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Location: cpp/openttd-patchpack/source/src/depend/depend.cpp - annotation
r11902:1d7b999e8b04
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(svn r16307) -Fix: makedepend can't handle the amount of files we have and it also miss some dependencies. That's why we introduce our custom implementation of makedepend.
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/**
* @file depend/depend.cpp Custom implementation of Makedepend.
*
* We previously used makedepend, but that could not handle the amount of
* files we have and does not handle conditional includes in a sane manner.
* This caused many link problems because not enough files were recompiled.
* This has lead to the development of our own dependency generator. It is
* meant to be a substitute to the (relatively slow) dependency generation
* via gcc. It thus helps speeding up compilation. It will also ignore
* system headers making it less error prone when system headers are moved
* or renamed.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>
#include <unistd.h>
#include <map>
#include <set>
#include <stack>
/** Simple string comparator using strcmp as implementation */
struct StringCompare {
/**
* Compare a to b using strcmp.
* @param a string to compare.
* @param b string to compare.
* @return whether a is less than b.
*/
bool operator () (const char *a, const char *b) const
{
return strcmp(a, b) < 0;
}
};
/** Set of C-style strings. */
typedef std::set<const char*, StringCompare> StringSet;
/** Mapping of C-style string to a set of C-style strings. */
typedef std::map<const char*, StringSet*, StringCompare> StringMap;
/** Pair of C-style string and a set of C-style strings. */
typedef std::pair<const char*, StringSet*> StringMapItem;
/** Include directory to search in. */
static StringSet _include_dirs;
/** Files that have been parsed/handled with their dependencies. */
static StringMap _files;
/** Dependencies of headers. */
static StringMap _headers;
/** The current 'active' defines. */
static StringSet _defines;
/**
* Helper class to read a file.
*/
class File {
public:
/**
* Create the helper by opening the given file.
* @param filename the file to open
* @post the file is open; otherwise the application is killed.
*/
File(const char *filename) : filename(filename)
{
this->fp = fopen(filename, "r");
if (this->fp == NULL) {
fprintf(stdout, "Could not open %s for reading\n", filename);
exit(1);
}
this->dirname = strdup(filename);
char *last = strrchr(this->dirname, '/');
if (last != NULL) {
*last = '\0';
} else {
*this->dirname = '\0';
}
}
/** Free everything we have allocated. */
~File()
{
fclose(this->fp);
free(this->dirname);
}
/**
* Get a single character from the file.
* If we are reading beyond the end of the file '\0' is returned.
* @return the read character.
*/
char GetChar() const
{
char c = fgetc(this->fp);
return (c == EOF) ? '\0' : c;
}
/**
* Get the directory name of the file.
* @return the directory name.
*/
const char *GetDirname() const
{
return this->dirname;
}
private:
FILE *fp; ///< The currently opened file.
char *dirname; ///< The directory of the file.
const char *filename; ///< The name of the file.
};
/** A token returned by the tokenizer. */
enum Token {
TOKEN_UNKNOWN, ///< Unknown token
TOKEN_END, ///< End of document
TOKEN_EOL, ///< End of line
TOKEN_SHARP, ///< # character, usually telling something important comes.
TOKEN_LOCAL, ///< Read a local include
TOKEN_GLOBAL, ///< Read a global include
TOKEN_IDENTIFIER, ///< Identifier within the data.
TOKEN_DEFINE, ///< (#)define in code
TOKEN_IF, ///< (#)if in code
TOKEN_IFDEF, ///< (#)ifdef in code
TOKEN_IFNDEF, ///< (#)ifndef in code
TOKEN_ELIF, ///< (#)elif in code
TOKEN_ELSE, ///< (#)else in code
TOKEN_ENDIF, ///< (#)endif in code
TOKEN_UNDEF, ///< (#)undef in code
TOKEN_OR, ///< '||' within #if expression
TOKEN_AND, ///< '&&' within #if expression
TOKEN_DEFINED, ///< 'defined' within #if expression
TOKEN_OPEN, ///< '(' within #if expression
TOKEN_CLOSE, ///< ')' within #if expression
TOKEN_NOT, ///< '!' within #if expression
TOKEN_ZERO, ///< '0' within #if expression
TOKEN_INCLUDE, ///< (#)include in code
};
/** Mapping from a C-style keyword representation to a Token. */
typedef std::map<const char*, Token, StringCompare> KeywordList;
/**
* Lexer of a file.
