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-rw-r--r--src/preproc/refer/label.cpp2607
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diff --git a/src/preproc/refer/label.cpp b/src/preproc/refer/label.cpp
new file mode 100644
index 0000000..f8c1645
--- /dev/null
+++ b/src/preproc/refer/label.cpp
@@ -0,0 +1,2607 @@
+/* A Bison parser, made by GNU Bison 3.8.2. */
+
+/* Bison implementation for Yacc-like parsers in C
+
+ Copyright (C) 1984, 1989-1990, 2000-2015, 2018-2021 Free Software Foundation,
+ Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+/* As a special exception, you may create a larger work that contains
+ part or all of the Bison parser skeleton and distribute that work
+ under terms of your choice, so long as that work isn't itself a
+ parser generator using the skeleton or a modified version thereof
+ as a parser skeleton. Alternatively, if you modify or redistribute
+ the parser skeleton itself, you may (at your option) remove this
+ special exception, which will cause the skeleton and the resulting
+ Bison output files to be licensed under the GNU General Public
+ License without this special exception.
+
+ This special exception was added by the Free Software Foundation in
+ version 2.2 of Bison. */
+
+/* C LALR(1) parser skeleton written by Richard Stallman, by
+ simplifying the original so-called "semantic" parser. */
+
+/* DO NOT RELY ON FEATURES THAT ARE NOT DOCUMENTED in the manual,
+ especially those whose name start with YY_ or yy_. They are
+ private implementation details that can be changed or removed. */
+
+/* All symbols defined below should begin with yy or YY, to avoid
+ infringing on user name space. This should be done even for local
+ variables, as they might otherwise be expanded by user macros.
+ There are some unavoidable exceptions within include files to
+ define necessary library symbols; they are noted "INFRINGES ON
+ USER NAME SPACE" below. */
+
+/* Identify Bison output, and Bison version. */
+#define YYBISON 30802
+
+/* Bison version string. */
+#define YYBISON_VERSION "3.8.2"
+
+/* Skeleton name. */
+#define YYSKELETON_NAME "yacc.c"
+
+/* Pure parsers. */
+#define YYPURE 0
+
+/* Push parsers. */
+#define YYPUSH 0
+
+/* Pull parsers. */
+#define YYPULL 1
+
+
+
+
+/* First part of user prologue. */
+#line 19 "../src/preproc/refer/label.ypp"
+
+
+#include "refer.h"
+#include "refid.h"
+#include "ref.h"
+#include "token.h"
+
+int yylex();
+void yyerror(const char *);
+
+static const char *format_serial(char c, int n);
+
+struct label_info {
+ int start;
+ int length;
+ int count;
+ int total;
+ label_info(const string &);
+};
+
+label_info *lookup_label(const string &label);
+
+struct expression {
+ enum {
+ // Does the tentative label depend on the reference?
+ CONTAINS_VARIABLE = 01,
+ CONTAINS_STAR = 02,
+ CONTAINS_FORMAT = 04,
+ CONTAINS_AT = 010
+ };
+ virtual ~expression() { }
+ virtual void evaluate(int, const reference &, string &,
+ substring_position &) = 0;
+ virtual unsigned analyze() { return 0; }
+};
+
+class at_expr : public expression {
+public:
+ at_expr() { }
+ void evaluate(int, const reference &, string &, substring_position &);
+ unsigned analyze() { return CONTAINS_VARIABLE|CONTAINS_AT; }
+};
+
+class format_expr : public expression {
+ char type;
+ int width;
+ int first_number;
+public:
+ format_expr(char c, int w = 0, int f = 1)
+ : type(c), width(w), first_number(f) { }
+ void evaluate(int, const reference &, string &, substring_position &);
+ unsigned analyze() { return CONTAINS_FORMAT; }
+};
+
+class field_expr : public expression {
+ int number;
+ char name;
+public:
+ field_expr(char nm, int num) : number(num), name(nm) { }
+ void evaluate(int, const reference &, string &, substring_position &);
+ unsigned analyze() { return CONTAINS_VARIABLE; }
+};
+
+class literal_expr : public expression {
+ string s;
+public:
+ literal_expr(const char *ptr, int len) : s(ptr, len) { }
+ void evaluate(int, const reference &, string &, substring_position &);
+};
+
+class unary_expr : public expression {
+protected:
+ expression *expr;
+public:
+ unary_expr(expression *e) : expr(e) { }
+ ~unary_expr() { delete expr; }
+ void evaluate(int, const reference &, string &, substring_position &) = 0;
+ unsigned analyze() { return expr ? expr->analyze() : 0; }
+};
+
+// This caches the analysis of an expression.
+
+class analyzed_expr : public unary_expr {
+ unsigned flags;
+public:
+ analyzed_expr(expression *);
+ void evaluate(int, const reference &, string &, substring_position &);
+ unsigned analyze() { return flags; }
+};
+
+class star_expr : public unary_expr {
+public:
+ star_expr(expression *e) : unary_expr(e) { }
+ void evaluate(int, const reference &, string &, substring_position &);
+ unsigned analyze() {
+ return ((expr ? (expr->analyze() & ~CONTAINS_VARIABLE) : 0)
+ | CONTAINS_STAR);
+ }
+};
+
+typedef void map_func(const char *, const char *, string &);
+
+class map_expr : public unary_expr {
+ map_func *func;
+public:
+ map_expr(expression *e, map_func *f) : unary_expr(e), func(f) { }
+ void evaluate(int, const reference &, string &, substring_position &);
+};
+
+typedef const char *extractor_func(const char *, const char *, const char **);
+
+class extractor_expr : public unary_expr {
+ int part;
+ extractor_func *func;
+public:
+ enum { BEFORE = +1, MATCH = 0, AFTER = -1 };
+ extractor_expr(expression *e, extractor_func *f, int pt)
+ : unary_expr(e), part(pt), func(f) { }
+ void evaluate(int, const reference &, string &, substring_position &);
+};
+
+class truncate_expr : public unary_expr {
+ int n;
+public:
+ truncate_expr(expression *e, int i) : unary_expr(e), n(i) { }
+ void evaluate(int, const reference &, string &, substring_position &);
+};
+
+class separator_expr : public unary_expr {
+public:
+ separator_expr(expression *e) : unary_expr(e) { }
+ void evaluate(int, const reference &, string &, substring_position &);
+};
+
+class binary_expr : public expression {
