Unnamed

#include <stdio.h>#include <stdlib.h>// Returns pointer to a line read from fp (excluding line-ending), returns NULL// on error or if EOF is reached.#define INITIAL_SIZE 1#define INCREMENT 1 static char *read_line(FILE *fp){    int c, bufsize = INITIAL_SIZE, len = 0;    char *buffer = (char *) malloc(sizeof(char) * INITIAL_SIZE);        if (buffer == NULL)        return NULL;    while (1) {            c = fgetc(fp);        if (c == EOF) {            if (len == 0) {                // Reached end of line without actually reading anything, return NULL;                free(buffer);                return NULL;            }            break;        } else if (c == '\n') {            break;        } else if (c == '\r') { // Mac or Win line-ending            // Attempt to read optional \n (Win line-ending).            c = fgetc(fp);            if (c != '\n')                ungetc(c, fp);            break;        } else {            if (len > bufsize-1) {                                // TODO: handle realloc returning NULL properly                bufsize += INCREMENT;                buffer = (char *) realloc(buffer, sizeof(char) * bufsize);                if (buffer == NULL) fprintf(stderr, "oh crap\n");            }            buffer[len] = c;            len++;        }    }    buffer[len] = '\0';    return buffer;}int main(int argc, char **argv){    FILE *file;    char *line;    if (argc < 2) {        printf("Add filename to read as commandline argument\n");        return 1;    }    if ( (file = fopen(argv[1], "rb")) == NULL ) {        fprintf(stderr, "Failed to open file.\n");        return 1;    }    while ((line = read_line(file)) != NULL) {        printf("line read: %s\n", line);        free(line);    }    return 0;}