isl_map_read: accept '*' in affine expressions
[platform/upstream/isl.git] / isl_name.c
1 /*
2  * Copyright 2008-2009 Katholieke Universiteit Leuven
3  *
4  * Use of this software is governed by the GNU LGPLv2.1 license
5  *
6  * Written by Sven Verdoolaege, K.U.Leuven, Departement
7  * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
8  */
9
10 #include <string.h>
11 #include "isl_name.h"
12
13 struct isl_name *isl_name_alloc(struct isl_ctx *ctx, const char *s)
14 {
15         const char *copy = strdup(s);
16         struct isl_name *name;
17
18         if (!copy)
19                 return NULL;
20         name = isl_alloc_type(ctx, struct isl_name);
21         if (!name)
22                 return NULL;
23
24         name->ref = 1;
25         name->name = copy;
26
27         return name;
28 }
29
30 static int isl_name_has_name(const void *entry, const void *val)
31 {
32         struct isl_name *name = (struct isl_name *)entry;
33         const char *s = (const char *)val;
34
35         return !strcmp(name->name, s);
36 }
37
38 struct isl_name *isl_name_get(struct isl_ctx *ctx, const char *name)
39 {
40         struct isl_hash_table_entry *entry;
41         uint32_t name_hash;
42
43         name_hash = isl_hash_string(isl_hash_init(), name);
44         entry = isl_hash_table_find(ctx, &ctx->name_hash, name_hash,
45                                         isl_name_has_name, name, 1);
46         if (!entry)
47                 return NULL;
48         if (entry->data)
49                 return isl_name_copy(ctx, entry->data);
50         entry->data = isl_name_alloc(ctx, name);
51         if (!entry->data)
52                 ctx->name_hash.n--;
53         return entry->data;
54 }
55
56 struct isl_name *isl_name_copy(struct isl_ctx *ctx, struct isl_name *name)
57 {
58         if (!name)
59                 return NULL;
60
61         name->ref++;
62         return name;
63 }
64
65 static int isl_name_eq(const void *entry, const void *name)
66 {
67         return entry == name;
68 }
69
70 void isl_name_free(struct isl_ctx *ctx, struct isl_name *name)
71 {
72         uint32_t name_hash;
73         struct isl_hash_table_entry *entry;
74
75         if (!name)
76                 return;
77
78         if (--name->ref > 0)
79                 return;
80
81         name_hash = isl_hash_string(isl_hash_init(), name->name);
82         entry = isl_hash_table_find(ctx, &ctx->name_hash, name_hash,
83                                         isl_name_eq, name, 0);
84         isl_assert(ctx, entry, return);
85         isl_hash_table_remove(ctx, &ctx->name_hash, entry);
86
87         free((char *)name->name);
88         free(name);
89 }