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dinifile.d
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dinifile.d
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/**
* Compiler implementation of the
* $(LINK2 http://www.dlang.org, D programming language).
*
* Copyright: Copyright (C) 1994-1998 by Symantec
* Copyright (C) 2000-2018 by The D Language Foundation, All Rights Reserved
* Authors: $(LINK2 http://www.digitalmars.com, Walter Bright)
* License: $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0)
* Source: $(LINK2 https://github.com/dlang/dmd/blob/master/src/dmd/dinifile.d, _dinifile.d)
* Documentation: https://dlang.org/phobos/dmd_dinifile.html
* Coverage: https://codecov.io/gh/dlang/dmd/src/master/src/dmd/dinifile.d
*/
module dmd.dinifile;
import core.stdc.ctype;
import core.stdc.string;
import core.sys.posix.stdlib;
import core.sys.windows.windows;
import dmd.errors;
import dmd.globals;
import dmd.root.filename;
import dmd.root.outbuffer;
import dmd.root.port;
import dmd.root.stringtable;
import dmd.utils;
version (Windows) extern (C) int putenv(const char*);
private enum LOG = false;
/*****************************
* Find the config file
* Params:
* argv0 = program name (argv[0])
* inifile = .ini file name
* Returns:
* file path of the config file or NULL
* Note: this is a memory leak
*/
const(char)[] findConfFile(const(char)[] argv0, const(char)[] inifile)
{
static if (LOG)
{
printf("findinifile(argv0 = '%.*s', inifile = '%.*s')\n",
argv0.length, argv0.ptr, inifile.length, inifile.ptr);
}
if (FileName.absolute(inifile))
return inifile;
if (FileName.exists(inifile))
return inifile;
/* Look for inifile in the following sequence of places:
* o current directory
* o home directory
* o exe directory (windows)
* o directory off of argv0
* o SYSCONFDIR=/etc (non-windows)
*/
auto filename = FileName.combine(getenv("HOME").toDString, inifile);
if (FileName.exists(filename))
return filename;
version (Windows)
{
// This fix by Tim Matthews
char[MAX_PATH + 1] resolved_name;
const len = GetModuleFileNameA(null, resolved_name.ptr, MAX_PATH + 1);
if (len && FileName.exists(resolved_name[0 .. len]))
{
filename = FileName.replaceName(resolved_name[0 .. len], inifile);
if (FileName.exists(filename))
return filename;
}
}
filename = FileName.replaceName(argv0, inifile);
if (FileName.exists(filename))
return filename;
version (Posix)
{
// Search PATH for argv0
const p = getenv("PATH");
static if (LOG)
{
printf("\tPATH='%s'\n", p);
}
auto paths = FileName.splitPath(p);
auto abspath = FileName.searchPath(paths, argv0, false);
if (abspath)
{
auto absname = FileName.replaceName(abspath, inifile);
if (FileName.exists(absname))
return absname;
}
// Resolve symbolic links
filename = FileName.canonicalName(abspath ? abspath : argv0);
if (filename)
{
filename = FileName.replaceName(filename, inifile);
if (FileName.exists(filename))
return filename;
}
// Search SYSCONFDIR=/etc for inifile
filename = FileName.combine(import("SYSCONFDIR.imp"), inifile);
}
return filename;
}
/**********************************
* Read from environment, looking for cached value first.
* Params:
* environment = cached copy of the environment
* name = name to look for
* Returns:
* environment value corresponding to name
*/
const(char)* readFromEnv(StringTable* environment, const(char)* name)
{
const len = strlen(name);
auto sv = environment.lookup(name, len);
if (sv && sv.ptrvalue)
return cast(const(char)*)sv.ptrvalue; // get cached value
return getenv(name);
}
/*********************************
* Write to our copy of the environment, not the real environment
*/
private bool writeToEnv(StringTable* environment, char* nameEqValue)
{
auto p = strchr(nameEqValue, '=');
if (!p)
return false;
auto sv = environment.update(nameEqValue, p - nameEqValue);
sv.ptrvalue = cast(void*)(p + 1);
return true;
}
/************************************
* Update real environment with our copy.
* Params:
* environment = our copy of the environment
*/
void updateRealEnvironment(StringTable* environment)
{
static int envput(const(StringValue)* sv)
{
const name = sv.toDchars();
const namelen = strlen(name);
const value = cast(const(char)*)sv.ptrvalue;
if (!value) // deleted?
return 0;
const valuelen = strlen(value);
auto s = cast(char*)malloc(namelen + 1 + valuelen + 1);
assert(s);
memcpy(s, name, namelen);
s[namelen] = '=';
memcpy(s + namelen + 1, value, valuelen);
s[namelen + 1 + valuelen] = 0;
//printf("envput('%s')\n", s);
putenv(s);
return 0; // do all of them
}
environment.apply(&envput);
}
/*****************************
* Read and analyze .ini file.
