src/glsl/pp/sl_pp_line.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include "sl_pp_context.h"
  31 #include "sl_pp_public.h"
  32 #include "sl_pp_process.h"
  33
  34
  35 int
  36 sl_pp_process_line(struct sl_pp_context *context,
  37                    struct sl_pp_token_buffer *buffer,
  38                    struct sl_pp_process_state *pstate)
  39 {
  40    struct sl_pp_process_state state;
  41    int found_end = 0;
  42    int line_number = -1;
  43    int file_number = -1;
  44    unsigned int line;
  45    unsigned int file;
  46
  47    memset(&state, 0, sizeof(state));
  48    while (!found_end) {
  49       struct sl_pp_token_info input;
  50
  51       sl_pp_token_buffer_get(buffer, &input);
  52       switch (input.token) {
  53       case SL_PP_WHITESPACE:
  54          break;
  55
  56       case SL_PP_IDENTIFIER:
  57          sl_pp_token_buffer_unget(buffer, &input);
  58          if (sl_pp_macro_expand(context, buffer, NULL, &state, sl_pp_macro_expand_normal)) {
  59             free(state.out);
  60             return -1;
  61          }
  62          break;
  63
  64       case SL_PP_NEWLINE:
  65       case SL_PP_EOF:
  66          found_end = 1;
  67          break;
  68
  69       default:
  70          if (sl_pp_process_out(&state, &input)) {
  71             strcpy(context->error_msg, "out of memory");
  72             free(state.out);
  73             return -1;
  74          }
  75       }
  76    }
  77
  78    if (state.out_len > 0 && state.out[0].token == SL_PP_UINT) {
  79       line_number = state.out[0].data._uint;
  80    } else {
  81       strcpy(context->error_msg, "expected a number after `#line'");
  82       free(state.out);
  83       return -1;
  84    }
  85
  86    if (state.out_len > 1) {
  87       if (state.out[1].token == SL_PP_UINT) {
  88          file_number = state.out[1].data._uint;
  89       } else {
  90          strcpy(context->error_msg, "expected a number after line number");
  91          free(state.out);
  92          return -1;
  93       }
  94
  95       if (state.out_len > 2) {
  96          strcpy(context->error_msg, "expected an end of line after file number");
  97          free(state.out);
  98          return -1;
  99       }
 100    }
 101
 102    free(state.out);
 103
 104    line = atoi(sl_pp_context_cstr(context, line_number));
 105    if (file_number != -1) {
 106       file = atoi(sl_pp_context_cstr(context, file_number));
 107    } else {
 108       file = context->file;
 109    }
 110
 111    if (context->line != line || context->file != file) {
 112       struct sl_pp_token_info ti;
 113
 114       ti.token = SL_PP_LINE;
 115       ti.data.line.lineno = line;
 116       ti.data.line.fileno = file;
 117       if (sl_pp_process_out(pstate, &ti)) {
 118          strcpy(context->error_msg, "out of memory");
 119          return -1;
 120       }
 121
 122       context->line = line;
 123       context->file = file;
 124    }
 125
 126    return 0;
 127 }