v0.5.1

1 files changed, 193 insertions, 0 deletions

diff --git a/src/lex.l b/src/lex.l
new file mode 100644
index 0000000..85bf522
--- /dev/null
+++ b/src/lex.l
@@ -0,0 +1,193 @@
+%{
+#include <stdio.h>
+#include <stdlib.h>
+#include "linenoise/linenoise.h"
+
+#undef YY_INPUT
+#define YY_INPUT(buf,result,max_size) result = mygetinput(buf, max_size);
+
+static int mygetinput(char *buf, int size) {
+    char *line;
+    if (feof(yyin))  return YY_NULL;
+
+    if (yyin!=stdin) {
+      int len;
+      char ch;
+      for (len = 0; len < size; len++) {
+	ch = getc(yyin);
+	if (ch == EOF)
+	    break;
+	buf[len] = ch;
+      }
+      return len;
+    }
+
+    linenoiseSetMultiLine(1);
+    if (yylineno == 1) {
+      line = linenoise(">>> ");
+    } else {
+      line = linenoise("... ");
+    }      
+    if(!line)        return YY_NULL;
+    if(strlen(line) > size-2){
+      fprintf(stderr,"input line too long\n");
+      return YY_NULL;
+    }
+    sprintf(buf, "%s\n", line);
+    linenoiseHistoryAdd(line);
+    linenoiseHistorySave(".inpla.history.txt"); 
+    free(line);
+    return strlen(buf);
+}   
+
+
+//#undef YY_INPUT
+//#define YYINPUT(buf, result, max_size) result = (c == EOF) ? YY_NULL : (buf[0] = c, 1); 
+
+
+/************************************
+ Strings
+*************************************/
+#define MAX_STRING_LENGTH 1024
+static char ParseStringBuffer[MAX_STRING_LENGTH];
+static int nextPtr_ParseStringBuffer = 0;
+void Parse_StringBuffer_reInit() {
+  nextPtr_ParseStringBuffer = 0;
+}
+
+void Parse_addString(char ch) {
+  ParseStringBuffer[nextPtr_ParseStringBuffer] = ch;
+  nextPtr_ParseStringBuffer++;
+}
+
+char *Parse_closeStringBuffer() {
+  char *ret;
+  ParseStringBuffer[nextPtr_ParseStringBuffer]='\0';
+  ret = ParseStringBuffer;
+  return ret;
+}
+
+
+
+%}
+
+%option nounput
+%option yylineno
+%option noyywrap
+%x STRING_STATE COM_STATE
+%%
+<INITIAL>";" return (DELIMITER);
+<INITIAL>":" return (COLON);
+<INITIAL>"(" return (LP);
+<INITIAL>")" return (RP);
+<INITIAL>"{" return LC;
+<INITIAL>"}" return RC;
+<INITIAL>"[" return LB;
+<INITIAL>"]" return RB;
+<INITIAL>"," return (COMMA);
+<INITIAL>"><" return (CROSS);
+<INITIAL>"=>" return (TO);
+<INITIAL>"~" return (CNCT);
+<INITIAL>"-" return (SUB);
+<INITIAL>"|" return(PIPE);
+<INITIAL>"&" return(AMP);
+<INITIAL>"=" return(LD);
+<INITIAL>"==" return(EQUAL);
+<INITIAL>"!=" return(NE);
+<INITIAL>">" return(GT);
+<INITIAL>">=" return(GE);
+<INITIAL>"<" return(LT);
+<INITIAL>"<=" return(LE);
+<INITIAL>"+" return (ADD);
+<INITIAL>"*" return (MUL);
+<INITIAL>"/" return (DIV);
+<INITIAL>"%" return (MOD);
+<INITIAL>"_" return (ANY);
+<INITIAL>"<<" return (ABR);
+
+<INITIAL>"int" return(INT);
+
+<INITIAL>"let" return(LET);
+<INITIAL>"in" return(IN);
+<INITIAL>"end" return(END);
+
+<INITIAL>"where" return(WHERE);
+
+<INITIAL>"if" return(IF);
+<INITIAL>"then" return(THEN);
+<INITIAL>"else" return(ELSE);
+
+<INITIAL>"interface" return(INTERFACE);
+<INITIAL>"ifce" return(IFCE);
+
+<INITIAL>"prnat" return(PRNAT);
+<INITIAL>"free" return(FREE);
+<INITIAL>"exit" return(EXIT);
+
+<INITIAL>"rand" return(RAND);
+
+<INITIAL>"const" return(DEF);
+
+<INITIAL>"use" return(USE);
+
+<INITIAL>"*L" return(ANNOTATE_L);
+<INITIAL>"*R" return(ANNOTATE_R);
+<INITIAL>[a-z][a-zA-Z0-9_'\.]* { yylval.chval = strdup(yytext);
+         return (NAME);}
+<INITIAL>[A-Z][a-zA-Z0-9_'\.]* { yylval.chval = strdup(yytext);
+         return (AGENT);}
+<INITIAL>[0-9]+ { yylval.intval = atoi(yytext);
+         return (INT_LITERAL);}
+
+<INITIAL>"//"[^\n]* ; //comment
+<INITIAL>"/*" BEGIN(COM_STATE);
+<COM_STATE>. ;
+<COM_STATE>\n ;
+<COM_STATE>"*/" BEGIN INITIAL; //comment
+
+<INITIAL>\r\n ;
+<INITIAL>[\n|\r] ;
+<INITIAL>[ \t]+ ;
+<INITIAL><<EOF>> {return END_OF_FILE;}
+<INITIAL>\" {
+    Parse_StringBuffer_reInit();
+    BEGIN STRING_STATE;
+}
+
+<INITIAL>. {return yytext[0];}
+
+
+
+
+<STRING_STATE>\"        {
+    yylval.chval = strdup(Parse_closeStringBuffer());
+    BEGIN INITIAL;
+    return STRING_LITERAL;
+}
+<STRING_STATE>\n        {
+//    Parse_addString('\n');
+yyerror("Unterminated string");
+BEGIN(INITIAL);
+return DELIMITER;
+}
+<STRING_STATE>\\\"      Parse_addString('"');
+<STRING_STATE>\\n       Parse_addString('\n');
+<STRING_STATE>\\t       Parse_addString('\t');
+<STRING_STATE>\\\\      Parse_addString('\\');
+<STRING_STATE>.         Parse_addString(yytext[0]);
+%%
+
+void pushFP(FILE *fp) {
+  yypush_buffer_state(yy_create_buffer(fp, YY_BUF_SIZE));
+}
+
+int popFP() {
+  yypop_buffer_state();
+  if (! YY_CURRENT_BUFFER ) {
+    yyterminate();
+    return 0;
+  }
+  return 1;
+}
+
+