+++ /dev/null
-/* GNUPLOT - readline.c */
-/*
- * Copyright (C) 1986 - 1993 Thomas Williams, Colin Kelley
- *
- * Permission to use, copy, and distribute this software and its
- * documentation for any purpose with or without fee is hereby granted,
- * provided that the above copyright notice appear in all copies and
- * that both that copyright notice and this permission notice appear
- * in supporting documentation.
- *
- * Permission to modify the software is granted, but not the right to
- * distribute the modified code. Modifications are to be distributed
- * as patches to released version.
- *
- * This software is provided "as is" without express or implied warranty.
- *
- *
- * AUTHORS
- *
- * Original Software:
- * Tom Tkacik
- *
- * HISTORY:
- * Enhancements:
- * Gershon Elber and many others.
- *
- * Ed Breen (Jun 10 08:11:14 EST 1996)
- * Stripped down: EiC port.
- * Added standalone capability -- for testing and experimenting:
- * To make the stand alone version of readline:
- * gcc -D_STANDALONE -Wall -o readline readline.c
- * Added a limiter to the history recording mechanism:
- * The default limit means that only the last 500 lines
- * can be recalled. This can be set via the macro _HistLimit.
- * Note, by setting _HistLimit to 0, effectively turns off the
- * limiter; that is,
- * gcc -D_STANDALONE -D_HistLimit=0 -Wall -o readline readline.c
- * Added tab recognition -- no, not file completion.
- * Added show_history.
- * void EiC_show_history(FILE *fp)
- * outputs the history list to stream fp.
- * last_history.
- * returns a pointer to the last entered string in the history
- * list. Will return NULL if no entry exists.
- * Do not attempt to free this space, it is under control
- * of history.
- * Added bracket balancing routine:
- * void backupTo(char to, char from);
- * Optimized for speedy cursor movements:
- * Tested under:
- * ultrix, solaris, dec alpha, sunos, linux, irix-5.3, irix-6.x.
- * Ed Breen (July 17 1999)
- * Added win95, win98, NT win32 support
- * Ed Breen (July 16 2000)
- * Added DJGPP support
- */
-
-/* a small version of GNU's readline */
-/* this is not the BASH or GNU EMACS version of READLINE due to Copyleft
- restrictions */
-/* do not need any terminal capabilities except , */
-
-
-/* NANO-EMACS line editing facility */
-/* printable characters print as themselves (insert not overwrite) */
-/* ^A moves to the beginning of the line */
-/* ^B moves back a single character */
-/* ^E moves to the end of the line */
-/* ^F moves forward a single character */
-/* ^K kills from current position to the end of line */
-/* ^P moves back through history */
-/* ^N moves forward through history */
-/* ^H and DEL delete the previous character */
-/* ^D deletes the current character, or EOF if line is empty */
-/* ^L/^R redraw line in case it gets trashed */
-/* ^U kills the entire line */
-/* ^W kills last word */
-/* LF and CR return the entire line regardless of the cursor postition */
-/* EOF with an empty line returns (char *)NULL */
