X-Git-Url: http://de.git.xonotic.org/?p=xonotic%2Fgmqcc.git;a=blobdiff_plain;f=util.c;h=12cfb3e06863bce3090fb1900d3f7af47c6584c6;hp=f4dbfc4b21a65d759bbc2c81da800b6c1be9b1cb;hb=f008cc257d57d28fa291b064c25ef9eac6a2be16;hpb=2382fdee507e20d5ecc050b2cab099505c2ed0e6 diff --git a/util.c b/util.c index f4dbfc4..12cfb3e 100644 --- a/util.c +++ b/util.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2012 + * Copyright (C) 2012, 2013 * Dale Weiler * Wolfgang Bumiller * @@ -21,180 +21,42 @@ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ -#include -#include +#define GMQCC_PLATFORM_HEADER #include "gmqcc.h" - -/* TODO: remove globals ... */ -uint64_t mem_ab = 0; -uint64_t mem_db = 0; -uint64_t mem_at = 0; -uint64_t mem_dt = 0; - -struct memblock_t { - const char *file; - unsigned int line; - size_t byte; - struct memblock_t *next; - struct memblock_t *prev; -}; - -static struct memblock_t *mem_start = NULL; - -void *util_memory_a(size_t byte, unsigned int line, const char *file) { - struct memblock_t *info = (struct memblock_t*)malloc(sizeof(struct memblock_t) + byte); - void *data = (void*)(info+1); - if (!info) return NULL; - info->line = line; - info->byte = byte; - info->file = file; - info->prev = NULL; - info->next = mem_start; - if (mem_start) - mem_start->prev = info; - mem_start = info; - - util_debug("MEM", "allocation: % 8u (bytes) address 0x%08X @ %s:%u\n", byte, data, file, line); - mem_at++; - mem_ab += info->byte; - - return data; -} - -void util_memory_d(void *ptrn, unsigned int line, const char *file) { - struct memblock_t *info = NULL; - - if (!ptrn) return; - info = ((struct memblock_t*)ptrn - 1); - - util_debug("MEM", "released: % 8u (bytes) address 0x%08X @ %s:%u\n", info->byte, ptrn, file, line); - mem_db += info->byte; - mem_dt++; - - if (info->prev) - info->prev->next = info->next; - if (info->next) - info->next->prev = info->prev; - if (info == mem_start) - mem_start = info->next; - - free(info); -} - -void *util_memory_r(void *ptrn, size_t byte, unsigned int line, const char *file) { - struct memblock_t *oldinfo = NULL; - - struct memblock_t *newinfo; - - if (!ptrn) - return util_memory_a(byte, line, file); - if (!byte) { - util_memory_d(ptrn, line, file); - return NULL; - } - - oldinfo = ((struct memblock_t*)ptrn - 1); - newinfo = ((struct memblock_t*)malloc(sizeof(struct memblock_t) + byte)); - - util_debug("MEM", "reallocation: % 8u -> %u (bytes) address 0x%08X -> 0x%08X @ %s:%u\n", oldinfo->byte, byte, ptrn, (void*)(newinfo+1), file, line); - - /* new data */ - if (!newinfo) { - util_memory_d(oldinfo+1, line, file); - return NULL; - } - - /* copy old */ - memcpy(newinfo+1, oldinfo+1, oldinfo->byte); - - /* free old */ - if (oldinfo->prev) - oldinfo->prev->next = oldinfo->next; - if (oldinfo->next) - oldinfo->next->prev = oldinfo->prev; - if (oldinfo == mem_start) - mem_start = oldinfo->next; - - /* fill info */ - newinfo->line = line; - newinfo->byte = byte; - newinfo->file = file; - newinfo->prev = NULL; - newinfo->next = mem_start; - if (mem_start) - mem_start->prev = newinfo; - mem_start = newinfo; - - mem_ab -= oldinfo->byte; - mem_ab += newinfo->byte; - - free(oldinfo); - - return newinfo+1; -} - -void util_meminfo() { - struct memblock_t *info; - - if (!opts.memchk) - return; - - for (info = mem_start; info; info = info->next) { - util_debug("MEM", "lost: % 8u (bytes) at %s:%u\n", - info->byte, - info->file, - info->line); - } - - util_debug("MEM", "Memory information:\n\ - Total allocations: %llu\n\ - Total deallocations: %llu\n\ - Total allocated: %llu (bytes)\n\ - Total deallocated: %llu (bytes)\n\ - Leaks found: lost %llu (bytes) in %d allocations\n", - mem_at, mem_dt, - mem_ab, mem_db, - (mem_ab - mem_db), - (mem_at - mem_dt) - ); -} +#include "platform.h" /* - * Some string utility functions, because strdup uses malloc, and we want - * to track all memory (without replacing malloc). + * Initially this was handled with