mirror of
https://github.com/janet-lang/janet
synced 2024-11-16 05:34:48 +00:00
709 lines
20 KiB
C
709 lines
20 KiB
C
/*
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* Copyright (c) 2017 Calvin Rose
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <dst/dst.h>
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#include "strtod.h"
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#include "gc.h"
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#include "util.h"
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/* Begin building a string */
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uint8_t *dst_string_begin(int32_t length) {
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char *data = dst_gcalloc(DST_MEMORY_STRING, 2 * sizeof(int32_t) + length + 1);
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uint8_t *str = (uint8_t *) (data + 2 * sizeof(int32_t));
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dst_string_length(str) = length;
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str[length] = 0;
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return str;
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}
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/* Finish building a string */
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const uint8_t *dst_string_end(uint8_t *str) {
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dst_string_hash(str) = dst_string_calchash(str, dst_string_length(str));
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return str;
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}
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/* Load a buffer as a string */
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const uint8_t *dst_string(const uint8_t *buf, int32_t len) {
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int32_t hash = dst_string_calchash(buf, len);
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char *data = dst_gcalloc(DST_MEMORY_STRING, 2 * sizeof(int32_t) + len + 1);
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uint8_t *str = (uint8_t *) (data + 2 * sizeof(int32_t));
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memcpy(str, buf, len);
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str[len] = 0;
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dst_string_length(str) = len;
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dst_string_hash(str) = hash;
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return str;
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}
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/* Compare two strings */
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int dst_string_compare(const uint8_t *lhs, const uint8_t *rhs) {
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int32_t xlen = dst_string_length(lhs);
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int32_t ylen = dst_string_length(rhs);
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int32_t len = xlen > ylen ? ylen : xlen;
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int32_t i;
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for (i = 0; i < len; ++i) {
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if (lhs[i] == rhs[i]) {
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continue;
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} else if (lhs[i] < rhs[i]) {
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return -1; /* x is less than y */
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} else {
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return 1; /* y is less than x */
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}
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}
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if (xlen == ylen) {
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return 0;
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} else {
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return xlen < ylen ? -1 : 1;
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}
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}
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/* Compare a dst string with a piece of memory */
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int dst_string_equalconst(const uint8_t *lhs, const uint8_t *rhs, int32_t rlen, int32_t rhash) {
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int32_t index;
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int32_t lhash = dst_string_hash(lhs);
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int32_t llen = dst_string_length(lhs);
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if (lhs == rhs)
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return 1;
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if (lhash != rhash || llen != rlen)
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return 0;
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for (index = 0; index < llen; index++) {
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if (lhs[index] != rhs[index])
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return 0;
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}
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return 1;
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}
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/* Check if two strings are equal */
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int dst_string_equal(const uint8_t *lhs, const uint8_t *rhs) {
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return dst_string_equalconst(lhs, rhs,
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dst_string_length(rhs), dst_string_hash(rhs));
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}
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/* Load a c string */
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const uint8_t *dst_cstring(const char *str) {
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int32_t len = 0;
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while (str[len]) ++len;
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return dst_string((const uint8_t *)str, len);
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}
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/* Temporary buffer size */
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#define DST_BUFSIZE 36
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static int32_t real_to_string_impl(uint8_t *buf, double x) {
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int count = snprintf((char *) buf, DST_BUFSIZE, "%.17gr", x);
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return (int32_t) count;
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}
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static void real_to_string_b(DstBuffer *buffer, double x) {
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dst_buffer_ensure(buffer, buffer->count + DST_BUFSIZE);
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buffer->count += real_to_string_impl(buffer->data + buffer->count, x);
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}
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static const uint8_t *real_to_string(double x) {
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uint8_t buf[DST_BUFSIZE];
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return dst_string(buf, real_to_string_impl(buf, x));
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}
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static int32_t integer_to_string_impl(uint8_t *buf, int32_t x) {
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int neg = 0;
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uint8_t *hi, *low;
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int32_t count = 0;
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if (x == 0) {
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buf[0] = '0';
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return 1;
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}
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if (x < 0) {
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neg = 1;
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x = -x;
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}
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while (x > 0) {
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uint8_t digit = x % 10;
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buf[count++] = '0' + digit;
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x /= 10;
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}
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if (neg)
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buf[count++] = '-';
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/* Reverse */
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hi = buf + count - 1;
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low = buf;
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while (hi > low) {
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uint8_t temp = *low;
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*low++ = *hi;
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*hi-- = temp;
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}