-
-/* all other characters are ignored */
-
-#ifndef NO_READLINE
-
-/*#define _POSIX_SOURCE*/
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <ctype.h>
- #include <signal.h>
- #include <time.h>
-
-#if defined(WIN32)
-
-#include <conio.h>
-#include <io.h>
-
-# define special_getc() msdos_getch()
-static char msdos_getch();
-
-#else
-
-#include <unistd.h>
-#include <termios.h>
-
-#define special_getc() ansi_getc()
-static int ansi_getc();
-
-/* watch out for SV4 and BSD+4.3 stuff */
-#ifndef VREPRINT
-#define VREPRINT 18
-#endif
-#ifndef VWERASE
-#define VWERASE 23
-#endif
-#ifndef SIGTSTP
-#define SIGTSTP 26
-#endif
-
-#endif
-
-#ifndef CLOCKS_PER_SEC
-#define CLOCKS_PER_SEC 1000000
-#endif
-
-
-/* stubbs added by Ed Breen */
-#define ralloc(x,y,z) realloc(x,y)
-#define alloc(x,y) malloc(x)
-#define int_error(text,code) {fprintf(stderr,"Fatal error..\n");\
- fprintf(stderr,"%s\n",text);\
- fprintf(stderr,"...now exiting to system ...\n");\
- exit(1);}
-
-#if !defined(WIN32)
-
-static struct termios orig_termio, rl_termio;
-
-/* ULTRIX defines VRPRNT instead of VREPRINT */
-#if defined(VRPRNT) && !defined(VREPRINT)
-#define VREPRINT VRPRNT
-#endif
-
-/* define characters to use with our input character handler */
-static char term_chars[NCCS];
-
-static int term_set = 0; /* =1 if rl_termio set */
-
-#endif
-
-
-#define MAXBUF 512 /* initial size and increment of input line length */
-#define BACKSPACE 0x08 /* ^H */
-#define SPACE ' '
-#define NEWLINE '\n'
-#define BELL '\a'
-#define TABSTOPS 4 /* number of spaces per tab stop */
-
-struct hist {
- char *line;
- struct hist *prev;
- struct hist *next;
-};
-
-static struct hist *history = NULL; /* no history yet */
-static struct hist *EndHist = NULL; /* end of history list */
-static struct hist *cur_entry = NULL;
-
-
-static char *cur_line; /* current contents of the line */
-static int line_len=0;
-static int cur_pos = 0; /* current position of the cursor */
-static int max_pos = 0; /* maximum character position */
-static int HistLineNo = 0; /* Current Line Number in history list */
-
-static void fix_line (void) ;
-static void redraw_line (char *prompt) ;
-static void clear_line (char *prompt) ;
-static void clear_eoline (void) ;
-static void copy_line (char *line) ;
-static void set_termio (void) ;
-static void reset_termio (void) ;
-static int ansi_getc (void) ;
-static void user_putc (char ch) ;
-static int user_putsn(char *str, int n) ;
-
-static void extend_cur_line (void) ;
-static void backupTo(char to, char from);
-static char _BS = BACKSPACE;
-
-#if defined(WIN32)
-#define backspace() _putch(BACKSPACE)
-#else
-#define backspace() write(STDIN_FILENO,&_BS,1)
-#endif
-
-#define user_puts(x) user_putsn(x,strlen(x))
-
-
-void delay(clock_t d)
-{
- clock_t et = clock() + d;
- while(et> clock());
-}
-
-static void user_putc(char ch)
-{
-#if defined(WIN32)
- _putch(ch);
-#else
- write(STDIN_FILENO,&ch,1);
-#endif
-
-}
-
-static int user_putsn(char *str, int n)
-{
- int rv;
-#if defined(WIN32)