* Write the entries into environment as
* well as any entries in one of the specified section(s).
*
* Params:
* environment = our own cache of the program environment
* filename = name of the file being parsed
* path = what @P will expand to
* length = length of the configuration file buffer
* buffer = contents of configuration file
* sections = section names
*/
void parseConfFile(StringTable* environment, const(char)* filename, const(char)* path, size_t length, ubyte* buffer, Strings* sections)
{
/********************
* Skip spaces.
*/
static inout(char)* skipspace(inout(char)* p)
{
while (isspace(*p))
p++;
return p;
}
// Parse into lines
bool envsection = true; // default is to read
OutBuffer buf;
bool eof = false;
int lineNum = 0;
for (size_t i = 0; i < length && !eof; i++)
{
Lstart:
size_t linestart = i;
for (; i < length; i++)
{
switch (buffer[i])
{
case '\r':
break;
case '\n':
// Skip if it was preceded by '\r'
if (i && buffer[i - 1] == '\r')
{
i++;
goto Lstart;
}
break;
case 0:
case 0x1A:
eof = true;
break;
default:
continue;
}
break;
}
++lineNum;
buf.reset();
// First, expand the macros.
// Macros are bracketed by % characters.
Kloop:
for (size_t k = 0; k < i - linestart; ++k)
{
// The line is buffer[linestart..i]
char* line = cast(char*)&buffer[linestart];
if (line[k] == '%')
{
foreach (size_t j; k + 1 .. i - linestart)
{
if (line[j] != '%')
continue;
if (j - k == 3 && Port.memicmp(&line[k + 1], "@P", 2) == 0)
{
// %@P% is special meaning the path to the .ini file
auto p = path;
if (!*p)
p = ".";
buf.writestring(p);
}
else
{
auto len2 = j - k;
auto p = cast(char*)malloc(len2);
len2--;
memcpy(p, &line[k + 1], len2);
p[len2] = 0;
Port.strupr(p);
const penv = readFromEnv(environment, p);
if (penv)
buf.writestring(penv);
free(p);
}
k = j;
continue Kloop;
}
}
buf.writeByte(line[k]);
}
// Remove trailing spaces
const slice = buf.peekSlice();
auto slicelen = slice.length;
while (slicelen && isspace(slice[slicelen - 1]))
--slicelen;
buf.setsize(slicelen);
auto p = buf.peekString();
// The expanded line is in p.
// Now parse it for meaning.
p = skipspace(p);
switch (*p)
{
case ';':
// comment
case 0:
// blank
break;
case '[':
// look for [Environment]
p = skipspace(p + 1);
char* pn;
for (pn = p; isalnum(*pn); pn++)
{
}
if (*skipspace(pn) != ']')
{
// malformed [sectionname], so just say we're not in a section
envsection = false;
break;
}
/* Search sectionnamev[] for p..pn and set envsection to true if it's there
*/
for (size_t j = 0; 1; ++j)
{
if (j == sections.dim)
{
// Didn't find it
envsection = false;
break;
}
const sectionname = (*sections)[j];
const len = strlen(sectionname);
if (pn - p == len && Port.memicmp(p, sectionname, len) == 0)
{
envsection = true;
break;
}
}
break;
default:
if (envsection)
{
auto pn = p;
// Convert name to upper case;
// remove spaces bracketing =
for (; *p; p++)
{
if (islower(*p))
*p &= ~0x20;
else if (isspace(*p))
{
memmove(p, p + 1, strlen(p));
p--;
}
else if (p[0] == '?' && p[1] == '=')
{
*p = '\0';
if (readFromEnv(environment, pn))
{
pn = null;
break;
}
// remove the '?' and resume parsing starting from
// '=' again so the regular variable format is
// parsed
memmove(p, p + 1, strlen(p + 1) + 1);
p--;
}
else if (*p == '=')
{
p++;
while (isspace(*p))
memmove(p, p + 1, strlen(p));
break;
}
}
if (pn)
{
if (!writeToEnv(environment, strdup(pn)))
{
error(Loc(filename, lineNum, 0), "Use `NAME=value` syntax, not `%s`", pn);
fatal();
}
static if (LOG)
{
printf("\tputenv('%s')\n", pn);
//printf("getenv(\"TEST\") = '%s'\n",getenv("TEST"));
}
}
}
break;
}
}
}