+protected:
+ expression *expr1;
+ expression *expr2;
+public:
+ binary_expr(expression *e1, expression *e2) : expr1(e1), expr2(e2) { }
+ ~binary_expr() { delete expr1; delete expr2; }
+ void evaluate(int, const reference &, string &, substring_position &) = 0;
+ unsigned analyze() {
+ return (expr1 ? expr1->analyze() : 0) | (expr2 ? expr2->analyze() : 0);
+ }
+};
+
+class alternative_expr : public binary_expr {
+public:
+ alternative_expr(expression *e1, expression *e2) : binary_expr(e1, e2) { }
+ void evaluate(int, const reference &, string &, substring_position &);
+};
+
+class list_expr : public binary_expr {
+public:
+ list_expr(expression *e1, expression *e2) : binary_expr(e1, e2) { }
+ void evaluate(int, const reference &, string &, substring_position &);
+};
+
+class substitute_expr : public binary_expr {
+public:
+ substitute_expr(expression *e1, expression *e2) : binary_expr(e1, e2) { }
+ void evaluate(int, const reference &, string &, substring_position &);
+};
+
+class ternary_expr : public expression {
+protected:
+ expression *expr1;
+ expression *expr2;
+ expression *expr3;
+public:
+ ternary_expr(expression *e1, expression *e2, expression *e3)
+ : expr1(e1), expr2(e2), expr3(e3) { }
+ ~ternary_expr() { delete expr1; delete expr2; delete expr3; }
+ void evaluate(int, const reference &, string &, substring_position &) = 0;
+ unsigned analyze() {
+ return ((expr1 ? expr1->analyze() : 0)
+ | (expr2 ? expr2->analyze() : 0)
+ | (expr3 ? expr3->analyze() : 0));
+ }
+};
+
+class conditional_expr : public ternary_expr {
+public:
+ conditional_expr(expression *e1, expression *e2, expression *e3)
+ : ternary_expr(e1, e2, e3) { }
+ void evaluate(int, const reference &, string &, substring_position &);
+};
+
+static expression *parsed_label = 0;
+static expression *parsed_date_label = 0;
+static expression *parsed_short_label = 0;
+
+static expression *parse_result;
+
+string literals;
+
+
+#line 270 "src/preproc/refer/label.cpp"
+
+# ifndef YY_CAST
+# ifdef __cplusplus
+# define YY_CAST(Type, Val) static_cast<Type> (Val)
+# define YY_REINTERPRET_CAST(Type, Val) reinterpret_cast<Type> (Val)
+# else
+# define YY_CAST(Type, Val) ((Type) (Val))
+# define YY_REINTERPRET_CAST(Type, Val) ((Type) (Val))
+# endif
+# endif
+# ifndef YY_NULLPTR
+# if defined __cplusplus
+# if 201103L <= __cplusplus
+# define YY_NULLPTR nullptr
+# else
+# define YY_NULLPTR 0
+# endif
+# else
+# define YY_NULLPTR ((void*)0)
+# endif
+# endif
+
+/* Use api.header.include to #include this header
+ instead of duplicating it here. */
+#ifndef YY_YY_SRC_PREPROC_REFER_LABEL_HPP_INCLUDED
+# define YY_YY_SRC_PREPROC_REFER_LABEL_HPP_INCLUDED
+/* Debug traces. */
+#ifndef YYDEBUG
+# define YYDEBUG 0
+#endif
+#if YYDEBUG
+extern int yydebug;
+#endif
+
+/* Token kinds. */
+#ifndef YYTOKENTYPE
+# define YYTOKENTYPE
+ enum yytokentype
+ {
+ YYEMPTY = -2,
+ YYEOF = 0, /* "end of file" */
+ YYerror = 256, /* error */
+ YYUNDEF = 257, /* "invalid token" */
+ TOKEN_LETTER = 258, /* TOKEN_LETTER */
+ TOKEN_LITERAL = 259, /* TOKEN_LITERAL */
+ TOKEN_DIGIT = 260 /* TOKEN_DIGIT */
+ };
+ typedef enum yytokentype yytoken_kind_t;
+#endif
+/* Token kinds. */
+#define YYEMPTY -2
+#define YYEOF 0
+#define YYerror 256
+#define YYUNDEF 257
+#define TOKEN_LETTER 258
+#define TOKEN_LITERAL 259
+#define TOKEN_DIGIT 260
+
+/* Value type. */
+#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
+union YYSTYPE
+{
+#line 218 "../src/preproc/refer/label.ypp"
+
+ int num;
+ expression *expr;
+ struct { int ndigits; int val; } dig;
+ struct { int start; int len; } str;
+
+#line 340 "src/preproc/refer/label.cpp"
+
+};
+typedef union YYSTYPE YYSTYPE;
+# define YYSTYPE_IS_TRIVIAL 1
+# define YYSTYPE_IS_DECLARED 1
+#endif
+
+
+extern YYSTYPE yylval;
+
+
+int yyparse (void);
+
+
+#endif /* !YY_YY_SRC_PREPROC_REFER_LABEL_HPP_INCLUDED */
+/* Symbol kind. */
+enum yysymbol_kind_t
+{
+ YYSYMBOL_YYEMPTY = -2,
+ YYSYMBOL_YYEOF = 0, /* "end of file" */
+ YYSYMBOL_YYerror = 1, /* error */
+ YYSYMBOL_YYUNDEF = 2, /* "invalid token" */
+ YYSYMBOL_TOKEN_LETTER = 3, /* TOKEN_LETTER */
+ YYSYMBOL_TOKEN_LITERAL = 4, /* TOKEN_LITERAL */
+ YYSYMBOL_TOKEN_DIGIT = 5, /* TOKEN_DIGIT */
+ YYSYMBOL_6_ = 6, /* '?' */
+ YYSYMBOL_7_ = 7, /* ':' */
+ YYSYMBOL_8_ = 8, /* '|' */
+ YYSYMBOL_9_ = 9, /* '&' */
+ YYSYMBOL_10_ = 10, /* '~' */
+ YYSYMBOL_11_ = 11, /* '@' */
+ YYSYMBOL_12_ = 12, /* '%' */
+ YYSYMBOL_13_ = 13, /* '.' */
+ YYSYMBOL_14_ = 14, /* '+' */
+ YYSYMBOL_15_ = 15, /* '-' */
+ YYSYMBOL_16_ = 16, /* '*' */
+ YYSYMBOL_17_ = 17, /* '(' */
+ YYSYMBOL_18_ = 18, /* ')' */
+ YYSYMBOL_19_ = 19, /* '<' */
+ YYSYMBOL_20_ = 20, /* '>' */
+ YYSYMBOL_YYACCEPT = 21, /* $accept */
+ YYSYMBOL_expr = 22, /* expr */
+ YYSYMBOL_conditional = 23, /* conditional */
+ YYSYMBOL_optional_conditional = 24, /* optional_conditional */
+ YYSYMBOL_alternative = 25, /* alternative */
+ YYSYMBOL_list = 26, /* list */
+ YYSYMBOL_substitute = 27, /* substitute */
+ YYSYMBOL_string = 28, /* string */
+ YYSYMBOL_optional_number = 29, /* optional_number */
+ YYSYMBOL_number = 30, /* number */
+ YYSYMBOL_digits = 31, /* digits */
+ YYSYMBOL_flag = 32 /* flag */
+};
+typedef enum yysymbol_kind_t yysymbol_kind_t;
+
+
+
+
+#ifdef short
+# undef short
+#endif
+
+/* On compilers that do not define __PTRDIFF_MAX__ etc., make sure
+ <limits.h> and (if available) <stdint.h> are included
+ so that the code can choose integer types of a good width. */
+
+#ifndef __PTRDIFF_MAX__
+# include <limits.h> /* INFRINGES ON USER NAME SPACE */
+# if defined __STDC_VERSION__ && 199901 <= __STDC_VERSION__
+# include <stdint.h> /* INFRINGES ON USER NAME SPACE */
+# define YY_STDINT_H
+# endif
+#endif
+
+/* Narrow types that promote to a signed type and that can represent a
+ signed or unsigned integer of at least N bits. In tables they can
+ save space and decrease cache pressure. Promoting to a signed type
+ helps avoid bugs in integer arithmetic. */
+