*/
class Lexer {
public:
/**
* Create the lexer and fill the keywords table.
* @param file the file to read from.
*/
Lexer(const File *file) : file(file), current_char('\0'), string(NULL), token(TOKEN_UNKNOWN)
{
this->keywords["define"] = TOKEN_DEFINE;
this->keywords["defined"] = TOKEN_DEFINED;
this->keywords["if"] = TOKEN_IF;
this->keywords["ifdef"] = TOKEN_IFDEF;
this->keywords["ifndef"] = TOKEN_IFNDEF;
this->keywords["include"] = TOKEN_INCLUDE;
this->keywords["elif"] = TOKEN_ELIF;
this->keywords["else"] = TOKEN_ELSE;
this->keywords["endif"] = TOKEN_ENDIF;
this->keywords["undef"] = TOKEN_UNDEF;
/* Initialise currently read character. */
this->Next();
/* Allocate the buffer. */
this->buf_len = 32;
this->buf = (char*)malloc(sizeof(*this->buf) * this->buf_len);
}
/** Free everything */
~Lexer()
{
free(this->buf);
}
/**
* Read the next character into 'current_char'.
*/
void Next()
{
this->current_char = this->file->GetChar();
}
/**
* Get the current token.
* @return the token.
*/
Token GetToken() const
{
return this->token;
}
/**
* Read the currenty processed string.
* @return the string, can be NULL.
*/
const char *GetString() const
{
return this->string;
}
/**
* Perform the lexing/tokenizing of the file till we can return something
* that must be parsed.
*/
void Lex()
{
for (;;) {
free(this->string);
this->string = NULL;
this->token = TOKEN_UNKNOWN;
switch (this->current_char) {
/* '\0' means End-Of-File */
case '\0': this->token = TOKEN_END; return;
/* Skip some chars, as they don't do anything */
case '\t': this->Next(); break;
case '\r': this->Next(); break;
case ' ': this->Next(); break;
case '\\':
this->Next();
if (this->current_char == '\n') this->Next();
break;
case '\n':
this->token = TOKEN_EOL;
this->Next();
return;
case '#':
this->token = TOKEN_SHARP;
this->Next();
return;
case '"':
this->ReadString('"', TOKEN_LOCAL);
this->Next();
return;
case '<':
this->ReadString('>', TOKEN_GLOBAL);
this->Next();
return;
case '&':
this->Next();
if (this->current_char == '&') {
this->Next();
this->token = TOKEN_AND;
return;
}
break;
case '|':
this->Next();
if (this->current_char == '|') {
this->Next();
this->token = TOKEN_OR;
return;
}
break;
case '(':
this->Next();
this->token = TOKEN_OPEN;
return;
case ')':
this->Next();
this->token = TOKEN_CLOSE;
return;
case '!':
this->Next();
if (this->current_char != '=') {
this->token = TOKEN_NOT;
return;
}
break;
/* Possible begin of comment */
case '/':
this->Next();
switch (this->current_char) {
case '*': {
this->Next();
char previous_char = '\0';
while ((this->current_char != '/' || previous_char != '*') && this->current_char != '\0') {
previous_char = this->current_char;
this->Next();
}
this->Next();
break;
}
case '/': while (this->current_char != '\n' && this->current_char != '\0') this->Next(); break;
default: break;
}
break;
default:
if (isalpha(this->current_char) || this->current_char == '_') {
/* If the name starts with a letter, it is an identifier */
this->ReadIdentifier();
return;
}
if (isdigit(this->current_char)) {
bool zero = this->current_char == '0';
this->Next();
if (this->current_char == 'x' || this->current_char == 'X') Next();
while (isdigit(this->current_char) || this->current_char == '.' || (this->current_char >= 'a' && this->current_char <= 'f') || (this->current_char >= 'A' && this->current_char <= 'F')) {
zero &= this->current_char == '0';
this->Next();
}
if (zero) this->token = TOKEN_ZERO;
return;
}
this->Next();
break;
}
}
}
private:
/**
* The token based on keyword with a given name.
