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566 lines (521 loc) · 11.9 KB
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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2003-2016. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include "init_file.h"
#define ALLOC malloc
#define REALLOC realloc
#define FREE free
#define CONTEXT_BUFFER_SIZE 1024
typedef struct {
HANDLE fd;
int eof;
int num;
int pos;
char buff[CONTEXT_BUFFER_SIZE];
} FileContext;
static char *read_one_line(FileContext *fc)
{
char *buff = ALLOC(10);
int size = 10;
int num = 0;
int skipping;
int escaped;
#define PUSH(Char) \
do { \
if (num == size) { \
size += 10; \
buff = REALLOC(buff,size); \
} \
buff[num++] = (Char); \
} while(0)
#define POP() (buff[--num])
#define TOP() (buff[(num-1)])
skipping = 0;
escaped = 0;
for(;;) {
char current;
if (fc->eof) {
break;
}
if (fc->pos == fc->num) {
if (!ReadFile(fc->fd, fc->buff, CONTEXT_BUFFER_SIZE,
&(fc->num), NULL) || !(fc->num)) {
fc->eof = 1;
break;
}
fc->pos = 0;
}
current = fc->buff[fc->pos];
++(fc->pos);
switch (current) {
case ' ':
if (!skipping && num) {
PUSH(current);
}
escaped = 0;
break;
case ';':
if (!skipping) {
if (!escaped) {
skipping = 1;
} else {
PUSH(current);
}
}
escaped = 0;
break;
case '\\':
if (!skipping) {
if (!escaped) {
escaped = 1;
} else {
PUSH(current);
escaped = 0;
}
}
break;
case '\r':
break;
case '\n':
if (!escaped) {
while (num && TOP() == ' ') {
POP();
}
if (num) {
goto done;
}
}
skipping = 0;
escaped = 0;
break;
default:
if (!skipping) {
PUSH(current);
}
escaped = 0;
break;
}
}
/* EOF comes here */
while (num && TOP() == ' ') {
POP();
}
if (!num) {
FREE(buff);
return NULL;
}
done:
PUSH('\0');
return buff;
#undef PUSH
#undef POP
#undef TOP
}
static int is_section_header(char *line)
{
int x = strlen(line);
return (x > 2 && *line == '[' && line[x-1] == ']');
}
static int is_key_value(char *line)
{
char *p = strchr(line,'=');
return (p != NULL && p > line);
}
static char *digout_section_name(char *line)
/* Moving it because it shall later be freed. */
{
int x = strlen(line);
memmove(line,line+1,x-1);
line[x-2] = '\0';
return line;
}
static void digout_key_value(char *line, char **key, char **value)
{
char *e = strchr(line,'=');
*key = line;
*value = (e+1);
*e = '\0';
while (*(--e) == ' ') {
*e = '\0';
}
while (**value == ' ') {
++(*value);
}
}
InitFile *load_init_file(wchar_t *filename)
{
HANDLE infile;
InitFile *inif;
InitSection *inis;
InitEntry *inie;
FileContext fc;
char *line;
char **lines;
int size_lines;
int num_lines;
int i;
if ( (infile = CreateFileW(filename,
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL)) == INVALID_HANDLE_VALUE) {
return NULL;
}
size_lines = 10;
num_lines = 0;
lines = ALLOC(size_lines * sizeof(char *));
fc.fd = infile;
fc.eof = 0;
fc.num = 0;
fc.pos = 0;
while ((line = read_one_line(&fc)) != NULL) {
if (num_lines == size_lines) {
size_lines += 10;
lines = REALLOC(lines,size_lines * sizeof(char *));
}
lines[num_lines] = line;
++num_lines;
}
CloseHandle(infile);
/* Now check the lines before doing anything else, so that
we don't need any error handling while creating the data
structures */
/*
The file should contain:
[section]
Key=Value
...
[section]
...
