103 lines · c
1/* SPDX-License-Identifier: GPL-2.0+ */2/* utils.h3 * originally written by: Kirk Reiser.4 *5 ** Copyright (C) 2002 Kirk Reiser.6 * Copyright (C) 2003 David Borowski.7 */8 9#include <stdio.h>10 11#define MAXKEYS 51212#define MAXKEYVAL 16013#define HASHSIZE 10114#define is_shift -315#define is_spk -216#define is_input -117 18struct st_key {19 char *name;20 struct st_key *next;21 int value, shift;22};23 24struct st_key key_table[MAXKEYS];25struct st_key *extra_keys = key_table+HASHSIZE;26char *def_name, *def_val;27FILE *infile;28int lc;29 30char filename[256];31 32static inline void open_input(const char *dir_name, const char *name)33{34 if (dir_name)35 snprintf(filename, sizeof(filename), "%s/%s", dir_name, name);36 else37 snprintf(filename, sizeof(filename), "%s", name);38 infile = fopen(filename, "r");39 if (infile == 0) {40 fprintf(stderr, "can't open %s\n", filename);41 exit(1);42 }43 lc = 0;44}45 46static inline int oops(const char *msg, const char *info)47{48 if (info == NULL)49 info = "";50 fprintf(stderr, "error: file %s line %d\n", filename, lc);51 fprintf(stderr, "%s %s\n", msg, info);52 exit(1);53}54 55static inline struct st_key *hash_name(char *name)56{57 unsigned char *pn = (unsigned char *)name;58 int hash = 0;59 60 while (*pn) {61 hash = (hash * 17) & 0xfffffff;62 if (isupper(*pn))63 *pn = tolower(*pn);64 hash += (int)*pn;65 pn++;66 }67 hash %= HASHSIZE;68 return &key_table[hash];69}70 71static inline struct st_key *find_key(char *name)72{73 struct st_key *this = hash_name(name);74 75 while (this) {76 if (this->name && !strcmp(name, this->name))77 return this;78 this = this->next;79 }80 return this;81}82 83static inline struct st_key *add_key(char *name, int value, int shift)84{85 struct st_key *this = hash_name(name);86 87 if (extra_keys-key_table >= MAXKEYS)88 oops("out of key table space, enlarge MAXKEYS", NULL);89 if (this->name != NULL) {90 while (this->next) {91 if (!strcmp(name, this->name))92 oops("attempt to add duplicate key", name);93 this = this->next;94 }95 this->next = extra_keys++;96 this = this->next;97 }98 this->name = strdup(name);99 this->value = value;100 this->shift = shift;101 return this;102}103