diff options
Diffstat (limited to 'src/mesa/slang/slang_utility.c')
| -rw-r--r-- | src/mesa/slang/slang_utility.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/src/mesa/slang/slang_utility.c b/src/mesa/slang/slang_utility.c new file mode 100644 index 0000000000..c1d57409a4 --- /dev/null +++ b/src/mesa/slang/slang_utility.c @@ -0,0 +1,228 @@ +/* + * Mesa 3-D graphics library + * Version: 6.5.3 + * + * Copyright (C) 2005-2007 Brian Paul All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN + * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +/** + * \file slang_utility.c + * slang utilities + * \author Michal Krol + */ + +#include "main/imports.h" +#include "slang_utility.h" +#include "slang_mem.h" + +char * +slang_string_concat (char *dst, const char *src) +{ + return strcpy (dst + strlen (dst), src); +} + + +/* slang_string */ + +GLvoid +slang_string_init (slang_string *self) +{ + self->data = NULL; + self->capacity = 0; + self->length = 0; + self->fail = GL_FALSE; +} + +GLvoid +slang_string_free (slang_string *self) +{ + if (self->data != NULL) + free(self->data); +} + +GLvoid +slang_string_reset (slang_string *self) +{ + self->length = 0; + self->fail = GL_FALSE; +} + +static GLboolean +grow (slang_string *self, GLuint size) +{ + if (self->fail) + return GL_FALSE; + if (size > self->capacity) { + /* do not overflow 32-bit range */ + assert (size < 0x80000000); + + self->data = (char *) (_mesa_realloc (self->data, self->capacity, size * 2)); + self->capacity = size * 2; + if (self->data == NULL) { + self->capacity = 0; + self->fail = GL_TRUE; + return GL_FALSE; + } + } + return GL_TRUE; +} + +GLvoid +slang_string_push (slang_string *self, const slang_string *str) +{ + if (str->fail) { + self->fail = GL_TRUE; + return; + } + if (grow (self, self->length + str->length)) { + memcpy (&self->data[self->length], str->data, str->length); + self->length += str->length; + } +} + +GLvoid +slang_string_pushc (slang_string *self, const char c) +{ + if (grow (self, self->length + 1)) { + self->data[self->length] = c; + self->length++; + } +} + +GLvoid +slang_string_pushs (slang_string *self, const char *cstr, GLuint len) +{ + if (grow (self, self->length + len)) { + memcpy (&self->data[self->length], cstr, len); + self->length += len; + } +} + +GLvoid +slang_string_pushi (slang_string *self, GLint i) +{ + char buffer[12]; + + _mesa_snprintf (buffer, sizeof(buffer), "%d", i); + slang_string_pushs (self, buffer, strlen (buffer)); +} + +const char * +slang_string_cstr (slang_string *self) +{ + if (grow (self, self->length + 1)) + self->data[self->length] = '\0'; + return self->data; +} + +/* slang_atom_pool */ + +void +slang_atom_pool_construct(slang_atom_pool * pool) +{ + GLuint i; + + for (i = 0; i < SLANG_ATOM_POOL_SIZE; i++) + pool->entries[i] = NULL; +} + +void +slang_atom_pool_destruct (slang_atom_pool * pool) +{ + GLuint i; + + for (i = 0; i < SLANG_ATOM_POOL_SIZE; i++) { + slang_atom_entry * entry; + + entry = pool->entries[i]; + while (entry != NULL) { + slang_atom_entry *next = entry->next; + _slang_free(entry->id); + _slang_free(entry); + entry = next; + } + } +} + +/* + * Search the atom pool for an atom with a given name. + * If atom is not found, create and add it to the pool. + * Returns ATOM_NULL if the atom was not found and the function failed + * to create a new atom. + */ +slang_atom +slang_atom_pool_atom(slang_atom_pool * pool, const char * id) +{ + GLuint hash; + const char * p = id; + slang_atom_entry ** entry; + + /* Hash a given string to a number in the range [0, ATOM_POOL_SIZE). */ + hash = 0; + while (*p != '\0') { + GLuint g; + + hash = (hash << 4) + (GLuint) (*p++); + g = hash & 0xf0000000; + if (g != 0) + hash ^= g >> 24; + hash &= ~g; + } + hash %= SLANG_ATOM_POOL_SIZE; + + /* Now the hash points to a linked list of atoms with names that + * have the same hash value. Search the linked list for a given + * name. + */ + entry = &pool->entries[hash]; + while (*entry != NULL) { + /* If the same, return the associated atom. */ + if (slang_string_compare((**entry).id, id) == 0) + return (slang_atom) (**entry).id; + /* Grab the next atom in the linked list. */ + entry = &(**entry).next; + } + + /* Okay, we have not found an atom. Create a new entry for it. + * Note that the <entry> points to the last entry's <next> field. + */ + *entry = (slang_atom_entry *) _slang_alloc(sizeof(slang_atom_entry)); + if (*entry == NULL) + return SLANG_ATOM_NULL; + + /* Initialize a new entry. Because we'll need the actual name of + * the atom, we use the pointer to this string as an actual atom's + * value. + */ + (**entry).next = NULL; + (**entry).id = _slang_strdup(id); + if ((**entry).id == NULL) + return SLANG_ATOM_NULL; + return (slang_atom) (**entry).id; +} + +/** + * Return the name of a given atom. + */ +const char * +slang_atom_pool_id(slang_atom_pool * pool, slang_atom atom) +{ + return (const char *) (atom); +} |