snes9x/conffile.cpp

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/*****************************************************************************\
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
This file is licensed under the Snes9x License.
For further information, consult the LICENSE file in the root directory.
\*****************************************************************************/
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#include <stdio.h>
#include <time.h>
#include <string.h>
#include <string>
#include "conffile.h"
#ifdef __WIN32__
#define snprintf _snprintf // needs ANSI compliant name
#endif
#define SORT_SECTIONS_BY_SIZE // output
using namespace std;
bool ConfigFile::defaultAutoAdd = false;
bool ConfigFile::niceAlignment = false;
bool ConfigFile::showComments = true;
bool ConfigFile::alphaSort = true;
bool ConfigFile::timeSort = false;
static ConfigFile* curConfigFile = NULL; // for section_then_key_less
ConfigFile::ConfigFile(void) {
Clear();
}
void ConfigFile::Clear(void){
data.clear();
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sectionSizes.ClearSections();
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linectr = 0;
}
bool ConfigFile::LoadFile(const char *filename){
FSTREAM s;
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bool ret=false;
const char *n, *n2;
if((s=OPEN_FSTREAM(filename, "r"))){
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n=filename;
n2=strrchr(n, '/'); if(n2!=NULL) n=n2+1;
n2=strrchr(n, '\\'); if(n2!=NULL) n=n2+1;
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fStream fS(s);
LoadFile(&fS, n);
CLOSE_FSTREAM(s);
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ret = true;
} else {
fprintf(stderr, "Couldn't open conffile ");
perror(filename);
}
return ret;
}
void ConfigFile::LoadFile(Stream *r, const char *name){
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curConfigFile = this;
string l, key, val;
string section;
string comment;
int i, line, line2;
bool eof;
line=line2=0;
section.clear();
do {
line=line2++;
l=r->getline(eof);
ConfigEntry::trim(l);
if(l.size()==0) continue;
if(l[0]=='#' || l[0]==';'){
// comment
continue;
}
if(l[0]=='['){
if(*l.rbegin()!=']'){
if(name) fprintf(stderr, "%s:", name);
fprintf(stderr, "[%d]: Ignoring invalid section header\n", line);
continue;
}
section.assign(l, 1, l.size()-2);
continue;
}
while(*l.rbegin()=='\\'){
l.erase(l.size()-1);
line2++;
val=r->getline(eof);
if(eof){
fprintf(stderr, "Unexpected EOF reading config file");
if(name) fprintf(stderr, " '%s'", name);
fprintf(stderr, "\n");
return;
}
ConfigEntry::trim(val);
l+=val;
}
i=l.find('=');
if(i<0){
if(name) fprintf(stderr, "%s:", name);
fprintf(stderr, "[%d]: Ignoring invalid entry\n", line);
continue;
}
key=l.substr(0,i); ConfigEntry::trim(key);
val=l.substr(i+1); comment = ConfigEntry::trimCommented(val);
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if(val.size() > 0 && val[0]=='"' && *val.rbegin()=='"') val=val.substr(1, val.size()-2);
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ConfigEntry e(line, section, key, val);
e.comment = comment;
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if(data.erase(e))
sectionSizes.DecreaseSectionSize(e.section);
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data.insert(e);
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sectionSizes.IncreaseSectionSize(e.section);
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} while(!eof);
curConfigFile = NULL;
}
bool ConfigFile::SaveTo(const char *filename){
string section;
FILE *fp;
if((fp=fopen(filename, "w"))==NULL){
fprintf(stderr, "Couldn't write conffile ");
perror(filename);
return false;
}
curConfigFile = this;
section.clear();
set<ConfigEntry, ConfigEntry::line_less> tmp;
fprintf(fp, "# Config file output by snes9x\n");
time_t t=time(NULL);
fprintf(fp, "# %s", ctime(&t));
#ifdef SORT_SECTIONS_BY_SIZE
std::set<ConfigEntry, ConfigEntry::section_then_key_less> data2;
for(set<ConfigEntry, ConfigEntry::key_less>::iterator k=data.begin(); k!=data.end(); k++){
ConfigEntry e (k->line, k->section, k->key, k->val); e.comment = k->comment;
data2.insert(e);
}
#else
#define data2 data
#define section_then_key_less key_less
#endif
for(set<ConfigEntry, ConfigEntry::section_then_key_less>::iterator j=data2.begin(); ; j++){
if(j==data2.end() || j->section!=section){
if(!tmp.empty()){
fprintf(fp, "\n[%s]\n", section.c_str());
