support for delete key, thanks to jgriffiths (on github)

diff --git a/linenoise.c b/linenoise.c
index b7c6b73226098e58758548d37f06058c53800e01..045862e7881b7f4c0026f94c86a88a1368428490 100644 (file)
--- a/linenoise.c
+++ b/linenoise.c
@@ -213,7 +213,7 @@ static int linenoisePrompt(int fd, char *buf, size_t buflen, const char *prompt)
     while(1) {
         char c;
         int nread;
-        char seq[2];
+        char seq[2], seq2[2];
 
         nread = read(fd,&c,1);
         if (nread <= 0) return len;
@@ -294,6 +294,18 @@ up_down_arrow:
                     len = pos = strlen(buf);
                     refreshLine(fd,prompt,buf,len,pos,cols);
                 }
+            } 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 (len > 0 && pos < len) {
+                        memmove(buf+pos,buf+pos+1,len-pos-1);
+                        len--;
+                        buf[len] = '\0';
+                        refreshLine(fd,prompt,buf,len,pos,cols);
+                    }
+                }
             }
             break;
         default: