libfitsy

1 files changed, 194 insertions, 0 deletions

diff --git a/fitsy/envilex.L b/fitsy/envilex.L
new file mode 100644
index 0000000..5621a04
--- /dev/null
+++ b/fitsy/envilex.L
@@ -0,0 +1,194 @@
+/* Copyright (C) 1999-2018
+ * Smithsonian Astrophysical Observatory, Cambridge, MA, USA
+ * For conditions of distribution and use, see copyright notice in "copyright"
+ */
+%option noyywrap
+%option caseless
+%option never-interactive
+%option c++
+
+%{
+  #include <stdio.h>
+  #include <stdlib.h>
+  #include <string.h>
+
+  #include "util.h"
+  #include "enviparser.H"
+
+  extern YYSTYPE* envilval;
+  extern enviFlexLexer* envilexx;
+%}
+
+%x DISCARD
+%x BRACKET
+
+D   [0-9]
+E   [Ee][+-]?{D}+
+
+/* rules */
+
+%%
+
+<DISCARD>[\n]	{ // special case-- #\n
+		  BEGIN INITIAL;
+		  yyless(0);             // put back the terminator
+		  strcpy(envilval->str,""); // feed a blank string
+		  return STRING;
+		}
+
+<DISCARD>[^\n]* {  // Discard reset of line
+		  BEGIN INITIAL;
+		  int ll = yyleng <(ENVIPARSERSIZE-1) ? yyleng:(ENVIPARSERSIZE-1);
+		  strncpy(envilval->str,yytext,ll);
+	          envilval->str[ll] = '\0';
+		  return STRING;
+		}
+
+\{               {
+                  BEGIN BRACKET;
+                  return '{';
+                }
+
+<BRACKET>\}      {
+		  BEGIN INITIAL;
+                  return '}';
+                }
+
+debug           {return DEBUG_;}
+on              {return ON_;}
+off             {return OFF_;}
+
+average         {return AVERAGE_;}
+band            {return BAND_;}
+bands           {return BANDS_;}
+bbl             {return BBL_;}
+bil             {return BIL_;}
+bip             {return BIP_;}
+bsq             {return BSQ_;}
+byte            {return BYTE_;}
+envi            {return ENVI_;}
+data            {return DATA_;}
+default         {return DEFAULT_;}
+description     {return DESCRIPTION_;}
+factor          {return FACTOR_;}
+frame           {return FRAME_;}
+file            {return FILE_;}
+fwhm            {return FWHM_;}
+gain            {return GAIN_;}
+header          {return HEADER_;}
+info            {return INFO_;}
+ignore          {return IGNORE_;}
+interleave      {return INTERLEAVE_;}
+limits          {return LIMITS_;}
+lines           {return LINES_;}
+major           {return MAJOR_;}
+map             {return MAP_;}
+minor           {return MINOR_;}
+names           {return NAMES_;}
+offset          {return OFFSET_;}
+offsets         {return OFFSETS_;}
+order           {return ORDER_;}
+pixel           {return PIXEL_;}
+pixels          {return PIXELS_;}
+plot            {return PLOT_;}
+projection      {return PROJECTION_;}
+range           {return RANGE_;}
+reflectance     {return REFLECTANCE_;}
+samples         {return SAMPLES_;}
+scale           {return SCALE_;}
+scanner         {return SCANNER_;}
+sensor          {return SENSOR_;}
+size            {return SIZE_;}
+stretch         {return STRETCH_;}
+titles          {return TITLES_;}
+type            {return TYPE_;}
+units           {return UNITS_;}
+value           {return VALUE_;}
+values          {return VALUES_;}
+wavelength      {return WAVELENGTH_;}
+
+
+<BRACKET>[+-]?{D}+ { // Integer
+		  envilval->integer = atoi(yytext);
+		  return INT;
+		}
+
+<BRACKET>[+-]?{D}+"."?({E})? |
+<BRACKET>[+-]?{D}*"."{D}+({E})? { // Real Number
+		  envilval->real = atof(yytext);
+		  return REAL;
+		}
+
+
+<BRACKET>[0-9A-Za-z\-]+	{ // General String
+		  int ll = yyleng <(ENVIPARSERSIZE-1) ? yyleng:(ENVIPARSERSIZE-1);
+		  strncpy(envilval->str,yytext,ll);
+	          envilval->str[ll] = '\0';
+		  return STRING;
+		}
+
+<BRACKET>,      {
+                  return ',';
+                }
+
+<BRACKET>[ \t]+	{ // White Spaces
+		} 
+
+<BRACKET>\n	{ // linefeed
+		}
+
+<BRACKET>.      { // other chars, eat it
+                }
+
+[+-]?{D}+	{ // Integer
+		  envilval->integer = atoi(yytext);
+		  return INT;
+		}
+
+[+-]?{D}+"."?({E})? |
+[+-]?{D}*"."{D}+({E})? { // Real Number
+		  envilval->real = atof(yytext);
+		  return REAL;
+		}
+
+
+[0-9A-Za-z]+	{ // General String
+		  int ll = yyleng <(ENVIPARSERSIZE-1) ? yyleng:(ENVIPARSERSIZE-1);
+		  strncpy(envilval->str,yytext,ll);
+	          envilval->str[ll] = '\0';
+		  return STRING;
+		}
+
+[ \t]+		{ // White Spaces
+		} 
+
+\r\n		{ // windows line feed
+		  return '\n';
+		}
+
+\n		{ // linefeed
+		  return '\n';
+		}
+
+<<EOF>>		{ // eof
+		  return EOF_;
+		}
+
+.		{ // Else, return the char
+		  return yytext[0];
+		}
+
+%%
+
+void enviDiscard(int doit)
+{
+  if (envilexx)
+    envilexx->begin(DISCARD, doit);
+}
+
+void enviFlexLexer::begin(int which, int doit)
+{
+  BEGIN which;
+  if (doit)
+    yyless(0);
+}