_glh_search_prefix
if(_glh_search_prefix(gl->glh, gl->line, 0)) {
if(_glh_search_prefix(gl->glh, gl->line, 0)) {
_glh_search_prefix(gl->glh, gl->line, gl->buff_curpos +
_glh_search_prefix(gl->glh, gl->line, gl->buff_curpos +
int _glh_search_prefix(GlHistory *glh, const char *line, int prefix_len);