+#ifdef __INT_LEAST8_MAX__
+typedef __INT_LEAST8_TYPE__ yytype_int8;
+#elif defined YY_STDINT_H
+typedef int_least8_t yytype_int8;
+#else
+typedef signed char yytype_int8;
+#endif
+
+#ifdef __INT_LEAST16_MAX__
+typedef __INT_LEAST16_TYPE__ yytype_int16;
+#elif defined YY_STDINT_H
+typedef int_least16_t yytype_int16;
+#else
+typedef short yytype_int16;
+#endif
+
+/* Work around bug in HP-UX 11.23, which defines these macros
+ incorrectly for preprocessor constants. This workaround can likely
+ be removed in 2023, as HPE has promised support for HP-UX 11.23
+ (aka HP-UX 11i v2) only through the end of 2022; see Table 2 of
+ <https://h20195.www2.hpe.com/V2/getpdf.aspx/4AA4-7673ENW.pdf>. */
+#ifdef __hpux
+# undef UINT_LEAST8_MAX
+# undef UINT_LEAST16_MAX
+# define UINT_LEAST8_MAX 255
+# define UINT_LEAST16_MAX 65535
+#endif
+
+#if defined __UINT_LEAST8_MAX__ && __UINT_LEAST8_MAX__ <= __INT_MAX__
+typedef __UINT_LEAST8_TYPE__ yytype_uint8;
+#elif (!defined __UINT_LEAST8_MAX__ && defined YY_STDINT_H \
+ && UINT_LEAST8_MAX <= INT_MAX)
+typedef uint_least8_t yytype_uint8;
+#elif !defined __UINT_LEAST8_MAX__ && UCHAR_MAX <= INT_MAX
+typedef unsigned char yytype_uint8;
+#else
+typedef short yytype_uint8;
+#endif
+
+#if defined __UINT_LEAST16_MAX__ && __UINT_LEAST16_MAX__ <= __INT_MAX__
+typedef __UINT_LEAST16_TYPE__ yytype_uint16;
+#elif (!defined __UINT_LEAST16_MAX__ && defined YY_STDINT_H \
+ && UINT_LEAST16_MAX <= INT_MAX)
+typedef uint_least16_t yytype_uint16;
+#elif !defined __UINT_LEAST16_MAX__ && USHRT_MAX <= INT_MAX
+typedef unsigned short yytype_uint16;
+#else
+typedef int yytype_uint16;
+#endif
+
+#ifndef YYPTRDIFF_T
+# if defined __PTRDIFF_TYPE__ && defined __PTRDIFF_MAX__
+# define YYPTRDIFF_T __PTRDIFF_TYPE__
+# define YYPTRDIFF_MAXIMUM __PTRDIFF_MAX__
+# elif defined PTRDIFF_MAX
+# ifndef ptrdiff_t
+# include <stddef.h> /* INFRINGES ON USER NAME SPACE */
+# endif
+# define YYPTRDIFF_T ptrdiff_t
+# define YYPTRDIFF_MAXIMUM PTRDIFF_MAX
+# else
+# define YYPTRDIFF_T long
+# define YYPTRDIFF_MAXIMUM LONG_MAX
+# endif
+#endif
+
+#ifndef YYSIZE_T
+# ifdef __SIZE_TYPE__
+# define YYSIZE_T __SIZE_TYPE__
+# elif defined size_t
+# define YYSIZE_T size_t
+# elif defined __STDC_VERSION__ && 199901 <= __STDC_VERSION__
+# include <stddef.h> /* INFRINGES ON USER NAME SPACE */
+# define YYSIZE_T size_t
+# else
+# define YYSIZE_T unsigned
+# endif
+#endif
+
+#define YYSIZE_MAXIMUM \
+ YY_CAST (YYPTRDIFF_T, \
+ (YYPTRDIFF_MAXIMUM < YY_CAST (YYSIZE_T, -1) \
+ ? YYPTRDIFF_MAXIMUM \
+ : YY_CAST (YYSIZE_T, -1)))
+
+#define YYSIZEOF(X) YY_CAST (YYPTRDIFF_T, sizeof (X))
+
+
+/* Stored state numbers (used for stacks). */
+typedef yytype_int8 yy_state_t;
+
+/* State numbers in computations. */
+typedef int yy_state_fast_t;
+
+#ifndef YY_
+# if defined YYENABLE_NLS && YYENABLE_NLS
+# if ENABLE_NLS
+# include <libintl.h> /* INFRINGES ON USER NAME SPACE */
+# define YY_(Msgid) dgettext ("bison-runtime", Msgid)
+# endif
+# endif
+# ifndef YY_
+# define YY_(Msgid) Msgid
+# endif
+#endif
+
+
+#ifndef YY_ATTRIBUTE_PURE
+# if defined __GNUC__ && 2 < __GNUC__ + (96 <= __GNUC_MINOR__)
+# define YY_ATTRIBUTE_PURE __attribute__ ((__pure__))
+# else
+# define YY_ATTRIBUTE_PURE
+# endif
+#endif
+
+#ifndef YY_ATTRIBUTE_UNUSED
+# if defined __GNUC__ && 2 < __GNUC__ + (7 <= __GNUC_MINOR__)
+# define YY_ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+# else
+# define YY_ATTRIBUTE_UNUSED
+# endif
+#endif
+
+/* Suppress unused-variable warnings by "using" E. */
+#if ! defined lint || defined __GNUC__
+# define YY_USE(E) ((void) (E))
+#else
+# define YY_USE(E) /* empty */
+#endif
+
+/* Suppress an incorrect diagnostic about yylval being uninitialized. */
+#if defined __GNUC__ && ! defined __ICC && 406 <= __GNUC__ * 100 + __GNUC_MINOR__
+# if __GNUC__ * 100 + __GNUC_MINOR__ < 407
+# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN \
+ _Pragma ("GCC diagnostic push") \
+ _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"")
+# else
+# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN \
+ _Pragma ("GCC diagnostic push") \
+ _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"") \
+ _Pragma ("GCC diagnostic ignored \"-Wmaybe-uninitialized\"")
+# endif
+# define YY_IGNORE_MAYBE_UNINITIALIZED_END \
+ _Pragma ("GCC diagnostic pop")
+#else
+# define YY_INITIAL_VALUE(Value) Value
+#endif
+#ifndef YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+# define YY_IGNORE_MAYBE_UNINITIALIZED_END
+#endif
+#ifndef YY_INITIAL_VALUE
+# define YY_INITIAL_VALUE(Value) /* Nothing. */
+#endif
+
+#if defined __cplusplus && defined __GNUC__ && ! defined __ICC && 6 <= __GNUC__
+# define YY_IGNORE_USELESS_CAST_BEGIN \
+ _Pragma ("GCC diagnostic push") \
+ _Pragma ("GCC diagnostic ignored \"-Wuseless-cast\"")
+# define YY_IGNORE_USELESS_CAST_END \
+ _Pragma ("GCC diagnostic pop")
+#endif
+#ifndef YY_IGNORE_USELESS_CAST_BEGIN
+# define YY_IGNORE_USELESS_CAST_BEGIN
+# define YY_IGNORE_USELESS_CAST_END
+#endif
+
+
+#define YY_ASSERT(E) ((void) (0 && (E)))
+
+#if !defined yyoverflow
+
+/* The parser invokes alloca or malloc; define the necessary symbols. */
+
+# ifdef YYSTACK_USE_ALLOCA
+# if YYSTACK_USE_ALLOCA
+# ifdef __GNUC__
+# define YYSTACK_ALLOC __builtin_alloca
+# elif defined __BUILTIN_VA_ARG_INCR
+# include <alloca.h> /* INFRINGES ON USER NAME SPACE */
+# elif defined _AIX
+# define YYSTACK_ALLOC __alloca
+# elif defined _MSC_VER
+# include <malloc.h> /* INFRINGES ON USER NAME SPACE */
+# define alloca _alloca
+# else
+# define YYSTACK_ALLOC alloca
+# if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS
+# include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
+ /* Use EXIT_SUCCESS as a witness for stdlib.h. */
+# ifndef EXIT_SUCCESS
+# define EXIT_SUCCESS 0
+# endif
+# endif
+# endif
+# endif
+# endif
+
+# ifdef YYSTACK_ALLOC
+ /* Pacify GCC's 'empty if-body' warning. */
+# define YYSTACK_FREE(Ptr) do { /* empty */; } while (0)
+# ifndef YYSTACK_ALLOC_MAXIMUM