- for(rv=0;rv<n;rv++)
- _putch(*str++);
-#else
- rv = write(STDIN_FILENO,str,n);
-#endif
- return rv;
-}
-
-static void extend_cur_line()
-{
- char *new_line;
-
- /* extent input line length */
- new_line=ralloc(cur_line, line_len+MAXBUF, NULL);
- if(!new_line) {
- reset_termio();
- int_error("Can't extend readline length", NO_CARET);
- }
- cur_line=new_line;
- line_len+=MAXBUF;
-
-}
-
-unsigned char * EiC_readline(char *prompt)
-{
-
- /* start with a string of MAXBUF chars */
- char * editLine(char *);
- if(line_len!=0) {
- free(cur_line);
- line_len=0;
- }
-
- cur_line=alloc((unsigned long)MAXBUF, "readline");
- line_len=MAXBUF;
-
- /* set the termio so we can do our own input processing */
- set_termio();
-
- /* print the prompt */
-
- user_puts(prompt);
- cur_line[0] = '\0';
- cur_pos = 0;
- max_pos = 0;
- cur_entry = NULL;
- return editLine(prompt);
-}
-
-
-char * editLine(char *prompt)
-{
- /* The line to be edited is stored in cur_line.*/
- /* get characters */
- int cur_char;
-
- for(;;) {
- cur_char = special_getc();
-
- if(isprint(cur_char) || (((unsigned char)cur_char > 0x7f) &&
- cur_char != EOF) || cur_char == '\t') {
- int i,inc = 1;
- if(cur_char == '\t') {
- inc = TABSTOPS;
- cur_char = ' ';
- }
-
-
- if(max_pos+inc>=line_len)
- extend_cur_line();
-
- for(i=max_pos+inc-1; i-inc>=cur_pos; i--) {
- cur_line[i] = cur_line[i-inc];
- }
- max_pos += inc;
- while(inc--) {
- user_putc(cur_char);
- cur_line[cur_pos++] = cur_char;
- }
- if (cur_pos < max_pos)
- fix_line();
- cur_line[max_pos] = '\0';
- switch(cur_char) {
- case ')':backupTo('(',')');break;
- case ']':backupTo('[',']');break;
- }
-#if defined(VERASE)
- } else if(cur_char == term_chars[VERASE] ){ /* DEL? */
- if(cur_pos > 0) {
- int i;
- cur_pos -= 1;
- backspace();
- for(i=cur_pos; i<max_pos; i++)
- cur_line[i] = cur_line[i+1];
- max_pos -= 1;
- fix_line();
- }
- } else if(cur_char == term_chars[VEOF] ){ /* ^D? */
- if(max_pos == 0) {
- copy_line("to exit EiC, enter :exit\n");
- user_putc(BELL);
-
- reset_termio();
- return((char*)NULL);
- }
- if((cur_pos < max_pos)&&(cur_char == 004)) { /* ^D */
- int i;
- for(i=cur_pos; i<max_pos; i++)
- cur_line[i] = cur_line[i+1];
- max_pos -= 1;
- fix_line();
- }
-
- } else if(cur_char == term_chars[VKILL] ){ /* ^U? */
- clear_line(prompt);
-
- } else if(cur_char == term_chars[VWERASE] ){ /* ^W? */
- while((cur_pos > 0) &&
- (cur_line[cur_pos-1] == SPACE)) {
- cur_pos -= 1;
- backspace();
- }
- while((cur_pos > 0) &&
- (cur_line[cur_pos-1] != SPACE)) {
- cur_pos -= 1;
- backspace();
- }
- clear_eoline();
- max_pos = cur_pos;
-
-
- } else if(cur_char == term_chars[VREPRINT] ){ /* ^R? */
- user_putc(NEWLINE); /* go to a fresh line */
- redraw_line(prompt);
-
-
- } else if(cur_char == term_chars[VSUSP]) {
- reset_termio();
- kill(0, SIGTSTP);
-
- /* process stops here */
-
- set_termio();
- /* print the prompt */
- redraw_line(prompt);
-#endif
- } else {
- /* do normal editing commands */
- /* some of these are also done above */
- int i;
- switch(cur_char) {