* @param name the actual keyword.
* @return the token of the keyword.
*/
Token FindKeyword(const char *name) const
{
KeywordList::const_iterator it = this->keywords.find(name);
if (it == this->keywords.end()) return TOKEN_IDENTIFIER;
return (*it).second;
}
/**
* Read an identifier.
*/
void ReadIdentifier()
{
size_t count = 0;
/* Read the rest of the identifier */
do {
this->buf[count++] = this->current_char;
this->Next();
if (count >= buf_len) {
/* Scale the buffer if required */
this->buf_len *= 2;
this->buf = (char *)realloc(this->buf, sizeof(*this->buf) * this->buf_len);
}
} while ((isalpha(this->current_char) || this->current_char == '_' || isdigit(this->current_char)));
this->buf[count] = '\0';
free(this->string);
this->string = strdup(this->buf);
this->token = FindKeyword(this->string);
}
/**
* Read a string up to a given character, then set the given token.
* @param end the 'marker' for the end of the string.
* @param token the token to set after returning.
*/
void ReadString(char end, Token token)
{
size_t count = 0;
this->Next();
while (this->current_char != end && this->current_char != ')' && this->current_char != '\n' && this->current_char != '\0') {
this->buf[count++] = this->current_char;
this->Next();
if (count >= this->buf_len) {
/* Scale the buffer if required */
this->buf_len *= 2;
this->buf = (char *)realloc(this->buf, sizeof(*this->buf) * this->buf_len);
}
}
this->buf[count] = '\0';
free(this->string);
this->string = strdup(this->buf);
this->token = token;
}
const File *file; ///< The file to read from.
char current_char; ///< The current character to process.
char *string; ///< Currently processed string.
Token token; ///< The current token to process.
char *buf; ///< Temporary buffer.
size_t buf_len; ///< Length of the temporary buffer.
KeywordList keywords; ///< All keywords we know of.
};
/**
* Generate a path from a directory name and a relative filename.
* If the file is not local the include directory names will be used instead
* of the passed parameter with directory name. If the file is local both will
* be queried where the parameter takes precedence.
* @param dirname the directory to look in.
* @param filename the file to look for.
* @param local whether to look locally (in dirname) for the file.
* @return the absolute path, or NULL if the file doesn't exist.
*/
const char *GeneratePath(const char *dirname, const char *filename, bool local)
{
if (local) {
if (access(filename, R_OK) == 0) return strdup(filename);
char path[PATH_MAX];
strcpy(path, dirname);
const char *p = filename;
/* Remove '..' from the begin of the filename. */
while (*p == '.') {
if (*(++p) == '.') {
*(strrchr(path, '/')) = '\0';
p += 2;
}
}
strcat(path, "/");
strcat(path, p);
if (access(path, R_OK) == 0) return strdup(path);
}
for (StringSet::iterator it = _include_dirs.begin(); it != _include_dirs.end(); it++) {
char path[PATH_MAX];
strcpy(path, *it);
const char *p = filename;
/* Remove '..' from the begin of the filename. */
while (*p == '.') {
if (*(++p) == '.') {
*(strrchr(path, '/')) = '\0';
p += 2;
}
}
strcat(path, "/");
strcat(path, p);
if (access(path, R_OK) == 0) return strdup(path);
}
return NULL;
}
/**
* Try to parse a 'defined(expr)' expression.
* @param lexer the lexer to get tokens from.
* @param defines the set of known defines.
* @param verbose whether to give verbose debugging information.
* @return the value of the expression.
*/
bool ExpressionDefined(Lexer *lexer, StringSet *defines, bool verbose);
/**
* Try to parse a 'expr || expr' expression.
* @param lexer the lexer to get tokens from.
* @param defines the set of known defines.
* @param verbose whether to give verbose debugging information.
* @return the value of the expression.
