diff options
Diffstat (limited to 'lib/erl_interface/src/encode/encode_atom.c')
| -rw-r--r-- | lib/erl_interface/src/encode/encode_atom.c | 33 |
1 files changed, 17 insertions, 16 deletions
diff --git a/lib/erl_interface/src/encode/encode_atom.c b/lib/erl_interface/src/encode/encode_atom.c index 4a2147073f..32f5ae2af1 100644 --- a/lib/erl_interface/src/encode/encode_atom.c +++ b/lib/erl_interface/src/encode/encode_atom.c @@ -23,8 +23,8 @@ #include "putget.h" -static int copy_ascii_atom(char* dst, const char* src, int slen); -static int copy_utf8_atom(char* dst, const char* src, int slen); +static int verify_ascii_atom(const char* src, int slen); +static int verify_utf8_atom(const char* src, int slen); int ei_encode_atom(char *buf, int *index, const char *p) @@ -73,7 +73,8 @@ int ei_encode_atom_len_as(char *buf, int *index, const char *p, int len, if (len < 0) return -1; break; case ERLANG_ASCII: - if (copy_ascii_atom(s+2, p, len) < 0) return -1; + if (verify_ascii_atom(p, len) < 0) return -1; + memcpy(s+2, p, len); break; case ERLANG_LATIN1: memcpy(s+2, p, len); @@ -88,7 +89,8 @@ int ei_encode_atom_len_as(char *buf, int *index, const char *p, int len, if (from_enc == ERLANG_UTF8) { len = utf8_to_latin1(NULL, p, len, MAXATOMLEN-1, NULL); if (len < 0) return -1; - } + } else if (from_enc == ERLANG_ASCII) + if (verify_ascii_atom(p, len) < 0) return -1; } break; @@ -100,11 +102,13 @@ int ei_encode_atom_len_as(char *buf, int *index, const char *p, int len, len = latin1_to_utf8((buf ? s+offs : NULL), p, len, MAXATOMLEN_UTF8-1, NULL); break; case ERLANG_ASCII: - if (buf && copy_ascii_atom(s+offs, p, len) < 0) return -1; + if (verify_ascii_atom(p, len) < 0) return -1; + if (buf) memcpy(s+offs,p,len); break; case ERLANG_UTF8: if (len >= 256) offs++; - if (buf && copy_utf8_atom(s+offs, p, len) < 0) return -1; + if (verify_utf8_atom(p, len) < 0) return -1; + if (buf) memcpy(s+offs,p,len); break; default: return -1; @@ -144,17 +148,17 @@ ei_internal_put_atom(char** bufp, const char* p, int slen, } -int copy_ascii_atom(char* dst, const char* src, int slen) +int verify_ascii_atom(const char* src, int slen) { while (slen > 0) { if ((src[0] & 0x80) != 0) return -1; - *dst++ = *src++; + src++; slen--; } return 0; } -int copy_utf8_atom(char* dst, const char* src, int slen) +int verify_utf8_atom(const char* src, int slen) { int num_chars = 0; @@ -163,25 +167,22 @@ int copy_utf8_atom(char* dst, const char* src, int slen) if ((src[0] & 0x80) != 0) { if ((src[0] & 0xE0) == 0xC0) { if (slen < 2 || (src[1] & 0xC0) != 0x80) return -1; - *dst++ = *src++; + src++; slen--; } else if ((src[0] & 0xF0) == 0xE0) { if (slen < 3 || (src[1] & 0xC0) != 0x80 || (src[2] & 0xC0) != 0x80) return -1; - *dst++ = *src++; - *dst++ = *src++; + src += 2; slen -= 2; } else if ((src[0] & 0xF8) == 0xF0) { if (slen < 4 || (src[1] & 0xC0) != 0x80 || (src[2] & 0xC0) != 0x80 || (src[3] & 0xC0) != 0x80) return -1; - *dst++ = *src++; - *dst++ = *src++; - *dst++ = *src++; + src += 3; slen -= 3; } else return -1; } - *dst++ = *src++; + src++; slen--; } return 0; |