConsoleInputW to get uchar.UnicodeChar. Ideally (at least for |
| Windows) all of getline code would be refactored to work with wide |
| characters, but for now we just convert the character back to bytes |
| in current native locale to recover the old behavior of gl_getc. */ |
| wchar_t wc = r.Event.KeyEvent.uChar.UnicodeChar; |
| mbstate_t mb_st; |
| mbs_init(&mb_st); |
| if (wc != L'\0') { |
| size_t cres = wcrtomb(buf, wc, &mb_st); |
| if (cres != (size_t)-1) { |
| bufavail = (int) cres - 1; |
| bufpos = 1; |
| c = buf[0]; |
| } |
| } |
| } |
| } |
| else if (vk == VK_MENU && AltIsDown) { |
| /* Alt key up event: could be AltGr, but let's hope users |
| only press one of them at a time. */ |
| AltIsDown = 0; |
| c = (bbb < 256) && (bbb > 0) ? bbb : 0; |
| bbb = 0; |
| nAlt = 0; |
| } |
| if ((c < -127) || (c > 255)) c = 0; |
| if (c < 0) c = 256 + c; |
| } |
| return c; |
| } |
| |
| static void |
| gl_putc(int c) |
| { |
| int ch = c; |
| |
| write(1, &ch, 1); |
| if (ch == '\n') { |
| ch = '\r'; |
| write(1, &ch, 1); /* RAW mode needs '\r', does not hurt */ |
| } |
| } |
| |
| /******************** fairly portable part *********************************/ |
| |
| static void |
| gl_puts(const char *const buf) |
| { |
| int len; |
| |
| if (buf) { |
| len = strlen(buf); |
| write(1, buf, len); |
| } |
| } |
| |
| void gl_error(const char *const buf) |
| { |
| int len = strlen(buf); |
| |
| gl_cleanup(); |
| write(2, buf, len); |
| longjmp(gl_jmp,1); |
| } |
| |
| static void |
| gl_init(void) |
| /* set up variables and terminal */ |
| { |
| if (gl_init_done < 0) { /* -1 only on startup */ |
| gl_hist_init(512, 1); |
| } |
| if (isatty(0) == 0 || isatty(1) == 0) |
| gl_error("\n*** Error: getline(): not interactive, use stdio.\n"); |
| if (!(gl_killbuf=calloc(BUF_SIZE,sizeof(char)))) |
| gl_error("\n*** Error: getline(): no enough memory.\n"); |
| gl_char_init(); |
| gl_init_done = 1; |
| } |
| |
| static void |
| gl_cleanup(void) |
| /* undo effects of gl_init, as necessary */ |
| { |
| if (gl_init_done > 0) |
| gl_char_cleanup(); |
| free(gl_killbuf); |
| gl_init_done = 0; |
| } |
| |
| void |
| gl_setwidth(int w) |
| { |
| if (w > 20) { |
| gl_termw = w; |
| gl_scroll = w / 3; |
| } else { |
| gl_error("\n*** Error: minimum screen width is 21\n"); |
| } |
| } |
| |
| int |
| getline(const char *prompt, char *buf, int buflen) |
| { |
| int c, loc, tmp; |
| int mb_len; |
| mbstate_t mb_st; |
| int i; |
| wchar_t wc; |
| |
| BUF_SIZE = buflen; |
| gl_buf = buf; |
| gl_buf[0] = '\0'; |
| if (setjmp(gl_jmp)) { |
| gl_newline(); |
| gl_cleanup(); |
| return 0; |
| } |
| gl_init(); |
| gl_pos = 0; |
| gl_prompt = (prompt)? prompt : ""; |
| if (gl_in_hook) |
| gl_in_hook(gl_buf); |
| gl_fixup(gl_prompt, -2, BUF_SIZE); |
| while ((c = gl_getc()) >= 0) { |
| gl_extent = 0; /* reset to full extent */ |
| if (!iscntrl(c)) { |
| if (gl_search_mode) |
| search_addchar(c); |
| else |
| gl_addchar(c); |
| } else { |
| if (gl_search_mode) { |
| if (c == '\033' || c == '\016' || c == '\020') { |
| search_term(); |
| c = 0; /* ignore the character */ |
| } else if (c == '\010' || c == '\177') { |
| search_addchar(-1); /* unwind search string */ |
| c = 0; |
| } else if (c != '\022' && c != '\023') { |
| search_term(); /* terminate and handle char */ |
| } |
| } |
| switch (c) { |
| case '\n': case '\r': /* newline */ |
| gl_newline(); |
| gl_cleanup(); |
| return 0; |
| /*NOTREACHED*/ |
| break; |
| case '\001': gl_fixup(gl_prompt, -1, 0); /* ^A */ |
| break; |
| case '\002': /* ^B */ |
| if(mbcslocale) { |
| mb_len = 0; |
| mbs_init(&mb_st); |
| for(i = 0; i < gl_pos ;) { |
| mbrtowc(&wc, gl_buf+i, MB_CUR_MAX, &mb_st); |
| mb_len = Ri18n_wcwidth(wc); |
| i += (wc==0) ? 0 : mb_len; |
| } |
| gl_fixup(gl_prompt, -1, gl_pos - mb_len); |
| } else |
| gl_fixup(gl_prompt, -1, gl_pos-1); |
| break; |
| case '\003': /* ^C */ |
| gl_fixup(gl_prompt, -1, gl_cnt); |
| gl_puts("^C\n"); |
| gl_kill(0); |
| gl_fixup(gl_prompt, -2, BUF_SIZE); |
| break; |
| case '\004': /* ^D */ |
| if (gl_cnt == 0) { |
| gl_buf[0] = 0; |
| gl_cleanup(); |
| gl_putc('\n'); |
| return 0; |
| } else { |
| gl_del(0); |
| } |
| break; |
| case '\005': gl_fixup(gl_prompt, -1, gl_cnt); /* ^E */ |
| break; |
| case '\006': /* ^F */ |
| if(mbcslocale) { |
| if(gl_pos >= gl_cnt) break; |
| mb_len = 0; |
| mbs_init(&mb_st); |
| for(i = 0; i<= gl_pos ;){ |
| mbrtowc(&wc, gl_buf+i, MB_CUR_MAX, &mb_st); |
| mb_len = Ri18n_wcwidth(wc); |
| i += (wc==0) ? 0 : mb_len; |
| } |
| gl_fixup(gl_prompt, -1, gl_pos + mb_len); |
| } |
| else |
| gl_fixup(gl_prompt, -1, gl_pos+1); |
| break; |
| case '\010': case '\177': gl_del(-1); /* ^H and DEL */ |
| break; |
| case '\t': /* TAB */ |
| if (gl_tab_hook) { |
| tmp = gl_pos; |
| loc = gl_tab_hook(gl_buf, gl_strlen(gl_prompt), &tmp); |
| if (loc != -1 || tmp != gl_pos) |
| gl_fixup(gl_prompt, loc, tmp); |
| } |
| break; |
| case '\013': gl_kill(gl_pos); /* ^K */ |
| break; |
| case '\014': gl_redraw(); /* ^L */ |
| break; |
| case '\016': /* ^N */ |
| strncpy(gl_buf, gl_hist_next(), BUF_SIZE-2); |
| gl_buf[BUF_SIZE-2] = '\0'; |
| if (gl_in_hook) |
| gl_in_hook(gl_buf); |
| gl_fixup(gl_prompt, 0, BUF_SIZE); |
| break; |
| case '\017': gl_overwrite = !gl_overwrite; /* ^O */ |
| break; |
| case '\020': /* ^P */ |
| strncpy(gl_buf, gl_hist_prev(),BUF_SIZE-2); |
| gl_buf[BUF_SIZE-2] = '\0'; |
| if (gl_in_hook) |
| gl_in_hook(gl_buf); |
| gl_fixup(gl_prompt, 0, BUF_SIZE); |
| break; |
| case '\022': search_back(1); /* ^R */ |
| break; |
| case '\023': search_forw(1); /* ^S */ |
| break; |
| case '\024': gl_transpose(); /* ^T */ |
| break; |
| case '\025': gl_kill(0); /* ^U */ |
| break; |
| case '\027': gl_killword(-1); /* ^W */ |
| break; |
| case '\031': gl_yank(); /* ^Y */ |
| break; |
| case '\032': /* ^Z */ |
| gl_newline(); |
| gl_cleanup(); |
| return 1; |
| /*NOTREACHED*/ |
| break; |
| case '\033': /* ansi arrow keys */ |
| c = gl_getc(); |
| if (c == '[') { |
| switch(c = gl_getc()) { |
| case 'A': /* up */ |
| strncpy(gl_buf, gl_hist_prev(), BUF_SIZE-2); |
| gl_buf[BUF_SIZE-2] = '\0'; |
| if (gl_in_hook) |
| gl_in_hook(gl_buf); |
| gl_fixup(gl_prompt, 0, BUF_SIZE); |
| break; |
| case 'B': /* down */ |
| strncpy(gl_buf, gl_hist_next(), BUF_SIZE-2); |
| gl_buf[BUF_SIZE-2] = '\0'; |
| if (gl_in_hook) |
| gl_in_hook(gl_buf); |
| gl_fixup(gl_prompt, 0, BUF_SIZE); |
| break; |
| case 'C': /* right */ |
| if(mbcslocale) { |
| mb_len = 0; |
| mbs_init(&mb_st); |
| for(i = 0; i <= gl_pos ;) { |
