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Add "asoft_compact" which tries to compact applesoft BASIC programs

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currently only drops "LET" and converts "THEN GOTO" to "THEN"
This commit is contained in:
Vince Weaver 2012-05-18 17:27:33 -04:00
parent e5ea444c99
commit c584e529b3
2 changed files with 414 additions and 2 deletions
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10
Makefile
View File

@ -4,9 +4,14 @@ LFLAGS =
all: dos33 asoft_detoken mkdos33fs make_b tokenize_asoft \
dos33_text2ascii integer_detoken char2hex pcx2hgr \
asoft_presenter shape_table
asoft_presenter shape_table asoft_compact
asoft_compact: asoft_compact.o
$(CC) $(LFLAGS) -o asoft_compact asoft_compact.o
asoft_compact.o: asoft_compact.c
$(CC) $(CFLAGS) -c asoft_compact.c
asoft_detoken: asoft_detoken.o
$(CC) $(LFLAGS) -o asoft_detoken asoft_detoken.o
@ -82,7 +87,8 @@ install:
clean:
rm -f *~ *.o asoft_detoken dos33 make_b mkdos33fs \
tokenize_asoft dos33_text2ascii integer_detoken \
char2hex pcx2hgr asoft_presenter shape_table
char2hex pcx2hgr asoft_presenter shape_table \
asoft_compact
cd tests && make clean
cd presenter_demo && make clean

406
asoft_compact.c Normal file
View File

@ -0,0 +1,406 @@
/* asoft_compact */
/* make applesoft code as compact as possible */
/* + Renumber lines to be as short as possible */
/* + Remove extraneous "LET" commands */
/* + Transform "THEN GOTO" to "THEN" */
/* + Make variables as short as possible */
/* + Remove REM statements */
/* + Combine lines right up to 255 char limit */
/* Example */
/* demo.bas = 22,219 bytes */
/* tokenized = 17,407 bytes */
/* compacted = */
#include <stdio.h>
#include <string.h> /* strlen() */
#include <stdlib.h>
#include "version.h"
#define LOW(_x) ((_x)&0xff)
#define HIGH(_x) (((_x)>>8)&0xff)
/* Starting at 0x80 */
char applesoft_tokens[][8]={
/* 80 */ "END","FOR","NEXT","DATA","INPUT","DEL","DIM","READ",
/* 88 */ "GR","TEXT","PR #","IN #","CALL","PLOT","HLIN","VLIN",
/* 90 */ "HGR2","HGR","HCOLOR=","HPLOT","DRAW","XDRAW","HTAB","HOME",
/* 98 */ "ROT=","SCALE=","SHLOAD","TRACE","NOTRACE","NORMAL","INVERSE","FLASH",
/* A0 */ "COLOR=","POP","VTAB ","HIMEM:","LOMEM:","ONERR","RESUME","RECALL",
/* A8 */ "STORE","SPEED=","LET","GOTO","RUN","IF","RESTORE","&",
/* B0 */ "GOSUB","RETURN","REM","STOP","ON","WAIT","LOAD","SAVE",
/* B8 */ "DEF FN","POKE","PRINT","CONT","LIST","CLEAR","GET","NEW",
/* C0 */ "TAB","TO","FN","SPC(","THEN","AT","NOT","STEP",
/* C8 */ "+","-","*","/","^","AND","OR",">",
/* D0 */ "=","<","SGN","INT","ABS","USR","FRE","SCRN (",
/* D8 */ "PDL","POS","SQR","RND","LOG","EXP","COS","SIN",
/* E0 */ "TAN","ATN","PEEK","LEN","STR$","VAL","ASC","CHR$",
/* E8 */ "LEFT$","RIGHT$","MID$","","","","","",
/* F0 */ "","","","","","","","",
/* F8 */ "","","","","","(","(","("
};
#define TOKEN_END 0
#define TOKEN_FOR 1
#define TOKEN_NEXT 2
#define TOKEN_DATA 3
#define TOKEN_INPUT 4
