* Ignore ANSI escape sequences for moving cursor, which are generated by keyboard
Signed-off-by: Pali Rohár pali.rohar@gmail.com --- common/main.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 49 insertions(+), 0 deletions(-)
diff --git a/common/main.c b/common/main.c index e96c95a..5531130 100644 --- a/common/main.c +++ b/common/main.c @@ -958,6 +958,7 @@ int readline_into_buffer (const char *const prompt, char * buffer) int n = 0; /* buffer index */ int plen = 0; /* prompt length */ int col; /* output column cnt */ + int esc = 0; /* ansi escape char */ char c;
/* print prompt */ @@ -1024,7 +1025,55 @@ int readline_into_buffer (const char *const prompt, char * buffer) p=delete_char(p_buf, p, &col, &n, plen); continue;
+ case '\e': /* ANSI escape char */ + esc = 1; + continue; + default: + + /* + * Check for ANSI escape chars + */ + if (esc == 0 && c == '\e') { + esc = 1; + continue; + } else if (esc == 1) { + if (c == '[') { + esc = 2; + continue; + } + if (n < CONFIG_SYS_CBSIZE-2) { + ++n; + *p++ = '\e'; + putc('\e'); + } + esc = 0; + } else if (esc == 2 || esc == 3) { + if (esc == 2 && c == '1') { + esc = 3; + continue; + } + /* Ignore ANSI escape sequences generated by keyboard */ + /* \e [ 1 A-D and \e [ A-D */ + if ( c >= 'A' && c <= 'D' ) { + esc = 0; + continue; + } + if (esc == 2 && n < CONFIG_SYS_CBSIZE-3) { + n += 2; + *p++ = '\e'; + *p++ = '['; + puts("\e["); + } else if (esc == 3 && n < CONFIG_SYS_CBSIZE-4) { + n += 3; + *p++ = '\e'; + *p++ = '['; + *p++ = '1'; + puts("\e[1"); + } + esc = 0; + } + /* * Must be a normal character then */