| mbrtowc(&wc, gl_buf+i, MB_CUR_MAX, &mb_st); |
| mb_len = Ri18n_wcwidth(wc); |
| i += (wc==0) ? 0 : mb_len; |
| } |
| gl_fixup(gl_prompt, -1, gl_pos + mb_len); |
| } else |
| gl_fixup(gl_prompt, -1, gl_pos+1); |
| break; |
| case 'D': /* left */ |
| if(mbcslocale) { |
| mb_len = 0; |
| mbs_init(&mb_st); |
| for(i = 0; i <= gl_pos ;) { |
| mbrtowc(&wc, gl_buf+i, MB_CUR_MAX, &mb_st); |
| mb_len = Ri18n_wcwidth(wc); |
| i += (wc==0) ? 0 :mb_len; |
| } |
| gl_fixup(gl_prompt, -1, gl_pos - mb_len); |
| } else |
| gl_fixup(gl_prompt, -1, gl_pos-1); |
| break; |
| default: gl_putc('\007'); /* who knows */ |
| break; |
| } |
| } else if (c == 'f' || c == 'F') { |
| gl_word(1); |
| } else if (c == 'b' || c == 'B') { |
| gl_word(-1); |
| } else |
| gl_putc('\007'); |
| break; |
| default: /* check for a terminal signal */ |
| if (c > 0) |
| gl_putc('\007'); |
| break; |
| } |
| } |
| } |
| gl_newline(); |
| gl_cleanup(); |
| return 0; |
| } |
| |
| static void |
| gl_addchar(int c) |
| |
| /* adds the character c to the input buffer at current location */ |
| { |
| int i; |
| |
| if (gl_cnt >= BUF_SIZE - 2) { |
| gl_putc('\a'); |
| return; |
| } |
| if(mbcslocale) { |
| mbstate_t mb_st; |
| wchar_t wc; |
| char s[9]; /* only 3 needed */ |
| int res; |
| int clen ; |
| |
| s[0] = c; |
| clen = 1; |
| res = 0; |
| /* This is a DBCS locale, so input is 1 or 2 bytes. |
| This loop should not be necessary. |
| */ |
| if((unsigned int) c >= (unsigned int) 0x80) { |
| while(clen <= MB_CUR_MAX) { |
| mbs_init(&mb_st); |
| res = mbrtowc(&wc, s, clen, &mb_st); |
| if(res >= 0) break; |
| if(res == -1) |
| gl_error("invalid multibyte character in mbcs_get_next"); |
| /* so res == -2 */ |
| c = gl_getc(); |
| if(c == EOF) |
| gl_error("EOF whilst reading MBCS char"); |
| s[clen++] = c; |
| } /* we've tried enough, so must be complete or invalid by now */ |
| } |
| if( res >= 0 ) { |
| if (!(gl_overwrite == 0 || gl_pos == gl_cnt)) |
| gl_del(0); |
| for (i = gl_cnt; i >= gl_pos; i--) |
| gl_buf[i+clen] = gl_buf[i]; |
| for (i = 0; i < clen; i++) |
| gl_buf[gl_pos + i] = s[i]; |
| gl_fixup(gl_prompt, gl_pos, gl_pos+clen); |
| } |
| |
| } else |
| if (gl_overwrite == 0 || gl_pos == gl_cnt) { |
| for (i = gl_cnt; i >= gl_pos; i--) |
| gl_buf[i+1] = gl_buf[i]; |
| gl_buf[gl_pos] = (char) c; |
| gl_fixup(gl_prompt, gl_pos, gl_pos+1); |
| } else { |
| gl_buf[gl_pos] = (char) c; |
| gl_extent = 1; |
| gl_fixup(gl_prompt, gl_pos, gl_pos+1); |
| } |
| } |
| |
| static void |
| gl_yank(void) |
| /* adds the kill buffer to the input buffer at current location */ |
| { |
| int i, len; |
| |
| len = strlen(gl_killbuf); |
| if (len > 0) { |
| if (gl_overwrite == 0) { |
| if (gl_cnt + len >= BUF_SIZE - 1) |
| gl_error("\n*** Error: getline(): input buffer overflow\n"); |
| for (i=gl_cnt; i >= gl_pos; i--) |
| gl_buf[i+len] = gl_buf[i]; |
| for (i=0; i < len; i++) |
| gl_buf[gl_pos+i] = gl_killbuf[i]; |
| gl_fixup(gl_prompt, gl_pos, gl_pos+len); |
| } else { |
| if (gl_pos + len > gl_cnt) { |
| if (gl_pos + len >= BUF_SIZE - 1) |
| gl_error("\n*** Error: getline(): input buffer overflow\n"); |
| gl_buf[gl_pos + len] = 0; |
| } |
| for (i=0; i < len; i++) |
| gl_buf[gl_pos+i] = gl_killbuf[i]; |
| gl_extent = len; |
