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Code Issues 1 Releases Wiki Activity

Move pretty printing to separate file pp.c

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Simplify string.c and remove janet_puts.
This commit is contained in:
Calvin Rose 2019-01-09 11:47:29 -05:00
parent 3ae6f64de5
commit 115ed9cbb9
4 changed files with 554 additions and 555 deletions
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546
src/core/pp.c Normal file
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@ -0,0 +1,546 @@
/*
* Copyright (c) 2019 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 <janet/janet.h>
#include "util.h"
#include "state.h"
/* Implements a pretty printer for Janet. The pretty printer
* is farily simple and not that flexible, but fast. */
/* Temporary buffer size */
#define BUFSIZE 64
static void number_to_string_b(JanetBuffer *buffer, double x) {
janet_buffer_ensure(buffer, buffer->count + BUFSIZE, 2);
int count = snprintf((char *) buffer->data + buffer->count, BUFSIZE, "%g", x);
buffer->count += count;
}
/* expects non positive x */
static int count_dig10(int32_t x) {
int result = 1;
for (;;) {
if (x > -10) return result;
if (x > -100) return result + 1;
if (x > -1000) return result + 2;
if (x > -10000) return result + 3;
x /= 10000;
result += 4;
}
}
static void integer_to_string_b(JanetBuffer *buffer, int32_t x) {
janet_buffer_extra(buffer, BUFSIZE);
uint8_t *buf = buffer->data + buffer->count;
int32_t neg = 0;
int32_t len = 0;
if (x == 0) {
buf[0] = '0';
buffer->count++;
return;
}
if (x > 0) {
x = -x;
} else {
neg = 1;
*buf++ = '-';
}
len = count_dig10(x);
buf += len;
while (x) {
uint8_t digit = (uint8_t) -(x % 10);
*(--buf) = '0' + digit;
x /= 10;
}
buffer->count += len + neg;
}
#define HEX(i) (((uint8_t *) janet_base64)[(i)])
/* Returns a string description for a pointer. Truncates
* title to 32 characters */
static void string_description_b(JanetBuffer *buffer, const char *title, void *pointer) {
janet_buffer_ensure(buffer, buffer->count + BUFSIZE, 2);
uint8_t *c = buffer->data + buffer->count;
int32_t i;
union {
uint8_t bytes[sizeof(void *)];
void *p;
} pbuf;
pbuf.p = pointer;
*c++ = '<';
/* Maximum of 32 bytes for abstract type name */
for (i = 0; title[i] && i < 32; ++i)
*c++ = ((uint8_t *)title) [i];
*c++ = ' ';
*c++ = '0';
*c++ = 'x';
#if defined(JANET_64)
#define POINTSIZE 6
#else
#define POINTSIZE (sizeof(void *))
#endif
for (i = POINTSIZE; i > 0; --i) {
uint8_t byte = pbuf.bytes[i - 1];
*c++ = HEX(byte >> 4);
*c++ = HEX(byte & 0xF);
}
*c++ = '>';
buffer->count = (int32_t)(c - buffer->data);
#undef POINTSIZE
}
#undef HEX
#undef BUFSIZE
static void janet_escape_string_impl(JanetBuffer *buffer, const uint8_t *str, int32_t len) {
janet_buffer_push_u8(buffer, '"');
for (int32_t i = 0; i < len; ++i) {
uint8_t c = str[i];
switch (c) {
case '"':
janet_buffer_push_bytes(buffer, (const uint8_t *)"\\\"", 2);
break;
case '\n':
janet_buffer_push_bytes(buffer, (const uint8_t *)"\\n", 2);
break;
case '\r':
janet_buffer_push_bytes(buffer, (const uint8_t *)"\\r", 2);
break;
case '\0':
janet_buffer_push_bytes(buffer, (const uint8_t *)"\\0", 2);
break;
case '\\':
janet_buffer_push_bytes(buffer, (const uint8_t *)"\\\\", 2);
break;
default:
if (c < 32 || c > 127) {
uint8_t buf[4];
buf[0] = '\\';
buf[1] = 'x';
buf[2] = janet_base64[(c >> 4) & 0xF];
buf[3] = janet_base64[c & 0xF];
janet_buffer_push_bytes(buffer, buf, 4);
} else {
janet_buffer_push_u8(buffer, c);
}
break;
}
}
janet_buffer_push_u8(buffer, '"');
}
