/* up-arrow key. */
/* This code is released to the public domain. */
/* "Share and enjoy...." ;) */
+/* See the UNLICENSE file for details. */
-
-
-#include <string.h>
-#include <stdio.h>
-#include <termios.h>
-
-/* This implementation of getch() is from here - */
-/* http://wesley.vidiqatch.org/ */
-/* Thanks, Wesley! */
-static struct termios old, new;
-
-/* Initialize new terminal i/o settings */
-void initTermios(int echo) {
- tcgetattr(0, &old); /* grab old terminal i/o settings */
- new = old; /* make new settings same as old settings */
- new.c_lflag &= ~ICANON; /* disable buffered i/o */
- new.c_lflag &= echo ? ECHO : ~ECHO; /* set echo mode */
- tcsetattr(0, TCSANOW, &new); /* use these new terminal i/o settings now */
-}
-
-
-/* Restore old terminal i/o settings */
-void resetTermios(void) {
- tcsetattr(0, TCSANOW, &old);
-}
-
-
-/* Read 1 character - echo defines echo mode */
-char getch_(int echo) {
- char ch;
- initTermios(echo);
- ch = getchar();
- resetTermios();
- return ch;
-}
-
-
-/* Read 1 character without echo */
-char getch(void) {
- return getch_(0);
-}
-
-
-/* Read 1 character with echo */
-char getche(void) {
- return getch_(1);
-}
-
-
-
-/* Helper function, to let us see if a file */
-/* exists in the current directory. */
-int fexists(char *fname)
-{
- FILE *fptr;
- fptr = fopen(fname, "r") ;
- if ( !fptr ) return -1 ; /* File does not exist in dir. */
- fclose(fptr);
- return 0; /* File DOES exist in dir. */
-}
-
-
-/* Helper function to chop newlines off the lines read in. */
-/* Without this being done, an extra newline is inserted */
-/* (which is usually not what is wanted). */
-char *chop(char *s)
-{
- s[strcspn(s,"\n")] = '\0';
- return s;
-}
-
-
-/* An array to store the command-history file in. */
-/* Only 20 lines are read. */
-char hist[20][80];
-
-
-/* Read the file into the array of strings. */
-void readfile(char *fname)
-{
- int retval = fexists(fname);
-
- int i;
- if (retval == 0) {
- /* File exists, so open it. */
- /* We open it in read-write mode so we can */
- /* append new commands to it. */
- FILE *fptr;
- fptr = fopen(fname, "rw");
-
- for(i=0; i<20; i++)
- {
- chop(fgets(hist[i], 80, fptr) );
- }
-
- } /* retval == 0 */
-
- else puts("Error! File does not exist. \n");
-
-}
-
-
-/* Helper function to print the command-history file. */
-void printfile(void)
-{
- int j;
-
- for(j=0; j<20; j++)
- {
- puts(hist[j]);
- }
-}
-
-
-
-
-/* Helper function. Print a previous command-line WITHOUT */
-/* a newline. */
-void putline(char *str)
-{
- char *line = chop(str);
- printf("%s", line);
-}
+/* TO DO - */
+/* a) Add support for Home and End (of line) keys. */
+/* b) Add support for function keys. */
+/* c) Add support for Insert key so that text can be */
+/* inserted. */
+/* d) Put much of the code into a header file. */
+/* e) Change so that pressing Enter adds the current */
+/* line of commands to the command-history. */
+/* ( May look at using Ctrl-D to exit, as Python */
+/* does with its command-line. ) */
+/* f) Add support for copying and pasting text via */
+/* Ctrl-C and Ctrl-V. */
+#include "pd_readline.h"
int main(void)
{
-
-/* Our "command-history" file. */
-readfile("test.txt");
-
-/* Main buffer for the command-line. */
-char buffer[80];
-
-/* Main buffer "pointer" */
-int bufpnt = 0;
-
-/* "Pointer" for the history file. */
-int histpnt = 20;
-
+
+ /* Create a buffer for the text. */
+ buf mybuf;
+
+
+ /* Read in the command history file. */
+ readhistory("test.txt");
+
while(1)
- {
-
- int key = getch();
- buffer[bufpnt] = key;
- bufpnt += 1;
+ {
- /* Printable chars. */
- if ( (key >= 32) && (key <= 126) )
- {
- /* We have a printable key so print it. */
- putchar(key);
- bufpnt += 1;
- }
-
- /* Up arrow is 27, 91, 65. ( ESC [ A ) */
- /* Down arrow is 27, 91, 66. ( ESC [ B ) */
- /* Right arrow is 27, 91, 67. ( ESC [ C ) */
- /* Left arrow is 27, 91, 68. ( ESC [ D ) */
- /* Function keys. */
- /* F2 is 27, 79, 81. */
- /* F3 is 27, 79, 82. */
- /* F4 is 27, 79, 83. */
-
- /* Backspace */
- else if(key == 127)
- {
- /* Move left 1 char and delete that char */
- bufpnt -= 1;
- printf("\033[1D");
- printf("\040");
- printf("\033[1D");
- /* Move 1 char to left again */
- bufpnt -= 1;
- }
+ keyhandler(mybuf);
- /* We have an escape key-sequence */
- else if(key == 27)
- {
- key = getch();
- if(key == 91)
- key = getch();
-
- if (key == 65) /* Up Arrow */
- {
- /* Move one command "back" in history. */
- histpnt -= 1;
- /* Clear to end of line. */
- printf("\033[80D");
- printf("\033[K");
- /* Move buffer pointer to start of line */
- bufpnt = 0;
- /* Clear the array. */
- memset(buffer, 0, sizeof(char)*80);
- /* Print the pointed-at command-sequence. */
- putline(hist[histpnt]);
- }
-
- if(key == 66) /* Down Arrow */
- {
- /* Move one command "forward" in history. */
- histpnt += 1;
- /* Clear to end of line. */
- printf("\033[80D");
- printf("\033[K");
- /* Move buffer pointer to start of line */
- bufpnt = 0;
- /* Clear the array. */
- memset(buffer, 0, sizeof(char)*80);
- /* Print the pointed-at command-sequence. */
- putline(hist[histpnt]);
- }
-
- if(key == 67) /* Left arrow */
- {
- /* Move one character to the left. */
- printf("\033[1C");
- }
-
- if(key == 68) /* Right arrow */
- {
- /* Move one character to the right. */
- printf("\033[1D");
- }
-
- } /* End of key=27 key sequence. */
-
-
- /* The Enter key exits. Enter is 10 decimal */
- else if(key == 10)
- {
- puts("\n");
- puts("Exiting... \n");
- break;
- } /* Key = Enter */
- }
+ }
- return 0;
-
+ return 0;
+
}
projects / pd_readline / blobdiff