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,
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  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
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  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 "sl_pp_process.h"
  30
  31
  32 int
  33 sl_pp_process_line(struct sl_pp_context *context,
  34                    const struct sl_pp_token_info *input,
  35                    unsigned int first,
  36                    unsigned int last,
  37                    struct sl_pp_process_state *pstate)
  38 {
  39    unsigned int i;
  40    struct sl_pp_process_state state;
  41    int line_number = -1;
  42    int file_number = -1;
  43    unsigned int line;
  44
  45    memset(&state, 0, sizeof(state));
  46    for (i = first; i < last;) {
  47       switch (input[i].token) {
  48       case SL_PP_WHITESPACE:
  49          i++;
  50          break;
  51
  52       case SL_PP_IDENTIFIER:
  53          if (sl_pp_macro_expand(context, input, &i, NULL, &state, 0)) {
  54             free(state.out);
  55             return -1;
  56          }
  57          break;
  58
  59       default:
  60          if (sl_pp_process_out(&state, &input[i])) {
  61             strcpy(context->error_msg, "out of memory");
  62             free(state.out);
  63             return -1;
  64          }
  65          i++;
  66       }
  67    }
  68
  69    if (state.out_len > 0 && state.out[0].token == SL_PP_NUMBER) {
  70       line_number = state.out[0].data.number;
  71    } else {
  72       strcpy(context->error_msg, "expected a number after `#line'");
  73       free(state.out);
  74       return -1;
  75    }
  76
  77    if (state.out_len > 1) {
  78       if (state.out[1].token == SL_PP_NUMBER) {
  79          file_number = state.out[1].data.number;
  80       } else {
  81          strcpy(context->error_msg, "expected a number after line number");
  82          free(state.out);
  83          return -1;
  84       }
  85
  86       if (state.out_len > 2) {
  87          strcpy(context->error_msg, "expected an end of line after file number");
  88          free(state.out);
  89          return -1;
  90       }
  91    }
  92
  93    free(state.out);
  94
  95    line = atoi(sl_pp_context_cstr(context, line_number));
  96
  97    if (context->line != line) {
  98       struct sl_pp_token_info ti;
  99
 100       ti.token = SL_PP_LINE;
 101       ti.data.line = line;
 102       if (sl_pp_process_out(pstate, &ti)) {
 103          strcpy(context->error_msg, "out of memory");
 104          return -1;
 105       }
 106
 107       context->line = line;
 108    }
 109
 110    if (file_number != -1) {
 111       unsigned int file;
 112
 113       file_number = atoi(sl_pp_context_cstr(context, file_number));
 114
 115       if (context->file != file) {
 116          struct sl_pp_token_info ti;
 117
 118          ti.token = SL_PP_FILE;
 119          ti.data.file = file;
 120          if (sl_pp_process_out(pstate, &ti)) {
 121             strcpy(context->error_msg, "out of memory");
 122             return -1;
 123          }
 124
 125          context->file = file;
 126       }
 127    }
 128
 129    return 0;
 130 }