| gl_fixup(gl_prompt, gl_pos, gl_pos+len); |
| } |
| } else |
| gl_beep(); |
| } |
| |
| static void |
| gl_transpose(void) |
| /* switch character under cursor and to left of cursor */ |
| { |
| int c; |
| |
| if (gl_pos > 0 && gl_cnt > gl_pos) { |
| if(mbcslocale) { |
| int l_len = 0; |
| int r_len = 0; |
| int i = 0; |
| int j = 0; |
| mbstate_t mb_st; |
| |
| mbs_init(&mb_st); |
| for (i = 0; i < gl_pos;) { |
| l_len = mbrlen(gl_buf+i, MB_CUR_MAX, &mb_st); |
| i += l_len; |
| } |
| mbs_init(&mb_st); |
| r_len = mbrlen(gl_buf+gl_pos, MB_CUR_MAX, &mb_st); |
| for (i = 0; i < r_len; i++) { |
| for(j = 0; j < l_len; j++) { |
| c = gl_buf[gl_pos+i-j]; |
| gl_buf[gl_pos+i-j] = gl_buf[gl_pos+i-j-1]; |
| gl_buf[gl_pos+i-j-1] = (char)c; |
| } |
| } |
| gl_extent = l_len + r_len; |
| gl_fixup(gl_prompt, gl_pos - l_len, gl_pos + (r_len - l_len)); |
| } else { |
| c = gl_buf[gl_pos-1]; |
| gl_buf[gl_pos-1] = gl_buf[gl_pos]; |
| gl_buf[gl_pos] = (char) c; |
| gl_extent = 2; |
| gl_fixup(gl_prompt, gl_pos-1, gl_pos); |
| } |
| } else |
| gl_beep(); |
| } |
| |
| static void |
| gl_newline(void) |
| /* |
| * Cleans up entire line before returning to caller. A \n is appended. |
| * If line longer than screen, we redraw starting at beginning |
| */ |
| { |
| int change = gl_cnt; |
| int len = gl_cnt; |
| int loc = gl_width - 5; /* shifts line back to start position */ |
| if (gl_cnt >= BUF_SIZE - 1) { |
| gl_error("\n*** Error: getline(): input buffer overflow\n"); |
| } |
| if (gl_out_hook) { |
| change = gl_out_hook(gl_buf); |
| len = strlen(gl_buf); |
| } |
| if (loc > len) |
| loc = len; |
| gl_fixup(gl_prompt, change, loc); /* must do this before appending \n */ |
| gl_buf[len] = '\n'; |
| gl_buf[len+1] = '\0'; |
| gl_putc('\n'); |
| } |
| |
| static void |
| gl_del(int loc) |
| /* |
| * Delete a character. The loc variable can be: |
| * -1 : delete character to left of cursor |
| * 0 : delete character under cursor |
| */ |
| { |
| int i; |
| |
| if(mbcslocale) { |
| int mb_len; |
| mbstate_t mb_st; |
| wchar_t wc; |
| |
| mb_len=0; |
| mbs_init(&mb_st); |
| |
| if ((loc == -1 && gl_pos > 0) || (loc == 0 && gl_pos < gl_cnt)) { |
| for(i = 0; i<= gl_pos + loc;) { |
| mbrtowc(&wc,gl_buf+i, MB_CUR_MAX, &mb_st); |
| mb_len = Ri18n_wcwidth(wc); |
| i += (wc==0) ? 0 : mb_len; |
| } |
| for (i = gl_pos+(loc*mb_len); i <= gl_cnt - mb_len; i++) |
| gl_buf[i] = gl_buf[i + mb_len]; |
| gl_fixup(gl_prompt,gl_pos+(loc * mb_len) , gl_pos+(loc * mb_len)); |
| } else |
| gl_beep(); |
| } else |
| if ((loc == -1 && gl_pos > 0) || (loc == 0 && gl_pos < gl_cnt)) { |
| for (i = gl_pos+loc; i < gl_cnt; i++) |
| gl_buf[i] = gl_buf[i+1]; |
| gl_fixup(gl_prompt, gl_pos+loc, gl_pos+loc); |
| } else |
| gl_beep(); |
| } |
| |
| static void |
| gl_kill(int pos) |
| |
| /* delete from pos to the end of line */ |
| { |
| if (pos < gl_cnt) { |
| strcpy(gl_killbuf, gl_buf + pos); |
| gl_buf[pos] = '\0'; |
| gl_fixup(gl_prompt, pos, pos); |
| } else |
| gl_beep(); |
| } |
| |
| static void |
| gl_killword(int direction) |
| { |
| int pos = gl_pos; |
| int startpos = gl_pos; |
| int tmp; |
| int i; |
| |
| if (direction > 0) { /* forward */ |
| while (!isspace(gl_buf[pos]) && pos < gl_cnt) |
| pos++; |
| while (isspace(gl_buf[pos]) && pos < gl_cnt) |
