Annotation of parser3/src/include/pa_array.h, revision 1.13
1.1 paf 1: /*
1.13 ! paf 2: $Id: pa_array.h,v 1.12 2001/01/29 20:46:21 paf Exp $
1.1 paf 3: */
4:
5: /*
6:
7: Array Chunk0
8: ====== ========
9: head--------------->[ptr]
10: append_here-------->[ptr]
11: link_row ........
12: . .
13: . [ptr]
14: ...........>[link to the next chunk]
15:
16: */
17:
18: #ifndef PA_ARRAY_H
19: #define PA_ARRAY_H
20:
21: #include <stddef.h>
22:
1.13 ! paf 23: #include "pa_pool.h"
1.1 paf 24: #include "pa_types.h"
1.11 paf 25: #include "pa_string.h"
1.1 paf 26:
1.13 ! paf 27: class Array : public Pooled {
1.1 paf 28: public:
1.7 paf 29:
1.11 paf 30: typedef void Item;
1.10 paf 31:
1.1 paf 32: enum {
1.7 paf 33: CR_INITIAL_ROWS_DEFAULT=10,
1.1 paf 34: CR_GROW_PERCENT=60
35: };
36:
1.6 paf 37: public:
38:
1.11 paf 39: Array(Pool& apool, int initial_rows=CR_INITIAL_ROWS_DEFAULT);
1.7 paf 40:
1.12 paf 41: int size() const { return fused_rows; }
42: Array& operator += (const Item *src);
43: Array& append_array(const Array& src);
44: const Item *get(int index) const;
45: const char *get_cstr(int index) const {
46: return static_cast<const char *>(get(index));
47: }
48: const String *get_string(int index) const {
49: return static_cast<const String *>(get(index));
50: }
1.1 paf 51:
1.7 paf 52: private:
53:
1.1 paf 54: struct Chunk {
55: // the number of rows in chunk
56: int count;
57: union Row {
1.12 paf 58: const Item *item;
1.1 paf 59: Chunk *link; // link to the next chunk in chain
60: } rows[1];
61: // next rows are here
62: }
63: *head; // the head chunk of the chunk chain
64:
1.5 paf 65: // last allocated chunk
66: // helps appending Arrays
67: Chunk *tail;
68:
1.1 paf 69: // next append would write to this record
70: Chunk::Row *append_here;
71:
72: // the address of place where lies address
73: // of the link to the next chunk to allocate
74: Chunk::Row *link_row;
75:
76: private:
1.7 paf 77:
1.1 paf 78: // array size
79: int fused_rows;
80:
1.12 paf 81: mutable int cache_chunk_base;
82: mutable Chunk *cache_chunk;
1.2 paf 83:
1.1 paf 84: private:
85:
86: bool chunk_is_full() {
87: return append_here == link_row;
88: }
1.5 paf 89: void expand(int chunk_rows);
1.2 paf 90:
1.1 paf 91: private: //disabled
92:
1.11 paf 93: //Array(Array&) { }
1.12 paf 94: Array& operator = (const Array&) { return *this; }
1.1 paf 95: };
96:
97: #endif
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