unsigned int maxKeyLen=0, maxValLen=0; int maxLeftDiv=0; int maxRightDiv=-1;
if(niceAlignment){
for(set<ConfigEntry, ConfigEntry::line_less>::iterator i=tmp.begin(); i!=tmp.end(); i++){
int len3 = i->key.find_last_of(':');
maxRightDiv = MAX(maxRightDiv, len3);
len3 = i->key.length() - len3;
maxLeftDiv = MAX(maxLeftDiv, len3);
maxKeyLen = MAX(maxKeyLen, i->key.length()+3);
if(showComments){
string o=i->val; ConfigEntry::trim(o);
unsigned int len = o.length();
for(signed int j=len-1;j>=0;j--) if(o.at(j)=='#') len++;
if(o!=i->val) len+=2;
maxValLen = MAX(maxValLen, len);
}
}
if(maxValLen>48) maxValLen=48; // limit spacing
}
for(set<ConfigEntry, ConfigEntry::line_less>::iterator i=tmp.begin(); i!=tmp.end(); i++){
string o=i->val; ConfigEntry::trim(o);
if(o!=i->val) o="\""+i->val+"\"";
int off=0, len3=0;
for(;;){
int k=o.find('#',off);
if(k>=0){
o.insert(k,1,'#'); // re-double any comment characters
off=k+2;
if(off<(int)o.length()) continue;
}
break;
}
if(niceAlignment){
len3=i->key.find_last_of(':');
int len3sub=0;
if(len3 < maxRightDiv){
for(int j=len3;j<maxRightDiv;j++) fputc(' ',fp);
len3sub=maxRightDiv-len3;
len3 = maxRightDiv;
}
len3+=maxLeftDiv-i->key.length();
for(unsigned int j=i->key.length()+len3+3;j<maxKeyLen;j++) fputc(' ',fp);
fprintf(fp, "%s", i->key.c_str());
for(int j=0;j<len3-len3sub;j++) fputc(' ',fp);
fprintf(fp, " = %s", o.c_str());
} else
fprintf(fp, "%s = %s", i->key.c_str(), o.c_str());
if(showComments && !i->comment.empty()){
if(niceAlignment) for(unsigned int j=o.length();j<maxValLen;j++) fputc(' ',fp);
fprintf(fp, " # %s", i->comment.c_str());
}
fprintf(fp, "\n");
}
}
if(j==data2.end()) break;
section=j->section;
tmp.clear();
}
tmp.insert(*j);
}
curConfigFile = NULL;
#undef data2
#undef section_then_key_less
if(ferror(fp))
{
printf ("Error writing config file %s\n", filename);
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}
fclose(fp);
return true;
}
/***********************************************/
string ConfigFile::Get(const char *key){
set<ConfigEntry, ConfigEntry::key_less>::iterator i;
i=data.find(ConfigEntry(key));
i->used=true;
return i->val;
}
bool ConfigFile::Has(const char *key){
return data.find(ConfigEntry(key))!=data.end();
}
// exists and isn't completely empty (any side-effects are intentional)
bool ConfigFile::Exists(const char *key){
const char* val = GetString(key, NULL);
return val && *val;
}
string ConfigFile::GetString(const char *key, string def){
if(!Exists(key))
return def;
return Get(key);
}
char *ConfigFile::GetString(const char *key, char *out, uint32 outlen){
if(!Exists(key)) return NULL;
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memset(out, 0, outlen);
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string o=Get(key);
if(outlen>0){
outlen--;
if(o.size()<outlen) outlen=o.size();
memcpy(out, o.data(), outlen);
}
return out;
}
const char *ConfigFile::GetString(const char *key, const char *def){
set<ConfigEntry, ConfigEntry::key_less>::iterator i;
i=data.find(ConfigEntry(key));
if(i==data.end())
{
if(defaultAutoAdd) SetString(key,""); //SetString(key, def?def:"");
return def;
}
i->used=true;
// This should be OK, until this key gets removed
const std::string &iVal = i->val;
return iVal.c_str();
}
char *ConfigFile::GetStringDup(const char *key, const char *def){
const char *c=GetString(key, def);
if(c==NULL) return NULL;
return strdup(c);
}
bool ConfigFile::SetString(const char *key, string val, const char *comment){
set<ConfigEntry, ConfigEntry::key_less>::iterator i;
bool ret=false;
bool found;
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ConfigEntry e(key, val);
if(comment && *comment) e.comment = comment;
e.used=true;
i=data.find(e);
found=(i==data.end());
if(!found){
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e.line=i->line;
data.erase(e);
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sectionSizes.DecreaseSectionSize(e.section);
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ret=true;
}
if((found && (!alphaSort || timeSort)) || (!alphaSort && timeSort))
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e.line = linectr++;
data.insert(e);
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sectionSizes.IncreaseSectionSize(e.section);
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return ret;
}
int32 ConfigFile::GetInt(const char *key, int32 def, bool *bad){
if(bad) *bad=false;
