heap_str_io.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#include <memory.h>
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>


struct heap_str{
    size_t heap_sz;
    size_t len;
    char* str;
};

typedef struct heap_str heap_str_t;

heap_str_t heap_str_init(const size_t init_sz){
    heap_str_t heap_str={init_sz, 0, (char*)malloc(init_sz)};
    return heap_str;
}

_Bool unix_read_file(heap_str_t* const restrict heap_str,const char* filenm){
    int fd=open(filenm, O_RDONLY);
    if(fd>0){
        struct stat stats;
        fstat(fd, &stats);
        heap_str->len=stats.st_size;
        if(stats.st_size>heap_str->heap_sz){
            heap_str->str=(char*)realloc(heap_str->str, (heap_str->heap_sz=stats.st_size));
        }
        read(fd, heap_str->str, stats.st_size);
        close(fd);
    }else return 0;
    return 1;
}

_Bool read_text_file(heap_str_t* const restrict heap_str, const char* filenm){
    FILE* const f=fopen(filenm, "r");
    if(f){
        fseek(f, 0, SEEK_END);
        heap_str->len=ftell(f);
        fseek(f, 0, SEEK_SET);
        if(heap_str->len>heap_str->heap_sz)
            heap_str->str=(char*)realloc(heap_str->str,(heap_str->heap_sz=heap_str->len));
            
        fread(heap_str->str,1, heap_str->len, f);
        fclose(f);
        
    }else return 0;
    return 1;
}