compiler: Bring over glsl compiler from alchemist-10.2.6+steamos-LunarG-1.1
diff --git a/icd/intel/compiler/shader/ralloc.c b/icd/intel/compiler/shader/ralloc.c
new file mode 100644
index 0000000..36bc61f
--- /dev/null
+++ b/icd/intel/compiler/shader/ralloc.c
@@ -0,0 +1,492 @@
+/*
+ * Copyright © 2010 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.
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+
+/* Android defines SIZE_MAX in limits.h, instead of the standard stdint.h */
+#ifdef ANDROID
+#include <limits.h>
+#endif
+
+/* Some versions of MinGW are missing _vscprintf's declaration, although they
+ * still provide the symbol in the import library. */
+#ifdef __MINGW32__
+_CRTIMP int _vscprintf(const char *format, va_list argptr);
+#endif
+
+#include "ralloc.h"
+
+#ifndef va_copy
+#ifdef __va_copy
+#define va_copy(dest, src) __va_copy((dest), (src))
+#else
+#define va_copy(dest, src) (dest) = (src)
+#endif
+#endif
+
+#define CANARY 0x5A1106
+
+struct ralloc_header
+{
+#ifdef DEBUG
+ /* A canary value used to determine whether a pointer is ralloc'd. */
+ unsigned canary;
+#endif
+
+ struct ralloc_header *parent;
+
+ /* The first child (head of a linked list) */
+ struct ralloc_header *child;
+
+ /* Linked list of siblings */
+ struct ralloc_header *prev;
+ struct ralloc_header *next;
+
+ void (*destructor)(void *);
+};
+
+typedef struct ralloc_header ralloc_header;
+
+static void unlink_block(ralloc_header *info);
+static void unsafe_free(ralloc_header *info);
+
+static ralloc_header *
+get_header(const void *ptr)
+{
+ ralloc_header *info = (ralloc_header *) (((char *) ptr) -
+ sizeof(ralloc_header));
+#ifdef DEBUG
+ assert(info->canary == CANARY);
+#endif
+ return info;
+}
+
+#define PTR_FROM_HEADER(info) (((char *) info) + sizeof(ralloc_header))
+
+static void
+add_child(ralloc_header *parent, ralloc_header *info)
+{
+ if (parent != NULL) {
+ info->parent = parent;
+ info->next = parent->child;
+ parent->child = info;
+
+ if (info->next != NULL)
+ info->next->prev = info;
+ }
+}
+
+void *
+ralloc_context(const void *ctx)
+{
+ return ralloc_size(ctx, 0);
+}
+
+void *
+ralloc_size(const void *ctx, size_t size)
+{
+ void *block = calloc(1, size + sizeof(ralloc_header));
+ ralloc_header *info;
+ ralloc_header *parent;
+
+ if (unlikely(block == NULL))
+ return NULL;
+ info = (ralloc_header *) block;
+ parent = ctx != NULL ? get_header(ctx) : NULL;
+
+ add_child(parent, info);
+
+#ifdef DEBUG
+ info->canary = CANARY;
+#endif
+
+ return PTR_FROM_HEADER(info);
+}
+
+void *
+rzalloc_size(const void *ctx, size_t size)
+{
+ void *ptr = ralloc_size(ctx, size);
+ if (likely(ptr != NULL))
+ memset(ptr, 0, size);
+ return ptr;
+}
+
+/* helper function - assumes ptr != NULL */
+static void *
+resize(void *ptr, size_t size)
+{
+ ralloc_header *child, *old, *info;
+
+ old = get_header(ptr);
+ info = realloc(old, size + sizeof(ralloc_header));
+
+ if (info == NULL)
+ return NULL;
+
+ /* Update parent and sibling's links to the reallocated node. */
+ if (info != old && info->parent != NULL) {
+ if (info->parent->child == old)
+ info->parent->child = info;
+
+ if (info->prev != NULL)
+ info->prev->next = info;
+
+ if (info->next != NULL)
+ info->next->prev = info;
+ }
+
+ /* Update child->parent links for all children */
+ for (child = info->child; child != NULL; child = child->next)
+ child->parent = info;
+
+ return PTR_FROM_HEADER(info);
+}
+
+void *
+reralloc_size(const void *ctx, void *ptr, size_t size)
+{
+ if (unlikely(ptr == NULL))
+ return ralloc_size(ctx, size);
+
+ assert(ralloc_parent(ptr) == ctx);
+ return resize(ptr, size);
+}
+
+void *
+ralloc_array_size(const void *ctx, size_t size, unsigned count)
+{
