.ini 文件格式如下：

[section1]

key1=value

…

keyn=value

[section2]

key1=value

…

keyn=value

代碼如下：

#define _PARAM_GLOBALS_ #include <stdio.h> #include <stdlib.h> #include <string.h> #include "userlib.h" #include "paramConfig.h"#define SECTION_MAX_LEN 256#define STRVALUE_MAX_LEN 256#define LINE_CONTENT_MAX_LEN 256 //read value from .ini void IniReadValue(char* section, char* key, char* val, const char* file) {FILE* fp;int i = 0;int lineContentLen = 0;int position = 0;char lineContent[LINE_CONTENT_MAX_LEN];bool bFoundSection = false;bool bFoundKey = false;fp = fopen(file, "r");if(fp == NULL){printf("%s: Opent file %s failed.\n", __FILE__, file);return;}while(feof(fp) == 0){memset(lineContent, 0, LINE_CONTENT_MAX_LEN);fgets(lineContent, LINE_CONTENT_MAX_LEN, fp);if((lineContent[0] == ';') || (lineContent[0] == '\0') || (lineContent[0] == '\r') || (lineContent[0] == '\n')){continue;}//check sectionif(strncmp(lineContent, section, strlen(section)) == 0){bFoundSection = true;//printf("Found section = %s\n", lineContent);while(feof(fp) == 0){memset(lineContent, 0, LINE_CONTENT_MAX_LEN);fgets(lineContent, LINE_CONTENT_MAX_LEN, fp);//check keyif(strncmp(lineContent, key, strlen(key)) == 0){bFoundKey = true;lineContentLen = strlen(lineContent);//find valuefor(i = strlen(key); i < lineContentLen; i++){if(lineContent[i] == '='){position = i + 1;break;}}if(i >= lineContentLen) break;strncpy(val, lineContent + position, strlen(lineContent + position));lineContentLen = strlen(val);for(i = 0; i < lineContentLen; i++){if((lineContent[i] == '\0') || (lineContent[i] == '\r') || (lineContent[i] == '\n')){val[i] = '\0';break;}} }else if(lineContent[0] == '[') {break;}}break;}}if(!bFoundSection){printf("No section = %s\n", section);}else if(!bFoundKey){printf("No key = %s\n", key);}fclose(fp); }int readStringValue(const char* section, char* key, char* val, const char* file) {char sect[SECTION_MAX_LEN];//printf("section = %s, key = %s, file = %s\n", section, key, file);if (section == NULL || key == NULL || val == NULL || file == NULL){printf("%s: input parameter(s) is NULL!\n", __func__);return READ_STR_ERR;}memset(sect, 0, SECTION_MAX_LEN);sprintf(sect, "[%s]", section);//printf("reading value...\n");IniReadValue(sect, key, val, file);return READ_STR_OK; }int readIntValue(const char* section, char* key, const char* file) {char strValue[STRVALUE_MAX_LEN];memset(strValue, '\0', STRVALUE_MAX_LEN);if(readStringValue(section, key, strValue, file) != READ_STR_OK){printf("%s: error", __func__);return 0;}return(atoi(strValue)); }void IniWriteValue(const char* section, char* key, char* val, const char* file) {FILE* fp;int i = 0, n = 0, err = 0;int lineContentLen = 0;int position = 0;char lineContent[LINE_CONTENT_MAX_LEN];char strWrite[LINE_CONTENT_MAX_LEN];bool bFoundSection = false;bool bFoundKey = false;memset(lineContent, '\0', LINE_CONTENT_MAX_LEN);memset(strWrite, '\0', LINE_CONTENT_MAX_LEN);n = sprintf(strWrite, "%s=%s\n", key, val);fp = fopen(file, "r+");if(fp == NULL){printf("%s: Opent file %s failed.\n", __FILE__, file);return;}while(feof(fp) == 0){memset(lineContent, 0, LINE_CONTENT_MAX_LEN);fgets(lineContent, LINE_CONTENT_MAX_LEN, fp);if((lineContent[0] == ';') || (lineContent[0] == '\0') || (lineContent[0] == '\r') || (lineContent[0] == '\n')){continue;}//check sectionif(strncmp(lineContent, section, strlen(section)) == 0){bFoundSection = true;while(feof(fp) == 0){memset(lineContent, 0, LINE_CONTENT_MAX_LEN);fgets(lineContent, LINE_CONTENT_MAX_LEN, fp);//check keyif(strncmp(lineContent, key, strlen(key)) == 0){bFoundKey = true;printf("%s: %s=%s\n", __func__, key, val);fseek(fp, (0-strlen(lineContent)),SEEK_CUR);err = fputs(strWrite, fp);if(err < 0){printf("%s err.\n", __func__);}break; }else if(lineContent[0] == '[') {break;}}break;}}if(!bFoundSection){printf("No section = %s\n", section);}else if(!bFoundKey){printf("No key = %s\n", key);}fclose(fp); }int writeStringVlaue(const char* section, char* key, char* val, const char* file) {char sect[SECTION_MAX_LEN];//printf("section = %s, key = %s, file = %s\n", section, key, file);if (section == NULL || key == NULL || val == NULL || file == NULL){printf("%s: input parameter(s) is NULL!\n", __func__);return READ_STR_ERR;}memset(sect, '\0', SECTION_MAX_LEN);sprintf(sect, "[%s]", section);IniWriteValue(sect, key, val, file); }int writeIntValue(const char* section, char* key, int val, const char* file) {char strValue[STRVALUE_MAX_LEN];memset(strValue, '\0', STRVALUE_MAX_LEN);sprintf(strValue, "%-4d", val);writeStringVlaue(section, key, strValue, file);}

在 writeIntValue() 函數中 sprintf(strValue, “%-4d”, val); 做了對齊及位寬處理，主要是因為避免不同的位數數據寫入出現錯誤。目前還沒想到比較好的解決方案，暫時就這樣處理了。

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