+ /* The OS might guarantee only one guard page at the bottom of the stack,
+ and a page size can be as small as 4096 bytes. So we cannot safely
+ invoke alloca (N) if N exceeds 4096. Use a slightly smaller number
+ to allow for a few compiler-allocated temporary stack slots. */
+# define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
+# endif
+# else
+# define YYSTACK_ALLOC YYMALLOC
+# define YYSTACK_FREE YYFREE
+# ifndef YYSTACK_ALLOC_MAXIMUM
+# define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
+# endif
+# if (defined __cplusplus && ! defined EXIT_SUCCESS \
+ && ! ((defined YYMALLOC || defined malloc) \
+ && (defined YYFREE || defined free)))
+# include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
+# ifndef EXIT_SUCCESS
+# define EXIT_SUCCESS 0
+# endif
+# endif
+# ifndef YYMALLOC
+# define YYMALLOC malloc
+# if ! defined malloc && ! defined EXIT_SUCCESS
+void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
+# endif
+# endif
+# ifndef YYFREE
+# define YYFREE free
+# if ! defined free && ! defined EXIT_SUCCESS
+void free (void *); /* INFRINGES ON USER NAME SPACE */
+# endif
+# endif
+# endif
+#endif /* !defined yyoverflow */
+
+#if (! defined yyoverflow \
+ && (! defined __cplusplus \
+ || (defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
+
+/* A type that is properly aligned for any stack member. */
+union yyalloc
+{
+ yy_state_t yyss_alloc;
+ YYSTYPE yyvs_alloc;
+};
+
+/* The size of the maximum gap between one aligned stack and the next. */
+# define YYSTACK_GAP_MAXIMUM (YYSIZEOF (union yyalloc) - 1)
+
+/* The size of an array large to enough to hold all stacks, each with
+ N elements. */
+# define YYSTACK_BYTES(N) \
+ ((N) * (YYSIZEOF (yy_state_t) + YYSIZEOF (YYSTYPE)) \
+ + YYSTACK_GAP_MAXIMUM)
+
+# define YYCOPY_NEEDED 1
+
+/* Relocate STACK from its old location to the new one. The
+ local variables YYSIZE and YYSTACKSIZE give the old and new number of
+ elements in the stack, and YYPTR gives the new location of the
+ stack. Advance YYPTR to a properly aligned location for the next
+ stack. */
+# define YYSTACK_RELOCATE(Stack_alloc, Stack) \
+ do \
+ { \
+ YYPTRDIFF_T yynewbytes; \
+ YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \
+ Stack = &yyptr->Stack_alloc; \
+ yynewbytes = yystacksize * YYSIZEOF (*Stack) + YYSTACK_GAP_MAXIMUM; \
+ yyptr += yynewbytes / YYSIZEOF (*yyptr); \
+ } \
+ while (0)
+
+#endif
+
+#if defined YYCOPY_NEEDED && YYCOPY_NEEDED
+/* Copy COUNT objects from SRC to DST. The source and destination do
+ not overlap. */
+# ifndef YYCOPY
+# if defined __GNUC__ && 1 < __GNUC__
+# define YYCOPY(Dst, Src, Count) \
+ __builtin_memcpy (Dst, Src, YY_CAST (YYSIZE_T, (Count)) * sizeof (*(Src)))
+# else
+# define YYCOPY(Dst, Src, Count) \
+ do \
+ { \
+ YYPTRDIFF_T yyi; \
+ for (yyi = 0; yyi < (Count); yyi++) \
+ (Dst)[yyi] = (Src)[yyi]; \
+ } \
+ while (0)
+# endif
+# endif
+#endif /* !YYCOPY_NEEDED */
+
+/* YYFINAL -- State number of the termination state. */
+#define YYFINAL 21
+/* YYLAST -- Last index in YYTABLE. */
+#define YYLAST 39
+
+/* YYNTOKENS -- Number of terminals. */
+#define YYNTOKENS 21
+/* YYNNTS -- Number of nonterminals. */
+#define YYNNTS 12
+/* YYNRULES -- Number of rules. */
+#define YYNRULES 34
+/* YYNSTATES -- Number of states. */
+#define YYNSTATES 49
+
+/* YYMAXUTOK -- Last valid token kind. */
+#define YYMAXUTOK 260
+
+
+/* YYTRANSLATE(TOKEN-NUM) -- Symbol number corresponding to TOKEN-NUM
+ as returned by yylex, with out-of-bounds checking. */
+#define YYTRANSLATE(YYX) \
+ (0 <= (YYX) && (YYX) <= YYMAXUTOK \
+ ? YY_CAST (yysymbol_kind_t, yytranslate[YYX]) \
+ : YYSYMBOL_YYUNDEF)
+
+/* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM
+ as returned by yylex. */
+static const yytype_int8 yytranslate[] =
+{
+ 0, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 12, 9, 2,
+ 17, 18, 16, 14, 2, 15, 13, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 7, 2,
+ 19, 2, 20, 6, 11, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 8, 2, 10, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 1, 2, 3, 4,
+ 5
+};
+
+#if YYDEBUG
+/* YYRLINE[YYN] -- Source line where rule number YYN was defined. */
+static const yytype_int16 yyrline[] =
+{
+ 0, 246, 246, 251, 253, 259, 260, 265, 267, 269,
+ 274, 276, 281, 283, 288, 290, 295, 297, 299, 315,
+ 319, 350, 352, 354, 356, 358, 364, 365, 370, 372,
+ 377, 379, 386, 387, 389
+};
+#endif
+
+/** Accessing symbol of state STATE. */
+#define YY_ACCESSING_SYMBOL(State) YY_CAST (yysymbol_kind_t, yystos[State])
+
+#if YYDEBUG || 0
+/* The user-facing name of the symbol whose (internal) number is
+ YYSYMBOL. No bounds checking. */
+static const char *yysymbol_name (yysymbol_kind_t yysymbol) YY_ATTRIBUTE_UNUSED;
+
+/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
+ First, the terminals, then, starting at YYNTOKENS, nonterminals. */
+static const char *const yytname[] =
+{
+ "\"end of file\"", "error", "\"invalid token\"", "TOKEN_LETTER",
+ "TOKEN_LITERAL", "TOKEN_DIGIT", "'?'", "':'", "'|'", "'&'", "'~'", "'@'",
+ "'%'", "'.'", "'+'", "'-'", "'*'", "'('", "')'", "'<'", "'>'", "$accept",
+ "expr", "conditional", "optional_conditional", "alternative", "list",
+ "substitute", "string", "optional_number", "number", "digits", "flag", YY_NULLPTR
+};
+
+static const char *
+yysymbol_name (yysymbol_kind_t yysymbol)
+{
+ return yytname[yysymbol];
+}
+#endif
+
+#define YYPACT_NINF (-26)
+
+#define yypact_value_is_default(Yyn) \
+ ((Yyn) == YYPACT_NINF)
+
+#define YYTABLE_NINF (-1)
+
+#define yytable_value_is_error(Yyn) \
+ 0
+
+/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
+ STATE-NUM. */
+static const yytype_int8 yypact[] =
+{
+ 2, 11, -26, -26, 12, 2, 2, 24, -26, -26,
+ 21, 2, 18, -6, -26, 26, -26, -26, 27, 15,
+ 14, -26, 2, 2, 2, 18, 2, -3, 11, 11,
+ -26, -26, -26, -26, -26, 28, 2, 2, -6, -26,
+ -26, 33, 26, 26, 2, 11, -26, -26, 26
+};
+
+/* YYDEFACT[STATE-NUM] -- Default reduction number in state STATE-NUM.
