1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/*
Copyright (C) 2019, 2020 Leo Tenenbaum.
This file is part of toc. toc is distributed under version 3 of the GNU General Public License, without any warranty whatsoever.
You should have received a copy of the GNU General Public License along with toc. If not, see <https://www.gnu.org/licenses/>.
*/
/* can this character be used in an identifier? */
static int is_ident(int c) {
if (c >= 'a' && c <= 'z')
return 1;
if (c >= 'A' && c <= 'Z')
return 1;
if (c >= '0' && c <= '9')
return 1;
if (c == '_') return 1;
#if CHAR_MIN < 0
if (c < 0) /* on systems where char = signed char, UTF-8 characters are probably < 0? */
return 1;
#endif
if (c > 127) /* UTF-8 */
return 1;
return 0;
}
/* Initialize Identifiers. */
static void idents_create(Identifiers *ids, Allocator *allocr, Block *scope) {
str_hash_table_create(&ids->table, sizeof(IdentSlot) - sizeof(StrHashTableSlot), allocr);
ids->rseed = 0x27182818;
ids->scope = scope;
}
/* advances s until a non-identifier character is reached, then returns the number of characters advanced */
static size_t ident_str_len_advance(char **s) {
char *original = *s;
while (is_ident(**s)) {
++*s;
}
return (size_t)(*s - original);
}
static size_t ident_str_len(char *s) {
return ident_str_len_advance(&s);
}
/* are these strings equal, up to the first non-ident character? */
static bool ident_str_eq_str(const char *s, const char *t) {
while (is_ident(*s) && is_ident(*t)) {
if (*s != *t) return false;
++s, ++t;
}
return !is_ident(*s) && !is_ident(*t);
}
static inline bool ident_eq_str(Identifier i, const char *s) {
return ident_str_eq_str(i->str, s);
}
static inline bool ident_eq_string(Identifier i, String s) {
if (i->len != s.len) return false;
if (memcmp(i->str, s.str, s.len) != 0) return false;
return true;
}
static inline Identifier ident_insert_with_len(Identifiers *ids, char *s, size_t len) {
IdentSlot *slot = (IdentSlot *)str_hash_table_insert_(&ids->table, s, len);
slot->idents = ids;
return slot;
}
/* moves s to the char after the identifier */
/* inserts if does not exist. reads until non-ident char is found. */
/* advances past identifier */
static inline Identifier ident_insert(Identifiers *ids, char **s) {
char *original = *s;
size_t len = ident_str_len_advance(s);
return ident_insert_with_len(ids, original, len);
}
static char *ident_to_str(Identifier i) {
char *str = err_malloc(i->len + 1);
/* for some reason, GCC thinks that i->len is -1 when this is called from type_to_str_ (in release mode) */
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wstringop-overflow"
#pragma GCC diagnostic ignored "-Wrestrict"
#pragma GCC diagnostic ignored "-Warray-bounds"
#endif
memcpy(str, i->str, i->len);
#if !defined(__clang__) && defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
str[i->len] = 0;
return str;
}
static String ident_to_string(Identifier i) {
String ret;
ret.str = i->str;
ret.len = i->len;
return ret;
}
static inline void fprint_ident_str(FILE *out, char *s) {
fwrite(s, 1, ident_str_len(s), out);
}
static void fprint_ident(FILE *out, Identifier id) {
fwrite(id->str, 1, id->len, out);
}
static void fprint_ident_debug(FILE *out, Identifier id) {
fprint_ident(out, id);
}
static void print_ident(Identifier id) {
fprint_ident_debug(stdout, id);
printf("\n");
}
/* reduced charset = a-z, A-Z, 0-9, _ */
static void fprint_ident_reduced_charset(FILE *out, Identifier id) {
assert(id);
for (const char *s = id->str; is_ident(*s); ++s) {
int c = (unsigned char)(*s);
if (c > 127) {
fprintf(out, "x__%02x", c);
} else {
putc(*s, out);
}
}
}
static char *ident_to_str_reduced_charset(Identifier id) {
assert(id);
size_t nchars = 0;
for (const char *s = id->str; is_ident(*s); ++s) {
int c = (unsigned char)(*s);
if (c > 127)
nchars += 5;
else
++nchars;
}
char *ret = err_malloc(nchars+1);
char *p = ret;
for (const char *s = id->str; is_ident(*s); ++s) {
int c = (unsigned char)(*s);
if (c > 127)
sprintf(p, "x__%02x", c);
else
*p = (char)c;
++p;
}
*p = 0;
assert(p == ret + nchars);
return ret;
}
static inline Identifier ident_get_with_len(Identifiers *ids, char *s, size_t len) {
return (Identifier)str_hash_table_get_(&ids->table, s, len);
}
/* NULL = no such identifier. returns identifier "foo" for both "foo\0" and "foo+92384324..." */
static inline Identifier ident_get(Identifiers *ids, char *s) {
size_t len = ident_str_len(s);
return ident_get_with_len(ids, s, len);
}
/* translate and insert if not already there */
static inline Identifier ident_translate_forced(Identifier i, Identifiers *to_idents) {
char *p = i->str;
Identifier translated = ident_insert(to_idents, &p);
assert(translated->idents == to_idents);
return translated;
}
/* translate but don't add it if it's not there */
static inline Identifier ident_translate(Identifier i, Identifiers *to_idents) {
return ident_get(to_idents, i->str);
}
/* returns true if i and j are equal, even if they're not in the same table */
static inline bool ident_eq(Identifier i, Identifier j) {
return i->len == j->len && memcmp(i->str, j->str, i->len) == 0;
}
static inline Block *ident_scope(Identifier i) {
return i->idents->scope;
}
#if RUN_TESTS
static void idents_test(void) {
Identifiers ids;
char b[] = "foo_variable bar";
char *s = b;
Allocator a;
allocr_create(&a);
idents_create(&ids, &a, NULL);
Identifier i1 = ident_insert(&ids, &s);
assert(streq(s, " bar"));
char b2[] = "foo_variable+6";
s = b2;
Identifier i2 = ident_insert(&ids, &s);
assert(streq(s, "+6"));
assert(i1 == i2);
allocr_free_all(&a);
}
#endif
static void idents_print_all(Identifiers *idents) {
str_hash_table_print(&idents->table);
}
static int ident_index_in_decl(Identifier i, Declaration *d) {
int index = 0;
arr_foreach(d->idents, Identifier, j) {
if (i == *j)
return index;
++index;
}
return -1;
}
static Location ident_decl_location(Identifier i) {
return i->decl->where;
}
|
