util.h

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/*
 * util.h
 *  
 * helper function header file
 * 
 * a Net::DNS like library for C
 * 
 * (c) NLnet Labs, 2004
 * 
 * See the file LICENSE for the license
 */
 
#ifndef _UTIL_H
#define _UTIL_H
 
#include <inttypes.h>
#include <sys/types.h>
#include <unistd.h>
#include <ldns/common.h>
#include <time.h>
#include <stdio.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define dprintf(X,Y) fprintf(stderr, (X), (Y))
/* #define      dprintf(X, Y)  */
 
#define LDNS_VERSION "1.8.3"
#define LDNS_REVISION ((1<<16)|(8<<8)|(3))
 
#ifdef S_SPLINT_S
#  define INLINE 
#else
#  ifdef SWIG
#    define INLINE static
#  else
#    define INLINE static inline
#  endif
#endif
 
#define LDNS_MALLOC(type)               LDNS_XMALLOC(type, 1)
 
#define LDNS_XMALLOC(type, count)       ((type *) malloc((count) * sizeof(type)))
 
#define LDNS_CALLOC(type, count)        ((type *) calloc((count), sizeof(type)))
 
#define LDNS_REALLOC(ptr, type)         LDNS_XREALLOC((ptr), type, 1)
 
#define LDNS_XREALLOC(ptr, type, count)                         \
        ((type *) realloc((ptr), (count) * sizeof(type)))
 
#define LDNS_FREE(ptr) \
        do { free((ptr)); (ptr) = NULL; } while (0)
 
#define LDNS_DEP     printf("DEPRECATED FUNCTION!\n");
 
/*
 * Copy data allowing for unaligned accesses in network byte order
 * (big endian).
 */
INLINE uint16_t
ldns_read_uint16(const void *src)
{
#ifdef ALLOW_UNALIGNED_ACCESSES
        return ntohs(*(const uint16_t *) src);
#else
        const uint8_t *p = (const uint8_t *) src;
        return ((uint16_t) p[0] << 8) | (uint16_t) p[1];
#endif
}
 
INLINE uint32_t
ldns_read_uint32(const void *src)
{
#ifdef ALLOW_UNALIGNED_ACCESSES
        return ntohl(*(const uint32_t *) src);
#else
        const uint8_t *p = (const uint8_t *) src;
        return (  ((uint32_t) p[0] << 24)
                | ((uint32_t) p[1] << 16)
                | ((uint32_t) p[2] << 8)
                |  (uint32_t) p[3]);
#endif
}
 
/*
 * Copy data allowing for unaligned accesses in network byte order
 * (big endian).
 */
INLINE void
ldns_write_uint16(void *dst, uint16_t data)
{
#ifdef ALLOW_UNALIGNED_ACCESSES
        * (uint16_t *) dst = htons(data);
#else
        uint8_t *p = (uint8_t *) dst;
        p[0] = (uint8_t) ((data >> 8) & 0xff);
        p[1] = (uint8_t) (data & 0xff);
#endif
}
 
INLINE void
ldns_write_uint32(void *dst, uint32_t data)
{
#ifdef ALLOW_UNALIGNED_ACCESSES
        * (uint32_t *) dst = htonl(data);
#else
        uint8_t *p = (uint8_t *) dst;
        p[0] = (uint8_t) ((data >> 24) & 0xff);
        p[1] = (uint8_t) ((data >> 16) & 0xff);
        p[2] = (uint8_t) ((data >> 8) & 0xff);
        p[3] = (uint8_t) (data & 0xff);
#endif
}
 
