1 files changed, 182 insertions, 0 deletions
diff --git a/src/compiler/glsl/glcpp/glcpp.c b/src/compiler/glsl/glcpp/glcpp.c
new file mode 100644
index 00000000000..c62f4efec9d
--- /dev/null
+++ b/src/compiler/glsl/glcpp/glcpp.c
@@ -0,0 +1,182 @@
+/*
+ * 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 <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <getopt.h>
+
+#include "glcpp.h"
+#include "main/mtypes.h"
+#include "main/shaderobj.h"
+#include "util/strtod.h"
+
+extern int glcpp_parser_debug;
+
+void
+_mesa_reference_shader(struct gl_context *ctx, struct gl_shader **ptr,
+                       struct gl_shader *sh)
+{
+   (void) ctx;
+   *ptr = sh;
+}
+
+/* Read from fp until EOF and return a string of everything read.
+ */
+static char *
+load_text_fp (void *ctx, FILE *fp)
+{
+#define CHUNK 4096
+	char *text = NULL;
+	size_t text_size = 0;
+	size_t total_read = 0;
+	size_t bytes;
+
+	while (1) {
+		if (total_read + CHUNK + 1 > text_size) {
+			text_size = text_size ? text_size * 2 : CHUNK + 1;
+			text = reralloc_size (ctx, text, text_size);
+			if (text == NULL) {
+				fprintf (stderr, "Out of memory\n");
+				return NULL;
+			}
+		}
+		bytes = fread (text + total_read, 1, CHUNK, fp);
+		total_read += bytes;
+
+		if (bytes < CHUNK) {
+			break;
+		}
+	}
+
+	text[total_read] = '\0';
+
+	return text;
+}
+
+static char *
+load_text_file(void *ctx, const char *filename)
+{
+	char *text;
+	FILE *fp;
+
+	if (filename == NULL || strcmp (filename, "-") == 0)
+		return load_text_fp (ctx, stdin);
+
+	fp = fopen (filename, "r");
+	if (fp == NULL) {
+		fprintf (stderr, "Failed to open file %s: %s\n",
+			 filename, strerror (errno));
+		return NULL;
+	}
+
+	text = load_text_fp (ctx, fp);
+
+	fclose(fp);
+
+	return text;
+}
+
+/* Initialize only those things that glcpp cares about.
+ */
+static void
+init_fake_gl_context (struct gl_context *gl_ctx)
+{
+	gl_ctx->API = API_OPENGL_COMPAT;
+	gl_ctx->Const.DisableGLSLLineContinuations = false;
+}
+
+static void
+usage (void)
+{
+	fprintf (stderr,
+		 "Usage: glcpp [OPTIONS] [--] [<filename>]\n"
+		 "\n"
+		 "Pre-process the given filename (stdin if no filename given).\n"
+		 "The following options are supported:\n"
+		 "    --disable-line-continuations      Do not interpret lines ending with a\n"
+		 "                                      backslash ('\\') as a line continuation.\n");
+}
+
+enum {
+	DISABLE_LINE_CONTINUATIONS_OPT = CHAR_MAX + 1
+};
+
+static const struct option
+long_options[] = {
+	{"disable-line-continuations", no_argument, 0, DISABLE_LINE_CONTINUATIONS_OPT },
+        {"debug",                      no_argument, 0, 'd'},
+	{0,                            0,           0, 0 }
+};
+
+int
+main (int argc, char *argv[])
+{
+	char *filename = NULL;
+	void *ctx = ralloc(NULL, void*);
+	char *info_log = ralloc_strdup(ctx, "");
+	const char *shader;
+	int ret;
+	struct gl_context gl_ctx;
+	int c;
+
+	init_fake_gl_context (&gl_ctx);
+
+	while ((c = getopt_long(argc, argv, "d", long_options, NULL)) != -1) {
+		switch (c) {
+		case DISABLE_LINE_CONTINUATIONS_OPT:
+			gl_ctx.Const.DisableGLSLLineContinuations = true;
+			break;
+                case 'd':
+			glcpp_parser_debug = 1;
+			break;
+		default:
+			usage ();
+			exit (1);
+		}
+	}
+
+	if (optind + 1 < argc) {
+		printf ("Unexpected argument: %s\n", argv[optind+1]);
+		usage ();
+		exit (1);
+	}
+	if (optind < argc) {
+		filename = argv[optind];
+	}
+
+	shader = load_text_file (ctx, filename);
+	if (shader == NULL)
+	   return 1;
+
+	_mesa_locale_init();
+
+	ret = glcpp_preprocess(ctx, &shader, &info_log, NULL, &gl_ctx);
+
+	printf("%s", shader);
+	fprintf(stderr, "%s", info_log);
+
+	ralloc_free(ctx);
+
+	return ret;
+}