+ Performed when YYTABLE does not specify something else to do. Zero
+ means the default is an error. */
+static const yytype_int8 yydefact[] =
+{
+ 5, 16, 15, 14, 0, 5, 5, 0, 6, 2,
+ 3, 7, 10, 12, 28, 17, 18, 30, 19, 0,
+ 0, 1, 5, 0, 0, 11, 0, 32, 0, 0,
+ 23, 29, 31, 24, 25, 0, 8, 9, 13, 33,
+ 34, 0, 21, 22, 0, 26, 4, 20, 27
+};
+
+/* YYPGOTO[NTERM-NUM]. */
+static const yytype_int8 yypgoto[] =
+{
+ -26, -26, -7, -4, -26, -1, -11, 13, -26, -25,
+ -26, -26
+};
+
+/* YYDEFGOTO[NTERM-NUM]. */
+static const yytype_int8 yydefgoto[] =
+{
+ 0, 7, 8, 9, 10, 11, 12, 13, 47, 15,
+ 18, 41
+};
+
+/* YYTABLE[YYPACT[STATE-NUM]] -- What to do in state STATE-NUM. If
+ positive, shift that token. If negative, reduce the rule whose
+ number is the opposite. If YYTABLE_NINF, syntax error. */
+static const yytype_int8 yytable[] =
+{
+ 25, 19, 20, 42, 43, 1, 2, 27, 28, 29,
+ 30, 39, 40, 3, 4, 16, 14, 17, 35, 5,
+ 48, 6, 36, 37, 21, 25, 25, 22, 26, 23,
+ 24, 31, 32, 33, 34, 44, 45, 46, 0, 38
+};
+
+static const yytype_int8 yycheck[] =
+{
+ 11, 5, 6, 28, 29, 3, 4, 13, 14, 15,
+ 16, 14, 15, 11, 12, 3, 5, 5, 22, 17,
+ 45, 19, 23, 24, 0, 36, 37, 6, 10, 8,
+ 9, 5, 5, 18, 20, 7, 3, 44, -1, 26
+};
+
+/* YYSTOS[STATE-NUM] -- The symbol kind of the accessing symbol of
+ state STATE-NUM. */
+static const yytype_int8 yystos[] =
+{
+ 0, 3, 4, 11, 12, 17, 19, 22, 23, 24,
+ 25, 26, 27, 28, 5, 30, 3, 5, 31, 24,
+ 24, 0, 6, 8, 9, 27, 10, 13, 14, 15,
+ 16, 5, 5, 18, 20, 24, 26, 26, 28, 14,
+ 15, 32, 30, 30, 7, 3, 23, 29, 30
+};
+
+/* YYR1[RULE-NUM] -- Symbol kind of the left-hand side of rule RULE-NUM. */
+static const yytype_int8 yyr1[] =
+{
+ 0, 21, 22, 23, 23, 24, 24, 25, 25, 25,
+ 26, 26, 27, 27, 28, 28, 28, 28, 28, 28,
+ 28, 28, 28, 28, 28, 28, 29, 29, 30, 30,
+ 31, 31, 32, 32, 32
+};
+
+/* YYR2[RULE-NUM] -- Number of symbols on the right-hand side of rule RULE-NUM. */
+static const yytype_int8 yyr2[] =
+{
+ 0, 2, 1, 1, 5, 0, 1, 1, 3, 3,
+ 1, 2, 1, 3, 1, 1, 1, 2, 2, 2,
+ 5, 3, 3, 2, 3, 3, 0, 1, 1, 2,
+ 1, 2, 0, 1, 1
+};
+
+
+enum { YYENOMEM = -2 };
+
+#define yyerrok (yyerrstatus = 0)
+#define yyclearin (yychar = YYEMPTY)
+
+#define YYACCEPT goto yyacceptlab
+#define YYABORT goto yyabortlab
+#define YYERROR goto yyerrorlab
+#define YYNOMEM goto yyexhaustedlab
+
+
+#define YYRECOVERING() (!!yyerrstatus)
+
+#define YYBACKUP(Token, Value) \
+ do \
+ if (yychar == YYEMPTY) \
+ { \
+ yychar = (Token); \
+ yylval = (Value); \
+ YYPOPSTACK (yylen); \
+ yystate = *yyssp; \
+ goto yybackup; \
+ } \
+ else \
+ { \
+ yyerror (YY_("syntax error: cannot back up")); \
+ YYERROR; \
+ } \
+ while (0)
+
+/* Backward compatibility with an undocumented macro.
+ Use YYerror or YYUNDEF. */
+#define YYERRCODE YYUNDEF
+
+
+/* Enable debugging if requested. */
+#if YYDEBUG
+
+# ifndef YYFPRINTF
+# include <stdio.h> /* INFRINGES ON USER NAME SPACE */
+# define YYFPRINTF fprintf
+# endif
+
+# define YYDPRINTF(Args) \
+do { \
+ if (yydebug) \
+ YYFPRINTF Args; \
+} while (0)
+
+
+
+
+# define YY_SYMBOL_PRINT(Title, Kind, Value, Location) \
+do { \
+ if (yydebug) \
+ { \
+ YYFPRINTF (stderr, "%s ", Title); \
+ yy_symbol_print (stderr, \
+ Kind, Value); \
+ YYFPRINTF (stderr, "\n"); \
+ } \
+} while (0)
+
+
+/*-----------------------------------.
+| Print this symbol's value on YYO. |
+`-----------------------------------*/
+
+static void
+yy_symbol_value_print (FILE *yyo,
+ yysymbol_kind_t yykind, YYSTYPE const * const yyvaluep)
+{
+ FILE *yyoutput = yyo;
+ YY_USE (yyoutput);
+ if (!yyvaluep)
+ return;
+ YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+ YY_USE (yykind);
+ YY_IGNORE_MAYBE_UNINITIALIZED_END
+}
+
+
+/*---------------------------.