/* warning. */
INLINE void
ldns_write_uint64_as_uint48(void *dst, uint64_t data)
{
        uint8_t *p = (uint8_t *) dst;
        p[0] = (uint8_t) ((data >> 40) & 0xff);
        p[1] = (uint8_t) ((data >> 32) & 0xff);
        p[2] = (uint8_t) ((data >> 24) & 0xff);
        p[3] = (uint8_t) ((data >> 16) & 0xff);
        p[4] = (uint8_t) ((data >> 8) & 0xff);
        p[5] = (uint8_t) (data & 0xff);
}
 
 
struct ldns_schwartzian_compare_struct {
        void *original_object;
        void *transformed_object;
};
 
struct ldns_struct_lookup_table {
        int id;
        const char *name;
};
typedef struct ldns_struct_lookup_table ldns_lookup_table;
  
ldns_lookup_table *ldns_lookup_by_name(ldns_lookup_table table[],
                                       const char *name);
 
ldns_lookup_table *ldns_lookup_by_id(ldns_lookup_table table[], int id);
 
int ldns_get_bit(uint8_t bits[], size_t index);
 
 
int ldns_get_bit_r(uint8_t bits[], size_t index);
 
void ldns_set_bit(uint8_t *byte, int bit_nr, bool value);
 
/*@unused@*/
INLINE long
ldns_power(long a, long b) {
        long result = 1;
        while (b > 0) {
                if (b & 1) {
                        result *= a;
                        if (b == 1) {
                                return result;
                        }
                }
                a *= a;
                b /= 2;
        }
        return result;
}
 
int ldns_hexdigit_to_int(char ch);
 
char ldns_int_to_hexdigit(int ch);
 
int
ldns_hexstring_to_data(uint8_t *data, const char *str);
 
const char * ldns_version(void);
 
time_t ldns_mktime_from_utc(const struct tm *tm);
 
time_t mktime_from_utc(const struct tm *tm);
 
struct tm * ldns_serial_arithmetics_gmtime_r(int32_t time, time_t now, struct tm *result);
 
/* previously used wrong spelling */
#define ldns_serial_arithmitics_gmtime_r ldns_serial_arithmetics_gmtime_r
 
int ldns_init_random(FILE *fd, unsigned int size);
 
uint16_t ldns_get_random(void);
 
char *ldns_bubblebabble(uint8_t *data, size_t len);
 
 
INLINE time_t ldns_time(time_t *t) { return time(t); }
 
 
/*@unused@*/
INLINE size_t ldns_b32_ntop_calculate_size(size_t src_data_length)
{
        return src_data_length == 0 ? 0 : ((src_data_length - 1) / 5 + 1) * 8;
}
 
INLINE size_t ldns_b32_ntop_calculate_size_no_padding(size_t src_data_length)
{
        return ((src_data_length + 3) * 8 / 5) - 4;
}
 
int ldns_b32_ntop(const uint8_t* src_data, size_t src_data_length,
             char* target_text_buffer, size_t target_text_buffer_size);
 
int ldns_b32_ntop_extended_hex(const uint8_t* src_data, size_t src_data_length,
             char* target_text_buffer, size_t target_text_buffer_size);
 
#if ! LDNS_BUILD_CONFIG_HAVE_B32_NTOP
 
int b32_ntop(const uint8_t* src_data, size_t src_data_length,
             char* target_text_buffer, size_t target_text_buffer_size);
 
int b32_ntop_extended_hex(const uint8_t* src_data, size_t src_data_length,
             char* target_text_buffer, size_t target_text_buffer_size);
 
#endif /* ! LDNS_BUILD_CONFIG_HAVE_B32_NTOP */
 
 
/*@unused@*/
INLINE size_t ldns_b32_pton_calculate_size(size_t src_text_length)
{
        return src_text_length * 5 / 8;
}
 
int ldns_b32_pton(const char* src_text, size_t src_text_length,
                uint8_t* target_data_buffer, size_t target_data_buffer_size);
 
int ldns_b32_pton_extended_hex(const char* src_text, size_t src_text_length,
                uint8_t* target_data_buffer, size_t target_data_buffer_size);
 
#if ! LDNS_BUILD_CONFIG_HAVE_B32_PTON
 
int b32_pton(const char* src_text, size_t src_text_length,
                uint8_t* target_data_buffer, size_t target_data_buffer_size);
 
int b32_pton_extended_hex(const char* src_text, size_t src_text_length,
                uint8_t* target_data_buffer, size_t target_data_buffer_size);
 
#endif /* ! LDNS_BUILD_CONFIG_HAVE_B32_PTON */
 
 
#ifdef __cplusplus
}
#endif
 
#endif /* !_UTIL_H */