a table in the gmqcc.h header, but + * much to my surprise the contents of the table was duplicated for + * each translation unit, causing all these strings to be duplicated + * for every .c file it was included into. This method culls back on + * it. This is a 'utility' function because the executor also depends + * on this for disassembled byte-code. */ -char *util_strdup(const char *s) { - size_t len = 0; - char *ptr = NULL; - - if (!s) - return NULL; - - if ((len = strlen(s)) && (ptr = (char*)mem_a(len+1))) { - memcpy(ptr, s, len); - ptr[len] = '\0'; - } - return ptr; -} - -void util_debug(const char *area, const char *ms, ...) { - va_list va; - if (!opts.debug) - return; - - if (!strcmp(area, "MEM") && !opts.memchk) - return; - - va_start(va, ms); - con_out ("[%s] ", area); - con_vout(ms, va); - va_end (va); -} +const char *util_instr_str[VINSTR_END] = { + "DONE", "MUL_F", "MUL_V", "MUL_FV", + "MUL_VF", "DIV_F", "ADD_F", "ADD_V", + "SUB_F", "SUB_V", "EQ_F", "EQ_V", + "EQ_S", "EQ_E", "EQ_FNC", "NE_F", + "NE_V", "NE_S", "NE_E", "NE_FNC", + "LE", "GE", "LT", "GT", + "LOAD_F", "LOAD_V", "LOAD_S", "LOAD_ENT", + "LOAD_FLD", "LOAD_FNC", "ADDRESS", "STORE_F", + "STORE_V", "STORE_S", "STORE_ENT", "STORE_FLD", + "STORE_FNC", "STOREP_F", "STOREP_V", "STOREP_S", + "STOREP_ENT", "STOREP_FLD", "STOREP_FNC", "RETURN", + "NOT_F", "NOT_V", "NOT_S", "NOT_ENT", + "NOT_FNC", "IF", "IFNOT", "CALL0", + "CALL1", "CALL2", "CALL3", "CALL4", + "CALL5", "CALL6", "CALL7", "CALL8", + "STATE", "GOTO", "AND", "OR", + "BITAND", "BITOR" +}; /* * only required if big endian .. otherwise no need to swap * data. - */ + */ #if PLATFORM_BYTE_ORDER == GMQCC_BYTE_ORDER_BIG static GMQCC_INLINE void util_swap16(uint16_t *d, size_t l) { while (l--) { @@ -257,7 +119,7 @@ void util_endianswap(void *_data, size_t length, unsigned int typesize) { util_swap64((uint32_t*)_data, length>>3); return; - default: abort(); /* please blow the fuck up! */ + default: exit(EXIT_FAILURE); /* please blow the fuck up! */ } # endif #endif @@ -271,7 +133,7 @@ void util_endianswap(void *_data, size_t length, unsigned int typesize) { * well as (but not limited to the idea of reflected versions) where the final register * value becomes reversed, and finally weather the value itself is used to XOR the final * register value. AS such you can already imagine how painfully annoying CRCs are, - * of course we stand to target Quake, which expects it's certian set of rules for proper + * of course we stand to target Quake, which expects it's certain set of rules for proper * calculation of a CRC. * * In most traditional CRC algorithms on uses a reflected table driven method where a value @@ -286,255 +148,174 @@ void util_endianswap(void *_data, size_t length, unsigned int typesize) { */ static const uint16_t util_crc16_table[] = { - 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, - 0x60C6, 0x70E7, 0x8108, 0x9129, 0xA14A, 0xB16B, - 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF, 0x1231, 0x0210, - 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6, - 0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, - 0xF3FF, 0xE3DE, 0x2462, 0x3443, 0x0420, 0x1401, - 0x64E6, 0x74C7, 0x44A4, 0x5485, 0xA56A, 0xB54B, - 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D, - 0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, - 0x5695, 0x46B4, 0xB75B, 0xA77A, 0x9719, 0x8738, - 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC, 0x48C4, 0x58E5, - 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823, - 0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, - 0xA90A, 0xB92B, 0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, - 0x1A71, 0x0A50, 0x3A33, 0x2A12, 0xDBFD, 0xCBDC, - 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A, - 0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, - 0x0C60, 0x1C41, 0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, - 0xAD2A, 0xBD0B, 0x8D68, 0x9D49, 0x7E97, 