glsl: Handle file numbering.

src/glsl/pp/sl_pp_context.c

@@ -38,6 +38,7 @@ sl_pp_context_init(struct sl_pp_context *context)
    context->if_value = 1;
    memset(context->error_msg, 0, sizeof(context->error_msg));
    context->line = 1;
+   context->file = 0;
 }
 
 void

src/glsl/pp/sl_pp_context.h

@@ -50,6 +50,7 @@ struct sl_pp_context {
    char error_msg[SL_PP_MAX_ERROR_MSG];
 
    unsigned int line;
+   unsigned int file;
 };
 
 void

src/glsl/pp/sl_pp_line.c

@@ -134,7 +134,26 @@ sl_pp_process_line(struct sl_pp_context *context,
       context->line = line;
    }
 
-   /* TODO: Do something with the file number. */
+   if (file_number != -1) {
+      unsigned int file;
+
+      str = sl_pp_context_cstr(context, file_number);
+      if (_parse_integer(str, &file)) {
+         return -1;
+      }
+
+      if (context->file != file) {
+         struct sl_pp_token_info ti;
+
+         ti.token = SL_PP_FILE;
+         ti.data.file = file;
+         if (sl_pp_process_out(pstate, &ti)) {
+            return -1;
+         }
+
+         context->file = file;
+      }
+   }
 
    return 0;
 }

src/glsl/pp/sl_pp_macro.c

@@ -138,9 +138,8 @@ sl_pp_macro_expand(struct sl_pp_context *context,
       (*pi)++;
       return 0;
    }
-   /* TODO: Having the following built-ins hardcoded is a bit lame. */
    if (!strcmp(macro_str, "__FILE__")) {
-      if (!mute && _out_number(context, state, 0)) {
+      if (!mute && _out_number(context, state, context->file)) {
          return -1;
       }
       (*pi)++;

src/glsl/pp/sl_pp_token.h

@@ -97,6 +97,7 @@ enum sl_pp_token {
    SL_PP_EXTENSION_DISABLE,
 
    SL_PP_LINE,
+   SL_PP_FILE,
 
    SL_PP_EOF
 };
@@ -108,6 +109,7 @@ union sl_pp_token_data {
    int pragma;
    int extension;
    unsigned int line;
+   unsigned int file;
 };
 
 struct sl_pp_token_info {