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Moved legacy code into archive, ready for a new rapid(?) prototype.

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I may regret doing this!
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Simon Brooke 2026-03-24 16:25:09 +00:00
parent 09051a3e63
commit 914c35ead0
114 changed files with 165 additions and 1 deletions
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src/c/io/print.c
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@ -1,356 +0,0 @@
/*
* print.c
*
* First pass at a printer, for bootstrapping.
*
* (c) 2017 Simon Brooke <simon@journeyman.cc>
* Licensed under GPL version 2.0, or, at your option, any later version.
*/
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/*
* wide characters
*/
#include <wchar.h>
#include <wctype.h>
#include "arith/integer.h"
#include "debug.h"
#include "io/io.h"
#include "io/print.h"
#include "memory/conspage.h"
#include "memory/consspaceobject.h"
#include "memory/hashmap.h"
#include "memory/stack.h"
#include "memory/vectorspace.h"
#include "ops/intern.h"
#include "time/psse_time.h"
/**
* print all the characters in the symbol or string indicated by `pointer`
* onto this `output`; if `pointer` does not indicate a string or symbol,
* don't print anything but just return.
*/
void print_string_contents( URL_FILE *output, struct cons_pointer pointer ) {
while ( stringp( pointer ) || symbolp( pointer ) || keywordp( pointer ) ) {
struct cons_space_object *cell = &pointer2cell( pointer );
wchar_t c = cell->payload.string.character;
if ( c != '\0' ) {
url_fputwc( c, output );
}
pointer = cell->payload.string.cdr;
}
}
/**
* print all the characters in the string indicated by `pointer` onto
* the stream at this `output`, prepending and appending double quote
* characters.
*/
void print_string( URL_FILE *output, struct cons_pointer pointer ) {
url_fputwc( btowc( '"' ), output );
print_string_contents( output, pointer );
url_fputwc( btowc( '"' ), output );
}
/**
* Print a single list cell (cons cell) indicated by `pointer` to the
* stream indicated by `output`. if `initial_space` is `true`, prepend
* a space character.
*/
void
print_list_contents( URL_FILE *output, struct cons_pointer pointer,
bool initial_space ) {
struct cons_space_object *cell = &pointer2cell( pointer );
switch ( cell->tag.value ) {
case CONSTV:
if ( initial_space ) {
url_fputwc( btowc( ' ' ), output );
}
print( output, cell->payload.cons.car );
print_list_contents( output, cell->payload.cons.cdr, true );
break;
case NILTV:
break;
default:
url_fwprintf( output, L" . " );
print( output, pointer );
}
}
void print_list( URL_FILE *output, struct cons_pointer pointer ) {
url_fputws( L"(", output );
print_list_contents( output, pointer, false );
url_fputws( L")", output );
}
void print_map( URL_FILE *output, struct cons_pointer map ) {
if ( hashmapp( map ) ) {
struct vector_space_object *vso = pointer_to_vso( map );
url_fputwc( btowc( '{' ), output );
for ( struct cons_pointer ks = hashmap_keys( map ); !nilp( ks );
ks = c_cdr( ks ) ) {
struct cons_pointer key = c_car( ks );
print( output, key );
url_fputwc( btowc( ' ' ), output );
print( output, hashmap_get( map, key, false ) );
if ( !nilp( c_cdr( ks ) ) ) {
url_fputws( L", ", output );
}
}
url_fputwc( btowc( '}' ), output );
}
}
void print_vso( URL_FILE *output, struct cons_pointer pointer ) {
struct vector_space_object *vso = pointer_to_vso( pointer );
switch ( vso->header.tag.value ) {
case HASHTV:
print_map( output, pointer );
break;
case STACKFRAMETV:
dump_stack_trace( output, pointer );
break;
// \todo: others.
default:
fwprintf( stderr, L"Unrecognised vector-space type '%d'\n",
vso->header.tag.value );
}
}
/**
* stolen from https://stackoverflow.com/questions/11656241/how-to-print-uint128-t-number-using-gcc
*/
void print_128bit( URL_FILE *output, __int128_t n ) {
if ( n == 0 ) {
fwprintf( stderr, L"0" );
} else {
char str[40] = { 0 }; // log10(1 << 128) + '\0'
char *s = str + sizeof( str ) - 1; // start at the end
while ( n != 0 ) {
if ( s == str )
return; // never happens
*--s = "0123456789"[n % 10]; // save last digit
n /= 10; // drop it
}
url_fwprintf( output, L"%s", s );
}
}
/**
* Print the cons-space object indicated by `pointer` to the stream indicated
* by `output`.
*/
struct cons_pointer print( URL_FILE *output, struct cons_pointer pointer ) {
struct cons_space_object cell = pointer2cell( pointer );
char *buffer;
/*
* Because tags have values as well as bytes, this if ... else if
* statement can ultimately be replaced by a switch, which will be neater.
