纯C语言的配置文件读写工程
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c语言下通用的配置文件读写操作代码，可跨平台。 #include <ctype.h>#include <stdlib.h>#include <stdio.h>#include <string.h>#define SIZE_LINE1024//每行最大长度#define SIZE_FILENAME256//文件名最大长度#define min(x, y)(x <= y) ? x : ytypedef enum _ELineType_ { LINE_IDLE,//未处理行LINE_ERROR,//错误行LINE_EMPTY,//空白行或注释行LINE_SECTION,//节定义行LINE_VALUE//值定义行} ELineType ;static char gFilename[SIZE_FILENAME];static char *gBuffer;static int gBuflen;//去除串首尾空格，原串被改写static char *StrStrip(char *s){size_t size;char *p1, *p2;size = strlen(s);if (!size)return s;p2 = s + size - 1;while ((p2 >= s) && isspace(*p2))p2 --;*(p2 + 1) = '\0';p1 = s;while (*p1 && isspace(*p1))p1 ++;if (s != p1)memmove(s, p1, p2 - p1 + 2);return s;}//不区分大小写比较字符串static int StriCmp(const char *s1, const char *s2){int ch1, ch2;do{ch1 = (unsigned char)*(s1++);if ((ch1 >= 'A') && (ch1 <= 'Z'))ch1 += 0x20;ch2 = (unsigned char)*(s2++);if ((ch2 >= 'A') && (ch2 <= 'Z'))ch2 += 0x20;} while ( ch1 && (ch1 == ch2) );return(ch1 - ch2);}//取一行//输入：数据区(指针及长度)//输出：行类型、有效内容串(去首尾空格)、注释首、注释尾、下一行首(行尾与下一行首间为换行符)// 有效内容位置为[buf, rem1)static int GetLine(char *buf, int buflen, char *content, char **rem1, char **rem2, char **nextline){char *cont1, *cont2;int cntblank, cntCR, cntLF;//连续空格、换行符数量char isQuot1, isQuot2;//引号int i;char *p;//首先断行断注释，支持如下换行符：\r、\n、\r\n、\n\rcntblank = 0;cntCR = cntLF = 0;isQuot1 = isQuot2 = 0;cont1 = *rem1 = 0;content[0] = 0;for (i = 0, p = buf; i < buflen; i ++, p ++){if (*p == 0) {p ++;break;}//2个CR或LF，行结束if (cntCR == 2 || cntLF == 2) {p --;//回溯1break;}//CR或LF各1个之后任意字符，行结束if (cntCR + cntLF >= 2) {break;}//CR或LF之后出现其它字符，行结束if ((cntCR || cntLF) && *p != '\r' && *p != '\n')break;switch (*p) {case '\r':cntCR ++;break;case '\n':cntLF ++;break;case '\'':if (!isQuot2)isQuot1 = 1 - isQuot1;break;case '\"':if (!isQuot1)isQuot2 = 1 - isQuot2;break;case ';':case '#':if (isQuot1 || isQuot2)break;if (*rem1 == NULL)*rem1 = p - cntblank;break;default:if (isspace((unsigned char)*p)) {cntblank ++;} else {cntblank = 0;if ((*rem1 == NULL) && (cont1 == NULL))cont1 = p;}break;}}*nextline = p;*rem2 = p - cntCR - cntLF;if (*rem1 == NULL)*rem1 = *rem2;cont2 = *rem1 - cntblank;if (cont1 == NULL) {cont1 = cont2;return LINE_EMPTY;}i = (int)(cont2 - cont1);if (i >= SIZE_LINE)return LINE_ERROR;//内容头尾已无空格memcpy(content, cont1, i);content[i] = 0;if (content[0] == '[' && content[i - 1] == ']')return LINE_SECTION;if (strchr(content, '=') != NULL)return LINE_VALUE;return LINE_ERROR;}//取一节section//输入：节名称//输出：成功与否、节名称首、节名称尾、节内容首、节内容尾(含换行)、下一节首(节尾与下一节首间为空行或注释行)static int FindSection(const char *section, char **sect1, char **sect2, char **cont1, char **cont2, char **nextsect){int type;char content[SIZE_LINE];char *rem1, *rem2, *nextline;char *p;char *empty;int uselen = 0;char found = 0;if (gBuffer == NULL) {return 0;}while (gBuflen - uselen > 0) {p = gBuffer + uselen;type = GetLine(p, gBuflen - uselen, content, &rem1, &rem2, &nextline);uselen += (int)(nextline - p);if (LINE_SECTION == type) {if (found || section == NULL) break;//发现另一sectioncontent[strlen(content) - 1] = 0;//去尾部]StrStrip(content + 1);//去首尾空格if (StriCmp(content + 1, section) == 0) {found = 1;*sect1 = p;*sect2 = rem1;*cont1 = nextline;}empty = nextline;} elseif (LINE_VALUE == type) {if (!found && section == NULL) {found = 1;*sect1 = p;*sect2 = p;*cont1 = p;}empty = nextline;}}if (!found) return 0;*cont2 = empty;*nextsect = nextline;return 1;}//从一行取键、值//输入：内容串(将被改写)//输出：键串、值串static void GetKeyValue(char *content, char **key, char **value){char *p;p = strchr(content, '=');*p = 0;StrStrip(content);StrStrip(p + 1);*key = content;*value = p + 1;}//释放ini文件所占资源void iniFileFree(){if (gBuffer != NULL) {free(gBuffer);gBuffer = 0;gBuflen = 0;}}//加载ini文件至内存int iniFileLoad(const char *filename){FILE *file;int len;iniFileFree();if (strlen(filename) >= sizeof(gFilename))return 0;strcpy(gFilename, filename);file = fopen(gFilename, "rb");if (file == NULL) return 0;fseek(file, 0, SEEK_END);len = ftell(file);gBuffer = malloc(len);if (gBuffer == NULL) {fclose(file);return 0;}fseek(file, 0, SEEK_SET);len = fread(gBuffer, 1, len, file);fclose(file);gBuflen = len;return 1;}//读取值原始串static int iniGetValue(const char *section, const char *key, char *value, int maxlen, const char *defvalue){int type;char content[SIZE_LINE];char *rem1, *rem2, *nextline;char *key0, *value0;char *p;int uselen = 0;char found = 0;int len;if (gBuffer == NULL || key == NULL) {if (value != NULL)value[0] = 0;return 0;}while (gBuflen - uselen > 0) {p = gBuffer + uselen;type = GetLine(p, gBuflen - uselen, content, &rem1, &rem2, &nextline);uselen += (int)(nextline - p);if (LINE_SECTION == type) {if (found || section == NULL) break;//发现另一sectioncontent[strlen(content) - 1] = 0;//去尾部]StrStrip(content + 1);//去首尾空格if (StriCmp(content + 1, section) == 0) {found = 1;}} elseif (LINE_VALUE == type) {if (!found && section == NULL) {found = 1;}if (!found)continue;GetKeyValue(content, &key0, &value0);if (StriCmp(key0, key) == 0) {len = strlen(value0);if (len == 0) break;//空值视为无效if (value != NULL) {len = min(len, maxlen - 1);strncpy(value, value0, len);value[len] = 0;}return 1;}}}//未发现键值取缺省if (value != NULL) {if (defvalue != NULL) {len = min(strlen(defvalue), maxlen - 1);strncpy(value, defvalue, len);value[len] = 0;} else {value[0] = 0;}}return 0;}//获取字符串，不带引号int iniGetString(const char *section, const char *key, char *value, int maxlen, const char *defvalue){int ret;int len;ret = iniGetValue(section, key, value, maxlen, defvalue);if (!ret)return ret;//去首尾空格len = strlen(value);if (value[0] == '\'' && value[len - 1] == '\'') {value[len - 1] = 0;memmove(value, value + 1, len - 1);} elseif (value[0] == '\"' && value[len - 1] == '\"') {value[len - 1] = 0;memmove(value, value + 1, len - 1);}return ret;}//获取整数值int iniGetInt(const char *section, const char *key, int defvalue){char valstr[64];if (iniGetValue(section, key, valstr, sizeof(valstr), NULL)) return (int)strtol(valstr, NULL, 0);return defvalue;}//获取浮点数double iniGetDouble(const char *section, const char *key, double defvalue){char valstr[64];if (iniGetValue(section, key, valstr, sizeof(valstr), NULL)) return (int)atof(valstr);return defvalue;}//设置字符串：若value为NULL，则删除该key所在行，包括注释int iniSetString(const char *section, const char *key, const char *value){FILE *file;char *sect1, *sect2, *cont1, *cont2, *nextsect;char *p;int len, type;char content[SIZE_LINE];char *key0, *