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return count;
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}
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static void integer_to_string_b(DstBuffer *buffer, int32_t x) {
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dst_buffer_extra(buffer, DST_BUFSIZE);
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buffer->count += integer_to_string_impl(buffer->data + buffer->count, x);
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}
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static const uint8_t *integer_to_string(int32_t x) {
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uint8_t buf[DST_BUFSIZE];
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return dst_string(buf, integer_to_string_impl(buf, x));
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}
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#define HEX(i) (((uint8_t *) dst_base64)[(i)])
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/* Returns a string description for a pointer. Truncates
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* title to 12 characters */
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static int32_t string_description_impl(uint8_t *buf, const char *title, void *pointer) {
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uint8_t *c = buf;
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int32_t i;
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union {
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uint8_t bytes[sizeof(void *)];
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void *p;
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} pbuf;
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pbuf.p = pointer;
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*c++ = '<';
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for (i = 0; title[i] && i < 12; ++i)
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*c++ = ((uint8_t *)title) [i];
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*c++ = ' ';
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*c++ = '0';
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*c++ = 'x';
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for (i = sizeof(void *); i > 0; --i) {
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uint8_t byte = pbuf.bytes[i - 1];
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if (!byte) continue;
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*c++ = HEX(byte >> 4);
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*c++ = HEX(byte & 0xF);
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}
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*c++ = '>';
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return (int32_t) (c - buf);
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}
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static void string_description_b(DstBuffer *buffer, const char *title, void *pointer) {
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dst_buffer_ensure(buffer, buffer->count + DST_BUFSIZE);
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buffer->count += string_description_impl(buffer->data + buffer->count, title, pointer);
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}
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/* Describes a pointer with a title (string_description("bork", myp) returns
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* a string "<bork 0x12345678>") */
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static const uint8_t *string_description(const char *title, void *pointer) {
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uint8_t buf[DST_BUFSIZE];
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return dst_string(buf, string_description_impl(buf, title, pointer));
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}
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#undef HEX
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#undef DST_BUFSIZE
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/* TODO - add more characters to escapes */
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static int32_t dst_escape_string_length(const uint8_t *str) {
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int32_t len = 2;
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int32_t i;
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for (i = 0; i < dst_string_length(str); ++i) {
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switch (str[i]) {
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case '"':
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case '\n':
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case '\r':
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case '\0':
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len += 2;
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break;
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default:
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len += 1;
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break;
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}
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}
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return len;
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}
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static void dst_escape_string_impl(uint8_t *buf, const uint8_t *str) {
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int32_t i, j;
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buf[0] = '"';
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for (i = 0, j = 1; i < dst_string_length(str); ++i) {
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uint8_t c = str[i];
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switch (c) {
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case '"':
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buf[j++] = '\\';
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buf[j++] = '"';
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break;
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case '\n':
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buf[j++] = '\\';
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buf[j++] = 'n';
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break;
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case '\r':
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buf[j++] = '\\';
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buf[j++] = 'r';
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break;
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case '\0':
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buf[j++] = '\\';
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buf[j++] = '0';
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break;
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default:
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buf[j++] = c;
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break;
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}
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}
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buf[j++] = '"';
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}
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void dst_escape_string_b(DstBuffer *buffer, const uint8_t *str) {
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int32_t len = dst_escape_string_length(str);
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dst_buffer_extra(buffer, len);
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dst_escape_string_impl(buffer->data + buffer->count, str);
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buffer->count += len;
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}
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const uint8_t *dst_escape_string(const uint8_t *str) {
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int32_t len = dst_escape_string_length(str);
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uint8_t *buf = dst_string_begin(len);
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dst_escape_string_impl(buf, str);
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return dst_string_end(buf);
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}
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/* Returns a string pointer with the description of the string */
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const uint8_t *dst_short_description(Dst x) {
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switch (dst_type(x)) {
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case DST_NIL:
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return dst_cstring("nil");
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case DST_TRUE:
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return dst_cstring("true");
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case DST_FALSE:
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return dst_cstring("false");
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case DST_REAL:
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return real_to_string(dst_unwrap_real(x));
