348 lines
8.4 KiB
C
348 lines
8.4 KiB
C
/*
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* Prototype search and parsing functions
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*
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* Copyright 2000 Jon Griffiths
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include "winedump.h"
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static char *grep_buff = NULL;
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static char *fgrep_buff = NULL;
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static int symbol_from_prototype (parsed_symbol *sym, const char *prototype);
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static const char *get_type (parsed_symbol *sym, const char *proto, int arg);
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/*******************************************************************
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* symbol_search
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*
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* Call Patrik Stridvall's 'function_grep.pl' script to retrieve a
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* function prototype from include file(s)
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*/
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int symbol_search (parsed_symbol *sym)
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{
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static const size_t MAX_RESULT_LEN = 1024;
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FILE *grep;
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int attempt = 0;
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assert (globals.do_code);
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assert (globals.directory);
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assert (sym && sym->symbol);
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if (!symbol_is_valid_c (sym))
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return - 1;
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if (!grep_buff)
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grep_buff = (char *) malloc (MAX_RESULT_LEN);
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if (!fgrep_buff)
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fgrep_buff = (char *) malloc (MAX_RESULT_LEN);
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if (!grep_buff || !fgrep_buff)
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fatal ("Out of Memory");
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/* Use 'grep' to tell us which possible files the function is in,
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* then use 'function_grep.pl' to get the prototype. If this fails the
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* first time then give grep a more general query (that doesn't
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* require an opening argument brace on the line with the function name).
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*/
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while (attempt < 2)
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{
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FILE *f_grep;
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char *cmd = str_create (4, "grep -d recurse -l \"", sym->symbol,
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!attempt ? "[:blank:]*(\" " : "\" ", globals.directory);
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if (VERBOSE)
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puts (cmd);
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fflush (NULL); /* See 'man popen' */
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if (!(grep = popen (cmd, "r")))
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fatal ("Cannot execute grep -l");
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free (cmd);
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while (fgets (grep_buff, MAX_RESULT_LEN, grep))
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{
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int i;
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for (i = 0; grep_buff[i] && grep_buff[i] != '\n' ; i++)
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;
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grep_buff[i] = '\0';
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if (VERBOSE)
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puts (grep_buff);
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cmd = str_create (5, "function_grep.pl ", sym->symbol,
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" \"", grep_buff, "\"");
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if (VERBOSE)
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puts (cmd);
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fflush (NULL); /* See 'man popen' */
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if (!(f_grep = popen (cmd, "r")))
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fatal ("Cannot execute function_grep.pl");
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free (cmd);
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while (fgets (grep_buff, MAX_RESULT_LEN, f_grep))
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{
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char *iter = grep_buff;
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/* Keep only the first line */
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symbol_clean_string(grep_buff);
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for (i = 0; grep_buff[i] && grep_buff[i] != '\n' ; i++)
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;
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grep_buff[i] = '\0';
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if (VERBOSE)
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puts (grep_buff);
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while ((iter = strstr (iter, sym->symbol)))
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{
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if (iter > grep_buff && iter[-1] == ' ' &&
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(iter[strlen (sym->symbol)] == ' ' ||
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iter[strlen (sym->symbol)] == '('))
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{
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if (VERBOSE)
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printf ("Prototype '%s' looks OK, processing\n", grep_buff);
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if (!symbol_from_prototype (sym, grep_buff))
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{
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pclose (f_grep);
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pclose (grep);
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return 0; /* OK */
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}
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if (VERBOSE)
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puts ("Failed, trying next");
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}
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else
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iter += strlen (sym->symbol);
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}
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}
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pclose (f_grep);
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}
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pclose (grep);
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attempt++;
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}
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return -1; /* Not found */
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}
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/*******************************************************************
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* symbol_from_prototype
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*
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* Convert a C prototype into a symbol
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*/
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static int symbol_from_prototype (parsed_symbol *sym, const char *proto)
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{
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const char *iter;
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int found;
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proto = get_type (sym, proto, -1); /* Get return type */
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if (!proto)
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return -1;
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iter = str_match (proto, sym->symbol, &found);
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if (!found)
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{
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char *call;
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/* Calling Convention */
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iter = strchr (iter, ' ');
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if (!iter)
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return -1;
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call = str_substring (proto, iter);
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if (!strcasecmp (call, "cdecl") || !strcasecmp (call, "__cdecl"))
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sym->flags |= SYM_CDECL;
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else
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sym->flags |= SYM_STDCALL;
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free (call);
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iter = str_match (iter, sym->symbol, &found);
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if (!found)
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return -1;
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if (VERBOSE)
