| /* linenoise.c -- guerrilla line editing library against the idea that a |
| * line editing lib needs to be 20,000 lines of C code. |
| * |
| * You can find the latest source code at: |
| * |
| * http://github.com/antirez/linenoise |
| * |
| * Does a number of crazy assumptions that happen to be true in 99.9999% of |
| * the 2010 UNIX computers around. |
| * |
| * ------------------------------------------------------------------------ |
| * |
| * Copyright (c) 2010, Salvatore Sanfilippo <antirez at gmail dot com> |
| * Copyright (c) 2010, Pieter Noordhuis <pcnoordhuis at gmail dot com> |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * ------------------------------------------------------------------------ |
| * |
| * References: |
| * - http://invisible-island.net/xterm/ctlseqs/ctlseqs.html |
| * - http://www.3waylabs.com/nw/WWW/products/wizcon/vt220.html |
| * |
| * Todo list: |
| * - Switch to gets() if $TERM is something we can't support. |
| * - Filter bogus Ctrl+<char> combinations. |
| * - Win32 support |
| * |
| * Bloat: |
| * - Completion? |
| * - History search like Ctrl+r in readline? |
| * |
| * List of escape sequences used by this program, we do everything just |
| * with three sequences. In order to be so cheap we may have some |
| * flickering effect with some slow terminal, but the lesser sequences |
| * the more compatible. |
| * |
| * CHA (Cursor Horizontal Absolute) |
| * Sequence: ESC [ n G |
| * Effect: moves cursor to column n |
| * |
| * EL (Erase Line) |
| * Sequence: ESC [ n K |
| * Effect: if n is 0 or missing, clear from cursor to end of line |
| * Effect: if n is 1, clear from beginning of line to cursor |
| * Effect: if n is 2, clear entire line |
| * |
| * CUF (CUrsor Forward) |
| * Sequence: ESC [ n C |
| * Effect: moves cursor forward of n chars |
| * |
| * The following are used to clear the screen: ESC [ H ESC [ 2 J |
| * This is actually composed of two sequences: |
| * |
| * cursorhome |
| * Sequence: ESC [ H |
| * Effect: moves the cursor to upper left corner |
| * |
| * ED2 (Clear entire screen) |
| * Sequence: ESC [ 2 J |
| * Effect: clear the whole screen |
| * |
| */ |
| |
| #include <termios.h> |
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <sys/types.h> |
| #include <sys/ioctl.h> |
| #include <unistd.h> |
| #include "linenoise.h" |
| |
| #define LINENOISE_DEFAULT_HISTORY_MAX_LEN 100 |
| #define LINENOISE_MAX_LINE 4096 |
| static char *unsupported_term[] = {"dumb","cons25",NULL}; |
| static linenoiseCompletionCallback *completionCallback = NULL; |
| |
| static struct termios orig_termios; /* in order to restore at exit */ |
| static int rawmode = 0; /* for atexit() function to check if restore is needed*/ |
| static int atexit_registered = 0; /* register atexit just 1 time */ |
| static int history_max_len = LINENOISE_DEFAULT_HISTORY_MAX_LEN; |
| static int history_len = 0; |
| char **history = NULL; |
| |
| /* The linenoiseState structure represents the state during line editing. |
| * We pass this state to functions implementing specific editing |
| * functionalities. */ |
| struct linenoiseState { |
| int fd; /* Terminal file descriptor. */ |
| char *buf; /* Edited line buffer. */ |
| size_t buflen; /* Edited line buffer size. */ |
| const char *prompt; /* Prompt to display. */ |
| size_t plen; /* Prompt length. */ |