+ if (count > SIZE_MAX/size)
+ return NULL;
+
+ return ralloc_size(ctx, size * count);
+}
+
+void *
+rzalloc_array_size(const void *ctx, size_t size, unsigned count)
+{
+ if (count > SIZE_MAX/size)
+ return NULL;
+
+ return rzalloc_size(ctx, size * count);
+}
+
+void *
+reralloc_array_size(const void *ctx, void *ptr, size_t size, unsigned count)
+{
+ if (count > SIZE_MAX/size)
+ return NULL;
+
+ return reralloc_size(ctx, ptr, size * count);
+}
+
+void
+ralloc_free(void *ptr)
+{
+ ralloc_header *info;
+
+ if (ptr == NULL)
+ return;
+
+ info = get_header(ptr);
+ unlink_block(info);
+ unsafe_free(info);
+}
+
+static void
+unlink_block(ralloc_header *info)
+{
+ /* Unlink from parent & siblings */
+ if (info->parent != NULL) {
+ if (info->parent->child == info)
+ info->parent->child = info->next;
+
+ if (info->prev != NULL)
+ info->prev->next = info->next;
+
+ if (info->next != NULL)
+ info->next->prev = info->prev;
+ }
+ info->parent = NULL;
+ info->prev = NULL;
+ info->next = NULL;
+}
+
+static void
+unsafe_free(ralloc_header *info)
+{
+ /* Recursively free any children...don't waste time unlinking them. */
+ ralloc_header *temp;
+ while (info->child != NULL) {
+ temp = info->child;
+ info->child = temp->next;
+ unsafe_free(temp);
+ }
+
+ /* Free the block itself. Call the destructor first, if any. */
+ if (info->destructor != NULL)
+ info->destructor(PTR_FROM_HEADER(info));
+
+ free(info);
+}
+
+void
+ralloc_steal(const void *new_ctx, void *ptr)
+{
+ ralloc_header *info, *parent;
+
+ if (unlikely(ptr == NULL))
+ return;
+
+ info = get_header(ptr);
+ parent = get_header(new_ctx);
+
+ unlink_block(info);
+
+ add_child(parent, info);
+}
+
+void *
+ralloc_parent(const void *ptr)
+{
+ ralloc_header *info;
+
+ if (unlikely(ptr == NULL))
+ return NULL;
+
+ info = get_header(ptr);
+ return info->parent ? PTR_FROM_HEADER(info->parent) : NULL;
+}
+
+static void *autofree_context = NULL;
+
+static void
+autofree(void)
+{
+ ralloc_free(autofree_context);
+}
+
+void *
+ralloc_autofree_context(void)
+{
+ if (unlikely(autofree_context == NULL)) {
+ autofree_context = ralloc_context(NULL);
+ atexit(autofree);
+ }
+ return autofree_context;
+}
+
+void
+ralloc_set_destructor(const void *ptr, void(*destructor)(void *))
+{
+ ralloc_header *info = get_header(ptr);
+ info->destructor = destructor;
+}
+
+char *
+ralloc_strdup(const void *ctx, const char *str)
+{
+ size_t n;
+ char *ptr;
+
+ if (unlikely(str == NULL))
+ return NULL;
+
+ n = strlen(str);
+ ptr = ralloc_array(ctx, char, n + 1);
+ memcpy(ptr, str, n);
+ ptr[n] = '\0';
+ return ptr;
+}
+
+char *
+ralloc_strndup(const void *ctx, const char *str, size_t max)
+{
+ size_t n;
+ char *ptr;
+
+ if (unlikely(str == NULL))
+ return NULL;
+
+ n = strlen(str);
+ if (n > max)
+ n = max;
+
+ ptr = ralloc_array(ctx, char, n + 1);
+ memcpy(ptr, str, n);
+ ptr[n] = '\0';
+ return ptr;
+}
+
+/* helper routine for strcat/strncat - n is the exact amount to copy */
+static bool
+cat(char **dest, const char *str, size_t n)
+{
+ char *both;
+ size_t existing_length;
+ assert(dest != NULL && *dest != NULL);
+
+ existing_length = strlen(*dest);
+ both = resize(*dest, existing_length + n + 1);
+ if (unlikely(both == NULL))
+ return false;
+
+ memcpy(both + existing_length, str, n);
+ both[existing_length + n] = '\0';
+
+ *dest = both;
+ return true;
+}
+
+
+bool
+ralloc_strcat(char **dest, const char *str)
+{
+ return cat(dest, str, strlen(str));
+}
+
+bool
+ralloc_strncat(char **dest, const char *str, size_t n)
+{
+ /* Clamp n to the string length */
+ size_t str_length = strlen(str);
+ if (str_length < n)
+ n = str_length;
+
+ return cat(dest, str, n);
+}
+
+char *
+ralloc_asprintf(const void *ctx, const char *fmt, ...)
