131 lines
3.4 KiB
C
131 lines
3.4 KiB
C
/* ecore_value.c
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Copyright (C) 2001 Christopher Rosendahl <smugg@fatelabs.com>
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Nathan Ingersoll <ningerso@d.umn.edu>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to
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deal in the Software without restriction, including without limitation the
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rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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sell copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies of the Software and its documentation and acknowledgment shall be
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given in the documentation and software packages that this Software was
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used.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "Ecore.h"
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#include "Ecore_Data.h"
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#include "ecore_private.h"
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EAPI const unsigned int ecore_prime_table[] =
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{
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17, 31, 61, 127, 257, 509, 1021,
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2053, 4093, 8191, 16381, 32771, 65537, 131071, 262147, 524287, 1048573,
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2097143, 4194301, 8388617, 16777213
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};
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inline void
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ecore_print_warning(const char *function, const char *sparam)
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{
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fprintf(stderr, "***** Developer Warning ***** :\n"
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"\tThis program is calling:\n\n"
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"\t%s();\n\n"
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"\tWith the parameter:\n\n"
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"\t%s\n\n"
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"\tbeing NULL. Please fix your program.\n", function, sparam);
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fflush(stderr);
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}
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/**
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* Just casts the key to an unsigned int
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* @param key The key to return compute a hash value
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* @return The key cast to an unsigned int.
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*/
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EAPI unsigned int
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ecore_direct_hash(const void *key)
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{
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return ((unsigned int) key);
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}
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/**
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* Compute the hash value of a string
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* @param key A pointer to the string to compute a hash value
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* @return A computed hash value for @a key.
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*/
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EAPI unsigned int
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ecore_str_hash(const void *key)
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{
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int i;
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unsigned int mask;
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unsigned int value = 0;
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const char *k = key;
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if (!k)
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return 0;
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mask = (sizeof(unsigned int) * 8) - 1;
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for (i = 0; k[i] != '\0'; i++)
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{
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value ^= ((unsigned int) k[i] << ((i * 5) & mask));
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}
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return value;
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}
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/**
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* Perform a direct comparison of two keys' values
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* @param key1 The first key to compare
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* @param key2 The second key to compare
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* @return A strcmp style value to indicate the larger key
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*/
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EAPI int
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ecore_direct_compare(const void *key1, const void *key2)
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{
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unsigned int k1, k2;
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k1 = (unsigned int) key1;
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k2 = (unsigned int) key2;
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if (k1 > k2)
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return 1;
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if (k1 < k2)
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return -1;
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return 0;
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}
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/**
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* Perform a string comparison of two keys values
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* @param key1 The first key to compare
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* @param key2 The second key to compare
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* @return A strcmp style value to indicate the larger key
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*/
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EAPI int
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ecore_str_compare(const void *key1, const void *key2)
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{
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const char *k1, *k2;
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if (!key1 || !key2)
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return ecore_direct_compare(key1, key2);
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else if (key1 == key2)
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return 0;
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k1 = key1;
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k2 = key2;
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return strcmp(k1, k2);
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}
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