| size_t pos; /* Current cursor position. */ |
| size_t len; /* Current edited line length. */ |
| size_t cols; /* Number of columns in terminal. */ |
| int history_index; /* The history index we are currently editing. */ |
| }; |
| |
| static void linenoiseAtExit(void); |
| int linenoiseHistoryAdd(const char *line); |
| |
| /* Return true if the terminal name is in the list of terminals we know are |
| * not able to understand basic escape sequences. */ |
| static int isUnsupportedTerm(void) { |
| char *term = getenv("TERM"); |
| int j; |
| |
| if (term == NULL) return 0; |
| for (j = 0; unsupported_term[j]; j++) |
| if (!strcasecmp(term,unsupported_term[j])) return 1; |
| return 0; |
| } |
| |
| /* Free the history, but does not reset it. Only used when we have to |
| * exit() to avoid memory leaks are reported by valgrind & co. */ |
| static void freeHistory(void) { |
| if (history) { |
| int j; |
| |
| for (j = 0; j < history_len; j++) |
| free(history[j]); |
| free(history); |
| } |
| } |
| |
| /* Raw mode: 1960 magic shit. */ |
| static int enableRawMode(int fd) { |
| struct termios raw; |
| |
| if (!isatty(STDIN_FILENO)) goto fatal; |
| if (!atexit_registered) { |
| atexit(linenoiseAtExit); |
| atexit_registered = 1; |
| } |
| if (tcgetattr(fd,&orig_termios) == -1) goto fatal; |
| |
| raw = orig_termios; /* modify the original mode */ |
| /* input modes: no break, no CR to NL, no parity check, no strip char, |
| * no start/stop output control. */ |
| raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON); |
| /* output modes - disable post processing */ |
| raw.c_oflag &= ~(OPOST); |
| /* control modes - set 8 bit chars */ |
| raw.c_cflag |= (CS8); |
| /* local modes - choing off, canonical off, no extended functions, |
| * no signal chars (^Z,^C) */ |
| raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG); |
| /* control chars - set return condition: min number of bytes and timer. |
| * We want read to return every single byte, without timeout. */ |
| raw.c_cc[VMIN] = 1; raw.c_cc[VTIME] = 0; /* 1 byte, no timer */ |
| |
| /* put terminal in raw mode after flushing */ |
| if (tcsetattr(fd,TCSAFLUSH,&raw) < 0) goto fatal; |
| rawmode = 1; |
| return 0; |
| |
| fatal: |
| errno = ENOTTY; |
| return -1; |
| } |
| |
| static void disableRawMode(int fd) { |
| /* Don't even check the return value as it's too late. */ |
| if (rawmode && tcsetattr(fd,TCSAFLUSH,&orig_termios) != -1) |
| rawmode = 0; |
| } |
| |
| /* At exit we'll try to fix the terminal to the initial conditions. */ |
| static void linenoiseAtExit(void) { |
| disableRawMode(STDIN_FILENO); |
| freeHistory(); |
| } |
| |
| /* Try to get the number of columns in the current terminal, or assume 80 |
| * if it fails. */ |
| static int getColumns(void) { |
| struct winsize ws; |
| |
| if (ioctl(1, TIOCGWINSZ, &ws) == -1) return 80; |
| return ws.ws_col; |
| } |
| |
| /* Rewrite the currently edited line accordingly to the buffer content, |
| * cursor position, and number of columns of the terminal. */ |
| static void refreshLineRaw(int fd, const char *prompt, char *buf, size_t len, |
| size_t pos, size_t cols) |
| { |
| char seq[64]; |
| size_t plen = strlen(prompt); |
| |
| while((plen+pos) >= cols) { |
| buf++; |
| len--; |
| pos--; |
| } |
| while (plen+len > cols) { |
| len--; |
| } |
| |
| /* Cursor to left edge */ |