static void janet_escape_string_b(JanetBuffer *buffer, const uint8_t *str) {
janet_escape_string_impl(buffer, str, janet_string_length(str));
}
static void janet_escape_buffer_b(JanetBuffer *buffer, JanetBuffer *bx) {
janet_buffer_push_u8(buffer, '@');
janet_escape_string_impl(buffer, bx->data, bx->count);
}
void janet_description_b(JanetBuffer *buffer, Janet x) {
switch (janet_type(x)) {
case JANET_NIL:
janet_buffer_push_cstring(buffer, "nil");
return;
case JANET_TRUE:
janet_buffer_push_cstring(buffer, "true");
return;
case JANET_FALSE:
janet_buffer_push_cstring(buffer, "false");
return;
case JANET_NUMBER:
number_to_string_b(buffer, janet_unwrap_number(x));
return;
case JANET_KEYWORD:
janet_buffer_push_u8(buffer, ':');
/* fallthrough */
case JANET_SYMBOL:
janet_buffer_push_bytes(buffer,
janet_unwrap_string(x),
janet_string_length(janet_unwrap_string(x)));
return;
case JANET_STRING:
janet_escape_string_b(buffer, janet_unwrap_string(x));
return;
case JANET_BUFFER:
janet_escape_buffer_b(buffer, janet_unwrap_buffer(x));
return;
case JANET_ABSTRACT:
{
const char *n = janet_abstract_type(janet_unwrap_abstract(x))->name;
string_description_b(buffer, n, janet_unwrap_abstract(x));
return;
}
case JANET_CFUNCTION:
{
Janet check = janet_table_get(janet_vm_registry, x);
if (janet_checktype(check, JANET_SYMBOL)) {
janet_buffer_push_cstring(buffer, "<cfunction ");
janet_buffer_push_bytes(buffer,
janet_unwrap_symbol(check),
janet_string_length(janet_unwrap_symbol(check)));
janet_buffer_push_u8(buffer, '>');
break;
}
goto fallthrough;
}
case JANET_FUNCTION:
{
JanetFunction *fun = janet_unwrap_function(x);
JanetFuncDef *def = fun->def;
if (def->name) {
const uint8_t *n = def->name;
janet_buffer_push_cstring(buffer, "<function ");
janet_buffer_push_bytes(buffer, n, janet_string_length(n));
janet_buffer_push_u8(buffer, '>');
break;
}
goto fallthrough;
}
fallthrough:
default:
string_description_b(buffer, janet_type_names[janet_type(x)], janet_unwrap_pointer(x));
break;
}
}
void janet_to_string_b(JanetBuffer *buffer, Janet x) {
switch (janet_type(x)) {
default:
janet_description_b(buffer, x);
break;
case JANET_BUFFER:
janet_buffer_push_bytes(buffer,
janet_unwrap_buffer(x)->data,
janet_unwrap_buffer(x)->count);
break;
case JANET_STRING:
case JANET_SYMBOL:
case JANET_KEYWORD:
janet_buffer_push_bytes(buffer,
janet_unwrap_string(x),
janet_string_length(janet_unwrap_string(x)));
break;
}
}
const uint8_t *janet_description(Janet x) {
JanetBuffer b;
janet_buffer_init(&b, 10);
janet_description_b(&b, x);
const uint8_t *ret = janet_string(b.data, b.count);
janet_buffer_deinit(&b);
return ret;
}
/* Convert any value to a janet string. Similar to description, but
* strings, symbols, and buffers will return their content. */
const uint8_t *janet_to_string(Janet x) {
switch (janet_type(x)) {
default:
{
JanetBuffer b;
janet_buffer_init(&b, 10);
janet_to_string_b(&b, x);
const uint8_t *ret = janet_string(b.data, b.count);
janet_buffer_deinit(&b);
return ret;
}
case JANET_BUFFER:
return janet_string(janet_unwrap_buffer(x)->data, janet_unwrap_buffer(x)->count);
case JANET_STRING:
case JANET_SYMBOL:
case JANET_KEYWORD:
return janet_unwrap_string(x);
}
}
/* Hold state for pretty printer. */
struct pretty {
JanetBuffer *buffer;
int depth;
int indent;
JanetTable seen;
};
static void print_newline(struct pretty *S, int just_a_space) {
int i;
if (just_a_space) {
janet_buffer_push_u8(S->buffer, ' ');
return;
}
janet_buffer_push_u8(S->buffer, '\n');
for (i = 0; i < S->indent; i++) {
janet_buffer_push_u8(S->buffer, ' ');
}
}
