From daf7dfedf0593b562c5fb3e8a023ef6c3924bb86 Mon Sep 17 00:00:00 2001
From: tomsmeding <tom.smeding@gmail.com>
Date: Sat, 13 Aug 2016 16:30:14 +0200
Subject: Read source before compiling

---
 bfcomp.c | 49 +++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 39 insertions(+), 10 deletions(-)

diff --git a/bfcomp.c b/bfcomp.c
index 2e25202..95a43f3 100644
--- a/bfcomp.c
+++ b/bfcomp.c
@@ -160,15 +160,14 @@ void writeprologue(FILE *asmf){
 		params.memsize);
 }
 
-void writeprogram(FILE *srcf,FILE *asmf){
+void writeprogram(char *source,FILE *asmf){
 	int addc=0,shiftc=0;
 	//int lastshiftc=0;
 	struct stackitem {int id; struct stackitem *next;} *loopstack=NULL;
-	bool eof=false;
-	while(!eof){
-		char c=fgetc(srcf);
-		if(feof(srcf))eof=1;
-		if(!eof&&strchr("+-><[].,",c)==NULL)continue;
+	int i=0;
+	do {
+		char c=source[i];
+		if(c&&strchr("+-><[].,",c)==NULL)continue;
 		if(addc&&c!='+'&&c!='-'){
 			addc=(addc%256)+256%256;
 			if(addc==1)fprintf(asmf,"\tinc byte [rbx]  ; 1 +\n");
@@ -198,6 +197,7 @@ void writeprogram(FILE *srcf,FILE *asmf){
 			case '-': addc--; break;
 			case '>': shiftc++; break;
 			case '<': shiftc--; break;
+
 			case '[':{
 				struct stackitem *ls=malloc(sizeof(struct stackitem));
 				assert(ls);
@@ -212,6 +212,7 @@ void writeprogram(FILE *srcf,FILE *asmf){
 					ls->id,ls->id,ls->id);
 				break;
 			}
+
 			case ']':{
 				assert(loopstack);
 				fprintf(asmf,
@@ -224,21 +225,24 @@ void writeprogram(FILE *srcf,FILE *asmf){
 				loopstack=ls;
 				break;
 			}
+
 			case '.':
 				fprintf(asmf,
 					"\tmov edi, 0  ; .\n"
 					"\tmov dil, byte [rbx]\n"
 					"\tcall _putchar\n");
 				break;
+
 			case ',':
 				fprintf(asmf,
 					"\tcall _getchar  ; ,\n"
 					"\tmov byte [rbx], al\n");
 				break;
+
 			default:
-				if(!eof)assert(false);
+				if(c)assert(false);
 		}
-	}
+	} while(source[i++]);
 	assert(!loopstack);
 }
 
@@ -289,22 +293,47 @@ void writeepilogue(FILE *asmf){
 		"buf: resq 1\n");
 }
 
+void readsource(FILE *f,char **sourcep){
+	int sz=1024;
+	char *source=malloc(sz);
+	assert(source);
+	int i=0;
+	while(true){
+		if(i==sz-1){
+			sz*=2;
+			source=realloc(source,sz);
+			assert(source);
+		}
+		char c=fgetc(f);
+		if(feof(f))break;
+		if(!strchr("+-><[].,",c))continue;
+		source[i++]=c;
+	}
+	source[i]='\0';
+	*sourcep=source;
+}
+
 int main(int argc,char **argv){
 	parseargs(argc,argv);
 
 	FILE *srcf=fopen(params.srcfname,"r");
 	assert(srcf);
 
+	char *source;
+	readsource(srcf,&source);
+	assert(source);
+
+	fclose(srcf);
+
 	char asmfname[20];
 	FILE *asmf=gettempfilew(asmfname);
 	if(params.verbose)fprintf(stderr,"asm -> %s\n",asmfname);
 
 	DBGTIME("writeprologue",writeprologue(asmf););
-	DBGTIME("writeprogram",writeprogram(srcf,asmf););
+	DBGTIME("writeprogram",writeprogram(source,asmf););
 	DBGTIME("writeepilogue",writeepilogue(asmf););
 
 	fclose(asmf);
-	fclose(srcf);
 
 	int ret=compilechain(asmfname,params.dstfname);
 	unlink(asmfname);
-- 
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