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case DST_INTEGER:
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return integer_to_string(dst_unwrap_integer(x));
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case DST_SYMBOL:
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return dst_unwrap_string(x);
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case DST_STRING:
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return dst_escape_string(dst_unwrap_string(x));
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case DST_ABSTRACT:
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return string_description(
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dst_abstract_type(dst_unwrap_abstract(x))->name,
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dst_unwrap_abstract(x));
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default:
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return string_description(dst_type_names[dst_type(x)], dst_unwrap_pointer(x));
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}
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}
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void dst_short_description_b(DstBuffer *buffer, Dst x) {
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switch (dst_type(x)) {
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case DST_NIL:
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dst_buffer_push_cstring(buffer, "nil");
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return;
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case DST_TRUE:
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dst_buffer_push_cstring(buffer, "true");
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return;
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case DST_FALSE:
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dst_buffer_push_cstring(buffer, "false");
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return;
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case DST_REAL:
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real_to_string_b(buffer, dst_unwrap_real(x));
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return;
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case DST_INTEGER:
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integer_to_string_b(buffer, dst_unwrap_integer(x));
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return;
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case DST_SYMBOL:
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dst_buffer_push_bytes(buffer,
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dst_unwrap_string(x),
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dst_string_length(dst_unwrap_string(x)));
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return;
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case DST_STRING:
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dst_escape_string_b(buffer, dst_unwrap_string(x));
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return;
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case DST_ABSTRACT:
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string_description_b(buffer,
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dst_abstract_type(dst_unwrap_abstract(x))->name,
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dst_unwrap_abstract(x));
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return;
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default:
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string_description_b(buffer, dst_type_names[dst_type(x)], dst_unwrap_pointer(x));
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break;
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}
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}
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/* Helper structure for stringifying nested structures */
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typedef struct DstPrinter DstPrinter;
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struct DstPrinter {
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DstBuffer *buffer;
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DstTable seen;
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uint32_t flags;
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uint32_t state;
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int32_t next;
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int32_t indent;
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int32_t indent_size;
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int32_t token_line_limit;
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int32_t depth;
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};
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#define DST_PRINTFLAG_INDENT 1
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#define DST_PRINTFLAG_TABLEPAIR 2
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#define DST_PRINTFLAG_COLORIZE 4
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#define DST_PRINTFLAG_ALLMAN 8
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/* Go to next line for printer */
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static void dst_print_indent(DstPrinter *p) {
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int32_t i, len;
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len = p->indent_size * p->indent;
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for (i = 0; i < len; i++) {
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dst_buffer_push_u8(p->buffer, ' ');
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}
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}
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/* Check if a value is a print atom (not a printable data structure) */
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static int is_print_ds(Dst v) {
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switch (dst_type(v)) {
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default: return 0;
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case DST_ARRAY:
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case DST_STRUCT:
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case DST_TUPLE:
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case DST_TABLE: return 1;
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}
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}
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/* VT100 Colors for types */
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/* TODO - generalize into configurable headers and footers */
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/*
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DST_NIL,
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DST_FALSE,
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DST_TRUE,
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DST_FIBER,
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DST_INTEGER,
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DST_REAL,
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DST_STRING,
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DST_SYMBOL,
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DST_ARRAY,
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DST_TUPLE,
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DST_TABLE,
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DST_STRUCT,
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DST_BUFFER,
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DST_FUNCTION,
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DST_CFUNCTION,
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DST_ABSTRACT
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*/
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static const char *dst_type_colors[16] = {
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"\x1B[35m",
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"\x1B[35m",
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"\x1B[35m",
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"",
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"\x1B[33m",
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"\x1B[33m",
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"\x1B[36m",
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"",
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"",
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"",
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"",
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"",
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"",
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"",
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"",
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""
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};
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/* Forward declaration */
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static void dst_description_helper(DstPrinter *p, Dst x);
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/* Print a hastable view inline */
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static void dst_print_hashtable_inner(DstPrinter *p, const DstKV *data, int32_t len, int32_t cap) {