/* Helper for pretty printing */
static void janet_pretty_one(struct pretty *S, Janet x, int is_dict_value) {
/* Add to seen */
switch (janet_type(x)) {
case JANET_NIL:
case JANET_NUMBER:
case JANET_SYMBOL:
case JANET_TRUE:
case JANET_FALSE:
break;
default:
{
Janet seenid = janet_table_get(&S->seen, x);
if (janet_checktype(seenid, JANET_NUMBER)) {
janet_buffer_push_cstring(S->buffer, "<cycle ");
integer_to_string_b(S->buffer, janet_unwrap_integer(seenid));
janet_buffer_push_u8(S->buffer, '>');
return;
} else {
janet_table_put(&S->seen, x, janet_wrap_integer(S->seen.count));
break;
}
}
}
switch (janet_type(x)) {
default:
janet_description_b(S->buffer, x);
break;
case JANET_ARRAY:
case JANET_TUPLE:
{
int isarray = janet_checktype(x, JANET_ARRAY);
janet_buffer_push_cstring(S->buffer, isarray ? "@[" : "(");
S->depth--;
S->indent += 2;
if (S->depth == 0) {
janet_buffer_push_cstring(S->buffer, "...");
} else {
int32_t i, len;
const Janet *arr;
janet_indexed_view(x, &arr, &len);
if (!isarray && len >= 5)
janet_buffer_push_u8(S->buffer, ' ');
if (is_dict_value && len >= 5) print_newline(S, 0);
for (i = 0; i < len; i++) {
if (i) print_newline(S, len < 5);
janet_pretty_one(S, arr[i], 0);
}
}
S->indent -= 2;
S->depth++;
janet_buffer_push_u8(S->buffer, isarray ? ']' : ')');
break;
}
case JANET_STRUCT:
case JANET_TABLE:
{
int istable = janet_checktype(x, JANET_TABLE);
janet_buffer_push_cstring(S->buffer, istable ? "@" : "{");
/* For object-like tables, print class name */
if (istable) {
JanetTable *t = janet_unwrap_table(x);
JanetTable *proto = t->proto;
if (NULL != proto) {
Janet name = janet_table_get(proto, janet_csymbolv(":name"));
if (janet_checktype(name, JANET_SYMBOL)) {
const uint8_t *sym = janet_unwrap_symbol(name);
janet_buffer_push_bytes(S->buffer, sym, janet_string_length(sym));
}
}
janet_buffer_push_cstring(S->buffer, "{");
}
S->depth--;
S->indent += 2;
if (S->depth == 0) {
janet_buffer_push_cstring(S->buffer, "...");
} else {
int32_t i, len, cap;
int first_kv_pair = 1;
const JanetKV *kvs;
janet_dictionary_view(x, &kvs, &len, &cap);
if (!istable && len >= 4)
janet_buffer_push_u8(S->buffer, ' ');
if (is_dict_value && len >= 5) print_newline(S, 0);
for (i = 0; i < cap; i++) {
if (!janet_checktype(kvs[i].key, JANET_NIL)) {
if (first_kv_pair) {
first_kv_pair = 0;
} else {
print_newline(S, len < 4);
}
janet_pretty_one(S, kvs[i].key, 0);
janet_buffer_push_u8(S->buffer, ' ');
janet_pretty_one(S, kvs[i].value, 1);
}
}
}
S->indent -= 2;
S->depth++;
janet_buffer_push_u8(S->buffer, '}');
break;
}
}
/* Remove from seen */
janet_table_remove(&S->seen, x);
return;
}
/* Helper for printing a janet value in a pretty form. Not meant to be used
* for serialization or anything like that. */
JanetBuffer *janet_pretty(JanetBuffer *buffer, int depth, Janet x) {
struct pretty S;
if (NULL == buffer) {
buffer = janet_buffer(0);
}
S.buffer = buffer;
S.depth = depth;
S.indent = 0;
janet_table_init(&S.seen, 10);
janet_pretty_one(&S, x, 0);
janet_table_deinit(&S.seen);
return S.buffer;
}
static const char *typestr(Janet x) {
JanetType t = janet_type(x);
return (t == JANET_ABSTRACT)
? janet_abstract_type(janet_unwrap_abstract(x))->name
: janet_type_names[t];
}
static void pushtypes(JanetBuffer *buffer, int types) {
int first = 1;
int i = 0;
while (types) {
if (1 & types) {
if (first) {
first = 0;
} else {
janet_buffer_push_u8(buffer, '|');
}
janet_buffer_push_cstring(buffer, janet_type_names[i]);
}
i++;
types >>= 1;
}
}
/* Helper function for formatting strings. Useful for generating error messages and the like.
