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_macro.h"
  32 #include "sl_pp_public.h"
  33 #include "sl_pp_process.h"
  34 #include "sl_pp_token.h"
  35
  36
  37 int
  38 sl_pp_process_line(struct sl_pp_context *context,
  39                    struct sl_pp_token_buffer *buffer,
  40                    struct sl_pp_process_state *pstate)
  41 {
  42    struct sl_pp_process_state state;
  43    int found_end = 0;
  44    int line_number = -1;
  45    int file_number = -1;
  46    unsigned int line;
  47    unsigned int file;
  48
  49    memset(&state, 0, sizeof(state));
  50    while (!found_end) {
  51       struct sl_pp_token_info input;
  52
  53       sl_pp_token_buffer_get(buffer, &input);
  54       switch (input.token) {
  55       case SL_PP_WHITESPACE:
  56          break;
  57
  58       case SL_PP_IDENTIFIER:
  59          sl_pp_token_buffer_unget(buffer, &input);
  60          if (sl_pp_macro_expand(context, buffer, NULL, &state, sl_pp_macro_expand_normal)) {
  61             free(state.out);
  62             return -1;
  63          }
  64          break;
  65
  66       case SL_PP_NEWLINE:
  67       case SL_PP_EOF:
  68          found_end = 1;
  69          break;
  70
  71       default:
  72          if (sl_pp_process_out(&state, &input)) {
  73             strcpy(context->error_msg, "out of memory");
  74             free(state.out);
  75             return -1;
  76          }
  77       }
  78    }
  79
  80    if (state.out_len > 0 && state.out[0].token == SL_PP_UINT) {
  81       line_number = state.out[0].data._uint;
  82    } else {
  83       strcpy(context->error_msg, "expected a number after `#line'");
  84       free(state.out);
  85       return -1;
  86    }
  87
  88    if (state.out_len > 1) {
  89       if (state.out[1].token == SL_PP_UINT) {
  90          file_number = state.out[1].data._uint;
  91       } else {
  92          strcpy(context->error_msg, "expected a number after line number");
  93          free(state.out);
  94          return -1;
  95       }
  96
  97       if (state.out_len > 2) {
  98          strcpy(context->error_msg, "expected an end of line after file number");
  99          free(state.out);
 100          return -1;
 101       }
 102    }
 103
 104    free(state.out);
 105
 106    line = atoi(sl_pp_context_cstr(context, line_number));
 107    if (file_number != -1) {
 108       file = atoi(sl_pp_context_cstr(context, file_number));
 109    } else {
 110       file = context->file;
 111    }
 112
 113    if (context->line != line || context->file != file) {
 114       struct sl_pp_token_info ti;
 115
 116       ti.token = SL_PP_LINE;
 117       ti.data.line.lineno = line;
 118       ti.data.line.fileno = file;
 119       if (sl_pp_process_out(pstate, &ti)) {
 120          strcpy(context->error_msg, "out of memory");
 121          return -1;
 122       }
 123
 124       context->line = line;
 125       context->file = file;
 126    }
 127
 128    return 0;
 129 }