| pos++; |
| } else { /* backward */ |
| if (pos > 0) |
| pos--; |
| while (isspace(gl_buf[pos]) && pos > 0) |
| pos--; |
| while (!isspace(gl_buf[pos]) && pos > 0) |
| pos--; |
| if (pos < gl_cnt && isspace(gl_buf[pos])) /* move onto word */ |
| pos++; |
| } |
| if (pos < startpos) { |
| tmp = pos; |
| pos = startpos; |
| startpos = tmp; |
| } |
| memcpy(gl_killbuf, gl_buf + startpos, (size_t) (pos - startpos)); |
| gl_killbuf[pos - startpos] = '\0'; |
| if (isspace(gl_killbuf[pos - startpos - 1])) |
| gl_killbuf[pos - startpos - 1] = '\0'; |
| gl_fixup(gl_prompt, -1, startpos); |
| for (i=0, tmp=pos - startpos; i<tmp; i++) |
| gl_del(0); |
| } /* gl_killword */ |
| |
| static void |
| gl_word(int direction) |
| |
| /* move forward or backword one word */ |
| { |
| int pos = gl_pos; |
| |
| if (direction > 0) { /* forward */ |
| while (!isspace(gl_buf[pos]) && pos < gl_cnt) |
| pos++; |
| while (isspace(gl_buf[pos]) && pos < gl_cnt) |
| pos++; |
| } else { /* backword */ |
| if (pos > 0) |
| pos--; |
| while (isspace(gl_buf[pos]) && pos > 0) |
| pos--; |
| while (!isspace(gl_buf[pos]) && pos > 0) |
| pos--; |
| if (pos < gl_cnt && isspace(gl_buf[pos])) /* move onto word */ |
| pos++; |
| } |
| gl_fixup(gl_prompt, -1, pos); |
| } |
| |
| static void |
| gl_redraw(void) |
| /* emit a newline, reset and redraw prompt and current input line */ |
| { |
| if (gl_init_done > 0) { |
| gl_putc('\n'); |
| gl_fixup(gl_prompt, -2, gl_pos); |
| } |
| } |
| |
| static void |
| gl_fixup(const char *prompt, int change, int cursor) |
| |
| |
| /* |
| * This function is used both for redrawing when input changes or for |
| * moving within the input line. The parameters are: |
| * prompt: compared to last_prompt[] for changes; |
| * change : the index of the start of changes in the input buffer, |
| * with -1 indicating no changes, -2 indicating we're on |
| * a new line, redraw everything. |
| * cursor : the desired location of the cursor after the call. |
| * A value of BUF_SIZE can be used to indicate the cursor should |
| * move just past the end of the input line. |
| */ |
| { |
| static int gl_shift; /* index of first on screen character */ |
| static int off_right; /* true if more text right of screen */ |
| static int off_left; /* true if more text left of screen */ |
| static char last_prompt[CONSOLE_PROMPT_SIZE] = ""; |
| int left = 0, right = -1; /* bounds for redraw */ |
| int pad; /* how much to erase at end of line */ |
| int backup; /* how far to backup before fixing */ |
| int new_shift; /* value of shift based on cursor */ |
| int extra; /* adjusts when shift (scroll) happens */ |
| int i; |
| int new_right = -1; /* alternate right bound, using gl_extent */ |
| int l1, l2, ll; |
| |
| if (change == -2) { /* reset */ |
| while (gl_pos--) gl_putc('\b'); |
| gl_pos = gl_cnt = gl_shift = off_right = off_left = 0; |
| gl_puts(prompt); |
| strncpy(last_prompt, prompt, CONSOLE_PROMPT_SIZE-1); |
| change = 0; |
| gl_width = gl_termw - gl_strlen(prompt); |
| } else if (strcmp(prompt, last_prompt) != 0) { |
| l1 = gl_strlen(last_prompt); |
| l2 = gl_strlen(prompt); |
| ll = gl_pos + l1; |
| gl_cnt = gl_cnt + l1 - l2; |
| strncpy(last_prompt, prompt, CONSOLE_PROMPT_SIZE-1); |
| while (ll--) gl_putc('\b'); |