* Similar to printf, but specialized for operating with janet. */
const uint8_t *janet_formatc(const char *format, ...) {
va_list args;
int32_t len = 0;
int32_t i;
const uint8_t *ret;
JanetBuffer buffer;
JanetBuffer *bufp = &buffer;
/* Calculate length */
while (format[len]) len++;
/* Initialize buffer */
janet_buffer_init(bufp, len);
/* Start args */
va_start(args, format);
/* Iterate length */
for (i = 0; i < len; i++) {
uint8_t c = format[i];
switch (c) {
default:
janet_buffer_push_u8(bufp, c);
break;
case '%':
{
if (i + 1 >= len)
break;
switch (format[++i]) {
default:
janet_buffer_push_u8(bufp, format[i]);
break;
case 'f':
number_to_string_b(bufp, va_arg(args, double));
break;
case 'd':
integer_to_string_b(bufp, va_arg(args, long));
break;
case 'S':
{
const uint8_t *str = va_arg(args, const uint8_t *);
janet_buffer_push_bytes(bufp, str, janet_string_length(str));
break;
}
case 's':
janet_buffer_push_cstring(bufp, va_arg(args, const char *));
break;
case 'c':
janet_buffer_push_u8(bufp, (uint8_t) va_arg(args, long));
break;
case 'q':
{
const uint8_t *str = va_arg(args, const uint8_t *);
janet_escape_string_b(bufp, str);
break;
}
case 't':
{
janet_buffer_push_cstring(bufp, typestr(va_arg(args, Janet)));
break;
}
case 'T':
{
int types = va_arg(args, long);
pushtypes(bufp, types);
break;
}
case 'V':
{
janet_to_string_b(bufp, va_arg(args, Janet));
break;
}
case 'v':
{
janet_description_b(bufp, va_arg(args, Janet));
break;
}
case 'p':
{
janet_pretty(bufp, 4, va_arg(args, Janet));
}
}
}
}
}
va_end(args);
ret = janet_string(buffer.data, buffer.count);
janet_buffer_deinit(&buffer);
return ret;
}

557
src/core/string.c
View File

@ -21,6 +21,7 @@
*/
#include <janet/janet.h>
#include <string.h>
#include "gc.h"
#include "util.h"
#include "state.h"
@ -57,37 +58,21 @@ int janet_string_compare(const uint8_t *lhs, const uint8_t *rhs) {
int32_t xlen = janet_string_length(lhs);
int32_t ylen = janet_string_length(rhs);
int32_t len = xlen > ylen ? ylen : xlen;
int32_t i;
for (i = 0; i < len; ++i) {
if (lhs[i] == rhs[i]) {
continue;
} else if (lhs[i] < rhs[i]) {
return -1; /* x is less than y */
} else {
return 1; /* y is less than x */
}
}
if (xlen == ylen) {
return 0;
} else {
return xlen < ylen ? -1 : 1;
}
int res = memcmp(lhs, rhs, len);
if (res) return res;
if (xlen == ylen) return 0;
return xlen < ylen ? -1 : 1;
}
/* Compare a janet string with a piece of memory */
int janet_string_equalconst(const uint8_t *lhs, const uint8_t *rhs, int32_t rlen, int32_t rhash) {
int32_t index;
int32_t lhash = janet_string_hash(lhs);
int32_t llen = janet_string_length(lhs);
if (lhs == rhs)
return 1;
if (lhash != rhash || llen != rlen)
return 0;
for (index = 0; index < llen; index++) {
if (lhs[index] != rhs[index])
return 0;
}
return 1;
return !memcmp(lhs, rhs, rlen);
}
/* Check if two strings are equal */
@ -98,535 +83,7 @@ int janet_string_equal(const uint8_t *lhs, const uint8_t *rhs) {
/* Load a c string */
const uint8_t *janet_cstring(const char *str) {
int32_t len = 0;
while (str[len]) ++len;
return janet_string((const uint8_t *)str, len);
}
/* Temporary buffer size */
#define BUFSIZE 64
static void number_to_string_b(JanetBuffer *buffer, double x) {
janet_buffer_ensure(buffer, buffer->count + BUFSIZE, 2);