#define TOKEN_DEL 5
#define TOKEN_DIM 6
#define TOKEN_READ 7
#define TOKEN_GR 8
#define TOKEN_TEXT 9
#define TOKEN_PR 10
#define TOKEN_IN 11
#define TOKEN_CALL 12
#define TOKEN_PLOT 13
#define TOKEN_HLIN 14
#define TOKEN_VLIN 15
#define TOKEN_HGR2 16
#define TOKEN_HGR 17
#define TOKEN_HCOLOR 18
#define TOKEN_HPLOT 19
#define TOKEN_DRAW 20
#define TOKEN_XDRAW 21
#define TOKEN_HTAB 22
#define TOKEN_HOME 23
#define TOKEN_ROT 24
#define TOKEN_SCALE 25
#define TOKEN_SHLOAD 26
#define TOKEN_TRACE 27
#define TOKEN_NOTRACE 28
#define TOKEN_NORMAL 29
#define TOKEN_INVERSE 30
#define TOKEN_FLASH 31
#define TOKEN_COLOR 32
#define TOKEN_POP 33
#define TOKEN_VTAB 34
#define TOKEN_HIMEM 35
#define TOKEN_LOMEM 36
#define TOKEN_ONERR 37
#define TOKEN_RESUME 38
#define TOKEN_RECALL 39
#define TOKEN_STORE 40
#define TOKEN_SPEED 41
#define TOKEN_LET 42
#define TOKEN_GOTO 43
#define TOKEN_RUN 44
#define TOKEN_IF 45
#define TOKEN_RESTORE 46
#define TOKEN_AMP 47
#define TOKEN_GOSUB 48
#define TOKEN_RETURN 49
#define TOKEN_REM 50
#define TOKEN_STOP 51
#define TOKEN_ON 52
#define TOKEN_WAIT 53
#define TOKEN_LOAD 54
#define TOKEN_SAVE 55
#define TOKEN_DEFFN 56
#define TOKEN_POKE 57
#define TOKEN_PRINT 58
#define TOKEN_CONT 59
#define TOKEN_LIST 60
#define TOKEN_CLEAR 61
#define TOKEN_GET 62
#define TOKEN_NEW 63
#define TOKEN_TAB 64
#define TOKEN_TO 65
#define TOKEN_FN 66
#define TOKEN_SPC 67
#define TOKEN_THEN 68
#define TOKEN_AT 69
#define TOKEN_NO 70
#define TOKEN_STEP 71
#if 0
/* C8 */ "+","-","*","/","^","AND","OR",">",
/* D0 */ "=","<","SGN","INT","ABS","USR","FRE","SCRN (",
/* D8 */ "PDL","POS","SQR","RND","LOG","EXP","COS","SIN",
/* E0 */ "TAN","ATN","PEEK","LEN","STR$","VAL","ASC","CHR$",
/* E8 */ "LEFT$","RIGHT$","MID$","","","","","",
#endif
static void color_red(void) {
fprintf(stderr,"%c[1;31;40m",27);
}
static void color_green(void) {
fprintf(stderr,"%c[1;32;40m",27);
}
static void color_cyan(void) {
fprintf(stderr,"%c[1;36;40m",27);
}
static void color_yellow(void) {
fprintf(stderr,"%c[1;33;40m",27);
}
static void color_normal(void) {
fprintf(stderr,"%c[0m",27);
}
static int linenums[65536]; /* lazy */
static int output[65536];
static void print_int(int value, int *offset) {
unsigned char buffer[16];
int pointer=15;
int r,q;
q=value;
while(1) {
r=q%10;
q/=10;
buffer[pointer]=r+'0';
if (q==0) break;
pointer--;
}
while(pointer<16) {
output[*offset]=buffer[pointer];
pointer++;
(*offset)++;
}
}
int main(int argc, char **argv) {
int ch1;
int size1,size2;
int line1,line2;
int link1,link2,link;
int debug=1;
int token,last_token=0;
int line_no=0;
int i;
FILE *fff;
int offset,link_offset,line_offset;
if (argc<2) {
fprintf(stderr,"Usage: %s FILENAME -1 -2 -3 -4\n",argv[0]);
exit(1);
}
fff=fopen(argv[1],"r");
if (fff==NULL) {
fprintf(stderr,"Error opening %s\n",argv[1]);
exit(1);
}
/* read size, first two bytes */
size1=fgetc(fff);
size2=fgetc(fff);
if (debug) fprintf(stderr,"File size: %x %x\n",size1,size2);