| gl_puts(prompt); |
| gl_pos = gl_shift; |
| gl_width = gl_termw - l2; |
| change = 0; |
| } |
| pad = (off_right)? gl_width - 1 : gl_cnt - gl_shift; /* old length */ |
| backup = gl_pos - gl_shift; |
| if (change >= 0) { |
| gl_cnt = strlen(gl_buf); |
| if (change > gl_cnt) |
| change = gl_cnt; |
| } |
| if (cursor > gl_cnt) { |
| if (cursor != BUF_SIZE) /* BUF_SIZE means end of line */ |
| gl_putc('\007'); |
| cursor = gl_cnt; |
| } |
| if (cursor < 0) { |
| gl_putc('\007'); |
| cursor = 0; |
| } |
| if (off_right || (off_left && cursor < gl_shift + gl_width - gl_scroll / 2)) |
| extra = 2; /* shift the scrolling boundary */ |
| else |
| extra = 0; |
| new_shift = cursor + extra + gl_scroll - gl_width; |
| if (new_shift > 0) { |
| new_shift /= gl_scroll; |
| new_shift *= gl_scroll; |
| } else |
| new_shift = 0; |
| if (new_shift != gl_shift) { /* scroll occurs */ |
| gl_shift = new_shift; |
| off_left = (gl_shift)? 1 : 0; |
| off_right = (gl_cnt > gl_shift + gl_width - 1)? 1 : 0; |
| left = gl_shift; |
| new_right = right = (off_right)? gl_shift + gl_width - 2 : gl_cnt; |
| } else if (change >= 0) { /* no scroll, but text changed */ |
| if (change < gl_shift + off_left) { |
| left = gl_shift; |
| } else { |
| left = change; |
| backup = gl_pos - change; |
| } |
| off_right = (gl_cnt > gl_shift + gl_width - 1)? 1 : 0; |
| right = (off_right)? gl_shift + gl_width - 2 : gl_cnt; |
| new_right = (gl_extent && (right > left + gl_extent))? |
| left + gl_extent : right; |
| } |
| pad -= (off_right)? gl_width - 1 : gl_cnt - gl_shift; |
| pad = (pad < 0)? 0 : pad; |
| if (left <= right) { /* clean up screen */ |
| for (i=0; i < backup; i++) |
| gl_putc('\b'); |
| if (left == gl_shift && off_left) { |
| gl_putc('$'); |
| left++; |
| } |
| for (i=left; i < new_right; i++) |
| gl_putc(gl_buf[i]); |
| gl_pos = new_right; |
| if (off_right && new_right == right) { |
| gl_putc('$'); |
| gl_pos++; |
| } else { |
| for (i=0; i < pad; i++) /* erase remains of prev line */ |
| gl_putc(' '); |
| gl_pos += pad; |
| } |
| } |
| i = gl_pos - cursor; /* move to final cursor location */ |
| if (i > 0) { |
| while (i--) |
| gl_putc('\b'); |
| } else { |
| for (i=gl_pos; i < cursor; i++) |
| gl_putc(gl_buf[i]); |
| } |
| gl_pos = cursor; |
| } |
| |
| static int |
| gl_tab(char *buf, int offset, int *loc) |
| /* default tab handler, acts like tabstops every 8 cols */ |
| { |
| int i, count, len; |
| |
| len = strlen(buf); |
| count = 8 - (offset + *loc) % 8; |
| for (i=len; i >= *loc; i--) |
| buf[i+count] = buf[i]; |
| for (i=0; i < count; i++) |
| buf[*loc+i] = ' '; |
| i = *loc; |
| *loc = i + count; |
| return i; |
| } |
| |
| /******************* strlen stuff **************************************/ |
| |
| void gl_strwidth(func) |
| size_t (*func)(); |
| { |
| if (func != 0) { |
| gl_strlen = func; |
| } |
| } |
| |
| /******************* History stuff **************************************/ |
| |
| static int HIST_SIZE = 512; |
| static int hist_pos = 0, hist_last = 0, gl_beep_on = 1; |
| static char **hist_buf; |
| |
| void |
| gl_hist_init(int size, int beep) |
| { |
| int i; |
| |
| HIST_SIZE = size; |
| hist_buf = (char **) malloc(size * sizeof(char *)); |
| if(!hist_buf) |
