+++ /dev/null
-\r
-\r
-/* pd_readline2.c */ \r
-/* Status (as at 26th Aug 2012) : useful progress. */ \r
-/* Keystroke sequences (along with the special flags */ \r
-/* like Esc, Ctrl, Alt etc are now stored in a buffer */ \r
-/* ( an array of structs ). */ \r
-\r
-/* The code can now distinguish between a printable key */ \r
-/* and a key that should not be printed. */ \r
-\r
-/* Backspace key, and left and right arrow keys now work. */ \r
-\r
-/* It will still be some time before this is a REAL */ \r
-/* readline, but we are "on the way"...... */ \r
-/* This code is released to the public domain. */ \r
-/* "Share and enjoy...." ;) */ \r
-\r
-\r
-#include <string.h> \r
-#include <stdio.h> \r
-#include <termios.h> /* For getch() */ \r
-\r
-/* This implementation of getch() is from here - */ \r
-/* http://wesley.vidiqatch.org/ */ \r
-/* Thanks, Wesley! */ \r
-static struct termios old, new;\r
-\r
-/* Initialize new terminal i/o settings */\r
-void initTermios(int echo) {\r
- tcgetattr(0, &old); /* grab old terminal i/o settings */\r
- new = old; /* make new settings same as old settings */\r
- new.c_lflag &= ~ICANON; /* disable buffered i/o */\r
- new.c_lflag &= echo ? ECHO : ~ECHO; /* set echo mode */\r
- tcsetattr(0, TCSANOW, &new); /* use these new terminal i/o settings now */\r
-}\r
-\r
-\r
-/* Restore old terminal i/o settings */\r
-void resetTermios(void) {\r
- tcsetattr(0, TCSANOW, &old);\r
-}\r
-\r
-\r
-/* Read 1 character - echo defines echo mode */\r
-char getch_(int echo) {\r
- char ch;\r
- initTermios(echo);\r
- ch = getchar();\r
- resetTermios();\r
- return ch;\r
-}\r
-\r
-\r
-/* Read 1 character without echo */\r
-char getch(void) {\r
- return getch_(0);\r
-}\r
-\r
-\r
-/* Read 1 character with echo */\r
-char getche(void) {\r
- return getch_(1);\r
-} \r
-\r
-\r
-\r
-/* Helper function, to let us see if a .history file */ \r
-/* exists in the current directory. */ \r
-int fexists(char *fname)\r
-{ \r
-\r
- FILE *fptr ; \r
- \r
- fptr = fopen(fname, "r") ; \r
- \r
- if ( !fptr ) return -1 ; /* File does not exist in dir. */ \r
- \r
- fclose(fptr); \r
- return 0; /* File DOES exist in dir. */ \r
-\r
-} \r
-\r
-\r
-/* Helper function to print escape sequences to terminal */ \r
-void prtseq(char *what) \r
-{ \r
- if (strcmp(what, "left") ) printf("\033[1D"); \r
- else if (strcmp(what, "right") ) printf("\033[1C"); \r
- else if (strcmp(what, "bs") ) \r
- printf("\033[1D");\r
- printf("\040"); \r
- printf("\033[1D"); \r
-} \r
-\r
-\r
-\r
-\r
- /* Struct to store key sequences */ \r
-typedef struct { \r
- int fnkey; \r
- int ctrl; \r
- int alt ; \r
- int shf ; \r
- int esc ; \r
- int lbr ; /* For left-bracket ([) of escape sequences */ \r
- int key; \r
- } keyseq ; \r
-\r
-\r
-\r
-\r
-\r
-int main(void)\r
-{\r
- \r
- printf("Public Domain Readline \n"); \r
- \r
- /* Buffer - an array of keyseq structs. */ \r
- /* Note - now that we store the keystrokes in here, */ \r
- /* we can look at the various flags and decide whether to */ \r
- /* "echo" the key (as normal) or suppress it (as with an */ \r
- /* arrow key). */ \r
- keyseq buffer[80] ; \r
- \r
- /* Buffer "pointer" */ \r
- int bufpnt = 0; \r
- \r
- \r
- /* Test for existence of history file. */ \r
- int exists; \r
- exists = fexists(".history"); \r
- printf("Result: %d \n", exists); \r
- \r
- while(1) \r
- { \r
- \r
- int key = getch(); \r
- \r
- /* Printable chars. */ \r
- if ( (key >= 32) && (key <= 126) ) \r
- { \r
- /* We have a printable key so print it. */ \r
- putchar(key); \r
- buffer[bufpnt].key = key; \r
- bufpnt += 1; \r
- } \r
- \r
- /* Up arrow is 27, 91, 65. ( ESC [ A ) */ \r
- /* Down arrow is 27, 91, 66. ( ESC [ B ) */ \r
- /* Right arrow is 27, 91, 67. ( ESC [ C ) */ \r
- /* Left arrow is 27, 91, 68. ( ESC [ D ) */ \r
- /* Function keys. */ \r
- /* F2 is 27, 79, 81. */ \r
- /* F3 is 27, 79, 82. */ \r
- /* F4 is 27, 79, 83. */ \r
- \r
- /* Backspace */ \r
- else if(key == 127) \r
- { \r
- buffer[bufpnt].key = key; \r
- /* Move 1 char to left */ \r
- prtseq("bs"); \r
- bufpnt += 1; \r
- } \r
- \r
- else if(key == 27) \r
- { \r
- buffer[bufpnt].esc = 1; \r
- key = getch(); \r
- if(key == 91) \r
- buffer[bufpnt].lbr = 1; \r
- key = getch(); \r
- if(key == 65) /* Up arrow */ \r
- { \r
- buffer[bufpnt].key = key; \r
- } \r
- if(key == 66) /* Down arrow */ \r
- { \r
- buffer[bufpnt].key = key; \r
- } \r
- if(key == 67) /* Left arrow */ \r
- { \r
- buffer[bufpnt].key = key; \r
- prtseq("left"); \r
- }\r
- if(key == 68) /* Right arrow */ \r
- { \r
- buffer[bufpnt].key = key; \r
- prtseq("right"); \r
- }\r
- \r
- bufpnt += 1; \r
- } \r
- \r
- \r
- \r
- /* The Enter key exits. Enter is 10 decimal */ \r
- else if(key == 10) \r
- { \r
- puts("\n"); \r
- int j ; \r
- /* Print the array of structs. */ \r
- for (j=0; j<bufpnt; j++) \r
- { \r
- printf("Fnkey: %d ", buffer[j].fnkey ) ; \r
- printf("Ctrl: %d ", buffer[j].ctrl ) ; \r
- printf("Alt: %d ", buffer[j].alt ) ; \r
- printf("Shf: %d ", buffer[j].shf ) ; \r
- printf("Esc: %d ", buffer[j].esc ) ; \r
- printf("Lbr: %d ", buffer[j].lbr ) ; \r
- printf("Key: %d \n", buffer[j].key ) ; \r
- } \r
- \r
- break; \r
- } /* Key = Enter */ \r
- } \r
- \r
- return 0;\r
-} \r
-\r
-\r
-\r
-\r
projects / pd_readline / blobdiff