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libfastcommon/src/ini_file_reader.c

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/**
* Copyright (C) 2008 Happy Fish / YuQing
*
* FastDFS may be copied only under the terms of the GNU General
* Public License V3, which may be found in the FastDFS source kit.
* Please visit the FastDFS Home Page http://www.csource.org/ for more detail.
**/
//ini_file_reader.c
#include <ctype.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include "shared_func.h"
#include "logger.h"
#include "http_func.h"
#include "ini_file_reader.h"
#define _LINE_BUFFER_SIZE 512
#define _INIT_ALLOC_ITEM_COUNT 32
static AnnotationMap *g_annotataionMap = NULL;
static int remallocSection(IniSection *pSection, IniItem **pItem);
static int iniDoLoadFromFile(const char *szFilename, \
IniContext *pContext);
static int iniDoLoadItemsFromBuffer(char *content, \
IniContext *pContext);
int iniSetAnnotationCallBack(AnnotationMap *map, int count)
{
int bytes;
AnnotationMap *p;
if (count <= 0)
{
logWarning("file: "__FILE__", line: %d, " \
"iniSetAnnotationCallBack fail count(%d) is incorrectly.", \
__LINE__, count);
return EINVAL;
}
bytes = sizeof(AnnotationMap) * (count + 1);
g_annotataionMap = (AnnotationMap *) malloc(bytes);
if (g_annotataionMap == NULL)
{
logError("file: "__FILE__", line: %d, " \
"malloc (%d) fail, errno: %d, error info: %s", \
__LINE__, bytes, errno, STRERROR(errno));
return ENOMEM;
}
memcpy(g_annotataionMap, map, sizeof(AnnotationMap) * count);
p = g_annotataionMap + count;
p->func_name = NULL;
p->func_init = NULL;
p->func_destroy = NULL;
p->func_get = NULL;
return 0;
}
void iniDestroyAnnotationCallBack()
{
AnnotationMap *pAnnoMap;
pAnnoMap = g_annotataionMap;
if (pAnnoMap == NULL)
{
return;
}
while (pAnnoMap->func_name)
{
if (pAnnoMap->func_destroy)
{
pAnnoMap->func_destroy();
}
pAnnoMap++;
}
g_annotataionMap = NULL;
}
static int iniCompareByItemName(const void *p1, const void *p2)
{
return strcmp(((IniItem *)p1)->name, ((IniItem *)p2)->name);
}
static int iniInitContext(IniContext *pContext)
{
int result;
memset(pContext, 0, sizeof(IniContext));
pContext->current_section = &pContext->global;
if ((result=hash_init(&pContext->sections, Time33Hash, 32, 0.75)) != 0)
{
logError("file: "__FILE__", line: %d, " \
"hash_init fail, errno: %d, error info: %s", \
__LINE__, result, STRERROR(result));
}
return result;
}
static int iniSortHashData(const int index, const HashData *data, void *args)
{
IniSection *pSection;
pSection = (IniSection *)data->value;
if (pSection->count > 1)
{
qsort(pSection->items, pSection->count, \
sizeof(IniItem), iniCompareByItemName);
}
return 0;
}
static void iniSortItems(IniContext *pContext)
{
if (pContext->global.count > 1)
{
qsort(pContext->global.items, pContext->global.count, \
sizeof(IniItem), iniCompareByItemName);
}
hash_walk(&pContext->sections, iniSortHashData, NULL);
}
int iniLoadFromFile(const char *szFilename, IniContext *pContext)
{
return iniLoadFromFileEx(szFilename, pContext, false);
}
int iniLoadFromFileEx(const char *szFilename, IniContext *pContext,
bool ignore_annotation)
{
int result;
int len;
char *pLast;
char full_filename[MAX_PATH_SIZE];
if ((result=iniInitContext(pContext)) != 0)
{
return result;
}
pContext->ignore_annotation = ignore_annotation;
if (strncasecmp(szFilename, "http://", 7) == 0)
{
*pContext->config_path = '\0';