| gl_error("\n*** Error: gl_hist_init() failed on malloc\n"); |
| hist_buf[0] = ""; |
| for (i = 1; i < HIST_SIZE; i++) |
| hist_buf[i] = (char *)0; |
| hist_pos = hist_last = 0; |
| gl_init_done = 0; |
| gl_beep_on = beep; |
| } |
| |
| void |
| gl_histadd(const char *buf) |
| { |
| const char *p = buf; |
| |
| /* in case we call gl_histadd() before we call getline() */ |
| if (gl_init_done < 0) { /* -1 only on startup */ |
| gl_hist_init(512, 1); |
| gl_init_done = 0; |
| } |
| while (*p == ' ' || *p == '\t' || *p == '\n') |
| p++; |
| if (*p) { |
| hist_buf[hist_last] = hist_save(buf); |
| hist_last = hist_last + 1; |
| if(hist_last > HIST_SIZE - 1) { |
| int i, size = HIST_SIZE + 512; |
| hist_buf = (char **) realloc(hist_buf, size * sizeof(char *)); |
| if(!hist_buf) |
| gl_error("\n*** Error: gl_histadd() failed on realloc\n"); |
| for(i = HIST_SIZE; i < size; i++) |
| hist_buf[i] = (char *)0; |
| HIST_SIZE = size; |
| } |
| hist_buf[hist_last] = ""; |
| } |
| hist_pos = hist_last; |
| } |
| |
| char * |
| gl_hist_prev(void) |
| /* loads previous hist entry into input buffer, sticks on first */ |
| { |
| char *p = 0; |
| int next = hist_pos - 1; |
| |
| if (hist_buf[hist_pos] != 0 && next >= 0) { |
| hist_pos = next; |
| p = hist_buf[hist_pos]; |
| } |
| if (p == 0) { |
| p = ""; |
| gl_beep(); |
| } |
| return p; |
| } |
| |
| char * |
| gl_hist_next(void) |
| /* loads next hist entry into input buffer, clears on last */ |
| { |
| char *p = 0; |
| |
| if (hist_pos != hist_last) { |
| hist_pos = hist_pos+1; |
| p = hist_buf[hist_pos]; |
| } |
| if (p == 0) { |
| p = ""; |
| gl_beep(); |
| } |
| return p; |
| } |
| |
| static char * |
| hist_save(const char *p) |
| |
| /* makes a copy of the string */ |
| { |
| char *s = 0; |
| int len = strlen(p); |
| char *nl = strchr(p, '\n'); |
| |
| if (nl) { |
| if ((s = (char *) malloc(len)) != 0) { |
| strncpy(s, p, len-1); |
| s[len-1] = 0; |
| } |
| } else { |
| if ((s = (char *) malloc(len+1)) != 0) { |
| strcpy(s, p); |
| } |
| } |
| if (s == 0) |
| gl_error("\n*** Error: hist_save() failed on malloc\n"); |
| return s; |
| } |
| |
| void gl_savehistory(const char *file, int size) |
| { |
| FILE *fp; |
| int i, init; |
| |
| if (!file || !hist_last) return; |
| fp = fopen(file, "w"); |
| if (!fp) { |
| char msg[256]; |
| sprintf(msg, "Unable to open %s", file); |
| R_ShowMessage(msg); |
| return; |
| } |
| init = hist_last - size; |
| init = (init < 0) ? 0 : init; |
| for (i = init; i < hist_last; i++) |
| fprintf(fp, "%s\n", hist_buf[i]); |
| fclose(fp); |
| } |
| |
| void gl_loadhistory(const char *file) |
| { |
| FILE *fp; |
| int i; |
| char buf[1000]; |
| |
| if (!file) return; |
| fp = fopen(file, "r"); |
| if (!fp) { |
| return; |
| } |
| for(i = 0;; i++) { |
| if(!fgets(buf, 1000, fp)) break; |
| gl_histadd(buf); |
| } |
| fclose(fp); |
| } |
| |
| |
| /******************* Search stuff **************************************/ |
| |
| static char search_prompt[101]; /* prompt includes search string */ |
| static char search_string[100]; |
| static int search_pos = 0; /* current location in search_string */ |
| static int search_forw_flg = 0; /* search direction flag */ |
| static int search_last = 0; /* last match found */ |
| |
| static void |
| search_update(int c) |
