forked from OctaForge/libcubescript
58 lines
1.4 KiB
C++
58 lines
1.4 KiB
C++
#ifdef CS_REPL_USE_LIBEDIT
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#ifndef CS_REPL_HAS_EDIT
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#define CS_REPL_HAS_EDIT
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/* use the NetBSD libedit library */
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#include <ostd/string.hh>
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#include <ostd/maybe.hh>
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#include <histedit.h>
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static EditLine *els = nullptr;
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static History *elh = nullptr;
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static char *el_prompt(EditLine *el) {
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void *prompt = nullptr;
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el_get(el, EL_CLIENTDATA, &prompt);
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if (!prompt) {
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return const_cast<char *>("");
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}
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return const_cast<char *>(static_cast<CsSvar *>(prompt)->get_value().data());
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}
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static void init_lineedit(ostd::ConstCharRange progname) {
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els = el_init(progname.data(), stdin, stdout, stderr);
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elh = history_init();
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/* init history with reasonable size */
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HistEvent ev;
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history(elh, &ev, H_SETSIZE, 1000);
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el_set(els, EL_HIST, history, elh);
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el_set(els, EL_PROMPT, el_prompt);
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}
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static ostd::Maybe<ostd::String> read_line(CsSvar *pr) {
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int count;
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el_set(els, EL_CLIENTDATA, static_cast<void *>(pr));
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auto line = el_gets(els, &count);
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if (count > 0) {
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ostd::String ret = line;
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/* libedit keeps the trailing \n */
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ret.resize(ret.size() - 1);
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return ostd::move(ret);
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} else if (!count) {
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return ostd::String();
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}
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return ostd::nothing;
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}
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static void add_history(ostd::ConstCharRange line) {
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HistEvent ev;
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/* backed by ostd::String so it's terminated */
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history(elh, &ev, H_ENTER, line.data());
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}
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#endif
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#endif
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