glcpp: Make standalone binary use preprocess().

This prevents the two code paths from getting out of sync.  Also, future
work will need the shader source as a string anyway.

Unfortunately, this copies and pastes load_text_file from main.cpp, with
small changes (support for reading from stdin, talloc).

diff --git a/glcpp/glcpp.c b/glcpp/glcpp.c
index 8ba4661..cc87e14 100644 (file)
--- a/glcpp/glcpp.c
+++ b/glcpp/glcpp.c
@@ -21,24 +21,68 @@
  * DEALINGS IN THE SOFTWARE.
  */
 
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
 #include "glcpp.h"
 
 extern int yydebug;
 
-int
-main (void)
+static char *
+load_text_file(void *ctx, const char *file_name)
 {
-       glcpp_parser_t *parser;
-       int ret;
+       char *text = NULL;
+       struct stat st;
+       ssize_t total_read = 0;
+       int fd = file_name == NULL ? STDIN_FILENO : open(file_name, O_RDONLY);
+
+       if (fd < 0) {
+               return NULL;
+       }
+
+       if (fstat(fd, & st) == 0) {
+               text = (char *) talloc_size(ctx, st.st_size + 1);
+               if (text != NULL) {
+                       do {
+                               ssize_t bytes = read(fd, text + total_read,
+                                                    st.st_size - total_read);
+                               if (bytes < 0) {
+                                       text = NULL;
+                                       break;
+                               }
+
+                               if (bytes == 0) {
+                                       break;
+                               }
+
+                               total_read += bytes;
+                       } while (total_read < st.st_size);
+
+                       text[total_read] = '\0';
+               }
+       }
 
-       parser = glcpp_parser_create ();
+       close(fd);
 
-       ret = glcpp_parser_parse (parser);
+       return text;
+}
+
+int
+preprocess(void *talloc_ctx, const char **shader, char **info_log);
+
+int
+main (void)
+{
+       void *ctx = talloc(NULL, void*);
+       const char *shader = load_text_file(ctx, NULL);
+       char *info_log = talloc_strdup(ctx, "");
+       int ret = preprocess(ctx, &shader, &info_log);
 
-       printf("%s", parser->output);
-       fprintf(stderr, "%s", parser->info_log);
+       printf("%s", shader);
+       fprintf(stderr, "%s", info_log);
 
-       glcpp_parser_destroy (parser);
+       talloc_free(ctx);
 
        return ret;
 }

diff --git a/glcpp/glcpp.h b/glcpp/glcpp.h
index bb0ac95..2cfa98d 100644 (file)
--- a/glcpp/glcpp.h
+++ b/glcpp/glcpp.h
@@ -167,6 +167,9 @@ glcpp_parser_parse (glcpp_parser_t *parser);
 void
 glcpp_parser_destroy (glcpp_parser_t *parser);
 
+int
+preprocess(void *talloc_ctx, const char **shader, char **info_log);
+
 /* Functions for writing to the info log */
 
 void