From 6ab5eb347bb437c4aed82e329e65244c63566530 Mon Sep 17 00:00:00 2001 From: ZyX Date: Mon, 25 Dec 2017 01:08:58 +0300 Subject: [PATCH] eval: Remove magic numbers from find_some_match() type argument --- src/nvim/eval.c | 155 +++++++++++++++++++++++++++++------------------- 1 file changed, 93 insertions(+), 62 deletions(-) diff --git a/src/nvim/eval.c b/src/nvim/eval.c index c878f0481d..d0f8ced18b 100644 --- a/src/nvim/eval.c +++ b/src/nvim/eval.c @@ -215,6 +215,15 @@ static garray_T ga_scripts = {0, 0, sizeof(scriptvar_T *), 4, NULL}; static int echo_attr = 0; /* attributes used for ":echo" */ +/// Describe data to return from find_some_match() +typedef enum { + kSomeMatch, ///< Data for match(). + kSomeMatchEnd, ///< Data for matchend(). + kSomeMatchList, ///< Data for matchlist(). + kSomeMatchStr, ///< Data for matchstr(). + kSomeMatchStrPos, ///< Data for matchstrpos(). +} SomeMatchType; + /// trans_function_name() flags typedef enum { TFN_INT = 1, ///< May use internal function name @@ -12183,7 +12192,8 @@ static void f_mapcheck(typval_T *argvars, typval_T *rettv, FunPtr fptr) } -static void find_some_match(typval_T *argvars, typval_T *rettv, int type) +static void find_some_match(typval_T *const argvars, typval_T *const rettv, + const SomeMatchType type) { char_u *str = NULL; long len = 0; @@ -12204,24 +12214,36 @@ static void find_some_match(typval_T *argvars, typval_T *rettv, int type) p_cpo = (char_u *)""; rettv->vval.v_number = -1; - if (type == 3 || type == 4) { - // type 3: return empty list when there are no matches. - // type 4: return ["", -1, -1, -1] - tv_list_alloc_ret(rettv); - if (type == 4) { + switch (type) { + // matchlist(): return empty list when there are no matches. + case kSomeMatchList: { + tv_list_alloc_ret(rettv); + FALLTHROUGH; + } + // matchstrpos(): return ["", -1, -1, -1] + case kSomeMatchStrPos: { tv_list_append_string(rettv->vval.v_list, "", 0); tv_list_append_number(rettv->vval.v_list, -1); tv_list_append_number(rettv->vval.v_list, -1); tv_list_append_number(rettv->vval.v_list, -1); + break; + } + case kSomeMatchStr: { + rettv->v_type = VAR_STRING; + rettv->vval.v_string = NULL; + break; + } + case kSomeMatch: + case kSomeMatchEnd: { + // Do nothing: zero is default. + break; } - } else if (type == 2) { - rettv->v_type = VAR_STRING; - rettv->vval.v_string = NULL; } if (argvars[0].v_type == VAR_LIST) { - if ((l = argvars[0].vval.v_list) == NULL) + if ((l = argvars[0].vval.v_list) == NULL) { goto theend; + } li = tv_list_first(l); } else { expr = str = (char_u *)tv_get_string(&argvars[0]); @@ -12311,63 +12333,72 @@ static void find_some_match(typval_T *argvars, typval_T *rettv, int type) } if (match) { - if (type == 4) { - list_T *const ret_l = rettv->vval.v_list; - listitem_T *li1 = tv_list_first(ret_l); - listitem_T *li2 = TV_LIST_ITEM_NEXT(ret_l, li1); - listitem_T *li3 = TV_LIST_ITEM_NEXT(ret_l, li2); - listitem_T *li4 = TV_LIST_ITEM_NEXT(ret_l, li3); - xfree(TV_LIST_ITEM_TV(li1)->vval.v_string); + switch (type) { + case kSomeMatchStrPos: { + list_T *const ret_l = rettv->vval.v_list; + listitem_T *li1 = tv_list_first(ret_l); + listitem_T *li2 = TV_LIST_ITEM_NEXT(ret_l, li1); + listitem_T *li3 = TV_LIST_ITEM_NEXT(ret_l, li2); + listitem_T *li4 = TV_LIST_ITEM_NEXT(ret_l, li3); + xfree(TV_LIST_ITEM_TV(li1)->vval.v_string); - const size_t rd = (size_t)(regmatch.endp[0] - regmatch.startp[0]); - TV_LIST_ITEM_TV(li1)->vval.v_string = xmemdupz( - (const char *)regmatch.startp[0], rd); - TV_LIST_ITEM_TV(li3)->vval.v_number = (varnumber_T)( - regmatch.startp[0] - expr); - TV_LIST_ITEM_TV(li4)->vval.v_number = (varnumber_T)( - regmatch.endp[0] - expr); - if (l != NULL) { - TV_LIST_ITEM_TV(li2)->vval.v_number = (varnumber_T)idx; + const size_t rd = (size_t)(regmatch.endp[0] - regmatch.startp[0]); + TV_LIST_ITEM_TV(li1)->vval.v_string = xmemdupz( + (const char *)regmatch.startp[0], rd); + TV_LIST_ITEM_TV(li3)->vval.v_number = (varnumber_T)( + regmatch.startp[0] - expr); + TV_LIST_ITEM_TV(li4)->vval.v_number = (varnumber_T)( + regmatch.endp[0] - expr); + if (l != NULL) { + TV_LIST_ITEM_TV(li2)->vval.v_number = (varnumber_T)idx; + } + break; } - } else if (type == 3) { - int i; - - /* return list with matched string and submatches */ - for (i = 0; i < NSUBEXP; ++i) { - if (regmatch.endp[i] == NULL) { - tv_list_append_string(rettv->vval.v_list, NULL, 0); + case kSomeMatchList: { + // Return list with matched string and submatches. + for (int i = 0; i < NSUBEXP; ++i) { + if (regmatch.endp[i] == NULL) { + tv_list_append_string(rettv->vval.v_list, NULL, 0); + } else { + tv_list_append_string(rettv->vval.v_list, + (const char *)regmatch.startp[i], + (regmatch.endp[i] - regmatch.startp[i])); + } + } + break; + } + case kSomeMatchStr: { + // Return matched string. + if (l != NULL) { + tv_copy(TV_LIST_ITEM_TV(li), rettv); } else { - tv_list_append_string(rettv->vval.v_list, - (const char *)regmatch.startp[i], - (regmatch.endp[i] - regmatch.startp[i])); + rettv->vval.v_string = (char_u *)xmemdupz( + (const char *)regmatch.startp[0], + (size_t)(regmatch.endp[0] - regmatch.startp[0])); + } + break; + } + case kSomeMatch: + case kSomeMatchEnd: { + if (l != NULL) { + rettv->vval.v_number = idx; + } else { + if (type == kSomeMatchEnd) { + rettv->vval.v_number = + (varnumber_T)(regmatch.startp[0] - str); + } else { + rettv->vval.v_number = + (varnumber_T)(regmatch.endp[0] - str); + } + rettv->vval.v_number += (varnumber_T)(str - expr); } } - } else if (type == 2) { - // Return matched string. - if (l != NULL) { - tv_copy(TV_LIST_ITEM_TV(li), rettv); - } else { - rettv->vval.v_string = (char_u *)xmemdupz( - (const char *)regmatch.startp[0], - (size_t)(regmatch.endp[0] - regmatch.startp[0])); - } - } else if (l != NULL) { - rettv->vval.v_number = idx; - } else { - if (type != 0) { - rettv->vval.v_number = - (varnumber_T)(regmatch.startp[0] - str); - } else { - rettv->vval.v_number = - (varnumber_T)(regmatch.endp[0] - str); - } - rettv->vval.v_number += (varnumber_T)(str - expr); } } vim_regfree(regmatch.regprog); } - if (type == 4 && l == NULL) { + if (type == kSomeMatchStrPos && l == NULL) { // matchstrpos() without a list: drop the second item list_T *const ret_l = rettv->vval.v_list; tv_list_item_remove(ret_l, TV_LIST_ITEM_NEXT(ret_l, tv_list_first(ret_l))); @@ -12383,7 +12414,7 @@ theend: */ static void f_match(typval_T *argvars, typval_T *rettv, FunPtr fptr) { - find_some_match(argvars, rettv, 1); + find_some_match(argvars, rettv, kSomeMatch); } /* @@ -12528,7 +12559,7 @@ static void f_matchdelete(typval_T *argvars, typval_T *rettv, FunPtr fptr) */ static void f_matchend(typval_T *argvars, typval_T *rettv, FunPtr fptr) { - find_some_match(argvars, rettv, 0); + find_some_match(argvars, rettv, kSomeMatchEnd); } /* @@ -12536,7 +12567,7 @@ static void f_matchend(typval_T *argvars, typval_T *rettv, FunPtr fptr) */ static void f_matchlist(typval_T *argvars, typval_T *rettv, FunPtr fptr) { - find_some_match(argvars, rettv, 3); + find_some_match(argvars, rettv, kSomeMatchList); } /* @@ -12544,13 +12575,13 @@ static void f_matchlist(typval_T *argvars, typval_T *rettv, FunPtr fptr) */ static void f_matchstr(typval_T *argvars, typval_T *rettv, FunPtr fptr) { - find_some_match(argvars, rettv, 2); + find_some_match(argvars, rettv, kSomeMatchStr); } /// "matchstrpos()" function static void f_matchstrpos(typval_T *argvars, typval_T *rettv, FunPtr fptr) { - find_some_match(argvars, rettv, 4); + find_some_match(argvars, rettv, kSomeMatchStrPos); } /// Get maximal/minimal number value in a list or dictionary