snprintf(full_filename, sizeof(full_filename),"%s",szFilename);
}
else
{
if (*szFilename == '/')
{
pLast = strrchr(szFilename, '/');
len = pLast - szFilename;
if (len >= sizeof(pContext->config_path))
{
logError("file: "__FILE__", line: %d, "\
"the path of the config file: %s is " \
"too long!", __LINE__, szFilename);
return ENOSPC;
}
memcpy(pContext->config_path, szFilename, len);
*(pContext->config_path + len) = '\0';
snprintf(full_filename, sizeof(full_filename), \
"%s", szFilename);
}
else
{
memset(pContext->config_path, 0, \
sizeof(pContext->config_path));
if (getcwd(pContext->config_path, sizeof( \
pContext->config_path)) == NULL)
{
logError("file: "__FILE__", line: %d, " \
"getcwd fail, errno: %d, " \
"error info: %s", \
__LINE__, errno, STRERROR(errno));
return errno != 0 ? errno : EPERM;
}
len = strlen(pContext->config_path);
if (len > 0 && pContext->config_path[len - 1] == '/')
{
len--;
*(pContext->config_path + len) = '\0';
}
snprintf(full_filename, sizeof(full_filename), \
"%s/%s", pContext->config_path, szFilename);
pLast = strrchr(szFilename, '/');
if (pLast != NULL)
{
int tail_len;
tail_len = pLast - szFilename;
if (len + 1 + tail_len >= sizeof( \
pContext->config_path))
{
logError("file: "__FILE__", line: %d, "\
"the path of the config " \
"file: %s is too long!", \
__LINE__, szFilename);
return ENOSPC;
}
*(pContext->config_path + len++) = '/';
memcpy(pContext->config_path + len, \
szFilename, tail_len);
len += tail_len;
*(pContext->config_path + len) = '\0';
}
}
}
result = iniDoLoadFromFile(full_filename, pContext);
if (result == 0)
{
iniSortItems(pContext);
}
else
{
iniFreeContext(pContext);
}
return result;
}
static int iniDoLoadFromFile(const char *szFilename, \
IniContext *pContext)
{
char *content;
int result;
int http_status;
int content_len;
int64_t file_size;
char error_info[512];
if (strncasecmp(szFilename, "http://", 7) == 0)
{
if ((result=get_url_content(szFilename, 10, 60, &http_status, \
&content, &content_len, error_info)) != 0)
{
logError("file: "__FILE__", line: %d, " \
"get_url_content fail, " \
"url: %s, error info: %s", \
__LINE__, szFilename, error_info);
return result;
}
if (http_status != 200)
{
free(content);
logError("file: "__FILE__", line: %d, " \
"HTTP status code: %d != 200, url: %s", \
__LINE__, http_status, szFilename);
return EINVAL;
}
}
else
{
if ((result=getFileContent(szFilename, &content, \
&file_size)) != 0)
{
return result;
}
}
result = iniDoLoadItemsFromBuffer(content, pContext);
free(content);
return result;
}
int iniLoadFromBuffer(char *content, IniContext *pContext)
{
int result;
if ((result=iniInitContext(pContext)) != 0)
{
return result;
}
result = iniDoLoadItemsFromBuffer(content, pContext);
if (result == 0)
{
iniSortItems(pContext);
}
else
{
iniFreeContext(pContext);
}
return result;
}
static int iniDoLoadItemsFromBuffer(char *content, IniContext *pContext)
{
AnnotationMap *pAnnoMap;
IniSection *pSection;
IniItem *pItem;
char *pLine;
char *pLastEnd;
char *pEqualChar;
char *pItemName;
char *pAnnoItemLine;
char *pIncludeFilename;
char *pItemValues[100];
char pFuncName[FAST_INI_ITEM_NAME_LEN + 1];
char full_filename[MAX_PATH_SIZE];
int i;
int nLineLen;
int nNameLen;
int nItemCnt;
int nValueLen;
int result;
int isAnnotation;
result = 0;
pAnnoItemLine = NULL;
isAnnotation = 0;
*pFuncName = '\0';
pLastEnd = content - 1;