*/
bool ExpressionOr(Lexer *lexer, StringSet *defines, bool verbose);
/**
* Try to parse a '!expr' expression. Also parses the '(expr)', '0' and
* identifiers. Finally it also consumes any unknown tokens.
* @param lexer the lexer to get tokens from.
* @param defines the set of known defines.
* @param verbose whether to give verbose debugging information.
* @return the value of the expression.
*/
bool ExpressionNot(Lexer *lexer, StringSet *defines, bool verbose)
{
if (lexer->GetToken() == TOKEN_NOT) {
if (verbose) fprintf(stderr, "!");
lexer->Lex();
bool value = !ExpressionDefined(lexer, defines, verbose);
if (verbose) fprintf(stderr, "[%d]", value);
return value;
}
if (lexer->GetToken() == TOKEN_OPEN) {
if (verbose) fprintf(stderr, "(");
lexer->Lex();
bool value = ExpressionOr(lexer, defines, verbose);
if (verbose) fprintf(stderr, ")[%d]", value);
lexer->Lex();
return value;
}
if (lexer->GetToken() == TOKEN_ZERO) {
if (verbose) fprintf(stderr, "0");
lexer->Lex();
if (verbose) fprintf(stderr, "[0]");
return false;
}
bool first = true;
while (lexer->GetToken() == TOKEN_UNKNOWN || lexer->GetToken() == TOKEN_IDENTIFIER) {
if (verbose && first) fprintf(stderr, "<assumed true>");
first = false;
lexer->Lex();
}
return true;
}
/**
* Try to parse a 'defined(expr)' expression.
* @param lexer the lexer to get tokens from.
* @param defines the set of known defines.
* @param verbose whether to give verbose debugging information.
* @return the value of the expression.
*/
bool ExpressionDefined(Lexer *lexer, StringSet *defines, bool verbose)
{
bool value = ExpressionNot(lexer, defines, verbose);
if (lexer->GetToken() != TOKEN_DEFINED) return value;
lexer->Lex();
if (verbose) fprintf(stderr, "defined");
bool open = (lexer->GetToken() == TOKEN_OPEN);
if (open) lexer->Lex();
if (verbose) fprintf(stderr, open ? "(" : " ");
if (lexer->GetToken() == TOKEN_IDENTIFIER) {
if (verbose) fprintf(stderr, "%s", lexer->GetString());
value = defines->find(lexer->GetString()) != defines->end();
}
if (open) {
if (verbose) fprintf(stderr, ")");
lexer->Lex();
}
lexer->Lex();
if (verbose) fprintf(stderr, "[%d]", value);
return value;
}
/**
* Try to parse a 'expr && expr' expression.
* @param lexer the lexer to get tokens from.
* @param defines the set of known defines.
* @param verbose whether to give verbose debugging information.
* @return the value of the expression.
*/
bool ExpressionAnd(Lexer *lexer, StringSet *defines, bool verbose)
{
bool value = ExpressionDefined(lexer, defines, verbose);
while (true) {
if (lexer->GetToken() != TOKEN_AND) return value;
if (verbose) fprintf(stderr, " && ");
lexer->Lex();
value = value && ExpressionDefined(lexer, defines, verbose);
}
}
/**
* Try to parse a 'expr || expr' expression.
* @param lexer the lexer to get tokens from.
* @param defines the set of known defines.
* @param verbose whether to give verbose debugging information.
* @return the value of the expression.
*/
bool ExpressionOr(Lexer *lexer, StringSet *defines, bool verbose)
{
bool value = ExpressionAnd(lexer, defines, verbose);
while (true) {
if (lexer->GetToken() != TOKEN_OR) return value;
if (verbose) fprintf(stderr, " || ");
lexer->Lex();
value = value || ExpressionAnd(lexer, defines, verbose);
}
}
/** Enumerator to tell how long to ignore 'stuff'. */
enum Ignore {
NOT_IGNORE, ///< No ignoring.
IGNORE_UNTIL_ELSE, ///< Ignore till a #else is reached.
IGNORE_UNTIL_ENDIF, ///< Ignore till a #endif is reached.
};
/**
* Scan a file for includes, defines and the lot.