0x6EB6, - 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70, - 0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, - 0x9F59, 0x8F78, 0x9188, 0x81A9, 0xB1CA, 0xA1EB, - 0xD10C, 0xC12D, 0xF14E, 0xE16F, 0x1080, 0x00A1, - 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067, - 0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, - 0xE37F, 0xF35E, 0x02B1, 0x1290, 0x22F3, 0x32D2, - 0x4235, 0x5214, 0x6277, 0x7256, 0xB5EA, 0xA5CB, - 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D, - 0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, - 0x5424, 0x4405, 0xA7DB, 0xB7FA, 0x8799, 0x97B8, - 0xE75F, 0xF77E, 0xC71D, 0xD73C, 0x26D3, 0x36F2, - 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634, - 0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, - 0xB98A, 0xA9AB, 0x5844, 0x4865, 0x7806, 0x6827, - 0x18C0, 0x08E1, 0x3882, 0x28A3, 0xCB7D, 0xDB5C, - 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A, - 0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, - 0x2AB3, 0x3A92, 0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, - 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9, 0x7C26, 0x6C07, - 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1, - 0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, - 0x8FD9, 0x9FF8, 0x6E17, 0x7E36, 0x4E55, 0x5E74, - 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0 + 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7, 0x8108, + 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF, 0x1231, 0x0210, + 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6, 0x9339, 0x8318, 0xB37B, + 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE, 0x2462, 0x3443, 0x0420, 0x1401, + 0x64E6, 0x74C7, 0x44A4, 0x5485, 0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, + 0xF5CF, 0xC5AC, 0xD58D, 0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, + 0x5695, 0x46B4, 0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, + 0xC7BC, 0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823, + 0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B, 0x5AF5, + 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12, 0xDBFD, 0xCBDC, + 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A, 0x6CA6, 0x7C87, 0x4CE4, + 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41, 0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, + 0xAD2A, 0xBD0B, 0x8D68, 0x9D49, 0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, + 0x2E32, 0x1E51, 0x0E70, 0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, + 0x9F59, 0x8F78, 0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, + 0xE16F, 0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067, + 0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E, 0x02B1, + 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256, 0xB5EA, 0xA5CB, + 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D, 0x34E2, 0x24C3, 0x14A0, + 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, 0xA7DB, 0xB7FA, 0x8799, 0x97B8, + 0xE75F, 0xF77E, 0xC71D, 0xD73C, 0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, + 0x7676, 0x4615, 0x5634, 0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, + 0xB98A, 0xA9AB, 0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, + 0x28A3, 0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A, + 0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92, 0xFD2E, + 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9, 0x7C26, 0x6C07, + 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1, 0xEF1F, 0xFF3E, 0xCF5D, + 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8, 0x6E17, 0x7E36, 0x4E55, 0x5E74, + 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0 }; /* Non - Reflected */ uint16_t util_crc16(uint16_t current, const char *k, size_t len) { register uint16_t h = current; - for (; len; --len, ++k) + for (; len; --len, ++k) h = util_crc16_table[(h>>8)^((unsigned char)*k)]^(h<<8); return h; } -/* Reflective Varation (for reference) */ +/* Reflective Variation (for reference) */ #if 0 uint16_t util_crc16(const char *k, int len, const short clamp) { register uint16_t h= (uint16_t)0xFFFFFFFF; - for (; len; --len, ++k) + for (; len; --len, ++k) h = util_crc16_table[(h^((unsigned char)*k))&0xFF]^(h>>8); - return (~h)%clamp; + return (~h)%clamp; } #endif -size_t util_strtocmd(const char *in, char *out, size_t outsz) { +/* + * modifier is the match to make and the transposition from it, while add is the upper-value that determines the + * transposition from uppercase to lower case. + */ +static GMQCC_INLINE size_t util_strtransform(const char *in, char *out, size_t outsz, const char *mod, int add) { size_t sz = 1; - for (; *in && sz < outsz; ++in, ++out, ++sz) - *out = (*in == '-') ? '_' : (isalpha(*in) && !isupper(*in)) ? *in + 'A' - 'a': *in; + for (; *in && sz < outsz; ++in, ++out, ++sz) { + *out = (*in == mod[0]) + ? mod[1] + : (util_isalpha(*in) && ((add > 0) ? util_isupper(*in) : !util_isupper(*in))) + ? *in + add + : *in; + } *out = 0; return sz-1; } +size_t util_strtocmd(const char *in, char *out, size_t outsz) { + return util_strtransform(in, out, outsz, "-_", 'A'-'a'); +} size_t util_strtononcmd(const char *in, char *out, size_t outsz) { - size_t sz = 1; - for (; *in && sz < outsz; ++in, ++out, ++sz) - *out = (*in == '_') ? '-' : (isalpha(*in) && isupper(*in)) ? *in + 'a' - 'A' : *in; - *out = 0; - return sz-1; + return util_strtransform(in, out, outsz, "_-", 'a'-'A'); } - -/* TODO: rewrite ... when I redo the ve cleanup */ -void _util_vec_grow(void **a, size_t i, size_t s) { - vector_t *d = vec_meta(*a); - size_t m = *a ? 2 * d->allocated +i : i+1; - void *p = mem_r((*a ? d : NULL), s * m + sizeof(vector_t)); - - if (!*a) - ((vector_t*)p)->used = 0; - *a = (vector_t*)p + 1; - - vec_meta(*a)->allocated = m; +size_t util_optimizationtostr(const char *in, char *out, size_t outsz) { + return util_strtransform(in, out, outsz, "_ ", 'a'-'A'); } -/* - * Hash table for generic data, based on dynamic memory allocations - * all around. This is the internal interface, please look for - * EXPOSED INTERFACE comment below - */ -typedef struct hash_node_t { - char *key; /* the key for this node in table */ - void *value; /* pointer to the data as void* */ - struct hash_node_t *next; /* next node (linked list) */ -} hash_node_t; - -GMQCC_INLINE size_t util_hthash(hash_table_t *ht, const char *key) { - const uint32_t mix = 0x5BD1E995; - const uint32_t rot = 24; - size_t size = strlen(key); - uint32_t hash = 0x1EF0 /* LICRC TAB */ ^ size; - uint32_t alias = 0; - const unsigned char *data = (const unsigned char*)key; - - while (size >= 4) { - alias = *(uint32_t*)data; - - alias *= mix; - alias ^= alias >> rot; - alias *= mix; - - hash *= mix; - hash ^= alias; - - data += 4; - size -= 4; - } - - switch (size) { - case 3: hash ^= data[2] << 16; - case 2: hash ^= data[1] << 8; - case 1: hash ^= data[0]; - hash *= mix; - } +int util_snprintf(char *str, size_t size, const char *fmt, ...) { + va_list arg; + int ret; - hash ^= hash >> 13; - hash *= mix; - hash ^= hash >> 15; + va_start(arg, fmt); + ret = platform_vsnprintf(str, size, fmt, arg); + va_end(arg); - return (size_t) (hash % ht->size); + return ret; } -hash_node_t *_util_htnewpair(const char *key, void *value) { - hash_node_t *node; - if (!(node = (hash_node_t*)mem_a(sizeof(hash_node_t)))) - return NULL; - - if (!(node->key = util_strdup(key))) { - mem_d(node); - return NULL; - } +int util_asprintf(char **ret, const char *fmt, ...) { + va_list args; + int read; - node->value = value; - node->next = NULL; + va_start(args, fmt); + read = platform_vasprintf(ret, fmt, args); + va_end (args); - return node; + return read; } -/* - * EXPOSED INTERFACE for the hashtable implementation - * util_htnew(size) -- to make a new hashtable - * util_htset(table, key, value, sizeof(value)) -- to set something in the table - * util_htget(table, key) -- to get something from the table - * util_htdel(table) -- to delete the table - */ -hash_table_t *util_htnew(size_t size) { - hash_table_t *hashtable = NULL; - if (size < 1) - return NULL; - - if (!