aboutsummaryrefslogtreecommitdiffstats
path: root/erts/emulator/beam/atom.h
diff options
context:
space:
mode:
Diffstat (limited to 'erts/emulator/beam/atom.h')
-rw-r--r--erts/emulator/beam/atom.h51
1 files changed, 37 insertions, 14 deletions
diff --git a/erts/emulator/beam/atom.h b/erts/emulator/beam/atom.h
index fd9c04d3d0..84dd6d8901 100644
--- a/erts/emulator/beam/atom.h
+++ b/erts/emulator/beam/atom.h
@@ -26,7 +26,9 @@
#include "erl_atom_table.h"
-#define MAX_ATOM_LENGTH 255
+#define MAX_ATOM_CHARACTERS 255
+#define MAX_ATOM_SZ_FROM_LATIN1 (2*MAX_ATOM_CHARACTERS)
+#define MAX_ATOM_SZ_LIMIT (4*MAX_ATOM_CHARACTERS) /* theoretical byte limit */
#define ATOM_LIMIT (1024*1024)
#define MIN_ATOM_TABLE_SIZE 8192
@@ -53,8 +55,8 @@ typedef struct atom {
extern IndexTable erts_atom_table;
ERTS_GLB_INLINE Atom* atom_tab(Uint i);
-ERTS_GLB_INLINE int erts_is_atom_bytes(byte *text, size_t len, Eterm term);
-ERTS_GLB_INLINE int erts_is_atom_str(char *str, Eterm term);
+ERTS_GLB_INLINE int erts_is_atom_utf8_bytes(byte *text, size_t len, Eterm term);
+ERTS_GLB_INLINE int erts_is_atom_str(const char *str, Eterm term, int is_latin1);
#if ERTS_GLB_INLINE_INCL_FUNC_DEF
ERTS_GLB_INLINE Atom*
@@ -63,7 +65,7 @@ atom_tab(Uint i)
return (Atom *) erts_index_lookup(&erts_atom_table, i);
}
-ERTS_GLB_INLINE int erts_is_atom_bytes(byte *text, size_t len, Eterm term)
+ERTS_GLB_INLINE int erts_is_atom_utf8_bytes(byte *text, size_t len, Eterm term)
{
Atom *a;
if (!is_atom(term))
@@ -73,30 +75,50 @@ ERTS_GLB_INLINE int erts_is_atom_bytes(byte *text, size_t len, Eterm term)
&& sys_memcmp((void *) a->name, (void *) text, len) == 0);
}
-ERTS_GLB_INLINE int erts_is_atom_str(char *str, Eterm term)
+ERTS_GLB_INLINE int erts_is_atom_str(const char *str, Eterm term, int is_latin1)
{
Atom *a;
int i, len;
- char *aname;
+ const byte* aname;
+ const byte* s = (const byte*) str;
+
if (!is_atom(term))
return 0;
a = atom_tab(atom_val(term));
len = a->len;
- aname = (char *) a->name;
- for (i = 0; i < len; i++)
- if (aname[i] != str[i] || str[i] == '\0')
- return 0;
- return str[len] == '\0';
+ aname = a->name;
+ if (is_latin1) {
+ for (i = 0; i < len; s++) {
+ if (aname[i] < 0x80) {
+ if (aname[i] != *s || *s == '\0')
+ return 0;
+ i++;
+ }
+ else {
+ if (aname[i] != (0xC0 | (*s >> 6)) ||
+ aname[i+1] != (0x80 | (*s & 0x3F))) {
+ return 0;
+ }
+ i += 2;
+ }
+ }
+ }
+ else {
+ for (i = 0; i < len; i++, s++)
+ if (aname[i] != *s || *s == '\0')
+ return 0;
+ }
+ return *s == '\0';
}
#endif
/*
* Note, ERTS_IS_ATOM_STR() expects the first argument to be a
- * string literal.
+ * 7-bit ASCII string literal.
*/
#define ERTS_IS_ATOM_STR(LSTR, TERM) \
- (erts_is_atom_bytes((byte *) LSTR, sizeof(LSTR) - 1, (TERM)))
+ (erts_is_atom_utf8_bytes((byte *) LSTR, sizeof(LSTR) - 1, (TERM)))
#define ERTS_DECL_AM(S) Eterm AM_ ## S = am_atom_put(#S, sizeof(#S) - 1)
#define ERTS_INIT_AM(S) AM_ ## S = am_atom_put(#S, sizeof(#S) - 1)
@@ -104,12 +126,13 @@ int atom_table_size(void); /* number of elements */
int atom_table_sz(void); /* table size in bytes, excluding stored objects */
Eterm am_atom_put(const char*, int); /* most callers pass plain char*'s */
+Eterm am_atom_put2(const byte*, int, int is_latin1);
int atom_erase(byte*, int);
int atom_static_put(byte*, int);
void init_atom_table(void);
void atom_info(int, void *);
void dump_atoms(int, void *);
-int erts_atom_get(const char* name, int len, Eterm* ap);
+int erts_atom_get(const char* name, int len, Eterm* ap, int is_latin1);
void erts_atom_get_text_space_sizes(Uint *reserved, Uint *used);
#endif