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deps/libgit2/src/libgit2/path.c  view on Meta::CPAN

/*
 * Copyright (C) the libgit2 contributors. All rights reserved.
 *
 * This file is part of libgit2, distributed under the GNU GPL v2 with
 * a Linking Exception. For full terms see the included COPYING file.
 */

#include "path.h"

#include "repository.h"
#include "fs_path.h"
#include "utf8.h"

typedef struct {
	git_repository *repo;
	uint16_t file_mode;
	unsigned int flags;
} repository_path_validate_data;

static int32_t next_hfs_char(const char **in, size_t *len)
{
	while (*len) {
		uint32_t codepoint;
		int cp_len = git_utf8_iterate(&codepoint, *in, *len);
		if (cp_len < 0)
			return -1;

		(*in) += cp_len;
		(*len) -= cp_len;

		/* these code points are ignored completely */
		switch (codepoint) {
		case 0x200c: /* ZERO WIDTH NON-JOINER */
		case 0x200d: /* ZERO WIDTH JOINER */
		case 0x200e: /* LEFT-TO-RIGHT MARK */
		case 0x200f: /* RIGHT-TO-LEFT MARK */
		case 0x202a: /* LEFT-TO-RIGHT EMBEDDING */
		case 0x202b: /* RIGHT-TO-LEFT EMBEDDING */
		case 0x202c: /* POP DIRECTIONAL FORMATTING */
		case 0x202d: /* LEFT-TO-RIGHT OVERRIDE */
		case 0x202e: /* RIGHT-TO-LEFT OVERRIDE */
		case 0x206a: /* INHIBIT SYMMETRIC SWAPPING */
		case 0x206b: /* ACTIVATE SYMMETRIC SWAPPING */
		case 0x206c: /* INHIBIT ARABIC FORM SHAPING */
		case 0x206d: /* ACTIVATE ARABIC FORM SHAPING */
		case 0x206e: /* NATIONAL DIGIT SHAPES */
		case 0x206f: /* NOMINAL DIGIT SHAPES */
		case 0xfeff: /* ZERO WIDTH NO-BREAK SPACE */
			continue;
		}

		/* fold into lowercase -- this will only fold characters in
		 * the ASCII range, which is perfectly fine, because the
		 * git folder name can only be composed of ascii characters
		 */
		return git__tolower((int)codepoint);
	}
	return 0; /* NULL byte -- end of string */
}

static bool validate_dotgit_hfs_generic(
	const char *path,
	size_t len,
	const char *needle,
	size_t needle_len)
{
	size_t i;
	char c;

	if (next_hfs_char(&path, &len) != '.')
		return true;

	for (i = 0; i < needle_len; i++) {
		c = next_hfs_char(&path, &len);
		if (c != needle[i])
			return true;
	}

	if (next_hfs_char(&path, &len) != '\0')
		return true;

	return false;
}

static bool validate_dotgit_hfs(const char *path, size_t len)
{
	return validate_dotgit_hfs_generic(path, len, "git", CONST_STRLEN("git"));
}

GIT_INLINE(bool) validate_dotgit_ntfs(
	git_repository *repo,
	const char *path,
	size_t len)
{
	git_str *reserved = git_repository__reserved_names_win32;
	size_t reserved_len = git_repository__reserved_names_win32_len;
	size_t start = 0, i;