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-rw-r--r--src/blogc.c6
-rw-r--r--src/file.c9
-rw-r--r--src/utf8.c88
-rw-r--r--src/utf8.h19
4 files changed, 122 insertions, 0 deletions
diff --git a/src/blogc.c b/src/blogc.c
index 40a5918..4606740 100644
--- a/src/blogc.c
+++ b/src/blogc.c
@@ -30,6 +30,7 @@
#include "loader.h"
#include "renderer.h"
#include "error.h"
+#include "utf8.h"
#include "utils.h"
#ifndef PACKAGE_VERSION
@@ -125,6 +126,11 @@ main(int argc, char **argv)
sb_trie_insert(config, "BLOGC_VERSION", sb_strdup(PACKAGE_VERSION));
for (unsigned int i = 1; i < argc; i++) {
+ if (!blogc_utf8_validate((uint8_t*) argv[i], strlen(argv[i]))) {
+ fprintf(stderr, "blogc: error: command-line argument is not utf8-"
+ "encoded: %s\n", argv[i]);
+ goto cleanup;
+ }
tmp = NULL;
if (argv[i][0] == '-') {
switch (argv[i][1]) {
diff --git a/src/file.c b/src/file.c
index f784d93..7171f31 100644
--- a/src/file.c
+++ b/src/file.c
@@ -16,6 +16,7 @@
#include <string.h>
#include "file.h"
#include "error.h"
+#include "utf8.h"
#include "utils.h"
// this would belong to loader.c, but we need it in a separated file to be
@@ -47,6 +48,14 @@ blogc_file_get_contents(const char *path, size_t *len, blogc_error_t **err)
sb_string_append_len(str, buffer, read_len);
}
fclose(fp);
+
+ if (!blogc_utf8_validate_str(str)) {
+ *err = blogc_error_new_printf(BLOGC_ERROR_LOADER,
+ "File content is not valid UTF-8: %s", path);
+ sb_string_free(str, true);
+ return NULL;
+ }
+
return sb_string_free(str, false);
}
diff --git a/src/utf8.c b/src/utf8.c
new file mode 100644
index 0000000..deea46d
--- /dev/null
+++ b/src/utf8.c
@@ -0,0 +1,88 @@
+/*
+ * blogc: A blog compiler.
+ * Copyright (c) 2008-2010 Bjoern Hoehrmann <bjoern@hoehrmann.de>
+ * Copyright (c) 2016 Rafael G. Martins <rafael@rafaelmartins.eng.br>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+// Based on Bjoern Hoehrmann's algorithm.
+// See http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ for details.
+
+#include <stdbool.h>
+#include <inttypes.h>
+#include "utils.h"
+
+#define UTF8_ACCEPT 0
+#define UTF8_REJECT 12
+
+
+static const uint8_t utf8d[] = {
+ // The first part of the table maps bytes to character classes that
+ // to reduce the size of the transition table and create bitmasks.
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
+ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+ 8,8,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
+ 10,3,3,3,3,3,3,3,3,3,3,3,3,4,3,3, 11,6,6,6,5,8,8,8,8,8,8,8,8,8,8,8,
+
+ // The second part is a transition table that maps a combination
+ // of a state of the automaton and a character class to a state.
+ 0,12,24,36,60,96,84,12,12,12,48,72, 12,12,12,12,12,12,12,12,12,12,12,12,
+ 12, 0,12,12,12,12,12, 0,12, 0,12,12, 12,24,12,12,12,12,12,24,12,24,12,12,
+ 12,12,12,12,12,12,12,24,12,12,12,12, 12,24,12,12,12,12,12,12,12,24,12,12,
+ 12,12,12,12,12,12,12,36,12,36,12,12, 12,36,12,12,12,12,12,36,12,36,12,12,
+ 12,36,12,12,12,12,12,12,12,12,12,12,
+};
+
+
+static uint32_t inline
+decode(uint32_t* state, uint32_t* codep, uint32_t byte) {
+ uint32_t type = utf8d[byte];
+
+ *codep = (*state != UTF8_ACCEPT) ?
+ (byte & 0x3fu) | (*codep << 6) :
+ (0xff >> type) & (byte);
+
+ *state = utf8d[256 + *state + type];
+ return *state;
+}
+
+
+bool
+blogc_utf8_validate(const uint8_t *str, size_t len)
+{
+ uint32_t codepoint;
+ uint32_t state = 0;
+
+ for (size_t i = 0; i < len; i++)
+ decode(&state, &codepoint, str[i]);
+
+ return state == UTF8_ACCEPT;
+}
+
+
+bool
+blogc_utf8_validate_str(sb_string_t *str)
+{
+ return blogc_utf8_validate((uint8_t*) str->str, str->len);
+}
diff --git a/src/utf8.h b/src/utf8.h
new file mode 100644
index 0000000..837d02f
--- /dev/null
+++ b/src/utf8.h
@@ -0,0 +1,19 @@
+/*
+ * blogc: A blog compiler.
+ * Copyright (C) 2015-2016 Rafael G. Martins <rafael@rafaelmartins.eng.br>
+ *
+ * This program can be distributed under the terms of the BSD License.
+ * See the file LICENSE.
+ */
+
+#ifndef _UTF_8_H
+#define _UTF_8_H
+
+#include <inttypes.h>
+#include <stdbool.h>
+#include "utils.h"
+
+bool blogc_utf8_validate(const uint8_t *str, size_t len);
+bool blogc_utf8_validate_str(sb_string_t *str);
+
+#endif /* _UTF_8_H */