int count = snprintf((char *) buffer->data + buffer->count, BUFSIZE, "%g", x);
buffer->count += count;
}
/* expects non positive x */
static int count_dig10(int32_t x) {
int result = 1;
for (;;) {
if (x > -10) return result;
if (x > -100) return result + 1;
if (x > -1000) return result + 2;
if (x > -10000) return result + 3;
x /= 10000;
result += 4;
}
}
static void integer_to_string_b(JanetBuffer *buffer, int32_t x) {
janet_buffer_extra(buffer, BUFSIZE);
uint8_t *buf = buffer->data + buffer->count;
int32_t neg = 0;
int32_t len = 0;
if (x == 0) {
buf[0] = '0';
buffer->count++;
return;
}
if (x > 0) {
x = -x;
} else {
neg = 1;
*buf++ = '-';
}
len = count_dig10(x);
buf += len;
while (x) {
uint8_t digit = (uint8_t) -(x % 10);
*(--buf) = '0' + digit;
x /= 10;
}
buffer->count += len + neg;
}
#define HEX(i) (((uint8_t *) janet_base64)[(i)])
/* Returns a string description for a pointer. Truncates
* title to 32 characters */
static void string_description_b(JanetBuffer *buffer, const char *title, void *pointer) {
janet_buffer_ensure(buffer, buffer->count + BUFSIZE, 2);
uint8_t *c = buffer->data + buffer->count;
int32_t i;
union {
uint8_t bytes[sizeof(void *)];
void *p;
} pbuf;
pbuf.p = pointer;
*c++ = '<';
/* Maximum of 32 bytes for abstract type name */
for (i = 0; title[i] && i < 32; ++i)
*c++ = ((uint8_t *)title) [i];
*c++ = ' ';
*c++ = '0';
*c++ = 'x';
#if defined(JANET_64)
#define POINTSIZE 6
#else
#define POINTSIZE (sizeof(void *))
#endif
for (i = POINTSIZE; i > 0; --i) {
uint8_t byte = pbuf.bytes[i - 1];
*c++ = HEX(byte >> 4);
*c++ = HEX(byte & 0xF);
}
*c++ = '>';
buffer->count = (int32_t)(c - buffer->data);
#undef POINTSIZE
}
#undef HEX
#undef BUFSIZE
static void janet_escape_string_impl(JanetBuffer *buffer, const uint8_t *str, int32_t len) {
janet_buffer_push_u8(buffer, '"');
for (int32_t i = 0; i < len; ++i) {
uint8_t c = str[i];
switch (c) {
case '"':
janet_buffer_push_bytes(buffer, (const uint8_t *)"\\\"", 2);
break;
case '\n':
janet_buffer_push_bytes(buffer, (const uint8_t *)"\\n", 2);
break;
case '\r':
janet_buffer_push_bytes(buffer, (const uint8_t *)"\\r", 2);
break;
case '\0':
janet_buffer_push_bytes(buffer, (const uint8_t *)"\\0", 2);
break;
case '\\':
janet_buffer_push_bytes(buffer, (const uint8_t *)"\\\\", 2);
break;
default:
if (c < 32 || c > 127) {
uint8_t buf[4];
buf[0] = '\\';
buf[1] = 'x';
buf[2] = janet_base64[(c >> 4) & 0xF];
buf[3] = janet_base64[c & 0xF];
janet_buffer_push_bytes(buffer, buf, 4);
} else {
janet_buffer_push_u8(buffer, c);
}
break;
}
}
janet_buffer_push_u8(buffer, '"');
}
static void janet_escape_string_b(JanetBuffer *buffer, const uint8_t *str) {
janet_escape_string_impl(buffer, str, janet_string_length(str));
}
static void janet_escape_buffer_b(JanetBuffer *buffer, JanetBuffer *bx) {
janet_buffer_push_u8(buffer, '@');
janet_escape_string_impl(buffer, bx->data, bx->count);
}
void janet_description_b(JanetBuffer *buffer, Janet x) {
switch (janet_type(x)) {
case JANET_NIL:
janet_buffer_push_cstring(buffer, "nil");
return;
case JANET_TRUE:
janet_buffer_push_cstring(buffer, "true");
return;
case JANET_FALSE:
janet_buffer_push_cstring(buffer, "false");
return;
case JANET_NUMBER:
number_to_string_b(buffer, janet_unwrap_number(x));