*/
i = 0;
while (i < num_lines && is_section_header(lines[i])) {
++i;
while (i < num_lines && is_key_value(lines[i])) {
++i;
}
}
if (i < num_lines) {
for (i = 0; i < num_lines; ++i) {
FREE(lines[i]);
}
FREE(lines);
return NULL;
}
/* So, now we know it's consistent... */
i = 0;
inif = ALLOC(sizeof(InitFile));
inif->num_sections = 0;
inif->size_sections = 10;
inif->sections = ALLOC(sizeof(InitSection *) * 10);
while (i < num_lines) {
inis = ALLOC(sizeof(InitSection));
inis->num_entries = 0;
inis->size_entries = 10;
inis->section_name = digout_section_name(lines[i]);
inis->entries = ALLOC(sizeof(InitEntry *) * 10);
++i;
while (i < num_lines && is_key_value(lines[i])) {
inie = ALLOC(sizeof(InitEntry));
digout_key_value(lines[i], &(inie->key), &(inie->value));
if (inis->num_entries == inis->size_entries) {
inis->size_entries += 10;
inis->entries =
REALLOC(inis->entries,
sizeof(InitEntry *) * inis->size_entries);
}
inis->entries[inis->num_entries] = inie;
++(inis->num_entries);
++i;
}
if (inif->num_sections == inif->size_sections) {
inif->size_sections += 10;
inif->sections =
REALLOC(inif->sections,
sizeof(InitSection *) * inif->size_sections);
}
inif->sections[inif->num_sections] = inis;
++(inif->num_sections);
}
FREE(lines); /* Only the array of strings, not the actual strings, they
are kept in the data structures. */
return inif;
}
int store_init_file(InitFile *inif, wchar_t *filename)
{
char *buff;
int size = 10;
int num = 0;
int i,j;
HANDLE outfile;
#define PUSH(Char) \
do { \
if (num == size) { \
size += 10; \
buff = REALLOC(buff,size); \
} \
buff[num++] = (Char); \
} while(0)
if ( (outfile = CreateFileW(filename,
GENERIC_WRITE,
FILE_SHARE_WRITE,
NULL,
CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL)) == INVALID_HANDLE_VALUE) {
return INIT_FILE_OPEN_ERROR;
}
buff = ALLOC(size);
for(i = 0; i < inif->num_sections; ++i) {
int len;
int written;
InitSection *inis = inif->sections[i];
if (!WriteFile(outfile,"[",1,&written,NULL) || written != 1) {
goto write_error;
}
len = strlen(inis->section_name);
if (!WriteFile(outfile,inis->section_name,len,&written,NULL) ||
written != len) {
goto write_error;
}
if (!WriteFile(outfile,"]\n",2,&written,NULL) || written != 2) {
goto write_error;
}
for (j = 0; j < inis->num_entries; ++j) {
InitEntry *inie = inis->entries[j];
char *p = inie->key;
num = 0;
for (;*p != '\0';++p) {
switch (*p) {
case '\\':
case ';':
PUSH('\\');
default:
PUSH(*p);
break;
}
}
PUSH('=');
p = inie->value;
for (;*p != '\0';++p) {
switch (*p) {
case '\\':
case ';':
PUSH('\\');
default:
PUSH(*p);
break;
}
}
PUSH('\n');
if (!WriteFile(outfile,buff,num,&written,NULL) || written != num) {
goto write_error;
}
}
}
FREE(buff);
CloseHandle(outfile);
return INIT_FILE_NO_ERROR;
write_error:
FREE(buff);
CloseHandle(outfile);
return INIT_FILE_WRITE_ERROR;
#undef PUSH
}
InitFile *create_init_file(void)
{
InitFile *inif = ALLOC(sizeof(InitFile));
inif->num_sections = 0;
inif->size_sections = 10;
inif->sections = ALLOC(sizeof(InitSection *) * 10);
return inif;
}
InitSection *create_init_section(char *section_name)
{
InitSection *inis = ALLOC(sizeof(InitSection));
inis->num_entries = 0;
inis->section_name = ALLOC(sizeof(char) * (strlen(section_name) + 1));
strcpy(inis->section_name, section_name);
inis->size_entries = 10;
inis->entries = ALLOC(sizeof(InitEntry *) * 10);
return inis;
}
static void free_init_entry(InitEntry *inie)
{
FREE(inie->key);
/* Value is part of the same buffer */
FREE(inie);
}