pSection = pContext->current_section;
pItem = pSection->items + pSection->count;
while (pLastEnd != NULL)
{
pLine = pLastEnd + 1;
pLastEnd = strchr(pLine, '\n');
if (pLastEnd != NULL)
{
*pLastEnd = '\0';
}
if (isAnnotation && pLine != pAnnoItemLine)
{
logWarning("file: "__FILE__", line: %d, " \
"the @function annotation line " \
"must follow by key=value line!", __LINE__);
isAnnotation = 0;
}
if (*pLine == '#' && \
strncasecmp(pLine+1, "include", 7) == 0 && \
(*(pLine+8) == ' ' || *(pLine+8) == '\t'))
{
pIncludeFilename = strdup(pLine + 9);
if (pIncludeFilename == NULL)
{
logError("file: "__FILE__", line: %d, " \
"strdup %d bytes fail", __LINE__, \
(int)strlen(pLine + 9) + 1);
result = errno != 0 ? errno : ENOMEM;
break;
}
trim(pIncludeFilename);
if (strncasecmp(pIncludeFilename, "http://", 7) == 0)
{
snprintf(full_filename, sizeof(full_filename),\
"%s", pIncludeFilename);
}
else
{
if (*pIncludeFilename == '/')
{
snprintf(full_filename, sizeof(full_filename), \
"%s", pIncludeFilename);
}
else
{
snprintf(full_filename, sizeof(full_filename), \
"%s/%s", pContext->config_path, \
pIncludeFilename);
}
if (!fileExists(full_filename))
{
logError("file: "__FILE__", line: %d, " \
"include file \"%s\" not exists, " \
"line: \"%s\"", __LINE__, \
pIncludeFilename, pLine);
free(pIncludeFilename);
result = ENOENT;
break;
}
}
pContext->current_section = &pContext->global;
result = iniDoLoadFromFile(full_filename, pContext);
if (result != 0)
{
free(pIncludeFilename);
break;
}
pContext->current_section = &pContext->global;
pSection = pContext->current_section;
pItem = pSection->items + pSection->count; //must re-asign
free(pIncludeFilename);
continue;
}
else if ((*pLine == '#' && \
strncasecmp(pLine+1, "@function", 9) == 0 && \
(*(pLine+10) == ' ' || *(pLine+10) == '\t')))
{
if (!pContext->ignore_annotation) {
nNameLen = strlen(pLine + 11);
if (nNameLen > FAST_INI_ITEM_NAME_LEN)
{
nNameLen = FAST_INI_ITEM_NAME_LEN;
}
memcpy(pFuncName, pLine + 11, nNameLen);
pFuncName[nNameLen] = '\0';
trim(pFuncName);
if ((int)strlen(pFuncName) > 0)
{
isAnnotation = 1;
pAnnoItemLine = pLastEnd + 1;
}
else
{
logWarning("file: "__FILE__", line: %d, " \
"the function name of annotation line is empty", \
__LINE__);
}
}
continue;
}
trim(pLine);
if (*pLine == '#' || *pLine == '\0')
{
continue;
}
nLineLen = strlen(pLine);
if (*pLine == '[' && *(pLine + (nLineLen - 1)) == ']') //section
{
char *section_name;
int section_len;
*(pLine + (nLineLen - 1)) = '\0';
section_name = pLine + 1; //skip [
trim(section_name);
if (*section_name == '\0') //global section
{
pContext->current_section = &pContext->global;
pSection = pContext->current_section;
pItem = pSection->items + pSection->count;
continue;
}
section_len = strlen(section_name);
pSection = (IniSection *)hash_find(&pContext->sections,\
section_name, section_len);
if (pSection == NULL)
{
pSection = (IniSection *)malloc(sizeof(IniSection));
if (pSection == NULL)
{
result = errno != 0 ? errno : ENOMEM;
logError("file: "__FILE__", line: %d, "\
"malloc %d bytes fail, " \
"errno: %d, error info: %s", \
__LINE__, \
(int)sizeof(IniSection), \
result, STRERROR(result));
break;
}
memset(pSection, 0, sizeof(IniSection));
result = hash_insert(&pContext->sections, \
section_name, section_len, pSection);
if (result < 0)
{
result *= -1;
logError("file: "__FILE__", line: %d, "\
"insert into hash table fail, "\