+{
+ char *ptr;
+ va_list args;
+ va_start(args, fmt);
+ ptr = ralloc_vasprintf(ctx, fmt, args);
+ va_end(args);
+ return ptr;
+}
+
+/* Return the length of the string that would be generated by a printf-style
+ * format and argument list, not including the \0 byte.
+ */
+static size_t
+printf_length(const char *fmt, va_list untouched_args)
+{
+ int size;
+ char junk;
+
+ /* Make a copy of the va_list so the original caller can still use it */
+ va_list args;
+ va_copy(args, untouched_args);
+
+#ifdef _WIN32
+ /* We need to use _vcsprintf to calculate the size as vsnprintf returns -1
+ * if the number of characters to write is greater than count.
+ */
+ size = _vscprintf(fmt, args);
+ (void)junk;
+#else
+ size = vsnprintf(&junk, 1, fmt, args);
+#endif
+ assert(size >= 0);
+
+ va_end(args);
+
+ return size;
+}
+
+char *
+ralloc_vasprintf(const void *ctx, const char *fmt, va_list args)
+{
+ size_t size = printf_length(fmt, args) + 1;
+
+ char *ptr = ralloc_size(ctx, size);
+ if (ptr != NULL)
+ vsnprintf(ptr, size, fmt, args);
+
+ return ptr;
+}
+
+bool
+ralloc_asprintf_append(char **str, const char *fmt, ...)
+{
+ bool success;
+ va_list args;
+ va_start(args, fmt);
+ success = ralloc_vasprintf_append(str, fmt, args);
+ va_end(args);
+ return success;
+}
+
+bool
+ralloc_vasprintf_append(char **str, const char *fmt, va_list args)
+{
+ size_t existing_length;
+ assert(str != NULL);
+ existing_length = *str ? strlen(*str) : 0;
+ return ralloc_vasprintf_rewrite_tail(str, &existing_length, fmt, args);
+}
+
+bool
+ralloc_asprintf_rewrite_tail(char **str, size_t *start, const char *fmt, ...)
+{
+ bool success;
+ va_list args;
+ va_start(args, fmt);
+ success = ralloc_vasprintf_rewrite_tail(str, start, fmt, args);
+ va_end(args);
+ return success;
+}
+
+bool
+ralloc_vasprintf_rewrite_tail(char **str, size_t *start, const char *fmt,
+ va_list args)
+{
+ size_t new_length;
+ char *ptr;
+
+ assert(str != NULL);
+
+ if (unlikely(*str == NULL)) {
+ // Assuming a NULL context is probably bad, but it's expected behavior.
+ *str = ralloc_vasprintf(NULL, fmt, args);
+ return true;
+ }
+
+ new_length = printf_length(fmt, args);
+
+ ptr = resize(*str, *start + new_length + 1);
+ if (unlikely(ptr == NULL))
+ return false;
+
+ vsnprintf(ptr + *start, new_length + 1, fmt, args);
+ *str = ptr;
+ *start += new_length;
+ return true;
+}