- case EOF:
- reset_termio();
- return((char *)NULL);
- case 001: /* ^A */
- while(cur_pos > 0) {
- cur_pos -= 1;
- backspace();
- }
- break;
- case 002: /* ^B */
- if(cur_pos > 0) {
- cur_pos -= 1;
- backspace();
- }
- break;
- case 005: /* ^E */
- while(cur_pos < max_pos) {
- user_putc(cur_line[cur_pos]);
- cur_pos += 1;
- }
- break;
- case 006: /* ^F */
- if(cur_pos < max_pos) {
- user_putc(cur_line[cur_pos]);
- cur_pos += 1;
- }
- break;
- case 013: /* ^K */
- clear_eoline();
- max_pos = cur_pos;
- break;
-
- case 020: /* ^P */
- if(history != NULL) {
- if(cur_entry == NULL) {
- cur_entry = history;
- clear_line(prompt);
- copy_line(cur_entry->line);
- } else if(cur_entry->prev != NULL) {
- cur_entry = cur_entry->prev;
- clear_line(prompt);
- copy_line(cur_entry->line);
- }else
- user_putc(BELL);
- }else
- user_putc(BELL);
- break;
-
- case 016: /* ^N */
- if(cur_entry != NULL) {
- cur_entry = cur_entry->next;
- clear_line(prompt);
- if(cur_entry != NULL)
- copy_line(cur_entry->line);
- else
- cur_pos = max_pos = 0;
- }else
- user_putc(BELL);
- break;
- case 014: /* ^L */
- case 022: /* ^R */
- user_putc(NEWLINE); /* go to a fresh line */
- redraw_line(prompt);
- break;
- case 0177: /* DEL */
- case 010: /* ^H */
- if(cur_pos > 0) {
- cur_pos -= 1;
- backspace();
- for(i=cur_pos; i<max_pos; i++)
- cur_line[i] = cur_line[i+1];
- max_pos -= 1;
- fix_line();
- }
- break;
- case 004: /* ^D */
- if(max_pos == 0) {
- reset_termio();
- return((char *)NULL);
- }
- if(cur_pos < max_pos) {
- for(i=cur_pos; i<max_pos; i++)
- cur_line[i] = cur_line[i+1];
- max_pos -= 1;
- fix_line();
- }
- break;
- case 025: /* ^U */
- clear_line(prompt);
- break;
- case 027: /* ^W */
- while((cur_pos > 0) &&
- (cur_line[cur_pos-1] == SPACE)) {
- cur_pos -= 1;
- backspace();
- }
- while((cur_pos > 0) &&
- (cur_line[cur_pos-1] != SPACE)) {
- cur_pos -= 1;
- backspace();
- }
- clear_eoline();
- max_pos = cur_pos;
- break;
- case '\n': /* ^J */
- case '\r': /* ^M */
- user_putc(NEWLINE);
- cur_line[max_pos+1] = '\0';
- cur_line = (char *)ralloc(cur_line,
- (unsigned
- long)(strlen(cur_line)+2),
- "line resize");
- line_len=0;
-
- reset_termio();
- return cur_line;
- default:
- break;
- }
- }
- }
-}
-
-
-/* fix up the line from cur_pos to max_pos */
-/* do not need any terminal capabilities except backspace, */
-/* and space overwrites a character */
-static void fix_line()
-{
- int i;
-
- /* write tail of string */
- user_putsn(&cur_line[cur_pos],max_pos - cur_pos);
-
-
- /* write a space at the end of the line in case we deleted one */
- user_putc(SPACE);
-
- /* backup to original position */
- for(i=max_pos+1; i>cur_pos; i--)
- backspace();
-
-}
-
-/* redraw the entire line, putting the cursor where it belongs */
-static void redraw_line(char *prompt)
-{
- int i;
-
- user_puts(prompt);
- user_puts(cur_line);
-
- /* put the cursor where it belongs */
- for(i=max_pos; i>cur_pos; i--)
- backspace();
-}
-
-/* clear cur_line and the screen line */
-static void clear_line(char *prompt)