| snprintf(seq,64,"\x1b[0G"); |
| if (write(fd,seq,strlen(seq)) == -1) return; |
| /* Write the prompt and the current buffer content */ |
| if (write(fd,prompt,strlen(prompt)) == -1) return; |
| if (write(fd,buf,len) == -1) return; |
| /* Erase to right */ |
| snprintf(seq,64,"\x1b[0K"); |
| if (write(fd,seq,strlen(seq)) == -1) return; |
| /* Move cursor to original position. */ |
| snprintf(seq,64,"\x1b[0G\x1b[%dC", (int)(pos+plen)); |
| if (write(fd,seq,strlen(seq)) == -1) return; |
| } |
| |
| /* A wrapper for refreshLineRaw() that take a state struct instead of the |
| * single arguments. */ |
| static void refreshLine(struct linenoiseState *l) { |
| refreshLineRaw(l->fd, l->prompt, l->buf, l->len, l->pos, l->cols); |
| } |
| |
| /* Beep, used for completion when there is nothing to complete or when all |
| * the choices were already shown. */ |
| static void beep() { |
| fprintf(stderr, "\x7"); |
| fflush(stderr); |
| } |
| |
| /* Free a list of completion option populated by linenoiseAddCompletion(). */ |
| static void freeCompletions(linenoiseCompletions *lc) { |
| size_t i; |
| for (i = 0; i < lc->len; i++) |
| free(lc->cvec[i]); |
| if (lc->cvec != NULL) |
| free(lc->cvec); |
| } |
| |
| /* This is an helper function for linenoisePrompt() and is called when the |
| * user types the <tab> key in order to complete the string currently in the |
| * input. |
| * |
| * The state of the editing is encapsulated into the pointed linenoiseState |
| * structure as described in the structure definition. */ |
| static int completeLine(struct linenoiseState *ls) { |
| linenoiseCompletions lc = { 0, NULL }; |
| int nread, nwritten; |
| char c = 0; |
| |
| completionCallback(ls->buf,&lc); |
| if (lc.len == 0) { |
| beep(); |
| } else { |
| size_t stop = 0, i = 0; |
| size_t clen; |
| |
| while(!stop) { |
| /* Show completion or original buffer */ |
| if (i < lc.len) { |
| clen = strlen(lc.cvec[i]); |
| refreshLineRaw(ls->fd,ls->prompt,lc.cvec[i],clen,clen,ls->cols); |
| } else { |
| refreshLine(ls); |
| } |
| |
| nread = read(ls->fd,&c,1); |
| if (nread <= 0) { |
| freeCompletions(&lc); |
| return -1; |
| } |
| |
| switch(c) { |
| case 9: /* tab */ |
| i = (i+1) % (lc.len+1); |
| if (i == lc.len) beep(); |
| break; |
| case 27: /* escape */ |
| /* Re-show original buffer */ |
| if (i < lc.len) refreshLine(ls); |
| stop = 1; |
| break; |
| default: |
| /* Update buffer and return */ |
| if (i < lc.len) { |
| nwritten = snprintf(ls->buf,ls->buflen,"%s",lc.cvec[i]); |
| ls->len = ls->pos = nwritten; |
| } |
| stop = 1; |
| break; |
| } |
| } |
| } |
| |
| freeCompletions(&lc); |
| return c; /* Return last read character */ |
| } |
| |
| /* Clear the screen. Used to handle ctrl+l */ |
| void linenoiseClearScreen(void) { |
| if (write(STDIN_FILENO,"\x1b[H\x1b[2J",7) <= 0) { |
| /* nothing to do, just to avoid warning. */ |
| } |
| } |
| |
| /* This function is the core of the line editing capability of linenoise. |
| * It expects 'fd' to be already in "raw mode" so that every key pressed |
| * will be returned ASAP to read(). |
| * |
| * The resulting string is put into 'buf' when the user type enter, or |
| * when ctrl+d is typed. |
| * |
| * The function returns the length of the current buffer. */ |
| static int linenoisePrompt(int fd, char *buf, size_t buflen, const char *prompt) |
| { |
