Reads data from stdin until EOF. Saves data to a memory buffer.

readStdinToBuffer.c

void* readStdinToBuffer(size_t* readSize)
{
    const size_t INITIAL_SIZE = 10;
    size_t size = INITIAL_SIZE;
    char* buffer = malloc(size);

    size_t i = 0;
    while (1) {
        if (i >= size) {
            size *= 2;
            buffer = realloc(buffer, size);
        }

        buffer[i] = fgetc(stdin);
        if (feof(stdin)){
            buffer = realloc(buffer, i);
            *readSize = i;
            break;
        }
        ++i;
    }
    return buffer;
}