return;
case JANET_KEYWORD:
janet_buffer_push_u8(buffer, ':');
/* fallthrough */
case JANET_SYMBOL:
janet_buffer_push_bytes(buffer,
janet_unwrap_string(x),
janet_string_length(janet_unwrap_string(x)));
return;
case JANET_STRING:
janet_escape_string_b(buffer, janet_unwrap_string(x));
return;
case JANET_BUFFER:
janet_escape_buffer_b(buffer, janet_unwrap_buffer(x));
return;
case JANET_ABSTRACT:
{
const char *n = janet_abstract_type(janet_unwrap_abstract(x))->name;
string_description_b(buffer, n, janet_unwrap_abstract(x));
return;
}
case JANET_CFUNCTION:
{
Janet check = janet_table_get(janet_vm_registry, x);
if (janet_checktype(check, JANET_SYMBOL)) {
janet_buffer_push_cstring(buffer, "<cfunction ");
janet_buffer_push_bytes(buffer,
janet_unwrap_symbol(check),
janet_string_length(janet_unwrap_symbol(check)));
janet_buffer_push_u8(buffer, '>');
break;
}
goto fallthrough;
}
case JANET_FUNCTION:
{
JanetFunction *fun = janet_unwrap_function(x);
JanetFuncDef *def = fun->def;
if (def->name) {
const uint8_t *n = def->name;
janet_buffer_push_cstring(buffer, "<function ");
janet_buffer_push_bytes(buffer, n, janet_string_length(n));
janet_buffer_push_u8(buffer, '>');
break;
}
goto fallthrough;
}
fallthrough:
default:
string_description_b(buffer, janet_type_names[janet_type(x)], janet_unwrap_pointer(x));
break;
}
}
void janet_to_string_b(JanetBuffer *buffer, Janet x) {
switch (janet_type(x)) {
default:
janet_description_b(buffer, x);
break;
case JANET_BUFFER:
janet_buffer_push_bytes(buffer,
janet_unwrap_buffer(x)->data,
janet_unwrap_buffer(x)->count);
break;
case JANET_STRING:
case JANET_SYMBOL:
case JANET_KEYWORD:
janet_buffer_push_bytes(buffer,
janet_unwrap_string(x),
janet_string_length(janet_unwrap_string(x)));
break;
}
}
const uint8_t *janet_description(Janet x) {
JanetBuffer b;
janet_buffer_init(&b, 10);
janet_description_b(&b, x);
const uint8_t *ret = janet_string(b.data, b.count);
janet_buffer_deinit(&b);
return ret;
}
/* Convert any value to a janet string. Similar to description, but
* strings, symbols, and buffers will return their content. */
const uint8_t *janet_to_string(Janet x) {
switch (janet_type(x)) {
default:
{
JanetBuffer b;
janet_buffer_init(&b, 10);
janet_to_string_b(&b, x);
const uint8_t *ret = janet_string(b.data, b.count);
janet_buffer_deinit(&b);
return ret;
}
case JANET_BUFFER:
return janet_string(janet_unwrap_buffer(x)->data, janet_unwrap_buffer(x)->count);
case JANET_STRING:
case JANET_SYMBOL:
case JANET_KEYWORD:
return janet_unwrap_string(x);
}
}
/* Hold state for pretty printer. */
struct pretty {
JanetBuffer *buffer;
int depth;
int indent;
JanetTable seen;
};
static void print_newline(struct pretty *S, int just_a_space) {
int i;
if (just_a_space) {
janet_buffer_push_u8(S->buffer, ' ');
return;
}
janet_buffer_push_u8(S->buffer, '\n');
for (i = 0; i < S->indent; i++) {
janet_buffer_push_u8(S->buffer, ' ');
}
}
/* Helper for pretty printing */
static void janet_pretty_one(struct pretty *S, Janet x, int is_dict_value) {
/* Add to seen */
switch (janet_type(x)) {
case JANET_NIL:
case JANET_NUMBER:
case JANET_SYMBOL:
case JANET_TRUE:
case JANET_FALSE:
break;
default:
{
Janet seenid = janet_table_get(&S->seen, x);