| struct linenoiseState l; |
| |
| /* Populate the linenoise state that we pass to functions implementing |
| * specific editing functionalities. */ |
| l.fd = fd; |
| l.buf = buf; |
| l.buflen = buflen; |
| l.prompt = prompt; |
| l.plen = strlen(prompt); |
| l.pos = 0; |
| l.len = 0; |
| l.cols = getColumns(); |
| l.history_index = 0; |
| size_t old_pos; |
| size_t diff; |
| |
| /* Buffer starts empty. */ |
| buf[0] = '\0'; |
| buflen--; /* Make sure there is always space for the nulterm */ |
| |
| /* The latest history entry is always our current buffer, that |
| * initially is just an empty string. */ |
| linenoiseHistoryAdd(""); |
| |
| if (write(fd,prompt,l.plen) == -1) return -1; |
| while(1) { |
| char c; |
| int nread; |
| char seq[2], seq2[2]; |
| |
| nread = read(fd,&c,1); |
| if (nread <= 0) return l.len; |
| |
| /* Only autocomplete when the callback is set. It returns < 0 when |
| * there was an error reading from fd. Otherwise it will return the |
| * character that should be handled next. */ |
| if (c == 9 && completionCallback != NULL) { |
| c = completeLine(&l); |
| /* Return on errors */ |
| if (c < 0) return l.len; |
| /* Read next character when 0 */ |
| if (c == 0) continue; |
| } |
| |
| switch(c) { |
| case 13: /* enter */ |
| history_len--; |
| free(history[history_len]); |
| return (int)l.len; |
| case 3: /* ctrl-c */ |
| errno = EAGAIN; |
| return -1; |
| case 127: /* backspace */ |
| case 8: /* ctrl-h */ |
| if (l.pos > 0 && l.len > 0) { |
| memmove(buf+l.pos-1,buf+l.pos,l.len - l.pos); |
| l.pos--; |
| l.len--; |
| buf[l.len] = '\0'; |
| refreshLine(&l); |
| } |
| break; |
| case 4: /* ctrl-d, remove char at right of cursor */ |
| if (l.len > 1 && l.pos < (l.len-1)) { |
| memmove(buf+l.pos,buf+l.pos+1,l.len - l.pos); |
| l.len--; |
| buf[l.len] = '\0'; |
| refreshLine(&l); |
| } else if (l.len == 0) { |
| history_len--; |
| free(history[history_len]); |
| return -1; |
| } |
| break; |
| case 20: /* ctrl-t */ |
| if (l.pos > 0 && l.pos < l.len) { |
| int aux = buf[l.pos-1]; |
| buf[l.pos-1] = buf[l.pos]; |
| buf[l.pos] = aux; |
| if (l.pos != l.len-1) l.pos++; |
| refreshLine(&l); |
| } |
| break; |
| case 2: /* ctrl-b */ |
| goto left_arrow; |
| case 6: /* ctrl-f */ |
| goto right_arrow; |
| case 16: /* ctrl-p */ |
| seq[1] = 65; |
| goto up_down_arrow; |
| case 14: /* ctrl-n */ |
| seq[1] = 66; |
| goto up_down_arrow; |
| break; |
| case 27: /* escape sequence */ |
| if (read(fd,seq,2) == -1) break; |
| if (seq[0] == 91 && seq[1] == 68) { |
| left_arrow: |
| /* left arrow */ |
| if (l.pos > 0) { |
| l.pos--; |
| refreshLine(&l); |
| } |
| } else if (seq[0] == 91 && seq[1] == 67) { |
| right_arrow: |
| /* right arrow */ |
| if (l.pos != l.len) { |
| l.pos++; |
| refreshLine(&l); |
| } |
| } else if (seq[0] == 91 && (seq[1] == 65 || seq[1] == 66)) { |
| up_down_arrow: |
| /* up and down arrow: history */ |
| if (history_len > 1) { |
| /* Update the current history entry before to |
| * overwrite it with tne next one. */ |
| free(history[history_len-1-l.history_index]); |
| history[history_len-1-l.history_index] = strdup(buf); |
| /* Show the new entry */ |
| l.history_index += (seq[1] == 65) ? 1 : -1; |
| if (l.history_index < 0) { |
| l.history_index = 0; |
| break; |
| } else if (l.history_index >= history_len) { |
| l.history_index = history_len-1; |
