| 1 |
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| 2 | |
| 3 | * originally written by: Kirk Reiser.
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| 4 | *
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| 5 | ** Copyright (C) 2002 Kirk Reiser.
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| 6 | * Copyright (C) 2003 David Borowski.
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| 7 |
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| 8 |
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| 9 | #include <stdio.h>
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| 10 |
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| 11 | #define MAXKEYS 512
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| 12 | #define MAXKEYVAL 160
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| 13 | #define HASHSIZE 101
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| 14 | #define is_shift -3
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| 15 | #define is_spk -2
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| 16 | #define is_input -1
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| 17 |
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| 18 | struct st_key {
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| 19 | char *name;
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| 20 | struct st_key *next;
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| 21 | int value, shift;
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| 22 | };
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| 23 |
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| 24 | struct st_key key_table[MAXKEYS];
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| 25 | struct st_key *extra_keys = key_table+HASHSIZE;
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| 26 | char *def_name, *def_val;
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| 27 | FILE *infile;
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| 28 | int lc;
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| 29 |
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| 30 | char filename[256];
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| 31 |
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| 32 | static inline void open_input(const char *dir_name, const char *name)
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| 33 | {
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| 34 | if (dir_name)
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| 35 | snprintf(filename, sizeof(filename), "%s/%s", dir_name, name);
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| 36 | else
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| 37 | snprintf(filename, sizeof(filename), "%s", name);
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| 38 | infile = fopen(filename, "r");
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| 39 | if (!infile) {
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| 40 | fprintf(stderr, "can't open %s\n", filename);
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| 41 | exit(1);
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| 42 | }
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| 43 | lc = 0;
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| 44 | }
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| 45 |
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| 46 | static inline int oops(const char *msg, const char *info)
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| 47 | {
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| 48 | if (info == NULL)
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| 49 | info = "";
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| 50 | fprintf(stderr, "error: file %s line %d\n", filename, lc);
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| 51 | fprintf(stderr, "%s %s\n", msg, info);
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| 52 | exit(1);
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| 53 | }
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| 54 |
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| 55 | static inline struct st_key *hash_name(char *name)
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| 56 | {
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| 57 | unsigned char *pn = (unsigned char *)name;
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| 58 | int hash = 0;
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| 59 |
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| 60 | while (*pn) {
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| 61 | hash = (hash * 17) & 0xfffffff;
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| 62 | if (isupper(*pn))
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| 63 | *pn = tolower(*pn);
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| 64 | hash += (int)*pn;
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| 65 | pn++;
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| 66 | }
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| 67 | hash %= HASHSIZE;
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| 68 | return &key_table[hash];
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| 69 | }
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| 70 |
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| 71 | static inline struct st_key *find_key(char *name)
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| 72 | {
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| 73 | struct st_key *this = hash_name(name);
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| 74 |
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| 75 | while (this) {
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| 76 | if (this->name && !strcmp(name, this->name))
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| 77 | return this;
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| 78 | this = this->next;
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| 79 | }
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| 80 | return this;
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| 81 | }
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| 82 |
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| 83 | static inline struct st_key *add_key(char *name, int value, int shift)
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| 84 | {
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| 85 | struct st_key *this = hash_name(name);
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| 86 |
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| 87 | if (extra_keys-key_table >= MAXKEYS)
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| 88 | oops("out of key table space, enlarge MAXKEYS", NULL);
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| 89 | if (this->name != NULL) {
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| 90 | while (this->next) {
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| 91 | if (!strcmp(name, this->name))
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| 92 | oops("attempt to add duplicate key", name);
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| 93 | this = this->next;
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| 94 | }
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| 95 | this->next = extra_keys++;
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| 96 | this = this->next;
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| 97 | }
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| 98 | this->name = strdup(name);
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| 99 | this->value = value;
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| 100 | this->shift = shift;
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| 101 | return this;
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| 102 | }
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