"errno: %d, error info: %s", \
__LINE__, result, \
STRERROR(result));
break;
}
else
{
result = 0;
}
}
pContext->current_section = pSection;
pItem = pSection->items + pSection->count;
continue;
}
pEqualChar = strchr(pLine, '=');
if (pEqualChar == NULL)
{
continue;
}
nNameLen = pEqualChar - pLine;
nValueLen = strlen(pLine) - (nNameLen + 1);
if (nNameLen > FAST_INI_ITEM_NAME_LEN)
{
nNameLen = FAST_INI_ITEM_NAME_LEN;
}
if (nValueLen > FAST_INI_ITEM_VALUE_LEN)
{
nValueLen = FAST_INI_ITEM_VALUE_LEN;
}
if (pSection->count >= pSection->alloc_count)
{
result = remallocSection(pSection, &pItem);
if (result)
{
break;
}
}
memcpy(pItem->name, pLine, nNameLen);
memcpy(pItem->value, pEqualChar + 1, nValueLen);
trim(pItem->name);
trim(pItem->value);
if (isAnnotation)
{
isAnnotation = 0;
if (g_annotataionMap == NULL)
{
logWarning("file: "__FILE__", line: %d, " \
"not set annotataionMap and (%s) will use " \
"the item value (%s)", __LINE__, pItem->name,
pItem->value);
pSection->count++;
pItem++;
continue;
}
nItemCnt = -1;
pAnnoMap = g_annotataionMap;
while (pAnnoMap->func_name)
{
if (strcmp(pFuncName, pAnnoMap->func_name) == 0)
{
if (pAnnoMap->func_init)
{
pAnnoMap->func_init();
}
if (pAnnoMap->func_get)
{
nItemCnt = pAnnoMap->func_get(pItem->value, pItemValues, 100);
}
break;
}
pAnnoMap++;
}
if (nItemCnt == -1)
{
logWarning("file: "__FILE__", line: %d, " \
"not found corresponding annotation function: %s, " \
"\"%s\" will use the item value \"%s\"", __LINE__,
pFuncName, pItem->name, pItem->value);
pSection->count++;
pItem++;
continue;
}
else if (nItemCnt == 0)
{
logWarning("file: "__FILE__", line: %d, " \
"annotation function %s execute fail, " \
"\"%s\" will use the item value \"%s\"", __LINE__,
pFuncName, pItem->name, pItem->value);
pSection->count++;
pItem++;
continue;
}
pItemName = pItem->name;
nNameLen = strlen(pItemName);
for (i = 0; i < nItemCnt; i++)
{
nValueLen = strlen(pItemValues[i]);
if (nValueLen > FAST_INI_ITEM_VALUE_LEN)
{
nValueLen = FAST_INI_ITEM_VALUE_LEN;
}
memcpy(pItem->name, pItemName, nNameLen);
memcpy(pItem->value, pItemValues[i], nValueLen);
pItem->value[nValueLen] = '\0';
pSection->count++;
pItem++;
if (pSection->count >= pSection->alloc_count)
{
result = remallocSection(pSection, &pItem);
if (result)
{
break;
}
}
}
continue;
}
pSection->count++;
pItem++;
}
if (result == 0 && isAnnotation)
{
logWarning("file: "__FILE__", line: %d, " \
"the @function annotation line " \
"must follow by key=value line!", __LINE__);
}
return result;
}
static int remallocSection(IniSection *pSection, IniItem **pItem)
{
int bytes, result;
IniItem *pNew;
if (pSection->alloc_count == 0)
{
pSection->alloc_count = _INIT_ALLOC_ITEM_COUNT;
}
else
{
pSection->alloc_count *= 2;
}
bytes = sizeof(IniItem) * pSection->alloc_count;
pNew = (IniItem *)malloc(bytes);
if (pNew == NULL)
{
logError("file: "__FILE__", line: %d, " \
"malloc %d bytes fail", __LINE__, bytes);
result = errno != 0 ? errno : ENOMEM;
return result;
}
if (pSection->count > 0)
{
memcpy(pNew, pSection->items,
sizeof(IniItem) * pSection->count);
free(pSection->items);
}
pSection->items = pNew;
*pItem = pSection->items + pSection->count;
memset(*pItem, 0, sizeof(IniItem) * \
(pSection->alloc_count - pSection->count));
return 0;
}
static int iniFreeHashData(const int index, const HashData *data, void *args)
{
IniSection *pSection;
pSection = (IniSection *)data->value;