| break; |
| } |
| strncpy(buf,history[history_len-1-l.history_index],buflen); |
| buf[buflen] = '\0'; |
| l.len = l.pos = strlen(buf); |
| refreshLine(&l); |
| } |
| } else if (seq[0] == 91 && seq[1] > 48 && seq[1] < 55) { |
| /* extended escape */ |
| if (read(fd,seq2,2) == -1) break; |
| if (seq[1] == 51 && seq2[0] == 126) { |
| /* delete */ |
| if (l.len > 0 && l.pos < l.len) { |
| memmove(buf+l.pos,buf+l.pos+1,l.len-l.pos-1); |
| l.len--; |
| buf[l.len] = '\0'; |
| refreshLine(&l); |
| } |
| } |
| } |
| break; |
| default: |
| if (l.len < buflen) { |
| if (l.len == l.pos) { |
| buf[l.pos] = c; |
| l.pos++; |
| l.len++; |
| buf[l.len] = '\0'; |
| if (l.plen+l.len < l.cols) { |
| /* Avoid a full update of the line in the |
| * trivial case. */ |
| if (write(fd,&c,1) == -1) return -1; |
| } else { |
| refreshLine(&l); |
| } |
| } else { |
| memmove(buf+l.pos+1,buf+l.pos,l.len-l.pos); |
| buf[l.pos] = c; |
| l.len++; |
| l.pos++; |
| buf[l.len] = '\0'; |
| refreshLine(&l); |
| } |
| } |
| break; |
| case 21: /* Ctrl+u, delete the whole line. */ |
| buf[0] = '\0'; |
| l.pos = l.len = 0; |
| refreshLine(&l); |
| break; |
| case 11: /* Ctrl+k, delete from current to end of line. */ |
| buf[l.pos] = '\0'; |
| l.len = l.pos; |
| refreshLine(&l); |
| break; |
| case 1: /* Ctrl+a, go to the start of the line */ |
| l.pos = 0; |
| refreshLine(&l); |
| break; |
| case 5: /* ctrl+e, go to the end of the line */ |
| l.pos = l.len; |
| refreshLine(&l); |
| break; |
| case 12: /* ctrl+l, clear screen */ |
| linenoiseClearScreen(); |
| refreshLine(&l); |
| break; |
| case 23: /* ctrl+w, delete previous word */ |
| old_pos = l.pos; |
| while (l.pos > 0 && buf[l.pos-1] == ' ') |
| l.pos--; |
| while (l.pos > 0 && buf[l.pos-1] != ' ') |
| l.pos--; |
| diff = old_pos - l.pos; |
| memmove(&buf[l.pos], &buf[old_pos], l.len-old_pos+1); |
| l.len -= diff; |
| refreshLine(&l); |
| break; |
| } |
| } |
| return l.len; |
| } |
| |
| /* This function calls the line editing function linenoisePrompt() using |
| * the STDIN file descriptor set in raw mode. */ |
| static int linenoiseRaw(char *buf, size_t buflen, const char *prompt) { |
| int fd = STDIN_FILENO; |
| int count; |
| |
| if (buflen == 0) { |
| errno = EINVAL; |
| return -1; |
| } |
| if (!isatty(STDIN_FILENO)) { |
| if (fgets(buf, buflen, stdin) == NULL) return -1; |
| count = strlen(buf); |
| if (count && buf[count-1] == '\n') { |
| count--; |
| buf[count] = '\0'; |
| } |
| } else { |
| if (enableRawMode(fd) == -1) return -1; |
| count = linenoisePrompt(fd, buf, buflen, prompt); |
| disableRawMode(fd); |
| printf("\n"); |
| } |
| return count; |
| } |
| |
| /* The high level function that is the main API of the linenoise library. |
| * This function checks if the terminal has basic capabilities, just checking |
| * for a blacklist of stupid terminals, and later either calls the line |
| * editing function or uses dummy fgets() so that you will be able to type |
| * something even in the most desperate of the conditions. */ |
| char *linenoise(const char *prompt) { |
| char buf[LINENOISE_MAX_LINE]; |
| int count; |
| |
| if (isUnsupportedTerm()) { |
| size_t len; |
| |
| printf("%s",prompt); |
| fflush(stdout); |
| if (fgets(buf,LINENOISE_MAX_LINE,stdin) == NULL) return NULL; |
| len = strlen(buf); |
| while(len && (buf[len-1] == '\n' || buf[len-1] == '\r')) { |
