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_public.h"
  31 #include "sl_pp_process.h"
  32
  33
  34 int
  35 sl_pp_process_line(struct sl_pp_context *context,
  36                    struct sl_pp_token_buffer *buffer,
  37                    struct sl_pp_process_state *pstate)
  38 {
  39    struct sl_pp_process_state state;
  40    int found_end = 0;
  41    int line_number = -1;
  42    int file_number = -1;
  43    unsigned int line;
  44    unsigned int file;
  45
  46    memset(&state, 0, sizeof(state));
  47    while (!found_end) {
  48       struct sl_pp_token_info input;
  49
  50       sl_pp_token_buffer_get(buffer, &input);
  51       switch (input.token) {
  52       case SL_PP_WHITESPACE:
  53          break;
  54
  55       case SL_PP_IDENTIFIER:
  56          sl_pp_token_buffer_unget(buffer, &input);
  57          if (sl_pp_macro_expand(context, buffer, NULL, &state, sl_pp_macro_expand_normal)) {
  58             free(state.out);
  59             return -1;
  60          }
  61          break;
  62
  63       case SL_PP_NEWLINE:
  64       case SL_PP_EOF:
  65          found_end = 1;
  66          break;
  67
  68       default:
  69          if (sl_pp_process_out(&state, &input)) {
  70             strcpy(context->error_msg, "out of memory");
  71             free(state.out);
  72             return -1;
  73          }
  74       }
  75    }
  76
  77    if (state.out_len > 0 && state.out[0].token == SL_PP_UINT) {
  78       line_number = state.out[0].data._uint;
  79    } else {
  80       strcpy(context->error_msg, "expected a number after `#line'");
  81       free(state.out);
  82       return -1;
  83    }
  84
  85    if (state.out_len > 1) {
  86       if (state.out[1].token == SL_PP_UINT) {
  87          file_number = state.out[1].data._uint;
  88       } else {
  89          strcpy(context->error_msg, "expected a number after line number");
  90          free(state.out);
  91          return -1;
  92       }
  93
  94       if (state.out_len > 2) {
  95          strcpy(context->error_msg, "expected an end of line after file number");
  96          free(state.out);
  97          return -1;
  98       }
  99    }
 100
 101    free(state.out);
 102
 103    line = atoi(sl_pp_context_cstr(context, line_number));
 104    if (file_number != -1) {
 105       file = atoi(sl_pp_context_cstr(context, file_number));
 106    } else {
 107       file = context->file;
 108    }
 109
 110    if (context->line != line || context->file != file) {
 111       struct sl_pp_token_info ti;
 112
 113       ti.token = SL_PP_LINE;
 114       ti.data.line.lineno = line;
 115       ti.data.line.fileno = file;
 116       if (sl_pp_process_out(pstate, &ti)) {
 117          strcpy(context->error_msg, "out of memory");
 118          return -1;
 119       }
 120
 121       context->line = line;
 122       context->file = file;
 123    }
 124
 125    return 0;
 126 }