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printf ("Using %s calling convention\n",
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sym->flags & SYM_CDECL ? "cdecl" : "stdcall");
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}
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else
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sym->flags = CALLING_CONVENTION;
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sym->function_name = strdup (sym->symbol);
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proto = iter;
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/* Now should be the arguments */
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if (*proto++ != '(')
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return -1;
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for (; *proto == ' '; proto++);
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if (!strncmp (proto, "void", 4))
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return 0;
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do
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{
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/* Process next argument */
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str_match (proto, "...", &sym->varargs);
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if (sym->varargs)
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return 0;
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if (!(proto = get_type (sym, proto, sym->argc)))
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return -1;
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sym->argc++;
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if (*proto == ',')
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proto++;
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else if (*proto != ')')
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return -1;
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} while (*proto != ')');
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return 0;
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}
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/*******************************************************************
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* get_type
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*
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* Read a type from a prototype
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*/
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static const char *get_type (parsed_symbol *sym, const char *proto, int arg)
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{
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int is_const, is_volatile, is_struct, is_signed, is_unsigned, ptrs = 0;
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const char *iter, *type_str, *base_type, *catch_unsigned;
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char dest_type;
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assert (sym && sym->symbol);
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assert (proto && *proto);
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assert (arg < 0 || (unsigned)arg == sym->argc);
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type_str = proto;
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proto = str_match (proto, "const", &is_const);
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proto = str_match (proto, "volatile", &is_volatile);
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proto = str_match (proto, "struct", &is_struct);
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if (!is_struct)
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proto = str_match (proto, "union", &is_struct);
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catch_unsigned = proto;
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proto = str_match (proto, "unsigned", &is_unsigned);
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proto = str_match (proto, "signed", &is_signed);
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/* Can have 'unsigned const' or 'const unsigned' etc */
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if (!is_const)
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proto = str_match (proto, "const", &is_const);
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if (!is_volatile)
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proto = str_match (proto, "volatile", &is_volatile);
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base_type = proto;
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iter = str_find_set (proto, " ,*)");
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if (!iter)
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return NULL;
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if (arg < 0 && (is_signed || is_unsigned))
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{
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/* Prevent calling convention from being swallowed by 'un/signed' alone */
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if (strncmp (base_type, "int", 3) && strncmp (base_type, "long", 4) &&
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strncmp (base_type, "short", 5) && strncmp (base_type, "char", 4))
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{
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iter = proto;
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base_type = catch_unsigned;
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}
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}
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else
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catch_unsigned = NULL;
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/* FIXME: skip const/volatile here too */
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for (proto = iter; *proto; proto++)
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if (*proto == '*')
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ptrs++;
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else if (*proto != ' ')
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break;
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if (!*proto)
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return NULL;
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type_str = str_substring (type_str, proto);
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if (iter == base_type || catch_unsigned)
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{
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/* 'unsigned' with no type */
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char *tmp = str_create (2, type_str, " int");
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free ((char*)type_str);
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type_str = tmp;
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}
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symbol_clean_string (type_str);
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dest_type = symbol_get_type (type_str);
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if (arg < 0)
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{
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sym->return_text = (char*)type_str;
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sym->return_type = dest_type;
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}
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else
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{
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sym->arg_type [arg] = dest_type;
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sym->arg_flag [arg] = is_const ? CT_CONST : is_volatile ? CT_VOLATILE : 0;
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if (*proto == ',' || *proto == ')')
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sym->arg_name [arg] = str_create_num (1, arg, "arg");
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else
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{
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iter = str_find_set (proto, " ,)");
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if (!iter)
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{
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free ((char*)type_str);
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return NULL;
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}
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sym->arg_name [arg] = str_substring (proto, iter);
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proto = iter;
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}
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sym->arg_text [arg] = (char*)type_str;
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}
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return proto;
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}
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#ifdef __GNUC__
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/*******************************************************************
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* search_cleanup
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*
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* Free memory used while searching (a niceity)
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*/
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void search_cleanup (void) __attribute__ ((destructor));
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void search_cleanup (void)
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{
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if (grep_buff)
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free (grep_buff);
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if (fgrep_buff)
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free (fgrep_buff);
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}
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#endif
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