void free_init_section(InitSection *inis)
{
int i;
for (i = 0;i < inis->num_entries; ++i) {
free_init_entry(inis->entries[i]);
}
FREE(inis->entries);
FREE(inis->section_name);
FREE(inis);
}
void free_init_file(InitFile *inif)
{
int i;
for (i = 0; i < inif->num_sections; ++i) {
free_init_section(inif->sections[i]);
}
FREE(inif->sections);
FREE(inif);
}
static int find_init_section(InitFile *inif, char *section_name)
{
int i;
for (i = 0; i < inif->num_sections; ++i) {
if (!strcmp(inif->sections[i]->section_name, section_name)) {
return i;
}
}
return -1;
}
int delete_init_section(InitFile *inif, char *section_name)
{
int i;
if ((i = find_init_section(inif, section_name)) < 0) {
return INIT_FILE_NOT_PRESENT;
}
free_init_section(inif->sections[i]);
--(inif->num_sections);
inif->sections[i] = inif->sections[inif->num_sections];
return INIT_FILE_PRESENT;
}
int add_init_section(InitFile *inif, InitSection *inis)
{
int i;
InitSection *oinis;
if ((i = find_init_section(inif, inis->section_name)) >= 0) {
oinis = inif->sections[i];
inif->sections[i] = inis;
free_init_section(oinis);
return INIT_FILE_PRESENT;
}
if (inif->num_sections == inif->size_sections) {
inif->size_sections += 10;
inif->sections = REALLOC(inif->sections,
sizeof(InitSection *) * inif->size_sections);
}
inif->sections[inif->num_sections] = inis;
++(inif->num_sections);
return INIT_FILE_NOT_PRESENT;
}
InitSection *lookup_init_section(InitFile *inif, char *section_name)
{
int i;
if ((i = find_init_section(inif,section_name)) < 0) {
return NULL;
}
return inif->sections[i];
}
char *nth_init_section_name(InitFile *inif, int n)
{
if (n >= inif->num_sections) {
return NULL;
}
return inif->sections[n]->section_name;
}
/* Inefficient... */
InitSection *copy_init_section(InitSection *inis, char *new_name)
{
int i;
char *key;
InitSection *ninis = create_init_section(new_name);
i = 0;
while ((key = nth_init_entry_key(inis,i)) != NULL) {
add_init_entry(ninis, key, lookup_init_entry(inis, key));
++i;
}
return ninis;
}
static int find_init_entry(InitSection *inis, char *key)
{
int i;
for (i = 0; i < inis->num_entries; ++i) {
if (!strcmp(inis->entries[i]->key,key)) {
return i;
}
}
return -1;
}
int add_init_entry(InitSection *inis, char *key, char *value)
{
int keylen = strlen(key);
char *buff = ALLOC(sizeof(char) * (keylen + strlen(value) + 2));
InitEntry *inie;
char *obuff;
int i;
strcpy(buff,key);
strcpy(buff+keylen+1,value);
if ((i = find_init_entry(inis,key)) >= 0) {
inie = inis->entries[i];
FREE(inie->key);
inie->key = buff;
inie->value = buff+keylen+1;
return INIT_FILE_PRESENT;
}
inie = ALLOC(sizeof(InitEntry));
inie->key = buff;
inie->value = buff+keylen+1;
if (inis->num_entries == inis->size_entries) {
inis->size_entries += 10;
inis->entries = REALLOC(inis->entries,
sizeof(InitEntry *) * inis->size_entries);
}
inis->entries[inis->num_entries] = inie;
++(inis->num_entries);
return INIT_FILE_NOT_PRESENT;
}
char *lookup_init_entry(InitSection *inis, char *key)
{
int i;
if ((i = find_init_entry(inis,key)) < 0) {
return NULL;
}
return inis->entries[i]->value;
}
char *nth_init_entry_key(InitSection *inis, int n)
{
if (n >= inis->num_entries) {
return NULL;
}
return inis->entries[n]->key;
}
int delete_init_entry(InitSection *inis, char *key)
{
int i;
InitEntry *inie;
if ((i = find_init_entry(inis, key)) < 0) {
return INIT_FILE_NOT_PRESENT;
}
free_init_entry(inis->entries[i]);
--(inis->num_entries);
inis->entries[i] = inis->entries[inis->num_entries];
return INIT_FILE_PRESENT;
}