+| Print this symbol on YYO. |
+`---------------------------*/
+
+static void
+yy_symbol_print (FILE *yyo,
+ yysymbol_kind_t yykind, YYSTYPE const * const yyvaluep)
+{
+ YYFPRINTF (yyo, "%s %s (",
+ yykind < YYNTOKENS ? "token" : "nterm", yysymbol_name (yykind));
+
+ yy_symbol_value_print (yyo, yykind, yyvaluep);
+ YYFPRINTF (yyo, ")");
+}
+
+/*------------------------------------------------------------------.
+| yy_stack_print -- Print the state stack from its BOTTOM up to its |
+| TOP (included). |
+`------------------------------------------------------------------*/
+
+static void
+yy_stack_print (yy_state_t *yybottom, yy_state_t *yytop)
+{
+ YYFPRINTF (stderr, "Stack now");
+ for (; yybottom <= yytop; yybottom++)
+ {
+ int yybot = *yybottom;
+ YYFPRINTF (stderr, " %d", yybot);
+ }
+ YYFPRINTF (stderr, "\n");
+}
+
+# define YY_STACK_PRINT(Bottom, Top) \
+do { \
+ if (yydebug) \
+ yy_stack_print ((Bottom), (Top)); \
+} while (0)
+
+
+/*------------------------------------------------.
+| Report that the YYRULE is going to be reduced. |
+`------------------------------------------------*/
+
+static void
+yy_reduce_print (yy_state_t *yyssp, YYSTYPE *yyvsp,
+ int yyrule)
+{
+ int yylno = yyrline[yyrule];
+ int yynrhs = yyr2[yyrule];
+ int yyi;
+ YYFPRINTF (stderr, "Reducing stack by rule %d (line %d):\n",
+ yyrule - 1, yylno);
+ /* The symbols being reduced. */
+ for (yyi = 0; yyi < yynrhs; yyi++)
+ {
+ YYFPRINTF (stderr, " $%d = ", yyi + 1);
+ yy_symbol_print (stderr,
+ YY_ACCESSING_SYMBOL (+yyssp[yyi + 1 - yynrhs]),
+ &yyvsp[(yyi + 1) - (yynrhs)]);
+ YYFPRINTF (stderr, "\n");
+ }
+}
+
+# define YY_REDUCE_PRINT(Rule) \
+do { \
+ if (yydebug) \
+ yy_reduce_print (yyssp, yyvsp, Rule); \
+} while (0)
+
+/* Nonzero means print parse trace. It is left uninitialized so that
+ multiple parsers can coexist. */
+int yydebug;
+#else /* !YYDEBUG */
+# define YYDPRINTF(Args) ((void) 0)
+# define YY_SYMBOL_PRINT(Title, Kind, Value, Location)
+# define YY_STACK_PRINT(Bottom, Top)
+# define YY_REDUCE_PRINT(Rule)
+#endif /* !YYDEBUG */
+
+
+/* YYINITDEPTH -- initial size of the parser's stacks. */
+#ifndef YYINITDEPTH
+# define YYINITDEPTH 200
+#endif
+
+/* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
+ if the built-in stack extension method is used).
+
+ Do not make this value too large; the results are undefined if
+ YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
+ evaluated with infinite-precision integer arithmetic. */
+
+#ifndef YYMAXDEPTH
+# define YYMAXDEPTH 10000
+#endif
+
+
+
+
+
+
+/*-----------------------------------------------.
+| Release the memory associated to this symbol. |
+`-----------------------------------------------*/
+
+static void
+yydestruct (const char *yymsg,
+ yysymbol_kind_t yykind, YYSTYPE *yyvaluep)
+{
+ YY_USE (yyvaluep);
+ if (!yymsg)
+ yymsg = "Deleting";
+ YY_SYMBOL_PRINT (yymsg, yykind, yyvaluep, yylocationp);
+
+ YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+ YY_USE (yykind);
+ YY_IGNORE_MAYBE_UNINITIALIZED_END
+}
+
+
+/* Lookahead token kind. */
+int yychar;
+
+/* The semantic value of the lookahead symbol. */
+YYSTYPE yylval;
+/* Number of syntax errors so far. */
+int yynerrs;
+
+
+
+
+/*----------.
+| yyparse. |
+`----------*/
+
+int
+yyparse (void)
+{
+ yy_state_fast_t yystate = 0;
+ /* Number of tokens to shift before error messages enabled. */
+ int yyerrstatus = 0;
+
+ /* Refer to the stacks through separate pointers, to allow yyoverflow
+ to reallocate them elsewhere. */
+
+ /* Their size. */
+ YYPTRDIFF_T yystacksize = YYINITDEPTH;
+
+ /* The state stack: array, bottom, top. */
+ yy_state_t yyssa[YYINITDEPTH];
+ yy_state_t *yyss = yyssa;
+ yy_state_t *yyssp = yyss;
+
+ /* The semantic value stack: array, bottom, top. */
+ YYSTYPE yyvsa[YYINITDEPTH];
+ YYSTYPE *yyvs = yyvsa;
+ YYSTYPE *yyvsp = yyvs;
+
+ int yyn;
+ /* The return value of yyparse. */
+ int yyresult;
+ /* Lookahead symbol kind. */
+ yysymbol_kind_t yytoken = YYSYMBOL_YYEMPTY;
+ /* The variables used to return semantic value and location from the
+ action routines. */
+ YYSTYPE yyval;
+
+
+
+#define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N))
+
+ /* The number of symbols on the RHS of the reduced rule.
+ Keep to zero when no symbol should be popped. */
+ int yylen = 0;
+
+ YYDPRINTF ((stderr, "Starting parse\n"));
+
+ yychar = YYEMPTY; /* Cause a token to be read. */
+
+ goto yysetstate;
+
+
+/*------------------------------------------------------------.
+| yynewstate -- push a new state, which is found in yystate. |
+`------------------------------------------------------------*/
+yynewstate:
+ /* In all cases, when you get here, the value and location stacks
+ have just been pushed. So pushing a state here evens the stacks. */
+ yyssp++;
+
+
+/*--------------------------------------------------------------------.
