janet/core/client.c

/*
* Copyright (c) 2017 Calvin Rose
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/

#include <stdlib.h>
#include <stdio.h>
#include <dst/dst.h>
#include "bootstrap.h"


/* Simple read line functionality */
static char *dst_getline() {
    char *line = malloc(100);
    char *linep = line;
    size_t lenmax = 100;
    size_t len = lenmax;
    int c;
    if (line == NULL)
        return NULL;
    for (;;) {
        c = fgetc(stdin);
        if (c == EOF)
            break;
        if (--len == 0) {
            len = lenmax;
            char *linen = realloc(linep, lenmax *= 2);
            if (linen == NULL) {
                free(linep);
                return NULL;
            }
            line = linen + (line - linep);
            linep = linen;
        }
        if ((*line++ = c) == '\n')
            break;
    }
    *line = '\0';
    return linep;
}

int main(int argc, const char **argv) {

    Dst *vm = dst_init();
    for (;;) {
        char *line = dst_getline();
        if (line) {
            uint32_t len = 0;
            int status = dst_parsec(vm, 0, line);
            if (status == PARSE_OK) {
                dst_description(vm, 0, 0);
            }
            const uint8_t *b = dst_bytes(vm, 0, &len);
            for (uint32_t i = 0; i < len; ++i) {
                putc(b[i]);
            }
            putc('\n');
        } else {
            break;
        }
    }
    dst_deinit(vm);

    return 0;
}