From 3ea297bdc47848e80c3b5a7d2143aca8a982b7a5 Mon Sep 17 00:00:00 2001 From: Ian Romanick Date: Fri, 30 Sep 2011 14:58:29 -0700 Subject: [PATCH] mesa: Add string_to_uint_map facade class Signed-off-by: Ian Romanick Reviewed-by: Kenneth Graunke Acked-by: Paul Berry --- src/mesa/program/hash_table.h | 79 ++++++++++++++++++++++++- src/mesa/program/string_to_uint_map.cpp | 42 +++++++++++++ src/mesa/sources.mak | 3 +- 3 files changed, 122 insertions(+), 2 deletions(-) create mode 100644 src/mesa/program/string_to_uint_map.cpp diff --git a/src/mesa/program/hash_table.h b/src/mesa/program/hash_table.h index e7ab067a3bd..bfe221b242f 100644 --- a/src/mesa/program/hash_table.h +++ b/src/mesa/program/hash_table.h @@ -31,7 +31,13 @@ #ifndef HASH_TABLE_H #define HASH_TABLE_H +#include +#include +#include +#include + struct hash_table; +struct string_to_uint_map; typedef unsigned (*hash_func_t)(const void *key); typedef int (*hash_compare_func_t)(const void *key1, const void *key2); @@ -171,7 +177,78 @@ hash_table_call_foreach(struct hash_table *ht, void *closure), void *closure); +struct string_to_uint_map * +string_to_uint_map_ctor(); + +void +string_to_uint_map_dtor(struct string_to_uint_map *); + + #ifdef __cplusplus } -#endif + +/** + * Map from a string (name) to an unsigned integer value + * + * \note + * Because of the way this class interacts with the \c hash_table + * implementation, values of \c UINT_MAX cannot be stored in the map. + */ +struct string_to_uint_map { +public: + string_to_uint_map() + { + this->ht = hash_table_ctor(0, hash_table_string_hash, + hash_table_string_compare); + } + + ~string_to_uint_map() + { + hash_table_dtor(this->ht); + } + + /** + * Get the value associated with a particular key + * + * \return + * If \c key is found in the map, \c true is returned. Otherwise \c false + * is returned. + * + * \note + * If \c key is not found in the table, \c value is not modified. + */ + bool get(unsigned &value, const char *key) + { + const intptr_t v = + (intptr_t) hash_table_find(this->ht, (const void *) key); + + if (v == 0) + return false; + + value = (unsigned)(v - 1); + return true; + } + + void put(unsigned value, const char *key) + { + /* The low-level hash table structure returns NULL if key is not in the + * hash table. However, users of this map might want to store zero as a + * valid value in the table. Bias the value by +1 so that a + * user-specified zero is stored as 1. This enables ::get to tell the + * difference between a user-specified zero (returned as 1 by + * hash_table_find) and the key not in the table (returned as 0 by + * hash_table_find). + * + * The net effect is that we can't store UINT_MAX in the table. This is + * because UINT_MAX+1 = 0. + */ + assert(value != UINT_MAX); + hash_table_replace(ht, (void *) (intptr_t) (value + 1), key); + } + +private: + struct hash_table *ht; +}; + +#endif /* __cplusplus */ #endif /* HASH_TABLE_H */ diff --git a/src/mesa/program/string_to_uint_map.cpp b/src/mesa/program/string_to_uint_map.cpp new file mode 100644 index 00000000000..cfa73abe089 --- /dev/null +++ b/src/mesa/program/string_to_uint_map.cpp @@ -0,0 +1,42 @@ +/* + * Copyright © 2011 Intel Corporation + * + * 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 (including the next + * paragraph) 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 + * THE AUTHORS OR COPYRIGHT HOLDERS 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 string_to_uint_map.cpp + * \brief Dumb wrapprs so that C code can create and destroy maps. + * + * \author Ian Romanick + */ +#include "hash_table.h" + +extern "C" struct string_to_uint_map * +string_to_uint_map_ctor() +{ + return new string_to_uint_map; +} + +extern "C" void +string_to_uint_map_dtor(struct string_to_uint_map *map) +{ + delete map; +} diff --git a/src/mesa/sources.mak b/src/mesa/sources.mak index e473b49f3f0..f29213ec0d5 100644 --- a/src/mesa/sources.mak +++ b/src/mesa/sources.mak @@ -267,7 +267,8 @@ PROGRAM_SOURCES = \ SHADER_CXX_SOURCES = \ program/ir_to_mesa.cpp \ - program/sampler.cpp + program/sampler.cpp \ + program/string_to_uint_map.cpp ASM_C_SOURCES = \ x86/common_x86.c \ -- 2.30.2