diff options
Diffstat (limited to 'src/nvim/lua/executor.c')
| -rw-r--r-- | src/nvim/lua/executor.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/src/nvim/lua/executor.c b/src/nvim/lua/executor.c index 9e0063ebaa..9167ec5e54 100644 --- a/src/nvim/lua/executor.c +++ b/src/nvim/lua/executor.c @@ -11,6 +11,7 @@ #include "nvim/func_attr.h" #include "nvim/api/private/defs.h" #include "nvim/api/private/helpers.h" +#include "nvim/api/private/handle.h" #include "nvim/api/vim.h" #include "nvim/msgpack_rpc/channel.h" #include "nvim/vim.h" @@ -19,6 +20,7 @@ #include "nvim/message.h" #include "nvim/memline.h" #include "nvim/buffer_defs.h" +#include "nvim/regexp.h" #include "nvim/macros.h" #include "nvim/screen.h" #include "nvim/cursor.h" @@ -244,6 +246,14 @@ static int nlua_schedule(lua_State *const lstate) return 0; } +static struct luaL_Reg regex_meta[] = { + { "__gc", regex_gc }, + { "__tostring", regex_tostring }, + { "match_str", regex_match_str }, + { "match_line", regex_match_line }, + { NULL, NULL } +}; + /// Initialize lua interpreter state /// /// Called by lua interpreter itself to initialize state. @@ -291,6 +301,15 @@ static int nlua_state_init(lua_State *const lstate) FUNC_ATTR_NONNULL_ALL // call lua_pushcfunction(lstate, &nlua_call); lua_setfield(lstate, -2, "call"); + // regex + lua_pushcfunction(lstate, &nlua_regex); + lua_setfield(lstate, -2, "regex"); + + luaL_newmetatable(lstate, "nvim_regex"); + luaL_register(lstate, NULL, regex_meta); + lua_pushvalue(lstate, -1); // [meta, meta] + lua_setfield(lstate, -2, "__index"); // [meta] + lua_pop(lstate, 1); // don't use metatable now // rpcrequest lua_pushcfunction(lstate, &nlua_rpcrequest); @@ -1037,3 +1056,136 @@ static void nlua_add_treesitter(lua_State *const lstate) FUNC_ATTR_NONNULL_ALL lua_pushcfunction(lstate, ts_lua_parse_query); lua_setfield(lstate, -2, "_ts_parse_query"); } + +static int nlua_regex(lua_State *lstate) +{ + Error err = ERROR_INIT; + const char *text = luaL_checkstring(lstate, 1); + regprog_T *prog = NULL; + + TRY_WRAP({ + try_start(); + prog = vim_regcomp((char_u *)text, RE_AUTO | RE_MAGIC | RE_STRICT); + try_end(&err); + }); + + if (ERROR_SET(&err)) { + return luaL_error(lstate, "couldn't parse regex: %s", err.msg); + } + assert(prog); + + regprog_T **p = lua_newuserdata(lstate, sizeof(regprog_T *)); + *p = prog; + + lua_getfield(lstate, LUA_REGISTRYINDEX, "nvim_regex"); // [udata, meta] + lua_setmetatable(lstate, -2); // [udata] + return 1; +} + +static regprog_T **regex_check(lua_State *L) +{ + return luaL_checkudata(L, 1, "nvim_regex"); +} + + +static int regex_gc(lua_State *lstate) +{ + regprog_T **prog = regex_check(lstate); + vim_regfree(*prog); + return 0; +} + +static int regex_tostring(lua_State *lstate) +{ + lua_pushstring(lstate, "<regex>"); + return 1; +} + +static int regex_match(lua_State *lstate, regprog_T **prog, char_u *str) +{ + regmatch_T rm; + rm.regprog = *prog; + rm.rm_ic = false; + bool match = vim_regexec(&rm, str, 0); + *prog = rm.regprog; + + if (match) { + lua_pushinteger(lstate, (lua_Integer)(rm.startp[0]-str)); + lua_pushinteger(lstate, (lua_Integer)(rm.endp[0]-str)); + return 2; + } + return 0; +} + +static int regex_match_str(lua_State *lstate) +{ + regprog_T **prog = regex_check(lstate); + const char *str = luaL_checkstring(lstate, 2); + int nret = regex_match(lstate, prog, (char_u *)str); + + if (!*prog) { + return luaL_error(lstate, "regex: internal error"); + } + + return nret; +} + +static int regex_match_line(lua_State *lstate) +{ + regprog_T **prog = regex_check(lstate); + + int narg = lua_gettop(lstate); + if (narg < 3) { + return luaL_error(lstate, "not enough args"); + } + + long bufnr = luaL_checkinteger(lstate, 2); + long rownr = luaL_checkinteger(lstate, 3); + long start = 0, end = -1; + if (narg >= 4) { + start = luaL_checkinteger(lstate, 4); + } + if (narg >= 5) { + end = luaL_checkinteger(lstate, 5); + if (end < 0) { + return luaL_error(lstate, "invalid end"); + } + } + + buf_T *buf = bufnr ? handle_get_buffer((int)bufnr) : curbuf; + if (!buf || buf->b_ml.ml_mfp == NULL) { + return luaL_error(lstate, "invalid buffer"); + } + + if (rownr >= buf->b_ml.ml_line_count) { + return luaL_error(lstate, "invalid row"); + } + + char_u *line = ml_get_buf(buf, rownr+1, false); + size_t len = STRLEN(line); + + if (start < 0 || (size_t)start > len) { + return luaL_error(lstate, "invalid start"); + } + + char_u save = NUL; + if (end >= 0) { + if ((size_t)end > len || end < start) { + return luaL_error(lstate, "invalid end"); + } + save = line[end]; + line[end] = NUL; + } + + int nret = regex_match(lstate, prog, line+start); + + if (end >= 0) { + line[end] = save; + } + + if (!*prog) { + return luaL_error(lstate, "regex: internal error"); + } + + return nret; +} |