nese/src/compat.c

#include <stdio.h>

#include "compat_impl.h"


#if !defined (__unix__) && !(defined (__APPLE__) && defined (__MACH__))

#include <stdlib.h>
#include <string.h>

/*
static inline size_t strnlen(const char* str, size_t size) {
    int len = 0, remain = size;
    while (remain > 0 && *str++) --remain;
    return (size - remain);
}
*/

char* strndup(const char *str, size_t size) {
    size_t len = strnlen(str, size);
    char* dup = malloc(len + 1);
    dup[len] = '\0';
    return memcpy(dup, str, len);
}

ssize_t getline(char **restrict lineptr, size_t *restrict n,
                FILE *restrict stream) {
    if (NULL == *lineptr || 0 == *n) {
        *n = 120;
        *lineptr = (char*)malloc(*n);
        if (NULL == *lineptr) return -1;
    }

    int chr = 0;
    ssize_t len = 0;
    char* ptr = *lineptr;
    while ((chr = fgetc(stream)) >= 0) {
        ++len;
        *ptr++ = chr;
        if (*n < len + 1) {
            char* more = realloc(*lineptr, *n * 2);
            if (NULL == more) return -1;
            *lineptr = more;
            *n *= 2;
            ptr = *lineptr + len;
        }
        if ('\n' == chr) break;
    }

    *ptr = '\0';

    return (len == 0 ? -1 : len);
}


#endif