diff options
author | Stephen Dolan <mu@netsoc.tcd.ie> | 2013-06-22 13:34:24 +0100 |
---|---|---|
committer | Stephen Dolan <mu@netsoc.tcd.ie> | 2013-06-22 13:34:24 +0100 |
commit | ff48bd6ec538b01d1057be8e93b94eef6914e9ef (patch) | |
tree | 49b16387bc0741afebd2b22e265f5db3518fb473 /jv.c | |
parent | 54b9c9bdb225af5d886466d72f47eafc51acb4f7 (diff) |
Fix various UTF8 parsing bugs.
In particular, parse bad UTF8 by replacing the broken bits with U+FFFD
and resychronise correctly after broken sequences.
Diffstat (limited to 'jv.c')
-rw-r--r-- | jv.c | 41 |
1 files changed, 38 insertions, 3 deletions
@@ -377,6 +377,32 @@ static jvp_string* jvp_string_alloc(uint32_t size) { return s; } +/* Copy a UTF8 string, replacing all badly encoded points with U+FFFD */ +static jv_nontrivial jvp_string_copy_replace_bad(const char* data, uint32_t length) { + const char* end = data + length; + const char* i = data; + const char* cstart; + + uint32_t maxlength = length * 3 + 1; // worst case: all bad bytes, each becomes a 3-byte U+FFFD + jvp_string* s = jvp_string_alloc(maxlength); + char* out = s->data; + int c = 0; + + while ((i = jvp_utf8_next((cstart = i), end, &c))) { + if (c == -1) { + c = 0xFFFD; // U+FFFD REPLACEMENT CHARACTER + } + out += jvp_utf8_encode(c, out); + assert(out < s->data + maxlength); + } + length = out - s->data; + s->data[length] = 0; + s->length_hashed = length << 1; + jv_nontrivial r = {&s->refcnt, {0,0}}; + return r; +} + +/* Assumes valid UTF8 */ static jv_nontrivial jvp_string_new(const char* data, uint32_t length) { jvp_string* s = jvp_string_alloc(length); s->length_hashed = length << 1; @@ -523,7 +549,9 @@ static int jvp_string_equal(jv_nontrivial* a, jv_nontrivial* b) { jv jv_string_sized(const char* str, int len) { jv j; j.kind = JV_KIND_STRING; - j.val.nontrivial = jvp_string_new(str, len); + j.val.nontrivial = jvp_utf8_is_valid(str, str+len) ? + jvp_string_new(str, len) : + jvp_string_copy_replace_bad(str, len); return j; } @@ -568,14 +596,21 @@ jv jv_string_concat(jv a, jv b) { } jv jv_string_append_buf(jv a, const char* buf, int len) { - jvp_string_append(&a.val.nontrivial, buf, len); + if (jvp_utf8_is_valid(buf, buf+len)) { + jvp_string_append(&a.val.nontrivial, buf, len); + } else { + jv b; + b.kind = JV_KIND_STRING; + b.val.nontrivial = jvp_string_copy_replace_bad(buf, len); + a = jv_string_concat(a, b); + } return a; } jv jv_string_append_str(jv a, const char* str) { return jv_string_append_buf(a, str, strlen(str)); } - + jv jv_string_fmt(const char* fmt, ...) { int size = 1024; while (1) { |