* @param filename the name of the file to scan.
* @param ext the extension of the filename.
* @param header whether the file is a header or not.
* @param verbose whether to give verbose debugging information.
*/
void ScanFile(const char *filename, const char *ext, bool header, bool verbose)
{
static StringSet defines;
static std::stack<Ignore> ignore;
/* Copy in the default defines (parameters of depend) */
if (!header) {
for (StringSet::iterator it = _defines.begin(); it != _defines.end(); it++) {
defines.insert(strdup(*it));
}
}
File file(filename);
Lexer lexer(&file);
/* Start the lexing! */
lexer.Lex();
while (lexer.GetToken() != TOKEN_END) {
switch (lexer.GetToken()) {
/* We reached the end of the file... yay, we're done! */
case TOKEN_END: break;
/* The line started with a # (minus whitespace) */
case TOKEN_SHARP:
lexer.Lex();
switch (lexer.GetToken()) {
case TOKEN_INCLUDE:
if (verbose) fprintf(stderr, "%s #include ", filename);
lexer.Lex();
switch (lexer.GetToken()) {
case TOKEN_LOCAL:
case TOKEN_GLOBAL: {
if (verbose) fprintf(stderr, "%s", lexer.GetString());
if (!ignore.empty() && ignore.top() != NOT_IGNORE) {
if (verbose) fprintf(stderr, " (ignored)");
break;
}
const char *h = GeneratePath(file.GetDirname(), lexer.GetString(), lexer.GetToken() == TOKEN_LOCAL);
if (h != NULL) {
StringMap::iterator it = _headers.find(h);
if (it == _headers.end()) {
it = (_headers.insert(StringMapItem(strdup(h), new StringSet()))).first;
if (verbose) fprintf(stderr, "\n");
ScanFile(h, ext, true, verbose);
}
StringMap::iterator curfile;
if (header) {
curfile = _headers.find(filename);
} else {
/* Replace the extension with the provided extension of '.o'. */
char path[PATH_MAX];
strcpy(path, filename);
*(strchr(path, '.')) = '\0';
strcat(path, ext != NULL ? ext : ".o");
curfile = _files.find(path);
if (curfile == _files.end()) {
curfile = (_files.insert(StringMapItem(strdup(path), new StringSet()))).first;
}
}
if (it != _headers.end()) {
for (StringSet::iterator header = it->second->begin(); header != it->second->end(); header++) {
if (curfile->second->find(*header) == curfile->second->end()) curfile->second->insert(strdup(*header));
}
}
if (curfile->second->find(h) == curfile->second->end()) curfile->second->insert(strdup(h));
free((void*)h);
}
}
/* Fall through */
default: break;
}
break;
case TOKEN_DEFINE:
if (verbose) fprintf(stderr, "%s #define ", filename);
lexer.Lex();
if (lexer.GetToken() == TOKEN_IDENTIFIER) {
if (verbose) fprintf(stderr, "%s", lexer.GetString());
if (!ignore.empty() && ignore.top() != NOT_IGNORE) {
if (verbose) fprintf(stderr, " (ignored)");
break;
}
if (defines.find(lexer.GetString()) == defines.end()) defines.insert(strdup(lexer.GetString()));
lexer.Lex();
}
break;
case TOKEN_UNDEF:
if (verbose) fprintf(stderr, "%s #undef ", filename);
lexer.Lex();
if (lexer.GetToken() == TOKEN_IDENTIFIER) {
if (verbose) fprintf(stderr, "%s", lexer.GetString());
if (!ignore.empty() && ignore.top() != NOT_IGNORE) {
if (verbose) fprintf(stderr, " (ignored)");
break;
}
StringSet::iterator it = defines.find(lexer.GetString());
if (it != defines.end()) {
free((void*)*it);
defines.erase(it);
}
lexer.Lex();
}
break;
case TOKEN_ENDIF:
if (verbose) fprintf(stderr, "%s #endif", filename);