while(!feof(fff)) {
/* link points to the next line */
link1=fgetc(fff);
link2=fgetc(fff);
link=(link1<<8)|link2;
/* link==0 indicates EOF */
if (link==0) goto the_end;
/* line number is little endian 16-bit value */
line1=fgetc(fff);
line2=fgetc(fff);
if (feof(fff)) goto the_end;
color_red();
fprintf(stderr,"%4d ",((line2)<<8)+line1);
color_normal();
/* repeat until EOL character (0) */
while(1) {
ch1=fgetc(fff);
after_read:
if (ch1==0) break;
/* if > 0x80 it's a token */
if (ch1>=0x80) {
color_green();
fprintf(stderr,"%s",applesoft_tokens[ch1-0x80]);
color_normal();
last_token=ch1&0x7f;
}
/* otherwise it is an ascii char */
else {
if (ch1<0x20) {
color_cyan();
fprintf(stderr,"%d",ch1);
color_normal();
}
if ((ch1>='0') && (ch1<='9')) {
if ((last_token==TOKEN_GOTO) ||
(last_token==TOKEN_GOSUB) ||
(last_token==TOKEN_THEN)) {
line_no=ch1-'0';
while(1) {
ch1=fgetc(fff);
if ((ch1<'0') || (ch1>'9')) break;
line_no*=10;
line_no+=(ch1-'0');
}
color_yellow();
fprintf(stderr,"%d",line_no);
color_normal();
linenums[line_no]++;
goto after_read;
}
}
fputc(ch1,stderr);
}
}
fprintf(stderr,"\n");
}
the_end:;
fprintf(stderr,"Used Line Numbers:\n");
for(i=0;i<65536;i++) {
if(linenums[i]) fprintf(stderr,"\t%d\t%d\n",i,linenums[i]);
}
rewind(fff);
/*********************/
/* Create new output */
/*********************/
/* skip size bytes */
offset=2;
size1=fgetc(fff);
size2=fgetc(fff);
while(!feof(fff)) {
link_offset=offset;
link1=fgetc(fff);
link2=fgetc(fff);
link=(link1<<8)|link2;
output[offset]=link1;
output[offset+1]=link2;
/* link==0 indicates end */
if (link==0) break;
offset+=2;
/* line number is little endian 16-bit value */
line_offset=offset;
line1=fgetc(fff);
line2=fgetc(fff);
output[offset]=line1;
output[offset+1]=line2;
offset+=2;
if (feof(fff)) break;
/* repeat until EOL character (0) */
while(1) {
ch1=fgetc(fff);
after_read2:
if (ch1==0) break;
/* if > 0x80 it's a token */
if (ch1>=0x80) {
token=ch1&0x7f;
if (token==TOKEN_LET) {
/* Skip superfluous LET */
}
else if ((token==TOKEN_GOTO) && (last_token==TOKEN_THEN)) {
/* Skip superfluous GOTO if THEN GOTO */
}
else {
output[offset]=ch1;
offset++;
}
last_token=token;
}
/* otherwise it is an ascii char */
else {
if ((ch1>='0') && (ch1<='9')) {
if ((last_token==TOKEN_GOTO) ||
(last_token==TOKEN_GOSUB) ||
(last_token==TOKEN_THEN)) {
line_no=ch1-'0';
while(1) {
ch1=fgetc(fff);
if ((ch1<'0') || (ch1>'9')) break;
line_no*=10;
line_no+=(ch1-'0');
}
print_int(line_no,&offset);
goto after_read2;
}
}
output[offset]=ch1;
offset++;
}
}
output[offset]=0;
offset++;
output[link_offset]=LOW(offset+0x7ff);
output[link_offset+1]=HIGH(offset+0x7ff);
}
/* write out our program */
/* set last link field to $00 $00 which indicates EOF */
output[offset]='\0';
output[offset+1]='\0';
offset+=2;
/* Set filesize */
/* -1 to match observed values */
output[0]=LOW(offset-1);
output[1]=HIGH(offset-1);
/* output our file */
for(i=0;i<offset;i++) putchar(output[i]);
return 0;
}