+| yysetstate -- set current state (the top of the stack) to yystate. |
+`--------------------------------------------------------------------*/
+yysetstate:
+ YYDPRINTF ((stderr, "Entering state %d\n", yystate));
+ YY_ASSERT (0 <= yystate && yystate < YYNSTATES);
+ YY_IGNORE_USELESS_CAST_BEGIN
+ *yyssp = YY_CAST (yy_state_t, yystate);
+ YY_IGNORE_USELESS_CAST_END
+ YY_STACK_PRINT (yyss, yyssp);
+
+ if (yyss + yystacksize - 1 <= yyssp)
+#if !defined yyoverflow && !defined YYSTACK_RELOCATE
+ YYNOMEM;
+#else
+ {
+ /* Get the current used size of the three stacks, in elements. */
+ YYPTRDIFF_T yysize = yyssp - yyss + 1;
+
+# if defined yyoverflow
+ {
+ /* Give user a chance to reallocate the stack. Use copies of
+ these so that the &'s don't force the real ones into
+ memory. */
+ yy_state_t *yyss1 = yyss;
+ YYSTYPE *yyvs1 = yyvs;
+
+ /* Each stack pointer address is followed by the size of the
+ data in use in that stack, in bytes. This used to be a
+ conditional around just the two extra args, but that might
+ be undefined if yyoverflow is a macro. */
+ yyoverflow (YY_("memory exhausted"),
+ &yyss1, yysize * YYSIZEOF (*yyssp),
+ &yyvs1, yysize * YYSIZEOF (*yyvsp),
+ &yystacksize);
+ yyss = yyss1;
+ yyvs = yyvs1;
+ }
+# else /* defined YYSTACK_RELOCATE */
+ /* Extend the stack our own way. */
+ if (YYMAXDEPTH <= yystacksize)
+ YYNOMEM;
+ yystacksize *= 2;
+ if (YYMAXDEPTH < yystacksize)
+ yystacksize = YYMAXDEPTH;
+
+ {
+ yy_state_t *yyss1 = yyss;
+ union yyalloc *yyptr =
+ YY_CAST (union yyalloc *,
+ YYSTACK_ALLOC (YY_CAST (YYSIZE_T, YYSTACK_BYTES (yystacksize))));
+ if (! yyptr)
+ YYNOMEM;
+ YYSTACK_RELOCATE (yyss_alloc, yyss);
+ YYSTACK_RELOCATE (yyvs_alloc, yyvs);
+# undef YYSTACK_RELOCATE
+ if (yyss1 != yyssa)
+ YYSTACK_FREE (yyss1);
+ }
+# endif
+
+ yyssp = yyss + yysize - 1;
+ yyvsp = yyvs + yysize - 1;
+
+ YY_IGNORE_USELESS_CAST_BEGIN
+ YYDPRINTF ((stderr, "Stack size increased to %ld\n",
+ YY_CAST (long, yystacksize)));
+ YY_IGNORE_USELESS_CAST_END
+
+ if (yyss + yystacksize - 1 <= yyssp)
+ YYABORT;
+ }
+#endif /* !defined yyoverflow && !defined YYSTACK_RELOCATE */
+
+
+ if (yystate == YYFINAL)
+ YYACCEPT;
+
+ goto yybackup;
+
+
+/*-----------.
+| yybackup. |
+`-----------*/
+yybackup:
+ /* Do appropriate processing given the current state. Read a
+ lookahead token if we need one and don't already have one. */
+
+ /* First try to decide what to do without reference to lookahead token. */
+ yyn = yypact[yystate];
+ if (yypact_value_is_default (yyn))
+ goto yydefault;
+
+ /* Not known => get a lookahead token if don't already have one. */
+
+ /* YYCHAR is either empty, or end-of-input, or a valid lookahead. */
+ if (yychar == YYEMPTY)
+ {
+ YYDPRINTF ((stderr, "Reading a token\n"));
+ yychar = yylex ();
+ }
+
+ if (yychar <= YYEOF)
+ {
+ yychar = YYEOF;
+ yytoken = YYSYMBOL_YYEOF;
+ YYDPRINTF ((stderr, "Now at end of input.\n"));
+ }
+ else if (yychar == YYerror)
+ {
+ /* The scanner already issued an error message, process directly
+ to error recovery. But do not keep the error token as
+ lookahead, it is too special and may lead us to an endless
+ loop in error recovery. */
+ yychar = YYUNDEF;
+ yytoken = YYSYMBOL_YYerror;
+ goto yyerrlab1;
+ }
+ else
+ {
+ yytoken = YYTRANSLATE (yychar);
+ YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
+ }
+
+ /* If the proper action on seeing token YYTOKEN is to reduce or to
+ detect an error, take that action. */
+ yyn += yytoken;
+ if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
+ goto yydefault;
+ yyn = yytable[yyn];
+ if (yyn <= 0)
+ {
+ if (yytable_value_is_error (yyn))
+ goto yyerrlab;
+ yyn = -yyn;
+ goto yyreduce;
+ }
+
+ /* Count tokens shifted since error; after three, turn off error
+ status. */
+ if (yyerrstatus)
+ yyerrstatus--;
+
+ /* Shift the lookahead token. */
+ YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
+ yystate = yyn;
+ YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+ *++yyvsp = yylval;
+ YY_IGNORE_MAYBE_UNINITIALIZED_END
+
+ /* Discard the shifted token. */
+ yychar = YYEMPTY;
+ goto yynewstate;
+
+
+/*-----------------------------------------------------------.
+| yydefault -- do the default action for the current state. |
+`-----------------------------------------------------------*/
+yydefault:
+ yyn = yydefact[yystate];
+ if (yyn == 0)
+ goto yyerrlab;
+ goto yyreduce;
+
+
+/*-----------------------------.
+| yyreduce -- do a reduction. |
+`-----------------------------*/
+yyreduce:
+ /* yyn is the number of a rule to reduce with. */
+ yylen = yyr2[yyn];
+
+ /* If YYLEN is nonzero, implement the default value of the action:
+ '$$ = $1'.
+
+ Otherwise, the following line sets YYVAL to garbage.
+ This behavior is undocumented and Bison
+ users should not rely upon it. Assigning to YYVAL
+ unconditionally makes the parser a bit smaller, and it avoids a
+ GCC warning that YYVAL may be used uninitialized. */
+ yyval = yyvsp[1-yylen];
+
+
+ YY_REDUCE_PRINT (yyn);
+ switch (yyn)
+ {
+ case 2: /* expr: optional_conditional */
+#line 247 "../src/preproc/refer/label.ypp"
+ { parse_result = ((yyvsp[0].expr) ? new analyzed_expr((yyvsp[0].expr)) : 0); }
+#line 1370 "src/preproc/refer/label.cpp"
+ break;
+
+ case 3: /* conditional: alternative */
+#line 252 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = (yyvsp[0].expr); }
+#line 1376 "src/preproc/refer/label.cpp"
+ break;
+
+ case 4: /* conditional: alternative '?' optional_conditional ':' conditional */
+#line 254 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = new conditional_expr((yyvsp[-4].expr), (yyvsp[-2].expr), (yyvsp[0].expr)); }
+#line 1382 "src/preproc/refer/label.cpp"
+ break;
+
+ case 5: /* optional_conditional: %empty */
+#line 259 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = 0; }
+#line 1388 "src/preproc/refer/label.cpp"
+ break;
+
+ case 6: /* optional_conditional: conditional */
+#line 261 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = (yyvsp[0].expr); }
+#line 1394 "src/preproc/refer/label.cpp"
+ break;
+
+ case 7: /* alternative: list */
+#line 266 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = (yyvsp[0].expr); }
+#line 1400 "src/preproc/refer/label.cpp"
+ break;
+
+ case 8: /* alternative: alternative '|' list */