-{
- int i;
-
- memset(cur_line,0,max_pos);
-
- for(i=cur_pos; i>0; i--)
- backspace();
-
- for(i=0; i<max_pos; i++)
- user_putc(SPACE);
-
- user_putc('\r');
- user_puts(prompt);
-
- cur_pos = 0;
- max_pos = 0;
-}
-
-static void backupTo(char to, char from)
-{
- int cmode = 0;
- int k = 1,i = cur_pos-1;
-
- backspace();
- while(i-- > 0) {
- backspace();
- if(cur_line[i] == '\'') {
- if(cmode & 1)
- cmode &= ~1;
- else
- cmode |= 1;
- continue;
- }else if(cur_line[i] == '\"') {
- if(cmode & 2)
- cmode &= ~2;
- else
- cmode |= 2;
- continue;
- }
-
- if(cur_line[i] == to && !cmode) {
- if(!--k)
- break;
- }else if(cur_line[i] == from && !cmode)
- k++;
- }
- if(k) {
- user_putc(BELL);
- i = 0;
- } else
- delay(CLOCKS_PER_SEC / 2);
-
- user_putsn(&cur_line[i],cur_pos - i);
-
-}
-
-/* clear to end of line and the screen end of line */
-static void clear_eoline()
-{
- int i;
- for(i=cur_pos; i<max_pos; i++)
- cur_line[i] = '\0';
-
- for(i=cur_pos; i<max_pos; i++)
- user_putc(SPACE);
- for(i=cur_pos; i<max_pos; i++)
- backspace();
-}
-
-/* copy line to cur_line, draw it and set cur_pos and max_pos */
-static void copy_line(char *line)
-{
- while(strlen(line)+1>line_len) {
- extend_cur_line();
- }
- strcpy(cur_line, line);
- user_puts(cur_line);
- cur_pos = max_pos = strlen(cur_line);
-}
-
-/* add line to the history */
-#ifndef _HistLimit /* history limiter */
-#define _HistLimit 500
-#endif
-
-void EiC_add_history(unsigned char *line)
-{
- static unsigned int limit = 0;
- struct hist *entry;
-
- if(limit == _HistLimit && EndHist) {
- free(EndHist->line);
- entry = EndHist;
- EndHist = EndHist->next;
- EndHist->prev = NULL;
- } else {
- entry = (struct hist *)alloc((unsigned long)sizeof(struct hist),"history");
- limit++;
- }
- entry->line = alloc((unsigned long)(strlen(line)+1),"history");
- strcpy(entry->line, line);
-
- entry->prev = history;
- entry->next = NULL;
- if(history != NULL) {
- history->next = entry;
- } else /* get first entry */
- EndHist = entry;
-
- history = entry;
- HistLineNo++;
-}
-
-int EiC_getHistLineNo()
-{
- return HistLineNo;
-}
-
-void EiC_save_history(FILE *to, int from)
-{
- int cl = HistLineNo - 1;
- struct hist *p;
- p = history;
- while(cl-- > from)
- p = p->prev;
- while(p) {
- fprintf(to,"%s\n",p->line);
- p = p->next;
- }
-}
-
-/* show all history lines */
-void EiC_show_history(FILE *fp)
-{
- struct hist *p;
- p = EndHist;
- while(p) {
- fputs(p->line,fp);
- putc(NEWLINE,fp);
- p = p->next;
- }
- fflush(fp);
-}
-
-int EiC_load_history(char * fname, int prompt)
-{
-#define BufSz 512
-
- int i;
- char buff[BufSz];
- char *line;
-
- FILE *fp = fopen(fname,"r");
- if(prompt)
- set_termio();
- if(fp) {
- while(fgets(buff,BufSz-2,fp)) {
- for(i=0;buff[i] && buff[i] != '\n';++i)
- ;
- if(!buff[i])
- buff[i++] = '\\';
- buff[i] = 0;
- if(prompt) {
- printf("Re-enter [%s] (Y/N/E)?",buff);
- switch(special_getc()) {
- case 'y':
- case 'Y':
- user_puts(" Y\n");
- break;
- case 'e':
- case 'E':
- user_puts(" E\n");
- copy_line(buff);