lexer.Lex();
if (!ignore.empty()) ignore.pop();
if (verbose) fprintf(stderr, " -> %signore", (!ignore.empty() && ignore.top() != NOT_IGNORE) ? "" : "not ");
break;
case TOKEN_ELSE: {
if (verbose) fprintf(stderr, "%s #else", filename);
lexer.Lex();
Ignore last = ignore.empty() ? NOT_IGNORE : ignore.top();
if (!ignore.empty()) ignore.pop();
if (ignore.empty() || ignore.top() == NOT_IGNORE) {
ignore.push(last == IGNORE_UNTIL_ELSE ? NOT_IGNORE : IGNORE_UNTIL_ENDIF);
} else {
ignore.push(IGNORE_UNTIL_ENDIF);
}
if (verbose) fprintf(stderr, " -> %signore", (!ignore.empty() && ignore.top() != NOT_IGNORE) ? "" : "not ");
break;
}
case TOKEN_ELIF: {
if (verbose) fprintf(stderr, "%s #elif ", filename);
lexer.Lex();
Ignore last = ignore.empty() ? NOT_IGNORE : ignore.top();
if (!ignore.empty()) ignore.pop();
if (ignore.empty() || ignore.top() == NOT_IGNORE) {
bool value = ExpressionOr(&lexer, &defines, verbose);
ignore.push(last == IGNORE_UNTIL_ELSE ? (value ? NOT_IGNORE : IGNORE_UNTIL_ELSE) : IGNORE_UNTIL_ENDIF);
} else {
ignore.push(IGNORE_UNTIL_ENDIF);
}
if (verbose) fprintf(stderr, " -> %signore", (!ignore.empty() && ignore.top() != NOT_IGNORE) ? "" : "not ");
break;
}
case TOKEN_IF: {
if (verbose) fprintf(stderr, "%s #if ", filename);
lexer.Lex();
if (ignore.empty() || ignore.top() == NOT_IGNORE) {
bool value = ExpressionOr(&lexer, &defines, verbose);
ignore.push(value ? NOT_IGNORE : IGNORE_UNTIL_ELSE);
} else {
ignore.push(IGNORE_UNTIL_ENDIF);
}
if (verbose) fprintf(stderr, " -> %signore", (!ignore.empty() && ignore.top() != NOT_IGNORE) ? "" : "not ");
break;
}
case TOKEN_IFDEF:
if (verbose) fprintf(stderr, "%s #ifdef ", filename);
lexer.Lex();
if (lexer.GetToken() == TOKEN_IDENTIFIER) {
bool value = defines.find(lexer.GetString()) != defines.end();
if (verbose) fprintf(stderr, "%s[%d]", lexer.GetString(), value);
if (ignore.empty() || ignore.top() == NOT_IGNORE) {
ignore.push(value ? NOT_IGNORE : IGNORE_UNTIL_ELSE);
} else {
ignore.push(IGNORE_UNTIL_ENDIF);
}
}
if (verbose) fprintf(stderr, " -> %signore", (!ignore.empty() && ignore.top() != NOT_IGNORE) ? "" : "not ");
break;
case TOKEN_IFNDEF:
if (verbose) fprintf(stderr, "%s #ifndef ", filename);
lexer.Lex();
if (lexer.GetToken() == TOKEN_IDENTIFIER) {
bool value = defines.find(lexer.GetString()) != defines.end();
if (verbose) fprintf(stderr, "%s[%d]", lexer.GetString(), value);
if (ignore.empty() || ignore.top() == NOT_IGNORE) {
ignore.push(!value ? NOT_IGNORE : IGNORE_UNTIL_ELSE);
} else {
ignore.push(IGNORE_UNTIL_ENDIF);
}
}
if (verbose) fprintf(stderr, " -> %signore", (!ignore.empty() && ignore.top() != NOT_IGNORE) ? "" : "not ");
break;
default:
if (verbose) fprintf(stderr, "%s #<unknown>", filename);
lexer.Lex();
break;
}
if (verbose) fprintf(stderr, "\n");
/* Fall through */
default:
/* Ignore the rest of the garbage on this line */
while (lexer.GetToken() != TOKEN_EOL && lexer.GetToken() != TOKEN_END) lexer.Lex();
lexer.Lex();
break;
}
}
if (!header) {
for (StringSet::iterator it = defines.begin(); it != defines.end(); it++) {
free((void*)*it);
}
defines.clear();
while (!ignore.empty()) ignore.pop();
}
}
/**
* Entry point. Arguably the most common function in all applications.