(hashtable = (hash_table_t*)mem_a(sizeof(hash_table_t)))) - return NULL; +int util_sscanf(const char *str, const char *format, ...) { + va_list args; + int read; - if (!(hashtable->table = (hash_node_t**)mem_a(sizeof(hash_node_t*) * size))) { - mem_d(hashtable); - return NULL; - } + va_start(args, format); + read = platform_vsscanf(str, format, args); + va_end(args); - hashtable->size = size; - memset(hashtable->table, 0, sizeof(hash_node_t*) * size); + return read; +} - return hashtable; +char *util_strncpy(char *dest, const char *src, size_t n) { + return platform_strncpy(dest, src, n); +} +char *util_strncat(char *dest, const char *src, size_t n) { + return platform_strncat(dest, src, n); +} +char *util_strcat(char *dest, const char *src) { + return platform_strcat(dest, src); +} +const char *util_strerror(int err) { + return platform_strerror(err); } -void util_htseth(hash_table_t *ht, const char *key, size_t bin, void *value) { - hash_node_t *newnode = NULL; - hash_node_t *next = NULL; - hash_node_t *last = NULL; - - next = ht->table[bin]; - - while (next && next->key && strcmp(key, next->key) > 0) - last = next, next = next->next; - - /* already in table, do a replace */ - if (next && next->key && strcmp(key, next->key) == 0) { - next->value = value; - } else { - /* not found, grow a pair man :P */ - newnode = _util_htnewpair(key, value); - if (next == ht->table[bin]) { - newnode->next = next; - ht->table[bin] = newnode; - } else if (!next) { - last->next = newnode; - } else { - newnode->next = next; - last->next = newnode; - } - } +const struct tm *util_localtime(const time_t *timer) { + return platform_localtime(timer); +} +const char *util_ctime(const time_t *timer) { + return platform_ctime(timer); } -void util_htset(hash_table_t *ht, const char *key, void *value) { - util_htseth(ht, key, util_hthash(ht, key), value); +bool util_isatty(fs_file_t *file) { + if (file == (fs_file_t*)stdout) return !!platform_isatty(STDOUT_FILENO); + if (file == (fs_file_t*)stderr) return !!platform_isatty(STDERR_FILENO); + return false; } -void *util_htgeth(hash_table_t *ht, const char *key, size_t bin) { - hash_node_t *pair = ht->table[bin]; +/* + * A small noncryptographic PRNG based on: + * http://burtleburtle.net/bob/rand/smallprng.html + */ +static uint32_t util_rand_state[4] = { + 0xF1EA5EED, 0x00000000, + 0x00000000, 0x00000000 +}; + +#define util_rand_rot(X, Y) (((X)<<(Y))|((X)>>(32-(Y)))) - while (pair && pair->key && strcmp(key, pair->key) > 0) - pair = pair->next; +uint32_t util_rand() { + uint32_t last; - if (!pair || !pair->key || strcmp(key, pair->key) != 0) - return NULL; + last = util_rand_state[0] - util_rand_rot(util_rand_state[1], 27); + util_rand_state[0] = util_rand_state[1] ^ util_rand_rot(util_rand_state[2], 17); + util_rand_state[1] = util_rand_state[2] + util_rand_state[3]; + util_rand_state[2] = util_rand_state[3] + last; + util_rand_state[3] = util_rand_state[0] + last; - return pair->value; + return util_rand_state[3]; } -void *util_htget(hash_table_t *ht, const char *key) { - return util_htgeth(ht, key, util_hthash(ht, key)); -} +#undef util_rand_rot -/* - * Free all allocated data in a hashtable, this is quite the amount - * of work. - */ -void util_htdel(hash_table_t *ht) { - size_t i = 0; - for (; i < ht->size; i++) { - hash_node_t *n = ht->table[i]; - hash_node_t *p; - - /* free in list */ - while (n) { - if (n->key) - mem_d(n->key); - p = n; - n = n->next; - mem_d(p); - } +void util_seed(uint32_t value) { + size_t i; - } - /* free table */ - mem_d(ht->table); - mem_d(ht); + util_rand_state[0] = 0xF1EA5EED; + util_rand_state[1] = value; + util_rand_state[2] = value; + util_rand_state[3] = value; + + for (i = 0; i < 20; ++i) + (void)util_rand(); } +