| len--; |
| buf[len] = '\0'; |
| } |
| return strdup(buf); |
| } else { |
| count = linenoiseRaw(buf,LINENOISE_MAX_LINE,prompt); |
| if (count == -1) return NULL; |
| return strdup(buf); |
| } |
| } |
| |
| /* Register a callback function to be called for tab-completion. */ |
| void linenoiseSetCompletionCallback(linenoiseCompletionCallback *fn) { |
| completionCallback = fn; |
| } |
| |
| /* This function is used by the callback function registered by the user |
| * in order to add completion options given the input string when the |
| * user typed <tab>. See the example.c source code for a very easy to |
| * understand example. */ |
| void linenoiseAddCompletion(linenoiseCompletions *lc, char *str) { |
| size_t len = strlen(str); |
| char *copy = malloc(len+1); |
| memcpy(copy,str,len+1); |
| lc->cvec = realloc(lc->cvec,sizeof(char*)*(lc->len+1)); |
| lc->cvec[lc->len++] = copy; |
| } |
| |
| /* Using a circular buffer is smarter, but a bit more complex to handle. */ |
| int linenoiseHistoryAdd(const char *line) { |
| char *linecopy; |
| |
| if (history_max_len == 0) return 0; |
| if (history == NULL) { |
| history = malloc(sizeof(char*)*history_max_len); |
| if (history == NULL) return 0; |
| memset(history,0,(sizeof(char*)*history_max_len)); |
| } |
| linecopy = strdup(line); |
| if (!linecopy) return 0; |
| if (history_len == history_max_len) { |
| free(history[0]); |
| memmove(history,history+1,sizeof(char*)*(history_max_len-1)); |
| history_len--; |
| } |
| history[history_len] = linecopy; |
| history_len++; |
| return 1; |
| } |
| |
| /* Set the maximum length for the history. This function can be called even |
| * if there is already some history, the function will make sure to retain |
| * just the latest 'len' elements if the new history length value is smaller |
| * than the amount of items already inside the history. */ |
| int linenoiseHistorySetMaxLen(int len) { |
| char **new; |
| |
| if (len < 1) return 0; |
| if (history) { |
| int tocopy = history_len; |
| |
| new = malloc(sizeof(char*)*len); |
| if (new == NULL) return 0; |
| if (len < tocopy) tocopy = len; |
| memcpy(new,history+(history_max_len-tocopy), sizeof(char*)*tocopy); |
| free(history); |
| history = new; |
| } |
| history_max_len = len; |
| if (history_len > history_max_len) |
| history_len = history_max_len; |
| return 1; |
| } |
| |
| /* Save the history in the specified file. On success 0 is returned |
| * otherwise -1 is returned. */ |
| int linenoiseHistorySave(char *filename) { |
| FILE *fp = fopen(filename,"w"); |
| int j; |
| |
| if (fp == NULL) return -1; |
| for (j = 0; j < history_len; j++) |
| fprintf(fp,"%s\n",history[j]); |
| fclose(fp); |
| return 0; |
| } |
| |
| /* Load the history from the specified file. If the file does not exist |
| * zero is returned and no operation is performed. |
| * |
| * If the file exists and the operation succeeded 0 is returned, otherwise |
| * on error -1 is returned. */ |
| int linenoiseHistoryLoad(char *filename) { |
| FILE *fp = fopen(filename,"r"); |
| char buf[LINENOISE_MAX_LINE]; |
| |
| if (fp == NULL) return -1; |
| |
| while (fgets(buf,LINENOISE_MAX_LINE,fp) != NULL) { |
| char *p; |
| |
| p = strchr(buf,'\r'); |
| if (!p) p = strchr(buf,'\n'); |
| if (p) *p = '\0'; |
| linenoiseHistoryAdd(buf); |
| } |
| fclose(fp); |
| return 0; |
| } |