*/
switch ( cell.tag.value ) {
case CONSTV:
print_list( output, pointer );
break;
case EXCEPTIONTV:
url_fputws( L"\nException: ", output );
dump_stack_trace( output, pointer );
break;
case FUNCTIONTV:
url_fputws( L"<Function: ", output );
print( output, cell.payload.function.meta );
url_fputwc( L'>', output );
break;
case INTEGERTV:
struct cons_pointer s = integer_to_string( pointer, 10 );
print_string_contents( output, s );
dec_ref( s );
break;
case KEYTV:
url_fputws( L":", output );
print_string_contents( output, pointer );
break;
case LAMBDATV:{
url_fputws( L"<Anonymous Function: ", output );
struct cons_pointer to_print =
make_cons( c_string_to_lisp_symbol( L"\u03bb" ),
make_cons( cell.payload.lambda.args,
cell.payload.lambda.body ) );
print( output, to_print );
dec_ref( to_print );
url_fputwc( L'>', output );
}
break;
case NILTV:
url_fwprintf( output, L"nil" );
break;
case NLAMBDATV:{
url_fputws( L"<Anonymous Special Form: ", output );
struct cons_pointer to_print =
make_cons( c_string_to_lisp_symbol( L"n\u03bb" ),
make_cons( cell.payload.lambda.args,
cell.payload.lambda.body ) );
print( output, to_print );
dec_ref( to_print );
url_fputwc( L'>', output );
}
break;
case RATIOTV:
print( output, cell.payload.ratio.dividend );
url_fputws( L"/", output );
print( output, cell.payload.ratio.divisor );
break;
case READTV:
url_fwprintf( output, L"<Input stream: " );
print( output, cell.payload.stream.meta );
url_fputwc( L'>', output );
break;
case REALTV:
/* \todo using the C heap is a bad plan because it will fragment.
* As soon as I have working vector space I'll use a special purpose
* vector space object */
buffer = ( char * ) malloc( 24 );
memset( buffer, 0, 24 );
/* format it really long, then clear the trailing zeros */
sprintf( buffer, "%-.23Lg", cell.payload.real.value );
if ( strchr( buffer, '.' ) != NULL ) {
for ( int i = strlen( buffer ) - 1; buffer[i] == '0'; i-- ) {
buffer[i] = '\0';
}
}
url_fwprintf( output, L"%s", buffer );
free( buffer );
break;
case STRINGTV:
print_string( output, pointer );
break;
case SYMBOLTV:
print_string_contents( output, pointer );
break;
case SPECIALTV:
url_fwprintf( output, L"<Special form: " );
print( output, cell.payload.special.meta );
url_fputwc( L'>', output );
break;
case TIMETV:
url_fwprintf( output, L"<Time: " );
print_string( output, time_to_string( pointer ) );
url_fputws( L"; ", output );
print_128bit( output, cell.payload.time.value );
url_fputwc( L'>', output );
break;
case TRUETV:
url_fwprintf( output, L"t" );
break;
case VECTORPOINTTV:
print_vso( output, pointer );
break;
case WRITETV:
url_fwprintf( output, L"<Output stream: " );
print( output, cell.payload.stream.meta );
url_fputwc( L'>', output );
break;
default:
fwprintf( stderr,
L"Error: Unrecognised tag value %d (%4.4s)\n",
cell.tag.value, &cell.tag.bytes[0] );
// dump_object( stderr, pointer);
break;
}
return pointer;
}
/**
* Function; print one complete lisp expression and return NIL. If write-stream is specified and
* is a write stream, then print to that stream, else the stream which is the value of
* `*out*` in the environment.
*
* * (print expr)
* * (print expr write-stream)
*
* @param frame my stack_frame.
* @param frame_pointer a pointer to my stack_frame.
* @param env my environment (from which the stream may be extracted).
* @return NIL.
*/
struct cons_pointer
lisp_print( struct stack_frame *frame, struct cons_pointer frame_pointer,
struct cons_pointer env ) {
debug_print( L"Entering print\n", DEBUG_IO );
struct cons_pointer result = NIL;
URL_FILE *output;
struct cons_pointer out_stream = writep( frame->arg[1] ) ?
frame->arg[1] : get_default_stream( false, env );
if ( writep( out_stream ) ) {
debug_print( L"lisp_print: setting output stream\n", DEBUG_IO );
debug_dump_object( out_stream, DEBUG_IO );
output = pointer2cell( out_stream ).payload.stream.stream;
inc_ref( out_stream );
} else {
output = file_to_url_file( stderr );
}
debug_print( L"lisp_print: about to print\n", DEBUG_IO );
debug_dump_object( frame->arg[0], DEBUG_IO );
result = print( output, frame->arg[0] );
debug_print( L"lisp_print returning\n", DEBUG_IO );
debug_dump_object( result, DEBUG_IO );
if ( writep( out_stream ) ) {
dec_ref( out_stream );
} else {
free( output );
}
return result;
}
void println( URL_FILE *output ) {
url_fputws( L"\n", output );
}
/**
* @brief `(prinln out-stream)`: Print a new line character to `out-stream`, if
* it is specified and is an output stream, else to `*out*`.
*
* @param frame
* @param frame_pointer
* @param env
* @return `nil`
*/
struct cons_pointer
lisp_println( struct stack_frame *frame, struct cons_pointer frame_pointer,
struct cons_pointer env ) {
URL_FILE *output;
struct cons_pointer out_stream = writep( frame->arg[1] ) ?
frame->arg[1] : get_default_stream( false, env );
if ( writep( out_stream ) ) {
output = pointer2cell( out_stream ).payload.stream.stream;
println( output );
}
return NIL;
}