check.c

   1 /*
   2  * Example trivial client program that uses the sparse library
   3  * to tokenize, pre-process and parse a C file, and prints out
   4  * the results.
   5  *
   6  * Copyright (C) 2003 Transmeta Corp.
   7  *               2003 Linus Torvalds
   8  *
   9  *  Licensed under the Open Software License version 1.1
  10  */
  11 #include <stdarg.h>
  12 #include <stdlib.h>
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include <ctype.h>
  16 #include <unistd.h>
  17 #include <fcntl.h>
  18
  19 #include "lib.h"
  20 #include "token.h"
  21 #include "parse.h"
  22 #include "symbol.h"
  23 #include "expression.h"
  24
  25 static void clean_up_symbol(struct symbol *sym, void *_parent, int flags)
  26 {
  27         check_duplicates(sym);
  28         evaluate_symbol(sym);
  29         expand_symbol(sym);
  30 }
  31
  32 int main(int argc, char **argv)
  33 {
  34         int fd;
  35         char *filename = NULL, **args;
  36         struct token *token;
  37
  38         // Initialize symbol stream first, so that we can add defines etc
  39         init_symbols();
  40
  41         create_builtin_stream();
  42         add_pre_buffer("extern void *__builtin_memcpy(void *, const void *, unsigned long);\n");
  43         add_pre_buffer("extern void * __builtin_return_address(int);\n");
  44
  45         args = argv;
  46         for (;;) {
  47                 char *arg = *++args;
  48                 if (!arg)
  49                         break;
  50                 if (arg[0] == '-') {
  51                         args = handle_switch(arg+1, args);
  52                         continue;
  53                 }
  54                 filename = arg;
  55         }
  56
  57
  58         fd = open(filename, O_RDONLY);
  59         if (fd < 0)
  60                 die("No such file: %s", filename);
  61
  62         // Tokenize the input stream
  63         token = tokenize(filename, fd, NULL);
  64         close(fd);
  65
  66         // Prepend any "include" file to the stream.
  67         if (include_fd >= 0)
  68                 token = tokenize(include, include_fd, token);
  69
  70         // Prepend the initial built-in stream
  71         token = tokenize_buffer(pre_buffer, pre_buffer_size, token);
  72
  73         // Pre-process the stream
  74         token = preprocess(token);
  75
  76         if (preprocess_only) {
  77                 while (!eof_token(token)) {
  78                         int prec = 1;
  79                         struct token *next = token->next;
  80                         char * separator = "";
  81                         if (next->pos.whitespace)
  82                                 separator = " ";
  83                         if (next->pos.newline) {
  84                                 separator = "\n\t\t\t\t\t";
  85                                 prec = next->pos.pos;
  86                                 if (prec > 4)
  87                                         prec = 4;
  88                         }
  89                         printf("%s%.*s", show_token(token), prec, separator);
  90                         token = next;
  91                 }
  92                 putchar('\n');
  93
  94                 return 0;
  95         }
  96
  97         // Parse the resulting C code
  98         translation_unit(token, &used_list);
  99
 100         // Do type evaluation and simplify
 101         symbol_iterate(used_list, clean_up_symbol, NULL);
 102         return 0;
 103 }