editline_compat.c File Reference

#include "asterisk.h"
#include <histedit.h>
#include "editline_compat.h"

Include dependency graph for editline_compat.c:

Go to the source code of this file.

Functions
int	editline_read_char (EditLine *el, wchar_t *cp)
static int	read_char (EditLine *el, wchar_t *cp)

Function Documentation

editline_read_char()

int editline_read_char	(	EditLine *	el,
		wchar_t *	cp
	)

Definition at line 168 of file editline_compat.c.

{
    return read_char(el, cp);
}

References el, and read_char().

Referenced by ast_el_read_char().

read_char()

static int read_char ( EditLine *  el, wchar_t *  cp  )

static

Definition at line 71 of file editline_compat.c.

{
    ssize_t num_read;
#ifdef EDITLINE_ORIG
    /* Removed for Asterisk. FIXIO is set when the EL_SAFEREAD
       flag is set on the EditLine handle, which we do not do
       so `tried` will always be 1 */
    int tried = (el->el_flags & FIXIO) == 0;
#endif
    char cbuf[MB_LEN_MAX];
    size_t cbp = 0;
#ifdef EDITLINE_ORIG
    /* Removed for Asterisk. This is only needed for FIXIO,
       as above. */
    int save_errno = errno;
#endif
 
 again:
#ifdef EDITLINE_ORIG
    /* Removed for Asterisk. libedit only sets up signal handlers
       for SIGCONT and SIGWINCH if the EL_SIGNAL flag is set on
       the EditLine handle, which we do not do.
 
       Additionally, we don't have access to the internals of `el`
       to get the file descriptor to read from, but we know that
       we will always be reading from stdin, so hardcode it */
    el->el_signal->sig_no = 0;
    while ((num_read = read(el->el_infd, cbuf + cbp, (size_t)1)) == -1) {
        int e = errno;
        switch (el->el_signal->sig_no) {
        case SIGCONT:
            el_wset(el, EL_REFRESH);
            /*FALLTHROUGH*/
        case SIGWINCH:
            sig_set(el);
            goto again;
        default:
            break;
        }
        if (!tried && read__fixio(el->el_infd, e) == 0) {
            errno = save_errno;
            tried = 1;
        } else {
            errno = e;
            *cp = L'\0';
            return -1;
        }
    }
#else
    while ((num_read = read(STDIN_FILENO, cbuf + cbp, (size_t)1)) == -1) {
        *cp = L'\0';
        return -1;
    }
#endif
 
    /* Test for EOF */
    if (num_read == 0) {
        *cp = L'\0';
        return 0;
    }
 
    for (;;) {
        mbstate_t mbs;
 
        ++cbp;
        /* This only works because UTF8 is stateless. */
        memset(&mbs, 0, sizeof(mbs));
        switch (mbrtowc(cp, cbuf, cbp, &mbs)) {
        case (size_t)-1:
            if (cbp > 1) {
                /*
                 * Invalid sequence, discard all bytes
                 * except the last one.
                 */
                cbuf[0] = cbuf[cbp - 1];
                cbp = 0;
                break;
            } else {
                /* Invalid byte, discard it. */
                cbp = 0;
                goto again;
            }
        case (size_t)-2:
            if (cbp >= MB_LEN_MAX) {
                errno = EILSEQ;
                *cp = L'\0';
                return -1;
            }
            /* Incomplete sequence, read another byte. */
            goto again;
        default:
            /* Valid character, process it. */
            return 1;
        }
    }
}

References el, and errno.

Referenced by editline_read_char().