* @param argc the number of arguments.
* @param argv the actual arguments.
* @return return value for the caller to tell we succeed or not.
*/
int main(int argc, char *argv[])
{
bool ignorenext = true;
char *filename = NULL;
char *ext = NULL;
bool append = false;
bool verbose = false;
for (int i = 0; i < argc; i++) {
if (ignorenext) {
ignorenext = false;
continue;
}
if (argv[i][0] == '-') {
/* Append */
if (strncmp(argv[i], "-a", 2) == 0) append = true;
/* Include dir */
if (strncmp(argv[i], "-I", 2) == 0) {
if (argv[i][2] == '\0') {
i++;
_include_dirs.insert(strdup(argv[i]));
} else {
_include_dirs.insert(strdup(&argv[i][2]));
}
continue;
}
/* Define */
if (strncmp(argv[i], "-D", 2) == 0) {
char *p = strchr(argv[i], '=');
if (p != NULL) *p = '\0';
_defines.insert(strdup(&argv[i][2]));
continue;
}
/* Output file */
if (strncmp(argv[i], "-f", 2) == 0) {
if (filename != NULL) continue;
filename = strdup(&argv[i][2]);
continue;
}
/* Object file extension */
if (strncmp(argv[i], "-o", 2) == 0) {
if (ext != NULL) continue;
ext = strdup(&argv[i][2]);
continue;
}
/* Verbose */
if (strncmp(argv[i], "-v", 2) == 0) verbose = true;
continue;
}
ScanFile(argv[i], ext, false, verbose);
}
/* Default output file is Makefile */
if (filename == NULL) filename = strdup("Makefile");
char backup[PATH_MAX];
strcpy(backup, filename);
strcat(backup, ".bak");
char *content = NULL;
long size = 0;
/* Read in the current file; so we can overwrite everything from the
* end of non-depend data marker down till the end. */
FILE *src = fopen(filename, "rb");
if (src != NULL) {
fseek(src, 0, SEEK_END);
size = ftell(src);
rewind(src);
content = (char*)malloc(size * sizeof(*content));
fread(content, 1, size, src);
fclose(src);
}
FILE *dst = fopen(backup, "wb");
if (content != NULL) fwrite(content, 1, size, dst);
fclose(dst);
/* Then append it to the real file. */
src = fopen(backup, "r");
dst = fopen(filename, "w");
while (fgets(content, size, src) != NULL) {
fputs(content, dst);
if (!append && !strncmp(content, "# DO NOT DELETE", 15)) break;
}
if (ftell(src) == 0) fprintf(dst, "\n# DO NOT DELETE\n");
for (StringMap::iterator it = _files.begin(); it != _files.end(); it++) {
for (StringSet::iterator h = it->second->begin(); h != it->second->end(); h++) {
fprintf(dst, "%s: %s\n", it->first, *h);
}
}
/* Clean up our mess. */
fclose(dst);
fclose(src);
free(filename);
free(ext);
free(content);
for (StringMap::iterator it = _files.begin(); it != _files.end(); it++) {
for (StringSet::iterator h = it->second->begin(); h != it->second->end(); h++) {
free((void*)*h);
}
it->second->clear();
delete it->second;
free((void*)it->first);
}
_files.clear();
for (StringMap::iterator it = _headers.begin(); it != _headers.end(); it++) {
for (StringSet::iterator h = it->second->begin(); h != it->second->end(); h++) {
free((void*)*h);
}
it->second->clear();
delete it->second;
free((void*)it->first);
}
_headers.clear();
for (StringSet::iterator it = _defines.begin(); it != _defines.end(); it++) {
free((void*)*it);
}
_defines.clear();
for (StringSet::iterator it = _include_dirs.begin(); it != _include_dirs.end(); it++) {
free((void*)*it);
}
_include_dirs.clear();
return 0;
}
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