英文:
Need help cleaning memory leaks and resolving segmentation fault in C code using malloc and free
问题
我一直在使用C语言编写这段代码，但是它有很多内存泄漏问题，我不知道如何清理。当我在主函数中调用get_next_line时，我希望它能返回.txt文件的下一行内容。有人可以帮助我吗？我已经做了几次更改，但始终出现内存泄漏和分段错误。我期望的只是读取文件。
英文:
I've been working on this code in C and it has lots of leaks that I don´t know how to clean.
What I want when I call get_next_line on main is for it to return the next line of a .txt file.
Can somebody help me pls?
size_t ft_strlen(char *s){size_t i;if (!s)return (0);i = 0;while (s[i] != 'size_t ft_strlen(char *s){size_t i;if (!s)return (0);i = 0;while (s[i] != '\0')i++;return (i);}char *ft_strchr(char *s, int c){size_t i;i = 0;if (!s)return (0);while ((s[i] != '\0') && (s[i] != (unsigned char)c))i++;if ((s[i] == (unsigned char)c) || (c == '\0'))return ((char *)&s[i]);return (0);}char *ft_substr(char *s, unsigned int start, size_t len){size_t i;size_t j;char *sub;i = 0;j = 0;if (start >= ft_strlen(s) || !s || !len){sub = malloc(1 * sizeof(char));sub[0] = '\0';return (sub);}while (s[start + j] != '\0' && j < len)j++;if (s[start + j] != '\0')j++;sub = malloc((j + 1) * sizeof(char));if (!sub){free(s);return (0);}while (s[start] != '\0' && j > i)sub[i++] = s[start++];sub[i] = '\0';//free(s);return (sub);}char *ft_strjoin(char *s1, char *s2){char *cat;size_t i;size_t j;i = 0;j = 0;if (!s1){s1 = malloc(sizeof(char) * 1);s1[0] = '\0';}cat = (char *)malloc((ft_strlen(s1) + ft_strlen(s2) + 1) * sizeof(char));if (!cat)return (NULL);while (s1[i] != '\0'){cat[i] = s1[i];i++;}while (s2[j] != '\0')cat[i++] = s2[j++];free(s1);cat[i] = '\0';return (cat);}char *ft_content(int fd, char *content){char *buf;int buf_nb;buf_nb = 1;buf = (char *)malloc((BUFFER_SIZE + 1) * sizeof(char));if (!buf)return (0);while ((!ft_strchr(content, '\n')) && buf_nb != 0){buf_nb = read(fd, buf, BUFFER_SIZE);if (buf_nb == -1){free(buf);free(content);return (NULL);}buf[buf_nb] = '\0';content = ft_strjoin(content, buf);}free(buf);return (content);}char *get_next_line(int fd){static char *content;char *sub;int i;int len;i = 0;if (fd < 0 || BUFFER_SIZE <= 0)return (NULL);content = ft_content(fd, content);if (content == NULL)return (NULL);if (content[0] == '\0')return (NULL);while (content[i] != '\n' && content[i] != '\0')i++;sub = ft_substr(content, 0, i);len = ft_strlen(content);i++;content = ft_substr(content, i, len);return (sub);}int main(void){int a = open("exemplo.txt", O_RDONLY);printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));return (0);}')i++;return (i);}char *ft_strchr(char *s, int c){size_t i;i = 0;if (!s)return (0);while ((s[i] != 'size_t ft_strlen(char *s){size_t i;if (!s)return (0);i = 0;while (s[i] != '\0')i++;return (i);}char *ft_strchr(char *s, int c){size_t i;i = 0;if (!s)return (0);while ((s[i] != '\0') && (s[i] != (unsigned char)c))i++;if ((s[i] == (unsigned char)c) || (c == '\0'))return ((char *)&s[i]);return (0);}char *ft_substr(char *s, unsigned int start, size_t len){size_t i;size_t j;char *sub;i = 0;j = 0;if (start >= ft_strlen(s) || !s || !len){sub = malloc(1 * sizeof(char));sub[0] = '\0';return (sub);}while (s[start + j] != '\0' && j < len)j++;if (s[start + j] != '\0')j++;sub = malloc((j + 1) * sizeof(char));if (!sub){free(s);return (0);}while (s[start] != '\0' && j > i)sub[i++] = s[start++];sub[i] = '\0';//free(s);return (sub);}char *ft_strjoin(char *s1, char *s2){char *cat;size_t i;size_t j;i = 0;j = 0;if (!s1){s1 = malloc(sizeof(char) * 1);s1[0] = '\0';}cat = (char *)malloc((ft_strlen(s1) + ft_strlen(s2) + 1) * sizeof(char));if (!cat)return (NULL);while (s1[i] != '\0'){cat[i] = s1[i];i++;}while (s2[j] != '\0')cat[i++] = s2[j++];free(s1);cat[i] = '\0';return (cat);}char *ft_content(int fd, char *content){char *buf;int buf_nb;buf_nb = 1;buf = (char *)malloc((BUFFER_SIZE + 1) * sizeof(char));if (!buf)return (0);while ((!ft_strchr(content, '\n')) && buf_nb != 0){buf_nb = read(fd, buf, BUFFER_SIZE);if (buf_nb == -1){free(buf);free(content);return (NULL);}buf[buf_nb] = '\0';content = ft_strjoin(content, buf);}free(buf);return (content);}char *get_next_line(int fd){static char *content;char *sub;int i;int len;i = 0;if (fd < 0 || BUFFER_SIZE <= 0)return (NULL);content = ft_content(fd, content);if (content == NULL)return (NULL);if (content[0] == '\0')return (NULL);while (content[i] != '\n' && content[i] != '\0')i++;sub = ft_substr(content, 0, i);len = ft_strlen(content);i++;content = ft_substr(content, i, len);return (sub);}int main(void){int a = open("exemplo.txt", O_RDONLY);printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));return (0);}') && (s[i] != (unsigned char)c))i++;if ((s[i] == (unsigned char)c) || (c == 'size_t ft_strlen(char *s){size_t i;if (!s)return (0);i = 0;while (s[i] != '\0')i++;return (i);}char *ft_strchr(char *s, int c){size_t i;i = 0;if (!s)return (0);while ((s[i] != '\0') && (s[i] != (unsigned char)c))i++;if ((s[i] == (unsigned char)c) || (c == '\0'))return ((char *)&s[i]);return (0);}char *ft_substr(char *s, unsigned int start, size_t len){size_t i;size_t j;char *sub;i = 0;j = 0;if (start >= ft_strlen(s) || !s || !len){sub = malloc(1 * sizeof(char));sub[0] = '\0';return (sub);}while (s[start + j] != '\0' && j < len)j++;if (s[start + j] != '\0')j++;sub = malloc((j + 1) * sizeof(char));if (!sub){free(s);return (0);}while (s[start] != '\0' && j > i)sub[i++] = s[start++];sub[i] = '\0';//free(s);return (sub);}char *ft_strjoin(char *s1, char *s2){char *cat;size_t i;size_t j;i = 0;j = 0;if (!s1){s1 = malloc(sizeof(char) * 1);s1[0] = '\0';}cat = (char *)malloc((ft_strlen(s1) + ft_strlen(s2) + 1) * sizeof(char));if (!cat)return (NULL);while (s1[i] != '\0'){cat[i] = s1[i];i++;}while (s2[j] != '\0')cat[i++] = s2[j++];free(s1);cat[i] = '\0';return (cat);}char *ft_content(int fd, char *content){char *buf;int buf_nb;buf_nb = 1;buf = (char *)malloc((BUFFER_SIZE + 1) * sizeof(char));if (!buf)return (0);while ((!ft_strchr(content, '\n')) && buf_nb != 0){buf_nb = read(fd, buf, BUFFER_SIZE);if (buf_nb == -1){free(buf);free(content);return (NULL);}buf[buf_nb] = '\0';content = ft_strjoin(content, buf);}free(buf);return (content);}char *get_next_line(int fd){static char *content;char *sub;int i;int len;i = 0;if (fd < 0 || BUFFER_SIZE <= 0)return (NULL);content = ft_content(fd, content);if (content == NULL)return (NULL);if (content[0] == '\0')return (NULL);while (content[i] != '\n' && content[i] != '\0')i++;sub = ft_substr(content, 0, i);len = ft_strlen(content);i++;content = ft_substr(content, i, len);return (sub);}int main(void){int a = open("exemplo.txt", O_RDONLY);printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));return (0);}'))return ((char *)&s[i]);return (0);}char *ft_substr(char *s, unsigned int start, size_t len){size_t i;size_t j;char *sub;i = 0;j = 0;if (start >= ft_strlen(s) || !s || !len){sub = malloc(1 * sizeof(char));sub[0] = 'size_t ft_strlen(char *s){size_t i;if (!s)return (0);i = 0;while (s[i] != '\0')i++;return (i);}char *ft_strchr(char *s, int c){size_t i;i = 0;if (!s)return (0);while ((s[i] != '\0') && (s[i] != (unsigned char)c))i++;if ((s[i] == (unsigned char)c) || (c == '\0'))return ((char *)&s[i]);return (0);}char *ft_substr(char *s, unsigned int start, size_t len){size_t i;size_t j;char *sub;i = 0;j = 0;if (start >= ft_strlen(s) || !s || !len){sub = malloc(1 * sizeof(char));sub[0] = '\0';return (sub);}while (s[start + j] != '\0' && j < len)j++;if (s[start + j] != '\0')j++;sub = malloc((j + 1) * sizeof(char));if (!sub){free(s);return (0);}while (s[start] != '\0' && j > i)sub[i++] = s[start++];sub[i] = '\0';//free(s);return (sub);}char *ft_strjoin(char *s1, char *s2){char *cat;size_t i;size_t j;i = 0;j = 0;if (!s1){s1 = malloc(sizeof(char) * 1);s1[0] = '\0';}cat = (char *)malloc((ft_strlen(s1) + ft_strlen(s2) + 1) * sizeof(char));if (!cat)return (NULL);while (s1[i] != '\0'){cat[i] = s1[i];i++;}while (s2[j] != '\0')cat[i++] = s2[j++];free(s1);cat[i] = '\0';return (cat);}char *ft_content(int fd, char *content){char *buf;int buf_nb;buf_nb = 1;buf = (char *)malloc((BUFFER_SIZE + 1) * sizeof(char));if (!buf)return (0);while ((!ft_strchr(content, '\n')) && buf_nb != 0){buf_nb = read(fd, buf, BUFFER_SIZE);if (buf_nb == -1){free(buf);free(content);return (NULL);}buf[buf_nb] = '\0';content = ft_strjoin(content, buf);}free(buf);return (content);}char *get_next_line(int fd){static char *content;char *sub;int i;int len;i = 0;if (fd < 0 || BUFFER_SIZE <= 0)return (NULL);content = ft_content(fd, content);if (content == NULL)return (NULL);if (content[0] == '\0')return (NULL);while (content[i] != '\n' && content[i] != '\0')i++;sub = ft_substr(content, 0, i);len = ft_strlen(content);i++;content = ft_substr(content, i, len);return (sub);}int main(void){int a = open("exemplo.txt", O_RDONLY);printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));return (0);}';return (sub);}while (s[start + j] != 'size_t ft_strlen(char *s){size_t i;if (!s)return (0);i = 0;while (s[i] != '\0')i++;return (i);}char *ft_strchr(char *s, int c){size_t i;i = 0;if (!s)return (0);while ((s[i] != '\0') && (s[i] != (unsigned char)c))i++;if ((s[i] == (unsigned char)c) || (c == '\0'))return ((char *)&s[i]);return (0);}char *ft_substr(char *s, unsigned int start, size_t len){size_t i;size_t j;char *sub;i = 0;j = 0;if (start >= ft_strlen(s) || !s || !len){sub = malloc(1 * sizeof(char));sub[0] = '\0';return (sub);}while (s[start + j] != '\0' && j < len)j++;if (s[start + j] != '\0')j++;sub = malloc((j + 1) * sizeof(char));if (!sub){free(s);return (0);}while (s[start] != '\0' && j > i)sub[i++] = s[start++];sub[i] = '\0';//free(s);return (sub);}char *ft_strjoin(char *s1, char *s2){char *cat;size_t i;size_t j;i = 0;j = 0;if (!s1){s1 = malloc(sizeof(char) * 1);s1[0] = '\0';}cat = (char *)malloc((ft_strlen(s1) + ft_strlen(s2) + 1) * sizeof(char));if (!cat)return (NULL);while (s1[i] != '\0'){cat[i] = s1[i];i++;}while (s2[j] != '\0')cat[i++] = s2[j++];free(s1);cat[i] = '\0';return (cat);}char *ft_content(int fd, char *content){char *buf;int buf_nb;buf_nb = 1;buf = (char *)malloc((BUFFER_SIZE + 1) * sizeof(char));if (!buf)return (0);while ((!ft_strchr(content, '\n')) && buf_nb != 0){buf_nb = read(fd, buf, BUFFER_SIZE);if (buf_nb == -1){free(buf);free(content);return (NULL);}buf[buf_nb] = '\0';content = ft_strjoin(content, buf);}free(buf);return (content);}char *get_next_line(int fd){static char *content;char *sub;int i;int len;i = 0;if (fd < 0 || BUFFER_SIZE <= 0)return (NULL);content = ft_content(fd, content);if (content == NULL)return (NULL);if (content[0] == '\0')return (NULL);while (content[i] != '\n' && content[i] != '\0')i++;sub = ft_substr(content, 0, i);len = ft_strlen(content);i++;content = ft_substr(content, i, len);return (sub);}int main(void){int a = open("exemplo.txt", O_RDONLY);printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));return (0);}' && j < len)j++;if (s[start + j] != 'size_t ft_strlen(char *s){size_t i;if (!s)return (0);i = 0;while (s[i] != '\0')i++;return (i);}char *ft_strchr(char *s, int c){size_t i;i = 0;if (!s)return (0);while ((s[i] != '\0') && (s[i] != (unsigned char)c))i++;if ((s[i] == (unsigned char)c) || (c == '\0'))return ((char *)&s[i]);return (0);}char *ft_substr(char *s, unsigned int start, size_t len){size_t i;size_t j;char *sub;i = 0;j = 0;if (start >= ft_strlen(s) || !s || !len){sub = malloc(1 * sizeof(char));sub[0] = '\0';return (sub);}while (s[start + j] != '\0' && j < len)j++;if (s[start + j] != '\0')j++;sub = malloc((j + 1) * sizeof(char));if (!sub){free(s);return (0);}while (s[start] != '\0' && j > i)sub[i++] = s[start++];sub[i] = '\0';//free(s);return (sub);}char *ft_strjoin(char *s1, char *s2){char *cat;size_t i;size_t j;i = 0;j = 0;if (!s1){s1 = malloc(sizeof(char) * 1);s1[0] = '\0';}cat = (char *)malloc((ft_strlen(s1) + ft_strlen(s2) + 1) * sizeof(char));if (!cat)return (NULL);while (s1[i] != '\0'){cat[i] = s1[i];i++;}while (s2[j] != '\0')cat[i++] = s2[j++];free(s1);cat[i] = '\0';return (cat);}char *ft_content(int fd, char *content){char *buf;int buf_nb;buf_nb = 1;buf = (char *)malloc((BUFFER_SIZE + 1) * sizeof(char));if (!buf)return (0);while ((!ft_strchr(content, '\n')) && buf_nb != 0){buf_nb = read(fd, buf, BUFFER_SIZE);if (buf_nb == -1){free(buf);free(content);return (NULL);}buf[buf_nb] = '\0';content = ft_strjoin(content, buf);}free(buf);return (content);}char *get_next_line(int fd){static char *content;char *sub;int i;int len;i = 0;if (fd < 0 || BUFFER_SIZE <= 0)return (NULL);content = ft_content(fd, content);if (content == NULL)return (NULL);if (content[0] == '\0')return (NULL);while (content[i] != '\n' && content[i] != '\0')i++;sub = ft_substr(content, 0, i);len = ft_strlen(content);i++;content = ft_substr(content, i, len);return (sub);}int main(void){int a = open("exemplo.txt", O_RDONLY);printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));return (0);}')j++;sub = malloc((j + 1) * sizeof(char));if (!sub){free(s);return (0);}while (s[start] != 'size_t ft_strlen(char *s){size_t i;if (!s)return (0);i = 0;while (s[i] != '\0')i++;return (i);}char *ft_strchr(char *s, int c){size_t i;i = 0;if (!s)return (0);while ((s[i] != '\0') && (s[i] != (unsigned char)c))i++;if ((s[i] == (unsigned char)c) || (c == '\0'))return ((char *)&s[i]);return (0);}char *ft_substr(char *s, unsigned int start, size_t len){size_t i;size_t j;char *sub;i = 0;j = 0;if (start >= ft_strlen(s) || !s || !len){sub = malloc(1 * sizeof(char));sub[0] = '\0';return (sub);}while (s[start + j] != '\0' && j < len)j++;if (s[start + j] != '\0')j++;sub = malloc((j + 1) * sizeof(char));if (!sub){free(s);return (0);}while (s[start] != '\0' && j > i)sub[i++] = s[start++];sub[i] = '\0';//free(s);return (sub);}char *ft_strjoin(char *s1, char *s2){char *cat;size_t i;size_t j;i = 0;j = 0;if (!s1){s1 = malloc(sizeof(char) * 1);s1[0] = '\0';}cat = (char *)malloc((ft_strlen(s1) + ft_strlen(s2) + 1) * sizeof(char));if (!cat)return (NULL);while (s1[i] != '\0'){cat[i] = s1[i];i++;}while (s2[j] != '\0')cat[i++] = s2[j++];free(s1);cat[i] = '\0';return (cat);}char *ft_content(int fd, char *content){char *buf;int buf_nb;buf_nb = 1;buf = (char *)malloc((BUFFER_SIZE + 1) * sizeof(char));if (!buf)return (0);while ((!ft_strchr(content, '\n')) && buf_nb != 0){buf_nb = read(fd, buf, BUFFER_SIZE);if (buf_nb == -1){free(buf);free(content);return (NULL);}buf[buf_nb] = '\0';content = ft_strjoin(content, buf);}free(buf);return (content);}char *get_next_line(int fd){static char *content;char *sub;int i;int len;i = 0;if (fd < 0 || BUFFER_SIZE <= 0)return (NULL);content = ft_content(fd, content);if (content == NULL)return (NULL);if (content[0] == '\0')return (NULL);while (content[i] != '\n' && content[i] != '\0')i++;sub = ft_substr(content, 0, i);len = ft_strlen(content);i++;content = ft_substr(content, i, len);return (sub);}int main(void){int a = open("exemplo.txt", O_RDONLY);printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));return (0);}' && j > i)sub[i++] = s[start++];sub[i] = 'size_t ft_strlen(char *s){size_t i;if (!s)return (0);i = 0;while (s[i] != '\0')i++;return (i);}char *ft_strchr(char *s, int c){size_t i;i = 0;if (!s)return (0);while ((s[i] != '\0') && (s[i] != (unsigned char)c))i++;if ((s[i] == (unsigned char)c) || (c == '\0'))return ((char *)&s[i]);return (0);}char *ft_substr(char *s, unsigned int start, size_t len){size_t i;size_t j;char *sub;i = 0;j = 0;if (start >= ft_strlen(s) || !s || !len){sub = malloc(1 * sizeof(char));sub[0] = '\0';return (sub);}while (s[start + j] != '\0' && j < len)j++;if (s[start + j] != '\0')j++;sub = malloc((j + 1) * sizeof(char));if (!sub){free(s);return (0);}while (s[start] != '\0' && j > i)sub[i++] = s[start++];sub[i] = '\0';//free(s);return (sub);}char *ft_strjoin(char *s1, char *s2){char *cat;size_t i;size_t j;i = 0;j = 0;if (!s1){s1 = malloc(sizeof(char) * 1);s1[0] = '\0';}cat = (char *)malloc((ft_strlen(s1) + ft_strlen(s2) + 1) * sizeof(char));if (!cat)return (NULL);while (s1[i] != '\0'){cat[i] = s1[i];i++;}while (s2[j] != '\0')cat[i++] = s2[j++];free(s1);cat[i] = '\0';return (cat);}char *ft_content(int fd, char *content){char *buf;int buf_nb;buf_nb = 1;buf = (char *)malloc((BUFFER_SIZE + 1) * sizeof(char));if (!buf)return (0);while ((!ft_strchr(content, '\n')) && buf_nb != 0){buf_nb = read(fd, buf, BUFFER_SIZE);if (buf_nb == -1){free(buf);free(content);return (NULL);}buf[buf_nb] = '\0';content = ft_strjoin(content, buf);}free(buf);return (content);}char *get_next_line(int fd){static char *content;char *sub;int i;int len;i = 0;if (fd < 0 || BUFFER_SIZE <= 0)return (NULL);content = ft_content(fd, content);if (content == NULL)return (NULL);if (content[0] == '\0')return (NULL);while (content[i] != '\n' && content[i] != '\0')i++;sub = ft_substr(content, 0, i);len = ft_strlen(content);i++;content = ft_substr(content, i, len);return (sub);}int main(void){int a = open("exemplo.txt", O_RDONLY);printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));return (0);}';//free(s);return (sub);}char *ft_strjoin(char *s1, char *s2){char *cat;size_t i;size_t j;i = 0;j = 0;if (!s1){s1 = malloc(sizeof(char) * 1);s1[0] = 'size_t ft_strlen(char *s){size_t i;if (!s)return (0);i = 0;while (s[i] != '\0')i++;return (i);}char *ft_strchr(char *s, int c){size_t i;i = 0;if (!s)return (0);while ((s[i] != '\0') && (s[i] != (unsigned char)c))i++;if ((s[i] == (unsigned char)c) || (c == '\0'))return ((char *)&s[i]);return (0);}char *ft_substr(char *s, unsigned int start, size_t len){size_t i;size_t j;char *sub;i = 0;j = 0;if (start >= ft_strlen(s) || !s || !len){sub = malloc(1 * sizeof(char));sub[0] = '\0';return (sub);}while (s[start + j] != '\0' && j < len)j++;if (s[start + j] != '\0')j++;sub = malloc((j + 1) * sizeof(char));if (!sub){free(s);return (0);}while (s[start] != '\0' && j > i)sub[i++] = s[start++];sub[i] = '\0';//free(s);return (sub);}char *ft_strjoin(char *s1, char *s2){char *cat;size_t i;size_t j;i = 0;j = 0;if (!s1){s1 = malloc(sizeof(char) * 1);s1[0] = '\0';}cat = (char *)malloc((ft_strlen(s1) + ft_strlen(s2) + 1) * sizeof(char));if (!cat)return (NULL);while (s1[i] != '\0'){cat[i] = s1[i];i++;}while (s2[j] != '\0')cat[i++] = s2[j++];free(s1);cat[i] = '\0';return (cat);}char *ft_content(int fd, char *content){char *buf;int buf_nb;buf_nb = 1;buf = (char *)malloc((BUFFER_SIZE + 1) * sizeof(char));if (!buf)return (0);while ((!ft_strchr(content, '\n')) && buf_nb != 0){buf_nb = read(fd, buf, BUFFER_SIZE);if (buf_nb == -1){free(buf);free(content);return (NULL);}buf[buf_nb] = '\0';content = ft_strjoin(content, buf);}free(buf);return (content);}char *get_next_line(int fd){static char *content;char *sub;int i;int len;i = 0;if (fd < 0 || BUFFER_SIZE <= 0)return (NULL);content = ft_content(fd, content);if (content == NULL)return (NULL);if (content[0] == '\0')return (NULL);while (content[i] != '\n' && content[i] != '\0')i++;sub = ft_substr(content, 0, i);len = ft_strlen(content);i++;content = ft_substr(content, i, len);return (sub);}int main(void){int a = open("exemplo.txt", O_RDONLY);printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));return (0);}';}cat = (char *)malloc((ft_strlen(s1) + ft_strlen(s2) + 1) * sizeof(char));if (!cat)return (NULL);while (s1[i] != 'size_t ft_strlen(char *s){size_t i;if (!s)return (0);i = 0;while (s[i] != '\0')i++;return (i);}char *ft_strchr(char *s, int c){size_t i;i = 0;if (!s)return (0);while ((s[i] != '\0') && (s[i] != (unsigned char)c))i++;if ((s[i] == (unsigned char)c) || (c == '\0'))return ((char *)&s[i]);return (0);}char *ft_substr(char *s, unsigned int start, size_t len){size_t i;size_t j;char *sub;i = 0;j = 0;if (start >= ft_strlen(s) || !s || !len){sub = malloc(1 * sizeof(char));sub[0] = '\0';return (sub);}while (s[start + j] != '\0' && j < len)j++;if (s[start + j] != '\0')j++;sub = malloc((j + 1) * sizeof(char));if (!sub){free(s);return (0);}while (s[start] != '\0' && j > i)sub[i++] = s[start++];sub[i] = '\0';//free(s);return (sub);}char *ft_strjoin(char *s1, char *s2){char *cat;size_t i;size_t j;i = 0;j = 0;if (!s1){s1 = malloc(sizeof(char) * 1);s1[0] = '\0';}cat = (char *)malloc((ft_strlen(s1) + ft_strlen(s2) + 1) * sizeof(char));if (!cat)return (NULL);while (s1[i] != '\0'){cat[i] = s1[i];i++;}while (s2[j] != '\0')cat[i++] = s2[j++];free(s1);cat[i] = '\0';return (cat);}char *ft_content(int fd, char *content){char *buf;int buf_nb;buf_nb = 1;buf = (char *)malloc((BUFFER_SIZE + 1) * sizeof(char));if (!buf)return (0);while ((!ft_strchr(content, '\n')) && buf_nb != 0){buf_nb = read(fd, buf, BUFFER_SIZE);if (buf_nb == -1){free(buf);free(content);return (NULL);}buf[buf_nb] = '\0';content = ft_strjoin(content, buf);}free(buf);return (content);}char *get_next_line(int fd){static char *content;char *sub;int i;int len;i = 0;if (fd < 0 || BUFFER_SIZE <= 0)return (NULL);content = ft_content(fd, content);if (content == NULL)return (NULL);if (content[0] == '\0')return (NULL);while (content[i] != '\n' && content[i] != '\0')i++;sub = ft_substr(content, 0, i);len = ft_strlen(content);i++;content = ft_substr(content, i, len);return (sub);}int main(void){int a = open("exemplo.txt", O_RDONLY);printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));return (0);}'){cat[i] = s1[i];i++;}while (s2[j] != 'size_t ft_strlen(char *s){size_t i;if (!s)return (0);i = 0;while (s[i] != '\0')i++;return (i);}char *ft_strchr(char *s, int c){size_t i;i = 0;if (!s)return (0);while ((s[i] != '\0') && (s[i] != (unsigned char)c))i++;if ((s[i] == (unsigned char)c) || (c == '\0'))return ((char *)&s[i]);return (0);}char *ft_substr(char *s, unsigned int start, size_t len){size_t i;size_t j;char *sub;i = 0;j = 0;if (start >= ft_strlen(s) || !s || !len){sub = malloc(1 * sizeof(char));sub[0] = '\0';return (sub);}while (s[start + j] != '\0' && j < len)j++;if (s[start + j] != '\0')j++;sub = malloc((j + 1) * sizeof(char));if (!sub){free(s);return (0);}while (s[start] != '\0' && j > i)sub[i++] = s[start++];sub[i] = '\0';//free(s);return (sub);}char *ft_strjoin(char *s1, char *s2){char *cat;size_t i;size_t j;i = 0;j = 0;if (!s1){s1 = malloc(sizeof(char) * 1);s1[0] = '\0';}cat = (char *)malloc((ft_strlen(s1) + ft_strlen(s2) + 1) * sizeof(char));if (!cat)return (NULL);while (s1[i] != '\0'){cat[i] = s1[i];i++;}while (s2[j] != '\0')cat[i++] = s2[j++];free(s1);cat[i] = '\0';return (cat);}char *ft_content(int fd, char *content){char *buf;int buf_nb;buf_nb = 1;buf = (char *)malloc((BUFFER_SIZE + 1) * sizeof(char));if (!buf)return (0);while ((!ft_strchr(content, '\n')) && buf_nb != 0){buf_nb = read(fd, buf, BUFFER_SIZE);if (buf_nb == -1){free(buf);free(content);return (NULL);}buf[buf_nb] = '\0';content = ft_strjoin(content, buf);}free(buf);return (content);}char *get_next_line(int fd){static char *content;char *sub;int i;int len;i = 0;if (fd < 0 || BUFFER_SIZE <= 0)return (NULL);content = ft_content(fd, content);if (content == NULL)return (NULL);if (content[0] == '\0')return (NULL);while (content[i] != '\n' && content[i] != '\0')i++;sub = ft_substr(content, 0, i);len = ft_strlen(content);i++;content = ft_substr(content, i, len);return (sub);}int main(void){int a = open("exemplo.txt", O_RDONLY);printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));return (0);}')cat[i++] = s2[j++];free(s1);cat[i] = 'size_t ft_strlen(char *s){size_t i;if (!s)return (0);i = 0;while (s[i] != '\0')i++;return (i);}char *ft_strchr(char *s, int c){size_t i;i = 0;if (!s)return (0);while ((s[i] != '\0') && (s[i] != (unsigned char)c))i++;if ((s[i] == (unsigned char)c) || (c == '\0'))return ((char *)&s[i]);return (0);}char *ft_substr(char *s, unsigned int start, size_t len){size_t i;size_t j;char *sub;i = 0;j = 0;if (start >= ft_strlen(s) || !s || !len){sub = malloc(1 * sizeof(char));sub[0] = '\0';return (sub);}while (s[start + j] != '\0' && j < len)j++;if (s[start + j] != '\0')j++;sub = malloc((j + 1) * sizeof(char));if (!sub){free(s);return (0);}while (s[start] != '\0' && j > i)sub[i++] = s[start++];sub[i] = '\0';//free(s);return (sub);}char *ft_strjoin(char *s1, char *s2){char *cat;size_t i;size_t j;i = 0;j = 0;if (!s1){s1 = malloc(sizeof(char) * 1);s1[0] = '\0';}cat = (char *)malloc((ft_strlen(s1) + ft_strlen(s2) + 1) * sizeof(char));if (!cat)return (NULL);while (s1[i] != '\0'){cat[i] = s1[i];i++;}while (s2[j] != '\0')cat[i++] = s2[j++];free(s1);cat[i] = '\0';return (cat);}char *ft_content(int fd, char *content){char *buf;int buf_nb;buf_nb = 1;buf = (char *)malloc((BUFFER_SIZE + 1) * sizeof(char));if (!buf)return (0);while ((!ft_strchr(content, '\n')) && buf_nb != 0){buf_nb = read(fd, buf, BUFFER_SIZE);if (buf_nb == -1){free(buf);free(content);return (NULL);}buf[buf_nb] = '\0';content = ft_strjoin(content, buf);}free(buf);return (content);}char *get_next_line(int fd){static char *content;char *sub;int i;int len;i = 0;if (fd < 0 || BUFFER_SIZE <= 0)return (NULL);content = ft_content(fd, content);if (content == NULL)return (NULL);if (content[0] == '\0')return (NULL);while (content[i] != '\n' && content[i] != '\0')i++;sub = ft_substr(content, 0, i);len = ft_strlen(content);i++;content = ft_substr(content, i, len);return (sub);}int main(void){int a = open("exemplo.txt", O_RDONLY);printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));return (0);}';return (cat);}char *ft_content(int fd, char *content){char *buf;int buf_nb;buf_nb = 1;buf = (char *)malloc((BUFFER_SIZE + 1) * sizeof(char));if (!buf)return (0);while ((!ft_strchr(content, '\n')) && buf_nb != 0){buf_nb = read(fd, buf, BUFFER_SIZE);if (buf_nb == -1){free(buf);free(content);return (NULL);}buf[buf_nb] = 'size_t ft_strlen(char *s){size_t i;if (!s)return (0);i = 0;while (s[i] != '\0')i++;return (i);}char *ft_strchr(char *s, int c){size_t i;i = 0;if (!s)return (0);while ((s[i] != '\0') && (s[i] != (unsigned char)c))i++;if ((s[i] == (unsigned char)c) || (c == '\0'))return ((char *)&s[i]);return (0);}char *ft_substr(char *s, unsigned int start, size_t len){size_t i;size_t j;char *sub;i = 0;j = 0;if (start >= ft_strlen(s) || !s || !len){sub = malloc(1 * sizeof(char));sub[0] = '\0';return (sub);}while (s[start + j] != '\0' && j < len)j++;if (s[start + j] != '\0')j++;sub = malloc((j + 1) * sizeof(char));if (!sub){free(s);return (0);}while (s[start] != '\0' && j > i)sub[i++] = s[start++];sub[i] = '\0';//free(s);return (sub);}char *ft_strjoin(char *s1, char *s2){char *cat;size_t i;size_t j;i = 0;j = 0;if (!s1){s1 = malloc(sizeof(char) * 1);s1[0] = '\0';}cat = (char *)malloc((ft_strlen(s1) + ft_strlen(s2) + 1) * sizeof(char));if (!cat)return (NULL);while (s1[i] != '\0'){cat[i] = s1[i];i++;}while (s2[j] != '\0')cat[i++] = s2[j++];free(s1);cat[i] = '\0';return (cat);}char *ft_content(int fd, char *content){char *buf;int buf_nb;buf_nb = 1;buf = (char *)malloc((BUFFER_SIZE + 1) * sizeof(char));if (!buf)return (0);while ((!ft_strchr(content, '\n')) && buf_nb != 0){buf_nb = read(fd, buf, BUFFER_SIZE);if (buf_nb == -1){free(buf);free(content);return (NULL);}buf[buf_nb] = '\0';content = ft_strjoin(content, buf);}free(buf);return (content);}char *get_next_line(int fd){static char *content;char *sub;int i;int len;i = 0;if (fd < 0 || BUFFER_SIZE <= 0)return (NULL);content = ft_content(fd, content);if (content == NULL)return (NULL);if (content[0] == '\0')return (NULL);while (content[i] != '\n' && content[i] != '\0')i++;sub = ft_substr(content, 0, i);len = ft_strlen(content);i++;content = ft_substr(content, i, len);return (sub);}int main(void){int a = open("exemplo.txt", O_RDONLY);printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));return (0);}';content = ft_strjoin(content, buf);}free(buf);return (content);}char *get_next_line(int fd){static char *content;char *sub;int i;int len;i = 0;if (fd < 0 || BUFFER_SIZE <= 0)return (NULL);content = ft_content(fd, content);if (content == NULL)return (NULL);if (content[0] == 'size_t ft_strlen(char *s){size_t i;if (!s)return (0);i = 0;while (s[i] != '\0')i++;return (i);}char *ft_strchr(char *s, int c){size_t i;i = 0;if (!s)return (0);while ((s[i] != '\0') && (s[i] != (unsigned char)c))i++;if ((s[i] == (unsigned char)c) || (c == '\0'))return ((char *)&s[i]);return (0);}char *ft_substr(char *s, unsigned int start, size_t len){size_t i;size_t j;char *sub;i = 0;j = 0;if (start >= ft_strlen(s) || !s || !len){sub = malloc(1 * sizeof(char));sub[0] = '\0';return (sub);}while (s[start + j] != '\0' && j < len)j++;if (s[start + j] != '\0')j++;sub = malloc((j + 1) * sizeof(char));if (!sub){free(s);return (0);}while (s[start] != '\0' && j > i)sub[i++] = s[start++];sub[i] = '\0';//free(s);return (sub);}char *ft_strjoin(char *s1, char *s2){char *cat;size_t i;size_t j;i = 0;j = 0;if (!s1){s1 = malloc(sizeof(char) * 1);s1[0] = '\0';}cat = (char *)malloc((ft_strlen(s1) + ft_strlen(s2) + 1) * sizeof(char));if (!cat)return (NULL);while (s1[i] != '\0'){cat[i] = s1[i];i++;}while (s2[j] != '\0')cat[i++] = s2[j++];free(s1);cat[i] = '\0';return (cat);}char *ft_content(int fd, char *content){char *buf;int buf_nb;buf_nb = 1;buf = (char *)malloc((BUFFER_SIZE + 1) * sizeof(char));if (!buf)return (0);while ((!ft_strchr(content, '\n')) && buf_nb != 0){buf_nb = read(fd, buf, BUFFER_SIZE);if (buf_nb == -1){free(buf);free(content);return (NULL);}buf[buf_nb] = '\0';content = ft_strjoin(content, buf);}free(buf);return (content);}char *get_next_line(int fd){static char *content;char *sub;int i;int len;i = 0;if (fd < 0 || BUFFER_SIZE <= 0)return (NULL);content = ft_content(fd, content);if (content == NULL)return (NULL);if (content[0] == '\0')return (NULL);while (content[i] != '\n' && content[i] != '\0')i++;sub = ft_substr(content, 0, i);len = ft_strlen(content);i++;content = ft_substr(content, i, len);return (sub);}int main(void){int a = open("exemplo.txt", O_RDONLY);printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));return (0);}')return (NULL);while (content[i] != '\n' && content[i] != 'size_t ft_strlen(char *s){size_t i;if (!s)return (0);i = 0;while (s[i] != '\0')i++;return (i);}char *ft_strchr(char *s, int c){size_t i;i = 0;if (!s)return (0);while ((s[i] != '\0') && (s[i] != (unsigned char)c))i++;if ((s[i] == (unsigned char)c) || (c == '\0'))return ((char *)&s[i]);return (0);}char *ft_substr(char *s, unsigned int start, size_t len){size_t i;size_t j;char *sub;i = 0;j = 0;if (start >= ft_strlen(s) || !s || !len){sub = malloc(1 * sizeof(char));sub[0] = '\0';return (sub);}while (s[start + j] != '\0' && j < len)j++;if (s[start + j] != '\0')j++;sub = malloc((j + 1) * sizeof(char));if (!sub){free(s);return (0);}while (s[start] != '\0' && j > i)sub[i++] = s[start++];sub[i] = '\0';//free(s);return (sub);}char *ft_strjoin(char *s1, char *s2){char *cat;size_t i;size_t j;i = 0;j = 0;if (!s1){s1 = malloc(sizeof(char) * 1);s1[0] = '\0';}cat = (char *)malloc((ft_strlen(s1) + ft_strlen(s2) + 1) * sizeof(char));if (!cat)return (NULL);while (s1[i] != '\0'){cat[i] = s1[i];i++;}while (s2[j] != '\0')cat[i++] = s2[j++];free(s1);cat[i] = '\0';return (cat);}char *ft_content(int fd, char *content){char *buf;int buf_nb;buf_nb = 1;buf = (char *)malloc((BUFFER_SIZE + 1) * sizeof(char));if (!buf)return (0);while ((!ft_strchr(content, '\n')) && buf_nb != 0){buf_nb = read(fd, buf, BUFFER_SIZE);if (buf_nb == -1){free(buf);free(content);return (NULL);}buf[buf_nb] = '\0';content = ft_strjoin(content, buf);}free(buf);return (content);}char *get_next_line(int fd){static char *content;char *sub;int i;int len;i = 0;if (fd < 0 || BUFFER_SIZE <= 0)return (NULL);content = ft_content(fd, content);if (content == NULL)return (NULL);if (content[0] == '\0')return (NULL);while (content[i] != '\n' && content[i] != '\0')i++;sub = ft_substr(content, 0, i);len = ft_strlen(content);i++;content = ft_substr(content, i, len);return (sub);}int main(void){int a = open("exemplo.txt", O_RDONLY);printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));return (0);}')i++;sub = ft_substr(content, 0, i);len = ft_strlen(content);i++;content = ft_substr(content, i, len);return (sub);}int main(void){int a = open("exemplo.txt", O_RDONLY);printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));printf("%s", get_next_line(a));return (0);}
I've done several changes but I always get memory leaks and segmentation fault.
What I expected was just to read the file.
答案1
得分: 1
如果您正在使用gcc或clang编译器，您可以尝试在编译程序时使用命令行选项-fsanitize=leak，以检测任何内存泄漏。
有关更多信息，请参阅gcc手册中的此页面。
英文:
If you are using the compilers gcc or clang, you can try using the command-line option -fsanitize=leak when compiling the program, in order to detect any memory leaks.
See this page from the gcc manual for further information.
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