if (janet_checktype(seenid, JANET_NUMBER)) {
janet_buffer_push_cstring(S->buffer, "<cycle ");
integer_to_string_b(S->buffer, janet_unwrap_integer(seenid));
janet_buffer_push_u8(S->buffer, '>');
return;
} else {
janet_table_put(&S->seen, x, janet_wrap_integer(S->seen.count));
break;
}
}
}
switch (janet_type(x)) {
default:
janet_description_b(S->buffer, x);
break;
case JANET_ARRAY:
case JANET_TUPLE:
{
int isarray = janet_checktype(x, JANET_ARRAY);
janet_buffer_push_cstring(S->buffer, isarray ? "@[" : "(");
S->depth--;
S->indent += 2;
if (S->depth == 0) {
janet_buffer_push_cstring(S->buffer, "...");
} else {
int32_t i, len;
const Janet *arr;
janet_indexed_view(x, &arr, &len);
if (!isarray && len >= 5)
janet_buffer_push_u8(S->buffer, ' ');
if (is_dict_value && len >= 5) print_newline(S, 0);
for (i = 0; i < len; i++) {
if (i) print_newline(S, len < 5);
janet_pretty_one(S, arr[i], 0);
}
}
S->indent -= 2;
S->depth++;
janet_buffer_push_u8(S->buffer, isarray ? ']' : ')');
break;
}
case JANET_STRUCT:
case JANET_TABLE:
{
int istable = janet_checktype(x, JANET_TABLE);
janet_buffer_push_cstring(S->buffer, istable ? "@" : "{");
/* For object-like tables, print class name */
if (istable) {
JanetTable *t = janet_unwrap_table(x);
JanetTable *proto = t->proto;
if (NULL != proto) {
Janet name = janet_table_get(proto, janet_csymbolv(":name"));
if (janet_checktype(name, JANET_SYMBOL)) {
const uint8_t *sym = janet_unwrap_symbol(name);
janet_buffer_push_bytes(S->buffer, sym, janet_string_length(sym));
}
}
janet_buffer_push_cstring(S->buffer, "{");
}
S->depth--;
S->indent += 2;
if (S->depth == 0) {
janet_buffer_push_cstring(S->buffer, "...");
} else {
int32_t i, len, cap;
int first_kv_pair = 1;
const JanetKV *kvs;
janet_dictionary_view(x, &kvs, &len, &cap);
if (!istable && len >= 4)
janet_buffer_push_u8(S->buffer, ' ');
if (is_dict_value && len >= 5) print_newline(S, 0);
for (i = 0; i < cap; i++) {
if (!janet_checktype(kvs[i].key, JANET_NIL)) {
if (first_kv_pair) {
first_kv_pair = 0;
} else {
print_newline(S, len < 4);
}
janet_pretty_one(S, kvs[i].key, 0);
janet_buffer_push_u8(S->buffer, ' ');
janet_pretty_one(S, kvs[i].value, 1);
}
}
}
S->indent -= 2;
S->depth++;
janet_buffer_push_u8(S->buffer, '}');
break;
}
}
/* Remove from seen */
janet_table_remove(&S->seen, x);
return;
}
/* Helper for printing a janet value in a pretty form. Not meant to be used
* for serialization or anything like that. */
JanetBuffer *janet_pretty(JanetBuffer *buffer, int depth, Janet x) {
struct pretty S;
if (NULL == buffer) {
buffer = janet_buffer(0);
}
S.buffer = buffer;
S.depth = depth;
S.indent = 0;
janet_table_init(&S.seen, 10);
janet_pretty_one(&S, x, 0);
janet_table_deinit(&S.seen);
return S.buffer;
}
static const char *typestr(Janet x) {
JanetType t = janet_type(x);
return (t == JANET_ABSTRACT)
? janet_abstract_type(janet_unwrap_abstract(x))->name
: janet_type_names[t];
}
static void pushtypes(JanetBuffer *buffer, int types) {
int first = 1;
int i = 0;
while (types) {
if (1 & types) {
if (first) {
first = 0;
} else {
janet_buffer_push_u8(buffer, '|');
}
janet_buffer_push_cstring(buffer, janet_type_names[i]);
}
i++;
types >>= 1;
}
}
/* Helper function for formatting strings. Useful for generating error messages and the like.