if(!Exists(key))
return def;
char *c;
int32 i;
string o=Get(key);
i=strtol(o.c_str(), &c, 10);
if(c!=NULL && *c!='\0'){
i=def;
if(bad) *bad=true;
}
return i;
}
bool ConfigFile::SetInt(const char *key, int32 val, const char *comment){
char buf[20];
snprintf(buf, sizeof(buf), "%d", (int)val);
return SetString(key, buf, comment);
}
uint32 ConfigFile::GetUInt(const char *key, uint32 def, int base, bool *bad){
if(bad) *bad=false;
if(!Exists(key))
return def;
if(base!=8 && base!=10 && base!=16) base=0;
char *c;
uint32 i;
string o=Get(key);
i=strtol(o.c_str(), &c, base);
if(c!=NULL && *c!='\0'){
i=def;
if(bad) *bad=true;
}
return i;
}
bool ConfigFile::SetUInt(const char *key, uint32 val, int base, const char *comment){
char buf[20];
switch(base){
case 10:
default:
snprintf(buf, sizeof(buf), "%u", (unsigned int)val);
break;
case 8:
snprintf(buf, sizeof(buf), "%#o", (unsigned int)val);
break;
case 16:
snprintf(buf, sizeof(buf), "%#x", (unsigned int)val);
break;
}
return SetString(key, buf, comment);
}
bool ConfigFile::GetBool(const char *key, bool def, bool *bad){
if(bad) *bad=false;
if(!Exists(key))
return def;
string o=Get(key);
const char *c=o.c_str();
if(!strcasecmp(c, "true") || !strcasecmp(c, "1") || !strcasecmp(c, "yes") || !strcasecmp(c, "on")) return true;
if(!strcasecmp(c, "false") || !strcasecmp(c, "0") || !strcasecmp(c, "no") || !strcasecmp(c, "off")) return false;
if(bad) *bad=true;
return def;
}
bool ConfigFile::SetBool(const char *key, bool val, const char *true_val, const char *false_val, const char *comment){
return SetString(key, val?true_val:false_val, comment);
}
const char* ConfigFile::GetComment(const char *key)
{
set<ConfigEntry, ConfigEntry::key_less>::iterator i;
i=data.find(ConfigEntry(key));
if(i==data.end())
return NULL;
// This should be OK, until this key gets removed
const std::string &iCom = i->comment;
return iCom.c_str();
}
bool ConfigFile::DeleteKey(const char *key){
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ConfigEntry e = ConfigEntry(key);
if(data.erase(e)) {
sectionSizes.DecreaseSectionSize(e.section);
return true;
}
return false;
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}
/***********************************************/
bool ConfigFile::DeleteSection(const char *section){
set<ConfigEntry, ConfigEntry::key_less>::iterator s, e;
for(s=data.begin(); s!=data.end() && s->section!=section; s++) ;
if(s==data.end()) return false;
for(e=s; e!=data.end() && e->section==section; e++) ;
data.erase(s, e);
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sectionSizes.DeleteSection(section);
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return true;
}
ConfigFile::secvec_t ConfigFile::GetSection(const char *section){
secvec_t v;
set<ConfigEntry, ConfigEntry::key_less>::iterator i;
v.clear();
for(i=data.begin(); i!=data.end(); i++){
if(i->section!=section) continue;
v.push_back(std::pair<string,string>(i->key, i->val));
}
return v;
}
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int ConfigFile::GetSectionSize(const std::string section){
return sectionSizes.GetSectionSize(section);
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}
// Clears all key-value pairs that didn't receive a "Get" or "Exists" command
void ConfigFile::ClearUnused()
{
set<ConfigEntry, ConfigEntry::key_less>::iterator i;
again:
for(i=data.begin(); i!=data.end(); i++){
if(!i->used){
data.erase(i);
goto again;
}
}
}
void ConfigFile::ClearLines()
{
set<ConfigEntry, ConfigEntry::key_less>::iterator i;
for(i=data.begin(); i!=data.end(); i++){
*(const_cast<int*>(&i->line)) = -1;
}
}
bool ConfigFile::ConfigEntry::section_then_key_less::operator()(const ConfigEntry &a, const ConfigEntry &b) {
if(curConfigFile && a.section!=b.section){
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const int sva = curConfigFile->GetSectionSize(a.section);
const int svb = curConfigFile->GetSectionSize(b.section);
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if(sva<svb) return true;
if(sva>svb) return false;
return a.section<b.section;
}
return a.key<b.key;
}
void ConfigFile::SetDefaultAutoAdd(bool autoAdd)
{
defaultAutoAdd = autoAdd;
}
void ConfigFile::SetNiceAlignment(bool align)
{
niceAlignment = align;
}
void ConfigFile::SetShowComments(bool show)
{
showComments = show;
}
void ConfigFile::SetAlphaSort(bool sort)
{
alphaSort = sort;
}
void ConfigFile::SetTimeSort(bool sort)
{
timeSort = sort;
}