ENH: Add rudamentary mathematical expression support

1 files changed, 316 insertions, 0 deletions

diff --git a/Source/cmExprLexer.h b/Source/cmExprLexer.h
new file mode 100644
index 0000000000..ce20bfd4e9
--- /dev/null
+++ b/Source/cmExprLexer.h
@@ -0,0 +1,316 @@
+#ifndef cmExpr_yyHEADER_H
+#define cmExpr_yyHEADER_H 1
+#define cmExpr_yyIN_HEADER 1
+
+
+
+
+
+#define  YY_INT_ALIGNED short int
+
+/* A lexical scanner generated by flex */
+
+#define FLEX_SCANNER
+#define YY_FLEX_MAJOR_VERSION 2
+#define YY_FLEX_MINOR_VERSION 5
+#define YY_FLEX_SUBMINOR_VERSION 31
+#if YY_FLEX_SUBMINOR_VERSION > 0
+#define FLEX_BETA
+#endif
+
+/* First, we deal with  platform-specific or compiler-specific issues. */
+
+/* begin standard C headers. */
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <stdlib.h>
+
+/* end standard C headers. */
+
+/* flex integer type definitions */
+
+#ifndef FLEXINT_H
+#define FLEXINT_H
+
+/* C99 systems have <inttypes.h>. Non-C99 systems may or may not. */
+
+#if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
+#include <inttypes.h>
+typedef int8_t flex_int8_t;
+typedef uint8_t flex_uint8_t;
+typedef int16_t flex_int16_t;
+typedef uint16_t flex_uint16_t;
+typedef int32_t flex_int32_t;
+typedef uint32_t flex_uint32_t;
+#else
+typedef signed char flex_int8_t;
+typedef short int flex_int16_t;
+typedef int flex_int32_t;
+typedef unsigned char flex_uint8_t; 
+typedef unsigned short int flex_uint16_t;
+typedef unsigned int flex_uint32_t;
+#endif /* ! C99 */
+
+/* Limits of integral types. */
+#ifndef INT8_MIN
+#define INT8_MIN               (-128)
+#endif
+#ifndef INT16_MIN
+#define INT16_MIN              (-32767-1)
+#endif
+#ifndef INT32_MIN
+#define INT32_MIN              (-2147483647-1)
+#endif
+#ifndef INT8_MAX
+#define INT8_MAX               (127)
+#endif
+#ifndef INT16_MAX
+#define INT16_MAX              (32767)
+#endif
+#ifndef INT32_MAX
+#define INT32_MAX              (2147483647)
+#endif
+#ifndef UINT8_MAX
+#define UINT8_MAX              (255U)
+#endif
+#ifndef UINT16_MAX
+#define UINT16_MAX             (65535U)
+#endif
+#ifndef UINT32_MAX
+#define UINT32_MAX             (4294967295U)
+#endif
+
+#endif /* ! FLEXINT_H */
+
+#ifdef __cplusplus
+
+/* The "const" storage-class-modifier is valid. */
+#define YY_USE_CONST
+
+#else  /* ! __cplusplus */
+
+#if __STDC__
+
+#define YY_USE_CONST
+
+#endif  /* __STDC__ */
+#endif  /* ! __cplusplus */
+
+#ifdef YY_USE_CONST
+#define yyconst const
+#else
+#define yyconst
+#endif
+
+/* An opaque pointer. */
+#ifndef YY_TYPEDEF_YY_SCANNER_T
+#define YY_TYPEDEF_YY_SCANNER_T
+typedef void* yyscan_t;
+#endif
+
+/* For convenience, these vars (plus the bison vars far below)
+   are macros in the reentrant scanner. */
+#define yyin yyg->yyin_r
+#define yyout yyg->yyout_r
+#define yyextra yyg->yyextra_r
+#define yyleng yyg->yyleng_r
+#define yytext yyg->yytext_r
+#define yylineno (YY_CURRENT_BUFFER_LVALUE->yy_bs_lineno)
+#define yycolumn (YY_CURRENT_BUFFER_LVALUE->yy_bs_column)
+#define yy_flex_debug yyg->yy_flex_debug_r
+
+int cmExpr_yylex_init (yyscan_t* scanner);
+
+#ifndef YY_TYPEDEF_YY_BUFFER_STATE
+#define YY_TYPEDEF_YY_BUFFER_STATE
+typedef struct yy_buffer_state *YY_BUFFER_STATE;
+#endif
+
+/* The following is because we cannot portably get our hands on size_t
+ * (without autoconf's help, which isn't available because we want
+ * flex-generated scanners to compile on their own).
+ */
+
+#ifndef YY_TYPEDEF_YY_SIZE_T
+#define YY_TYPEDEF_YY_SIZE_T
+typedef unsigned int yy_size_t;
+#endif
+
+#ifndef YY_STRUCT_YY_BUFFER_STATE
+#define YY_STRUCT_YY_BUFFER_STATE
+struct yy_buffer_state
+  {
+  FILE *yy_input_file;
+
+  char *yy_ch_buf;    /* input buffer */
+  char *yy_buf_pos;    /* current position in input buffer */
+
+  /* Size of input buffer in bytes, not including room for EOB
+   * characters.
+   */
+  yy_size_t yy_buf_size;
+
+  /* Number of characters read into yy_ch_buf, not including EOB
+   * characters.
+   */
+  int yy_n_chars;
+
+  /* Whether we "own" the buffer - i.e., we know we created it,
+   * and can realloc() it to grow it, and should free() it to
+   * delete it.
+   */
+  int yy_is_our_buffer;
+
+  /* Whether this is an "interactive" input source; if so, and
+   * if we're using stdio for input, then we want to use getc()
+   * instead of fread(), to make sure we stop fetching input after
+   * each newline.
