c语言 实现按行读取文件。把内容按照第三种内存模型打包数据传出，把行数通过函数参数传出

/*
2 编写一个业务函数，实现按行读取文件。把内容按照第三种内存模型打包数据传出，把行数通过函数参数传出。
函数原型有两个，任意选择其一
要求1：请自己任意选择一个接口（函数），并实现功能；70分
要求2：编写测试用例。30分
要求3：自己编写内存释放函数
*/

#include "stdlib.h"#include "stdio.h"#include "string.h"#define  LineMaxLen 1024*2//需要求出多少行，按照行分配内存 //在按行读文件，第二次分配内存，把结果copy到第二次分配的内存中char **readFile1(const char *pfilename/*in*/, int *lineNum/*in out*/){intrv = 0, tmplineNum = 0;FILE*fp = NULL;charlineBuf[LineMaxLen];char*pTmp = NULL;char**tmpFile = NULL;if (pfilename==NULL || lineNum==NULL ) {rv = -1;printf("readFile1() err. param err \n");goto End;}fp = fopen(pfilename, "r");if (fp == NULL){rv = -2;printf("fopen() err. \n");goto End;}//第一遍读出多少行while (!feof(fp)){//读每一行memset(lineBuf, 0, sizeof(lineBuf));pTmp = fgets(lineBuf, LineMaxLen, fp);if (pTmp == NULL) {continue;}else{tmplineNum ++;}}tmpFile = (char **)malloc((tmplineNum +1)*sizeof(char *) );if (tmpFile == NULL){goto End;}//第二遍读内容//准备环境tmplineNum  = 0;fseek(fp, 0L, SEEK_SET);while (!feof(fp)){//读每一行memset(lineBuf, 0, sizeof(lineBuf));pTmp = fgets(lineBuf, LineMaxLen, fp);if (pTmp == NULL) {continue;}else{int tmplen = strlen(lineBuf);tmpFile[tmplineNum] = (char *)malloc( (tmplen+1)*sizeof(char));if (tmpFile[tmplineNum] == NULL){goto End;}strcpy(tmpFile[tmplineNum], lineBuf );printf("%s", lineBuf);tmplineNum ++;}}End:if (fp != NULL){fclose(fp); }*lineNum = tmplineNum;return tmpFile;}int readFile2(const char *pfilename/*in*/, char ***p/*out*/, int *lineNum/*int out*/){intrv = 0, tmplineNum = 0;FILE*fp = NULL;charlineBuf[LineMaxLen];char*pTmp = NULL;char**tmpFile = NULL;if (pfilename==NULL || lineNum==NULL ) {rv = -1;printf("readFile1() err. param err \n");goto End;}fp = fopen(pfilename, "r");if (fp == NULL){rv = -2;printf("fopen() err. \n");goto End;}//第一遍读出多少行while (!feof(fp)){//读每一行memset(lineBuf, 0, sizeof(lineBuf));pTmp = fgets(lineBuf, LineMaxLen, fp);if (pTmp == NULL) {continue;}else{tmplineNum ++;}}tmpFile = (char **)malloc((tmplineNum +1)*sizeof(char *) );if (tmpFile == NULL){goto End;}//第二遍读内容//准备环境tmplineNum  = 0;fseek(fp, 0L, SEEK_SET);while (!feof(fp)){//读每一行memset(lineBuf, 0, sizeof(lineBuf));pTmp = fgets(lineBuf, LineMaxLen, fp);if (pTmp == NULL) {continue;}else{int tmplen = strlen(lineBuf);tmpFile[tmplineNum] = (char *)malloc( (tmplen+1)*sizeof(char));if (tmpFile[tmplineNum] == NULL){goto End;}strcpy(tmpFile[tmplineNum], lineBuf );printf("%s", lineBuf);tmplineNum ++;}}End:if (fp != NULL){fclose(fp); }*lineNum = tmplineNum;*p = tmpFile;return 0;}void readFile2_Free(char **p, int lineNUm){int i = 0;if (p==NULL){return ;}for (i=0; i<lineNUm; i++){free(p[i]);}free(p);}void main21(){char **p = NULL;const char *pfilename = "c:/1.txt";int lineNum = 0, i = 0;p = readFile1(pfilename/*in*/,  &lineNum/*in out*/);if (p == NULL){return ;}for (i=0; i<lineNum; i++){printf("%s", p[i]);}readFile2_Free(p, lineNum);system("pause");}void main(){int ret = 0;char **p = NULL;const char *pfilename = "c:/1.txt";int lineNum = 0, i = 0;ret = readFile2(pfilename/*in*/, &p,  &lineNum/*in out*/);if (ret != 0){return ;}for (i=0; i<lineNum; i++){printf("%s", p[i]);}readFile2_Free(p, lineNum);system("pause");}