| { |
| if (c == 0) { |
| search_pos = 0; |
| search_string[0] = 0; |
| search_prompt[0] = '?'; |
| search_prompt[1] = ' '; |
| search_prompt[2] = 0; |
| } else if (c > 0) { |
| search_string[search_pos] = (char) c; |
| search_string[search_pos+1] = (char) 0; |
| search_prompt[search_pos] = (char) c; |
| search_prompt[search_pos+1] = (char) '?'; |
| search_prompt[search_pos+2] = (char) ' '; |
| search_prompt[search_pos+3] = (char) 0; |
| search_pos++; |
| } else { |
| if (search_pos > 0) { |
| search_pos--; |
| search_string[search_pos] = (char) 0; |
| search_prompt[search_pos] = (char) '?'; |
| search_prompt[search_pos+1] = (char) ' '; |
| search_prompt[search_pos+2] = (char) 0; |
| } else { |
| gl_beep(); |
| hist_pos = hist_last; |
| } |
| } |
| } |
| |
| static void |
| search_addchar(int c) |
| { |
| char *loc; |
| |
| search_update(c); |
| if (c < 0) { |
| if (search_pos > 0) { |
| hist_pos = search_last; |
| } else { |
| gl_buf[0] = 0; |
| hist_pos = hist_last; |
| } |
| strncpy(gl_buf, hist_buf[hist_pos],BUF_SIZE-2); |
| gl_buf[BUF_SIZE-2] = '\0' ; |
| } |
| if ((loc = strstr(gl_buf, search_string)) != 0) { |
| gl_fixup(search_prompt, 0, loc - gl_buf); |
| } else if (search_pos > 0) { |
| if (search_forw_flg) { |
| search_forw(0); |
| } else { |
| search_back(0); |
| } |
| } else { |
| gl_fixup(search_prompt, 0, 0); |
| } |
| } |
| |
| static void |
| search_term(void) |
| { |
| gl_search_mode = 0; |
| if (gl_buf[0] == 0) /* not found, reset hist list */ |
| hist_pos = hist_last; |
| if (gl_in_hook) |
| gl_in_hook(gl_buf); |
| gl_fixup(gl_prompt, 0, gl_pos); |
| } |
| |
| static void |
| search_back(int new_search) |
| { |
| int found = 0; |
| char *p, *loc; |
| |
| search_forw_flg = 0; |
| if (gl_search_mode == 0) { |
| search_last = hist_pos = hist_last; |
| search_update(0); |
| gl_search_mode = 1; |
| gl_buf[0] = 0; |
| gl_fixup(search_prompt, 0, 0); |
| } else if (search_pos > 0) { |
| while (!found) { |
| p = gl_hist_prev(); |
| if (*p == 0) { /* not found, done looking */ |
| gl_buf[0] = 0; |
| gl_fixup(search_prompt, 0, 0); |
| found = 1; |
| } else if ((loc = strstr(p, search_string)) != 0) { |
| strncpy(gl_buf, p, BUF_SIZE-2); |
| gl_buf[BUF_SIZE-2] = '\0'; |
| gl_fixup(search_prompt, 0, loc - p); |
| if (new_search) |
| search_last = hist_pos; |
| found = 1; |
| } |
| } |
| } else { |
| gl_beep(); |
| } |
| } |
| |
| static void |
| search_forw(int new_search) |
| { |
| int found = 0; |
| char *p, *loc; |
| |
| search_forw_flg = 1; |
| if (gl_search_mode == 0) { |
| search_last = hist_pos = hist_last; |
| search_update(0); |
| gl_search_mode = 1; |
| gl_buf[0] = 0; |
| gl_fixup(search_prompt, 0, 0); |
| } else if (search_pos > 0) { |
| while (!found) { |
| p = gl_hist_next(); |
| if (*p == 0) { /* not found, done looking */ |
| gl_buf[0] = 0; |
| gl_fixup(search_prompt, 0, 0); |
| found = 1; |
| } else if ((loc = strstr(p, search_string)) != 0) { |
| strncpy(gl_buf, p, BUF_SIZE-2); |
| gl_buf[BUF_SIZE-2] = '\0'; |
| gl_fixup(search_prompt, 0, loc - p); |
| if (new_search) |
| search_last = hist_pos; |
| found = 1; |
| } |
| } |
| } else { |
| gl_beep(); |
| } |
| } |
| |
| static void |
| gl_beep(void) |
| { |
| if(gl_beep_on) MessageBeep(MB_OK); |
| } /* gl_beep */ |