+   */
+  int yy_is_interactive;
+
+  /* Whether we're considered to be at the beginning of a line.
+   * If so, '^' rules will be active on the next match, otherwise
+   * not.
+   */
+  int yy_at_bol;
+
+    int yy_bs_lineno; /**< The line count. */
+    int yy_bs_column; /**< The column count. */
+    
+  /* Whether to try to fill the input buffer when we reach the
+   * end of it.
+   */
+  int yy_fill_buffer;
+
+  int yy_buffer_status;
+
+  };
+#endif /* !YY_STRUCT_YY_BUFFER_STATE */
+
+void cmExpr_yyrestart (FILE *input_file ,yyscan_t yyscanner );
+void cmExpr_yy_switch_to_buffer (YY_BUFFER_STATE new_buffer ,yyscan_t yyscanner );
+YY_BUFFER_STATE cmExpr_yy_create_buffer (FILE *file,int size ,yyscan_t yyscanner );
+void cmExpr_yy_delete_buffer (YY_BUFFER_STATE b ,yyscan_t yyscanner );
+void cmExpr_yy_flush_buffer (YY_BUFFER_STATE b ,yyscan_t yyscanner );
+void cmExpr_yypush_buffer_state (YY_BUFFER_STATE new_buffer ,yyscan_t yyscanner );
+void cmExpr_yypop_buffer_state (yyscan_t yyscanner );
+
+YY_BUFFER_STATE cmExpr_yy_scan_buffer (char *base,yy_size_t size ,yyscan_t yyscanner );
+YY_BUFFER_STATE cmExpr_yy_scan_string (yyconst char *yy_str ,yyscan_t yyscanner );
+YY_BUFFER_STATE cmExpr_yy_scan_bytes (yyconst char *bytes,int len ,yyscan_t yyscanner );
+
+void *cmExpr_yyalloc (yy_size_t ,yyscan_t yyscanner );
+void *cmExpr_yyrealloc (void *,yy_size_t ,yyscan_t yyscanner );
+void cmExpr_yyfree (void * ,yyscan_t yyscanner );
+
+/* Begin user sect3 */
+
+#define cmExpr_yywrap(n) 1
+#define YY_SKIP_YYWRAP
+
+#define yytext_ptr yytext_r
+
+#ifdef YY_HEADER_EXPORT_START_CONDITIONS
+#define INITIAL 0
+
+#endif
+
+#ifndef YY_EXTRA_TYPE
+#define YY_EXTRA_TYPE void *
+#endif
+
+/* Accessor methods to globals.
+   These are made visible to non-reentrant scanners for convenience. */
+
+int cmExpr_yylex_destroy (yyscan_t yyscanner );
+
+int cmExpr_yyget_debug (yyscan_t yyscanner );
+
+void cmExpr_yyset_debug (int debug_flag ,yyscan_t yyscanner );
+
+YY_EXTRA_TYPE cmExpr_yyget_extra (yyscan_t yyscanner );
+
+void cmExpr_yyset_extra (YY_EXTRA_TYPE user_defined ,yyscan_t yyscanner );
+
+FILE *cmExpr_yyget_in (yyscan_t yyscanner );
+
+void cmExpr_yyset_in  (FILE * in_str ,yyscan_t yyscanner );
+
+FILE *cmExpr_yyget_out (yyscan_t yyscanner );
+
+void cmExpr_yyset_out  (FILE * out_str ,yyscan_t yyscanner );
+
+int cmExpr_yyget_leng (yyscan_t yyscanner );
+
+char *cmExpr_yyget_text (yyscan_t yyscanner );
+
+int cmExpr_yyget_lineno (yyscan_t yyscanner );
+
+void cmExpr_yyset_lineno (int line_number ,yyscan_t yyscanner );
+
+/* Macros after this point can all be overridden by user definitions in
+ * section 1.
+ */
+
+#ifndef YY_SKIP_YYWRAP
+#ifdef __cplusplus
+extern "C" int cmExpr_yywrap (yyscan_t yyscanner );
+#else
+extern int cmExpr_yywrap (yyscan_t yyscanner );
+#endif
+#endif
+
+#ifndef yytext_ptr
+static void yy_flex_strncpy (char *,yyconst char *,int ,yyscan_t yyscanner);
+#endif
+
+#ifdef YY_NEED_STRLEN
+static int yy_flex_strlen (yyconst char * ,yyscan_t yyscanner);
+#endif
+
+#ifndef YY_NO_INPUT
+
+#endif
+
+/* Amount of stuff to slurp up with each read. */
+#ifndef YY_READ_BUF_SIZE
+#define YY_READ_BUF_SIZE 8192
+#endif
+
+/* Number of entries by which start-condition stack grows. */
+#ifndef YY_START_STACK_INCR
+#define YY_START_STACK_INCR 25
+#endif
+
+/* Default declaration of generated scanner - a define so the user can
+ * easily add parameters.
+ */
+#ifndef YY_DECL
+#define YY_DECL_IS_OURS 1
+
+extern int cmExpr_yylex (yyscan_t yyscanner);
+
+#define YY_DECL int cmExpr_yylex (yyscan_t yyscanner)
+#endif /* !YY_DECL */
+
+/* yy_get_previous_state - get the state just before the EOB char was reached */
+
+#undef YY_NEW_FILE
+#undef YY_FLUSH_BUFFER
+#undef yy_set_bol
+#undef yy_new_buffer
+#undef yy_set_interactive
+#undef yytext_ptr
+#undef YY_DO_BEFORE_ACTION
+
+#ifdef YY_DECL_IS_OURS
+#undef YY_DECL_IS_OURS
+#undef YY_DECL
+#endif
+
+
+
+
+#undef cmExpr_yyIN_HEADER
+#endif /* cmExpr_yyHEADER_H */