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@ r10044:a1e2a7856c4e
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Location: cpp/openttd-patchpack/source/src/ini.cpp
r10044:a1e2a7856c4e
5.9 KiB
text/x-c
(svn r14204) -Fix (r7475): when determining length of a string with limited size, first check if we are not out of bounds already
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/** @file ini.cpp Definition of the IniItem class, related to reading/writing '*.ini' files. */
#include "stdafx.h"
#include "core/alloc_func.hpp"
#include "core/math_func.hpp"
#include "debug.h"
#include "ini_type.h"
#include "string_func.h"
#include "fileio_func.h"
IniItem::IniItem(IniGroup *parent, const char *name, size_t len) : next(NULL), value(NULL), comment(NULL)
{
if (len == 0) len = strlen(name);
this->name = strndup(name, len);
*parent->last_item = this;
parent->last_item = &this->next;
}
IniItem::~IniItem()
{
free(this->name);
free(this->value);
free(this->comment);
delete this->next;
}
void IniItem::SetValue(const char *value)
{
free(this->value);
this->value = strdup(value);
}
IniGroup::IniGroup(IniFile *parent, const char *name, size_t len) : next(NULL), type(IGT_VARIABLES), item(NULL), comment(NULL)
{
if (len == 0) len = strlen(name);
this->name = strndup(name, len);
this->last_item = &this->item;
*parent->last_group = this;
parent->last_group = &this->next;
if (parent->list_group_names == NULL) return;
for (uint i = 0; parent->list_group_names[i] != NULL; i++) {
if (strcmp(this->name, parent->list_group_names[i]) == 0) {
this->type = IGT_LIST;
return;
}
}
}
IniGroup::~IniGroup()
{
free(this->name);
free(this->comment);
delete this->item;
delete this->next;
}
IniItem *IniGroup::GetItem(const char *name, bool create)
{
IniItem *item;
size_t len = strlen(name);
for (item = this->item; item != NULL; item = item->next) {
if (strcmp(item->name, name) == 0) return item;
}
if (!create) return NULL;
/* otherwise make a new one */
return new IniItem(this, name, len);
}
IniFile::IniFile(const char **list_group_names) : group(NULL), comment(NULL), list_group_names(list_group_names)
{
this->last_group = &this->group;
}
IniFile::~IniFile()
{
free(this->comment);
delete this->group;
}
IniGroup *IniFile::GetGroup(const char *name, size_t len)
{
IniGroup *group;
if (len == 0) len = strlen(name);
/* does it exist already? */
for (group = this->group; group != NULL; group = group->next) {
if (!memcmp(group->name, name, len) && group->name[len] == 0) {
return group;
}
}
/* otherwise make a new one */
group = new IniGroup(this, name, len);
group->comment = strdup("\n");
return group;
}
void IniFile::RemoveGroup(const char *name)
{
size_t len = strlen(name);
IniGroup *prev = NULL;
IniGroup *group;
/* does it exist already? */
for (group = this->group; group != NULL; prev = group, group = group->next) {
if (memcmp(group->name, name, len) == 0) {
break;
}
}
if (group == NULL) return;
if (prev != NULL) {
prev->next = prev->next->next;
} else {
this->group = this->group->next;
prev = this->group;
}
group->next = NULL;
delete group;
}
void IniFile::LoadFromDisk(const char *filename)
{
assert(this->last_group == &this->group);
char buffer[1024], c, *s, *t, *e;
IniGroup *group = NULL;
IniItem *item = NULL;
char *comment = NULL;
uint comment_size = 0;
uint comment_alloc = 0;
size_t end;
FILE *in = FioFOpenFile(filename, "r", DATA_DIR, &end);
if (in == NULL) return;
end += ftell(in);
/* for each line in the file */
while ((size_t)ftell(in) < end && fgets(buffer, sizeof(buffer), in)) {
/* trim whitespace from the left side */
for (s = buffer; *s == ' ' || *s == '\t'; s++) {}
/* trim whitespace from right side. */
e = s + strlen(s);
while (e > s && ((c = e[-1]) == '\n' || c == '\r' || c == ' ' || c == '\t')) e--;
*e = '\0';
/* skip comments and empty lines */
if (*s == '#' || *s == ';' || *s == '\0') {
uint ns = comment_size + (e - s + 1);
uint a = comment_alloc;
uint pos;
/* add to comment */
if (ns > a) {
a = max(a, 128U);
do a *= 2; while (a < ns);
comment = ReallocT(comment, comment_alloc = a);
}
pos = comment_size;
comment_size += (e - s + 1);
comment[pos + e - s] = '\n'; // comment newline
memcpy(comment + pos, s, e - s); // copy comment contents
continue;
}
/* it's a group? */
if (s[0] == '[') {
if (e[-1] != ']') {
ShowInfoF("ini: invalid group name '%s'", buffer);
} else {
e--;
}
s++; // skip [
group = new IniGroup(this, s, e - s);
if (comment_size) {
group->comment = strndup(comment, comment_size);
comment_size = 0;
}
} else if (group) {
/* find end of keyname */
if (*s == '\"') {
s++;
for (t = s; *t != '\0' && *t != '\"'; t++) {}
if (*t == '\"') *t = ' ';
} else {
for (t = s; *t != '\0' && *t != '=' && *t != '\t' && *t != ' '; t++) {}
}
/* it's an item in an existing group */
item = new IniItem(group, s, t-s);
if (comment_size) {
item->comment = strndup(comment, comment_size);
comment_size = 0;
}
/* find start of parameter */
while (*t == '=' || *t == ' ' || *t == '\t') t++;
/* remove starting quotation marks */
if (*t == '\"') t++;
/* remove ending quotation marks */
e = t + strlen(t);
if (e > t && e[-1] == '\"') e--;
*e = '\0';
item->value = strndup(t, e - t);
} else {
/* it's an orphan item */
ShowInfoF("ini: '%s' outside of group", buffer);
}
}
if (comment_size > 0) {
this->comment = strndup(comment, comment_size);
comment_size = 0;
}
free(comment);
fclose(in);
}
bool IniFile::SaveToDisk(const char *filename)
{
FILE *f;
IniGroup *group;
IniItem *item;
f = fopen(filename, "w");
if (f == NULL) return false;
for (group = this->group; group != NULL; group = group->next) {
if (group->comment) fputs(group->comment, f);
fprintf(f, "[%s]\n", group->name);
for (item = group->item; item != NULL; item = item->next) {
assert(item->value != NULL);
if (item->comment != NULL) fputs(item->comment, f);
/* protect item->name with quotes if needed */
if (strchr(item->name, ' ') != NULL) {
fprintf(f, "\"%s\"", item->name);
} else {
fprintf(f, "%s", item->name);
}
fprintf(f, " = %s\n", item->value);
}
}
if (this->comment) fputs(this->comment, f);
fclose(f);
return true;
}
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