- line = editLine("edit: ");
- if(*line)
- EiC_add_history(line);
- free(line);
- set_termio();
- continue;
- default:
- user_puts(" N\n");
- continue;
-
- }
- }
- EiC_add_history(buff);
- }
- fclose(fp);
- i = 1;
- } else
- i = 0;
- if(prompt)
- reset_termio();
- printf("added %d lines\n",HistLineNo);
- return i;
-
-#undef BufSz
-}
-
-
-#if defined(WIN32)
-
-/* Convert Arrow keystrokes to Control characters: */
-static char msdos_getch()
-{
- int c = _getch();
- if (c == 224 || c== 0) {
- c = _getch(); /* Get the extended code. */
- switch (c) {
- case 75: /* Left Arrow. */
- c = 002;
- break;
- case 77: /* Right Arrow. */
- c = 006;
- break;
- case 72: /* Up Arrow. */
- c = 020;
- break;
- case 80: /* Down Arrow. */
- c = 016;
- break;
- case 115: /* Ctl Left Arrow. */
- case 71: /* Home */
- c = 001;
- break;
- case 116: /* Ctl Right Arrow. */
- case 79: /* End */
- c = 005;
- break;
- case 83: /* Delete */
- c = 004;
- break;
- default:
- c = 0;
- break;
- }
- } else if (c == 033) { /* ESC */
- c = 025;
- }
- return c;
-}
-
-static void set_termio() {}
-static void reset_termio() {}
-
-#else
-
-/* Convert ANSI arrow keys to control characters */
-static int ansi_getc()
-{
- int c = getc(stdin);
- if (c == 033) {
- c = getc(stdin); /* check for CSI */
- if (c == '[') {
- c = getc(stdin); /* get command character */
- switch (c) {
- case 'D': /* left arrow key */
- c = 002;
- break;
- case 'C': /* right arrow key */
- c = 006;
- break;
- case 'A': /* up arrow key */
- c = 020;
- break;
-
- case 'B': /* down arrow key */
- c = 016;
- break;
- }
- }
- }
- return c;
-}
-
-/* set termio so we can do our own input processing */
-static void set_termio()
-{
- if(term_set == 0) {
- tcgetattr(0, &orig_termio);
- rl_termio = orig_termio;
- rl_termio.c_iflag &= ~(BRKINT|PARMRK|INPCK/*|IUCLC*/|IXON|IXOFF);
- rl_termio.c_iflag |= (IGNBRK|IGNPAR);
- /* rl_termio.c_oflag &= ~(ONOCR); Costas Sphocleous Irvine,CA */
- rl_termio.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL|NOFLSH);
- rl_termio.c_lflag |= (ISIG);
- rl_termio.c_cc[VMIN] = 1;
- rl_termio.c_cc[VTIME] = 0;
- term_chars[VERASE] = orig_termio.c_cc[VERASE];
- term_chars[VEOF] = orig_termio.c_cc[VEOF];
- term_chars[VKILL] = orig_termio.c_cc[VKILL];
- term_chars[VWERASE] = orig_termio.c_cc[VWERASE];
- term_chars[VREPRINT] = orig_termio.c_cc[VREPRINT];
- term_chars[VSUSP] = orig_termio.c_cc[VSUSP];
- /* disable suspending process on ^Z */
- rl_termio.c_cc[VSUSP] = 0;
- tcsetattr(0, TCSADRAIN, &rl_termio);
- term_set = 1;
- }
-
-}
-
-static void reset_termio()
-{
- if(term_set == 1) {
- tcsetattr(0, TCSADRAIN, &orig_termio);
- term_set = 0;
- }
-}
-
-#endif
-
-#ifdef _STANDALONE
-int main()
-{
- char * line = NULL;
- printf("**Press ^D in empty line to exit**\n");
- do {
- line = EiC_readline("$$> ");
- if (line) {
- if(*line)
- EiC_add_history(line);
- free(line);
- }
- } while(line);
- printf("\n-----------------\n");
- EiC_show_history(stdout);
- return 0;
-}
-#endif
-
-#endif
-
projects / opencv / blobdiff