if (pSection == NULL)
{
return 0;
}
if (pSection->items != NULL)
{
free(pSection->items);
memset(pSection, 0, sizeof(IniSection));
}
free(pSection);
((HashData *)data)->value = NULL;
return 0;
}
void iniFreeContext(IniContext *pContext)
{
if (pContext == NULL)
{
return;
}
if (pContext->global.items != NULL)
{
free(pContext->global.items);
memset(&pContext->global, 0, sizeof(IniSection));
}
hash_walk(&pContext->sections, iniFreeHashData, NULL);
hash_destroy(&pContext->sections);
}
#define INI_FIND_ITEM(szSectionName, szItemName, pContext, pSection, \
targetItem, pItem, return_val) \
if (szSectionName == NULL || *szSectionName == '\0') \
{ \
pSection = &pContext->global; \
} \
else \
{ \
pSection = (IniSection *)hash_find(&pContext->sections, \
szSectionName, strlen(szSectionName)); \
if (pSection == NULL) \
{ \
return return_val; \
} \
} \
\
if (pSection->count <= 0) \
{ \
return return_val; \
} \
\
snprintf(targetItem.name, sizeof(targetItem.name), "%s", szItemName); \
pItem = (IniItem *)bsearch(&targetItem, pSection->items, \
pSection->count, sizeof(IniItem), iniCompareByItemName);
char *iniGetStrValue(const char *szSectionName, const char *szItemName, \
IniContext *pContext)
{
IniItem targetItem;
IniSection *pSection;
IniItem *pItem;
INI_FIND_ITEM(szSectionName, szItemName, pContext, pSection, \
targetItem, pItem, NULL)
if (pItem == NULL)
{
return NULL;
}
else
{
return pItem->value;
}
}
int64_t iniGetInt64Value(const char *szSectionName, const char *szItemName, \
IniContext *pContext, const int64_t nDefaultValue)
{
char *pValue;
pValue = iniGetStrValue(szSectionName, szItemName, pContext);
if (pValue == NULL)
{
return nDefaultValue;
}
else
{
return strtoll(pValue, NULL, 10);
}
}
int iniGetIntValue(const char *szSectionName, const char *szItemName, \
IniContext *pContext, const int nDefaultValue)
{
char *pValue;
pValue = iniGetStrValue(szSectionName, szItemName, pContext);
if (pValue == NULL)
{
return nDefaultValue;
}
else
{
return atoi(pValue);
}
}
double iniGetDoubleValue(const char *szSectionName, const char *szItemName, \
IniContext *pContext, const double dbDefaultValue)
{
char *pValue;
pValue = iniGetStrValue(szSectionName, szItemName, pContext);
if (pValue == NULL)
{
return dbDefaultValue;
}
else
{
return strtod(pValue, NULL);
}
}
bool iniGetBoolValue(const char *szSectionName, const char *szItemName, \
IniContext *pContext, const bool bDefaultValue)
{
char *pValue;
pValue = iniGetStrValue(szSectionName, szItemName, pContext);
if (pValue == NULL)
{
return bDefaultValue;
}
else
{
return strcasecmp(pValue, "true") == 0 ||
strcasecmp(pValue, "yes") == 0 ||
strcasecmp(pValue, "on") == 0 ||
strcmp(pValue, "1") == 0;
}
}
int iniGetValues(const char *szSectionName, const char *szItemName, \
IniContext *pContext, char **szValues, const int max_values)
{
IniItem *pItem;
IniItem *pItemEnd;
char **ppValues;
int count;
if (max_values <= 0)
{
return 0;
}
pItem = iniGetValuesEx(szSectionName, szItemName,
pContext, &count);
if (count == 0)
{
return 0;
}
if (count > max_values)
{
count = max_values;
}
ppValues = szValues;
pItemEnd = pItem + count;
for (; pItem<pItemEnd; pItem++)
{
*ppValues++ = pItem->value;
}
return count;
}
IniItem *iniGetValuesEx(const char *szSectionName, const char *szItemName, \
IniContext *pContext, int *nTargetCount)
{
IniItem targetItem;
IniSection *pSection;
IniItem *pFound;
IniItem *pItem;