* Similar to printf, but specialized for operating with janet. */
const uint8_t *janet_formatc(const char *format, ...) {
va_list args;
int32_t len = 0;
int32_t i;
const uint8_t *ret;
JanetBuffer buffer;
JanetBuffer *bufp = &buffer;
/* Calculate length */
while (format[len]) len++;
/* Initialize buffer */
janet_buffer_init(bufp, len);
/* Start args */
va_start(args, format);
/* Iterate length */
for (i = 0; i < len; i++) {
uint8_t c = format[i];
switch (c) {
default:
janet_buffer_push_u8(bufp, c);
break;
case '%':
{
if (i + 1 >= len)
break;
switch (format[++i]) {
default:
janet_buffer_push_u8(bufp, format[i]);
break;
case 'f':
number_to_string_b(bufp, va_arg(args, double));
break;
case 'd':
integer_to_string_b(bufp, va_arg(args, long));
break;
case 'S':
{
const uint8_t *str = va_arg(args, const uint8_t *);
janet_buffer_push_bytes(bufp, str, janet_string_length(str));
break;
}
case 's':
janet_buffer_push_cstring(bufp, va_arg(args, const char *));
break;
case 'c':
janet_buffer_push_u8(bufp, (uint8_t) va_arg(args, long));
break;
case 'q':
{
const uint8_t *str = va_arg(args, const uint8_t *);
janet_escape_string_b(bufp, str);
break;
}
case 't':
{
janet_buffer_push_cstring(bufp, typestr(va_arg(args, Janet)));
break;
}
case 'T':
{
int types = va_arg(args, long);
pushtypes(bufp, types);
break;
}
case 'V':
{
janet_to_string_b(bufp, va_arg(args, Janet));
break;
}
case 'v':
{
janet_description_b(bufp, va_arg(args, Janet));
break;
}
case 'p':
{
janet_pretty(bufp, 4, va_arg(args, Janet));
}
}
}
}
}
va_end(args);
ret = janet_string(buffer.data, buffer.count);
janet_buffer_deinit(&buffer);
return ret;
}
/* Print string to stdout */
void janet_puts(const uint8_t *str) {
int32_t i;
int32_t len = janet_string_length(str);
for (i = 0; i < len; i++) {
putc(str[i], stdout);
}
return janet_string((const uint8_t *)str, strlen(str));
}
/* Knuth Morris Pratt Algorithm */

4
src/include/janet/janet.h
View File

@ -154,9 +154,6 @@ extern "C" {
#define JANET_OUT_OF_MEMORY do { printf("janet out of memory\n"); exit(1); } while (0)
#endif
/* Helper for debugging */
#define janet_trace(x) janet_puts(janet_formatc("JANET TRACE %s, %d: %v\n", __FILE__, __LINE__, x))
/* Prevent some recursive functions from recursing too deeply
* ands crashing (the parser). Instead, error out. */
#define JANET_RECURSION_GUARD 1024
@ -1002,7 +999,6 @@ JANET_API void janet_description_b(JanetBuffer *buffer, Janet x);
#define janet_cstringv(cstr) janet_wrap_string(janet_cstring(cstr))
#define janet_stringv(str, len) janet_wrap_string(janet_string((str), (len)))
JANET_API const uint8_t *janet_formatc(const char *format, ...);
JANET_API void janet_puts(const uint8_t *str);
/* Symbol functions */
JANET_API const uint8_t *janet_symbol(const uint8_t *str, int32_t len);

2
tools/cook.janet
View File

@ -105,7 +105,7 @@
(if (older-than dest src)
(if is-win
(shell cc " " ;defines " /nologo /c " cflags " /Fo" dest " " src)
(shell cc " " ;defines " " cflags " -o " dest " -c " src))))
(shell cc " -c " src " " ;defines " " cflags " -o " dest))))
(defn- link-c
"Link a number of object files together."