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Make `system.path_compare` more case-aware (#1457) 

* Use Lua-provided string lengths for `system.path_compare`
* Make `system.path_compare` more case-aware
   Before, strings like `README.md` would be sorted before `changelog.md`, 
   because we only looked at the raw ascii values.
   Now the character case is considered as a secondary sorting key.
This commit is contained in:
Guldoman 2023-04-07 20:41:32 +02:00 committed by GitHub
parent 4b97752301
commit 6d4bf4ff90
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 24 additions and 7 deletions
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29
src/api/system.c
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@ -1059,11 +1059,11 @@ static int f_load_native_plugin(lua_State *L) {
order used in the TreeView view of the project's files. Returns true iff
path1 < path2 in the TreeView order. */
static int f_path_compare(lua_State *L) {
const char *path1 = luaL_checkstring(L, 1);
size_t len1, len2;
const char *path1 = luaL_checklstring(L, 1, &len1);
const char *type1_s = luaL_checkstring(L, 2);
const char *path2 = luaL_checkstring(L, 3);
const char *path2 = luaL_checklstring(L, 3, &len2);
const char *type2_s = luaL_checkstring(L, 4);
const int len1 = strlen(path1), len2 = strlen(path2);
int type1 = strcmp(type1_s, "dir") != 0;
int type2 = strcmp(type2_s, "dir") != 0;
/* Find the index of the common part of the path. */
@ -1088,17 +1088,34 @@ static int f_path_compare(lua_State *L) {
return 1;
}
/* If types are the same compare the files' path alphabetically. */
int cfr = 0;
int cfr = -1;
int len_min = (len1 < len2 ? len1 : len2);
bool same_len = len1 == len2;
for (int j = offset; j <= len_min; j++) {
if (path1[j] == path2[j]) continue;
if (path1[j] == 0 || path2[j] == 0) {
if (cfr < 0) cfr = 0; // The strings are equal
if (!same_len) {
cfr = (path1[j] == 0);
}
} else if (path1[j] == path2[j]) {
continue;
} else if (path1[j] == PATHSEP || path2[j] == PATHSEP) {
/* For comparison we treat PATHSEP as if it was the string terminator. */
cfr = (path1[j] == PATHSEP);
} else {
cfr = (path1[j] < path2[j]);
char a = path1[j], b = path2[j];
if (a >= 'A' && a <= 'Z') a += 32;
if (b >= 'A' && b <= 'Z') b += 32;
if (a == b) {
/* If the strings have the same length, we need
to keep the first case sensitive difference. */
if (same_len && cfr < 0) {
/* Give priority to lower-case characters */
cfr = (path1[j] > path2[j]);
}
continue;
}
cfr = (a < b);
}
break;
}