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typedef char *string;
typedef const char *conststring;
typedef struct _pairlist {
string name;
string value;
struct _pairlist *next;
} *pairlist;
typedef unsigned int MediaSet;
enum _Media {
MediaNone = 0,
MediaPrint = (1 << 0),
MediaScreen = (1 << 1),
MediaTTY = (1 << 2),
MediaBraille = (1 << 3),
MediaTV = (1 << 4),
MediaProjection = (1 << 5),
MediaEmbossed = (1 << 6),
MediaAll = 0xFF
};
#define eq(s, t) (*(s) == *(t) && strcmp(s, t) == 0)
#define hexval(c) ((c) <= '9' ? (c)-'0' : (c) <= 'F' ? 10+(c)-'A' : 10+(c)-'a')
extern void pairlist_delete(pairlist p);
extern pairlist pairlist_copy(const pairlist p);
extern conststring pairlist_get(pairlist p, const conststring name);
extern void pairlist_set(pairlist *p, const conststring name,
const conststring val);
extern _Bool pairlist_unset(pairlist *p, const conststring name);
extern string strapp(string *s,...);
extern void chomp(string s);
extern int min(int a, int b);
extern int max(int a, int b);
extern string down(const string s);
extern _Bool hasprefix(conststring s, conststring prefix);
extern _Bool hasaffix(conststring s, conststring affix);
extern _Bool only_space(conststring s);
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