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path: root/mesalib/src/glsl/glcpp/glcpp.c
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Diffstat (limited to 'mesalib/src/glsl/glcpp/glcpp.c')
-rw-r--r--mesalib/src/glsl/glcpp/glcpp.c59
1 files changed, 56 insertions, 3 deletions
diff --git a/mesalib/src/glsl/glcpp/glcpp.c b/mesalib/src/glsl/glcpp/glcpp.c
index 7c2ded850..6994d7bb9 100644
--- a/mesalib/src/glsl/glcpp/glcpp.c
+++ b/mesalib/src/glsl/glcpp/glcpp.c
@@ -24,6 +24,8 @@
#include <stdio.h>
#include <string.h>
#include <errno.h>
+#include <getopt.h>
+
#include "glcpp.h"
#include "main/mtypes.h"
#include "main/shaderobj.h"
@@ -94,6 +96,37 @@ load_text_file(void *ctx, const char *filename)
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
+};
+
+const static struct option
+long_options[] = {
+ {"disable-line-continuations", no_argument, 0, DISABLE_LINE_CONTINUATIONS_OPT },
+ {0, 0, 0, 0 }
+};
+
int
main (int argc, char *argv[])
{
@@ -102,16 +135,36 @@ main (int argc, char *argv[])
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, "", long_options, NULL)) != -1) {
+ switch (c) {
+ case DISABLE_LINE_CONTINUATIONS_OPT:
+ gl_ctx.Const.DisableGLSLLineContinuations = true;
+ break;
+ default:
+ usage ();
+ exit (1);
+ }
+ }
- if (argc) {
- filename = argv[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;
- ret = glcpp_preprocess(ctx, &shader, &info_log, NULL, API_OPENGL_COMPAT);
+ ret = glcpp_preprocess(ctx, &shader, &info_log, NULL, &gl_ctx);
printf("%s", shader);
fprintf(stderr, "%s", info_log);