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int32_t i;
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int doindent = 0;
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if (p->flags & DST_PRINTFLAG_INDENT) {
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if (len <= p->token_line_limit) {
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for (i = 0; i < cap; i++) {
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const DstKV *kv = data + i;
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if (is_print_ds(kv->key) ||
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is_print_ds(kv->value)) {
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doindent = 1;
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break;
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}
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}
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} else {
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doindent = 1;
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}
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}
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if (doindent) {
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dst_buffer_push_u8(p->buffer, '\n');
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p->indent++;
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for (i = 0; i < cap; i++) {
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const DstKV *kv = data + i;
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if (!dst_checktype(kv->key, DST_NIL)) {
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dst_print_indent(p);
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dst_description_helper(p, kv->key);
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dst_buffer_push_u8(p->buffer, ' ');
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dst_description_helper(p, kv->value);
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dst_buffer_push_u8(p->buffer, '\n');
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}
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}
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p->indent--;
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dst_print_indent(p);
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} else {
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int isfirst = 1;
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for (i = 0; i < cap; i++) {
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const DstKV *kv = data + i;
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if (!dst_checktype(kv->key, DST_NIL)) {
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if (isfirst)
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isfirst = 0;
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else
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dst_buffer_push_u8(p->buffer, ' ');
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dst_description_helper(p, kv->key);
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dst_buffer_push_u8(p->buffer, ' ');
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dst_description_helper(p, kv->value);
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}
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}
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}
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}
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/* Help print a sequence */
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static void dst_print_seq_inner(DstPrinter *p, const Dst *data, int32_t len) {
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int32_t i;
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int doindent = 0;
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if (p->flags & DST_PRINTFLAG_INDENT) {
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if (len <= p->token_line_limit) {
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for (i = 0; i < len; ++i) {
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if (is_print_ds(data[i])) {
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doindent = 1;
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break;
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}
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}
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} else {
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doindent = 1;
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}
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}
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if (doindent) {
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dst_buffer_push_u8(p->buffer, '\n');
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p->indent++;
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for (i = 0; i < len; ++i) {
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dst_print_indent(p);
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dst_description_helper(p, data[i]);
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dst_buffer_push_u8(p->buffer, '\n');
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}
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p->indent--;
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dst_print_indent(p);
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} else {
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for (i = 0; i < len; ++i) {
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dst_description_helper(p, data[i]);
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if (i != len - 1)
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dst_buffer_push_u8(p->buffer, ' ');
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}
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}
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}
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/* Static debug print helper */
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static void dst_description_helper(DstPrinter *p, Dst x) {
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const char *open;
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const char *close;
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int32_t len, cap;
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const Dst *data;
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const DstKV *kvs;
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Dst check;
|
|
p->depth--;
|
|
switch (dst_type(x)) {
|
|
default:
|
|
if (p->flags & DST_PRINTFLAG_COLORIZE) {
|
|
dst_buffer_push_cstring(p->buffer, dst_type_colors[dst_type(x)]);
|
|
dst_short_description_b(p->buffer, x);
|
|
dst_buffer_push_cstring(p->buffer, "\x1B[0m");
|
|
} else {
|
|
dst_short_description_b(p->buffer, x);
|
|
}
|
|
p->depth++;
|
|
return;
|
|
case DST_STRUCT:
|
|
open = "{"; close = "}";
|
|
break;
|
|
case DST_TABLE:
|
|
open = "@{"; close = "}";
|
|
break;
|
|
case DST_TUPLE:
|
|
open = "("; close = ")";
|
|
break;
|
|
case DST_ARRAY:
|
|
open = "["; close = "]";
|
|
break;
|
|
}
|
|
if (!p->state) {
|
|
dst_table_init(&p->seen, 10);
|
|
p->state = 1;
|
|
}
|
|
check = dst_table_get(&p->seen, x);
|
|
if (dst_checktype(check, DST_INTEGER)) {
|
|
dst_buffer_push_cstring(p->buffer, "<cycle ");
|
|
integer_to_string_b(p->buffer, dst_unwrap_integer(check));
|
|
dst_buffer_push_cstring(p->buffer, ">");
|
|
return;
|
|
}
|
|
dst_table_put(&p->seen, x, dst_wrap_integer(p->next++));
|
|
dst_buffer_push_cstring(p->buffer, open);
|
|
if (p->depth == 0) {
|
|
dst_buffer_push_cstring(p->buffer, "...");
|
|
} else if (dst_hashtable_view(x, &kvs, &len, &cap)) {
|
|
dst_print_hashtable_inner(p, kvs, len, cap);
|
|
} else if (dst_seq_view(x, &data, &len)) {
|
|
dst_print_seq_inner(p, data, len);
|
|
}
|
|
dst_buffer_push_cstring(p->buffer, close);
|
|
/* Remove from seen as we know that printing completes, we
|
|
* can print in multiple times and we know we are not recursing */
|
|
dst_table_remove(&p->seen, x);
|
|
p->depth++;
|
|
}
|
|
|
|
/* Init printer to defaults */
|
|
static void dst_printer_defaults(DstPrinter *p) {
|
|
p->next = 0;
|
|
p->flags = DST_PRINTFLAG_INDENT;
|
|
p->depth = 10;
|
|
p->indent = 0;
|
|
p->indent_size = 2;
|
|
p->token_line_limit = 5;
|
|
}
|
|
|
|
/* Debug print. Returns a description of an object as a string. */
|
|
const uint8_t *dst_description(Dst x) {
|
|
DstPrinter printer;
|
|
const uint8_t *ret;
|
|
|
|
DstBuffer buffer;
|
|
dst_printer_defaults(&printer);
|
|
printer.state = 0;
|
|
dst_buffer_init(&buffer, 0);
|
|
printer.buffer = &buffer;
|
|
|
|
/* Only print description up to a depth of 4 */
|
|
dst_description_helper(&printer, x);
|
|
ret = dst_string(buffer.data, buffer.count);
|
|
|
|
dst_buffer_deinit(&buffer);
|
|
if (printer.state)
|
|
dst_table_deinit(&printer.seen);
|
|
return ret;
|
|
}
|
|
|
|
/* Convert any value to a dst string. Similar to description, but
|
|
* strings, symbols, and buffers will return their content. */
|
|
const uint8_t *dst_to_string(Dst x) {
|
|
switch (dst_type(x)) {
|
|
default:
|
|
return dst_short_description(x);
|
|
case DST_STRING:
|
|
case DST_SYMBOL:
|
|
return dst_unwrap_string(x);
|
|
}
|
|
}
|
|
|
|
/* Helper function for formatting strings. Useful for generating error messages and the like.
