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/**************************************************************************
*
* Copyright 2009 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#include <stdlib.h>
#include "sl_pp_process.h"
static int
_parse_integer(const char *input,
unsigned int *number)
{
unsigned int n = 0;
while (*input >= '0' && *input <= '9') {
if (n * 10 < n) {
/* Overflow. */
return -1;
}
n = n * 10 + (*input++ - '0');
}
if (*input != '\0') {
/* Invalid decimal number. */
return -1;
}
*number = n;
return 0;
}
int
sl_pp_process_line(struct sl_pp_context *context,
const struct sl_pp_token_info *input,
unsigned int first,
unsigned int last,
struct sl_pp_process_state *pstate)
{
unsigned int i;
struct sl_pp_process_state state;
int line_number = -1;
int file_number = -1;
const char *str;
unsigned int line;
memset(&state, 0, sizeof(state));
for (i = first; i < last;) {
switch (input[i].token) {
case SL_PP_WHITESPACE:
i++;
break;
case SL_PP_IDENTIFIER:
if (sl_pp_macro_expand(context, input, &i, NULL, &state, 0)) {
free(state.out);
return -1;
}
break;
default:
if (sl_pp_process_out(&state, &input[i])) {
free(state.out);
return -1;
}
i++;
}
}
if (state.out_len > 0 && state.out[0].token == SL_PP_NUMBER) {
line_number = state.out[0].data.number;
} else {
strcpy(context->error_msg, "expected number after `#line'");
free(state.out);
return -1;
}
if (state.out_len > 1) {
if (state.out[1].token == SL_PP_NUMBER) {
file_number = state.out[1].data.number;
} else {
strcpy(context->error_msg, "expected number after line number");
free(state.out);
return -1;
}
if (state.out_len > 2) {
strcpy(context->error_msg, "expected end of line after file number");
free(state.out);
return -1;
}
}
free(state.out);
str = sl_pp_context_cstr(context, line_number);
if (_parse_integer(str, &line)) {
return -1;
}
if (context->line != line) {
struct sl_pp_token_info ti;
ti.token = SL_PP_LINE;
ti.data.line = line;
if (sl_pp_process_out(pstate, &ti)) {
return -1;
}
context->line = line;
}
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;
}
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