IniItem *pItemEnd;
IniItem *pItemStart;
*nTargetCount = 0;
INI_FIND_ITEM(szSectionName, szItemName, pContext, pSection, \
targetItem, pFound, NULL)
if (pFound == NULL)
{
return NULL;
}
*nTargetCount = 1;
for (pItem=pFound-1; pItem>=pSection->items; pItem--)
{
if (strcmp(pItem->name, szItemName) != 0)
{
break;
}
(*nTargetCount)++;
}
pItemStart = pFound - (*nTargetCount) + 1;
pItemEnd = pSection->items + pSection->count;
for (pItem=pFound+1; pItem<pItemEnd; pItem++)
{
if (strcmp(pItem->name, szItemName) != 0)
{
break;
}
(*nTargetCount)++;
}
return pItemStart;
}
static int iniPrintHashData(const int index, const HashData *data, void *args)
{
IniSection *pSection;
IniItem *pItem;
IniItem *pItemEnd;
char section_name[256];
int section_len;
int i;
pSection = (IniSection *)data->value;
if (pSection == NULL)
{
return 0;
}
section_len = data->key_len;
if (section_len >= sizeof(section_name))
{
section_len = sizeof(section_name) - 1;
}
memcpy(section_name, data->key, section_len);
*(section_name + section_len) = '\0';
printf("section: %s, item count: %d\n", section_name, pSection->count);
if (pSection->count > 0)
{
i = 0;
pItemEnd = pSection->items + pSection->count;
for (pItem=pSection->items; pItem<pItemEnd; pItem++)
{
printf("%d. %s=%s\n", ++i, pItem->name, pItem->value);
}
}
printf("\n");
return 0;
}
void iniPrintItems(IniContext *pContext)
{
IniItem *pItem;
IniItem *pItemEnd;
int i;
printf("global section, item count: %d\n", pContext->global.count);
if (pContext->global.count > 0)
{
i = 0;
pItemEnd = pContext->global.items + pContext->global.count;
for (pItem=pContext->global.items; pItem<pItemEnd; pItem++)
{
printf("%d. %s=%s\n", ++i, pItem->name, pItem->value);
}
}
printf("\n");
hash_walk(&pContext->sections, iniPrintHashData, NULL);
}
struct section_walk_arg {
IniSectionInfo *sections;
int count;
int size;
};
static int iniSectionWalkCallback(const int index, const HashData *data,
void *args)
{
struct section_walk_arg *walk_arg;
IniSection *pSection;
char *section_name;
int section_len;
pSection = (IniSection *)data->value;
if (pSection == NULL)
{
return 0;
}
walk_arg = (struct section_walk_arg *)args;
if (walk_arg->count >= walk_arg->size)
{
return ENOSPC;
}
section_len = data->key_len;
if (section_len > FAST_INI_ITEM_NAME_LEN)
{
section_len = FAST_INI_ITEM_NAME_LEN;
}
section_name = walk_arg->sections[walk_arg->count].section_name;
memcpy(section_name, data->key, section_len);
*(section_name + section_len) = '\0';
walk_arg->sections[walk_arg->count].pSection = pSection;
walk_arg->count++;
return 0;
}
int iniGetSectionNames(IniContext *pContext, IniSectionInfo *sections,
const int max_size, int *nCount)
{
struct section_walk_arg walk_arg;
int result;
walk_arg.sections = sections;
walk_arg.count = 0;
walk_arg.size = max_size;
result = hash_walk(&pContext->sections, iniSectionWalkCallback, &walk_arg);
*nCount = walk_arg.count;
return result;
}
IniItem *iniGetSectionItems(const char *szSectionName, IniContext *pContext,
int *nCount)
{
IniSection *pSection;
if (szSectionName == NULL || *szSectionName == '\0')
{
pSection = &pContext->global;
}
else
{
pSection = (IniSection *)hash_find(&pContext->sections,
szSectionName, strlen(szSectionName));
if (pSection == NULL)
{
*nCount = 0;
return NULL;
}
}
*nCount = pSection->count;
return pSection->items;
}
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