|
|
* Similiar to printf, but specialized for operating with dst. */
|
|
const uint8_t *dst_formatc(const char *format, ...) {
|
|
va_list args;
|
|
int32_t len = 0;
|
|
int32_t i;
|
|
const uint8_t *ret;
|
|
DstPrinter printer;
|
|
DstBuffer buffer;
|
|
DstBuffer *bufp = &buffer;
|
|
printer.state = 0;
|
|
|
|
/* Calculate length */
|
|
while (format[len]) len++;
|
|
|
|
/* Initialize buffer */
|
|
dst_buffer_init(bufp, len);
|
|
printer.buffer = bufp;
|
|
|
|
/* Start args */
|
|
va_start(args, format);
|
|
|
|
/* Iterate length */
|
|
for (i = 0; i < len; i++) {
|
|
uint8_t c = format[i];
|
|
switch (c) {
|
|
default:
|
|
dst_buffer_push_u8(bufp, c);
|
|
break;
|
|
case '%':
|
|
{
|
|
if (i + 1 >= len)
|
|
break;
|
|
switch (format[++i]) {
|
|
default:
|
|
dst_buffer_push_u8(bufp, format[i]);
|
|
break;
|
|
case 'f':
|
|
real_to_string_b(bufp, va_arg(args, double));
|
|
break;
|
|
case 'd':
|
|
integer_to_string_b(bufp, va_arg(args, int32_t));
|
|
break;
|
|
case 'S':
|
|
{
|
|
const uint8_t *str = va_arg(args, const uint8_t *);
|
|
dst_buffer_push_bytes(bufp, str, dst_string_length(str));
|
|
break;
|
|
}
|
|
case 's':
|
|
dst_buffer_push_cstring(bufp, va_arg(args, const char *));
|
|
break;
|
|
case 'c':
|
|
dst_buffer_push_u8(bufp, va_arg(args, long));
|
|
break;
|
|
case 'v':
|
|
{
|
|
dst_printer_defaults(&printer);
|
|
dst_description_helper(&printer, va_arg(args, Dst));
|
|
break;
|
|
}
|
|
case 'C':
|
|
{
|
|
dst_printer_defaults(&printer);
|
|
printer.flags |= DST_PRINTFLAG_COLORIZE;
|
|
dst_description_helper(&printer, va_arg(args, Dst));
|
|
break;
|
|
}
|
|
case 'q':
|
|
{
|
|
const uint8_t *str = va_arg(args, const uint8_t *);
|
|
dst_escape_string_b(bufp, str);
|
|
break;
|
|
}
|
|
case 't':
|
|
{
|
|
dst_buffer_push_cstring(bufp, dst_type_names[va_arg(args, DstType)]);
|
|
break;
|
|
}
|
|
case 'V':
|
|
{
|
|
dst_short_description_b(bufp, va_arg(args, Dst));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
va_end(args);
|
|
|
|
ret = dst_string(buffer.data, buffer.count);
|
|
dst_buffer_deinit(&buffer);
|
|
if (printer.state)
|
|
dst_table_deinit(&printer.seen);
|
|
return ret;
|
|
}
|
|
|
|
/* Print string to stdout */
|
|
void dst_puts(const uint8_t *str) {
|
|
int32_t i;
|
|
int32_t len = dst_string_length(str);
|
|
for (i = 0; i < len; i++) {
|
|
putc(str[i], stdout);
|
|
}
|
|
}
|