+#line 268 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = new alternative_expr((yyvsp[-2].expr), (yyvsp[0].expr)); }
+#line 1406 "src/preproc/refer/label.cpp"
+ break;
+
+ case 9: /* alternative: alternative '&' list */
+#line 270 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = new conditional_expr((yyvsp[-2].expr), (yyvsp[0].expr), 0); }
+#line 1412 "src/preproc/refer/label.cpp"
+ break;
+
+ case 10: /* list: substitute */
+#line 275 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = (yyvsp[0].expr); }
+#line 1418 "src/preproc/refer/label.cpp"
+ break;
+
+ case 11: /* list: list substitute */
+#line 277 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = new list_expr((yyvsp[-1].expr), (yyvsp[0].expr)); }
+#line 1424 "src/preproc/refer/label.cpp"
+ break;
+
+ case 12: /* substitute: string */
+#line 282 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = (yyvsp[0].expr); }
+#line 1430 "src/preproc/refer/label.cpp"
+ break;
+
+ case 13: /* substitute: substitute '~' string */
+#line 284 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = new substitute_expr((yyvsp[-2].expr), (yyvsp[0].expr)); }
+#line 1436 "src/preproc/refer/label.cpp"
+ break;
+
+ case 14: /* string: '@' */
+#line 289 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = new at_expr; }
+#line 1442 "src/preproc/refer/label.cpp"
+ break;
+
+ case 15: /* string: TOKEN_LITERAL */
+#line 291 "../src/preproc/refer/label.ypp"
+ {
+ (yyval.expr) = new literal_expr(literals.contents() + (yyvsp[0].str).start,
+ (yyvsp[0].str).len);
+ }
+#line 1451 "src/preproc/refer/label.cpp"
+ break;
+
+ case 16: /* string: TOKEN_LETTER */
+#line 296 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = new field_expr((yyvsp[0].num), 0); }
+#line 1457 "src/preproc/refer/label.cpp"
+ break;
+
+ case 17: /* string: TOKEN_LETTER number */
+#line 298 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = new field_expr((yyvsp[-1].num), (yyvsp[0].num) - 1); }
+#line 1463 "src/preproc/refer/label.cpp"
+ break;
+
+ case 18: /* string: '%' TOKEN_LETTER */
+#line 300 "../src/preproc/refer/label.ypp"
+ {
+ switch ((yyvsp[0].num)) {
+ case 'I':
+ case 'i':
+ case 'A':
+ case 'a':
+ (yyval.expr) = new format_expr((yyvsp[0].num));
+ break;
+ default:
+ command_error("unrecognized format '%1'", char((yyvsp[0].num)));
+ (yyval.expr) = new format_expr('a');
+ break;
+ }
+ }
+#line 1482 "src/preproc/refer/label.cpp"
+ break;
+
+ case 19: /* string: '%' digits */
+#line 316 "../src/preproc/refer/label.ypp"
+ {
+ (yyval.expr) = new format_expr('0', (yyvsp[0].dig).ndigits, (yyvsp[0].dig).val);
+ }
+#line 1490 "src/preproc/refer/label.cpp"
+ break;
+
+ case 20: /* string: string '.' flag TOKEN_LETTER optional_number */
+#line 320 "../src/preproc/refer/label.ypp"
+ {
+ switch ((yyvsp[-1].num)) {
+ case 'l':
+ (yyval.expr) = new map_expr((yyvsp[-4].expr), lowercase);
+ break;
+ case 'u':
+ (yyval.expr) = new map_expr((yyvsp[-4].expr), uppercase);
+ break;
+ case 'c':
+ (yyval.expr) = new map_expr((yyvsp[-4].expr), capitalize);
+ break;
+ case 'r':
+ (yyval.expr) = new map_expr((yyvsp[-4].expr), reverse_name);
+ break;
+ case 'a':
+ (yyval.expr) = new map_expr((yyvsp[-4].expr), abbreviate_name);
+ break;
+ case 'y':
+ (yyval.expr) = new extractor_expr((yyvsp[-4].expr), find_year, (yyvsp[-2].num));
+ break;
+ case 'n':
+ (yyval.expr) = new extractor_expr((yyvsp[-4].expr), find_last_name, (yyvsp[-2].num));
+ break;
+ default:
+ (yyval.expr) = (yyvsp[-4].expr);
+ command_error("unknown function '%1'", char((yyvsp[-1].num)));
+ break;
+ }
+ }
+#line 1524 "src/preproc/refer/label.cpp"
+ break;
+
+ case 21: /* string: string '+' number */
+#line 351 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = new truncate_expr((yyvsp[-2].expr), (yyvsp[0].num)); }
+#line 1530 "src/preproc/refer/label.cpp"
+ break;
+
+ case 22: /* string: string '-' number */
+#line 353 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = new truncate_expr((yyvsp[-2].expr), -(yyvsp[0].num)); }
+#line 1536 "src/preproc/refer/label.cpp"
+ break;
+
+ case 23: /* string: string '*' */
+#line 355 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = new star_expr((yyvsp[-1].expr)); }
+#line 1542 "src/preproc/refer/label.cpp"
+ break;
+
+ case 24: /* string: '(' optional_conditional ')' */
+#line 357 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = (yyvsp[-1].expr); }
+#line 1548 "src/preproc/refer/label.cpp"
+ break;
+
+ case 25: /* string: '<' optional_conditional '>' */
+#line 359 "../src/preproc/refer/label.ypp"
+ { (yyval.expr) = new separator_expr((yyvsp[-1].expr)); }
+#line 1554 "src/preproc/refer/label.cpp"
+ break;
+
+ case 26: /* optional_number: %empty */
+#line 364 "../src/preproc/refer/label.ypp"
+ { (yyval.num) = -1; }
+#line 1560 "src/preproc/refer/label.cpp"
+ break;
+
+ case 27: /* optional_number: number */
+#line 366 "../src/preproc/refer/label.ypp"
+ { (yyval.num) = (yyvsp[0].num); }
+#line 1566 "src/preproc/refer/label.cpp"
+ break;
+
+ case 28: /* number: TOKEN_DIGIT */
+#line 371 "../src/preproc/refer/label.ypp"
+ { (yyval.num) = (yyvsp[0].num); }
+#line 1572 "src/preproc/refer/label.cpp"
+ break;
+
+ case 29: /* number: number TOKEN_DIGIT */
+#line 373 "../src/preproc/refer/label.ypp"
+ { (yyval.num) = (yyvsp[-1].num)*10 + (yyvsp[0].num); }
+#line 1578 "src/preproc/refer/label.cpp"
+ break;
+
+ case 30: /* digits: TOKEN_DIGIT */
+#line 378 "../src/preproc/refer/label.ypp"
+ { (yyval.dig).ndigits = 1; (yyval.dig).val = (yyvsp[0].num); }
+#line 1584 "src/preproc/refer/label.cpp"
+ break;
+
+ case 31: /* digits: digits TOKEN_DIGIT */
+#line 380 "../src/preproc/refer/label.ypp"
+ { (yyval.dig).ndigits = (yyvsp[-1].dig).ndigits + 1; (yyval.dig).val = (yyvsp[-1].dig).val*10 + (yyvsp[0].num); }
+#line 1590 "src/preproc/refer/label.cpp"
+ break;
+
+ case 32: /* flag: %empty */
+#line 386 "../src/preproc/refer/label.ypp"
+ { (yyval.num) = 0; }
+#line 1596 "src/preproc/refer/label.cpp"
+ break;
+
+ case 33: /* flag: '+' */
+#line 388 "../src/preproc/refer/label.ypp"
+ { (yyval.num) = 1; }
+#line 1602 "src/preproc/refer/label.cpp"
+ break;
+
+ case 34: /* flag: '-' */
+#line 390 "../src/preproc/refer/label.ypp"
+ { (yyval.num) = -1; }
+#line 1608 "src/preproc/refer/label.cpp"
+ break;
+
+
+#line 1612 "src/preproc/refer/label.cpp"
+
+ default: break;
+ }
+ /* User semantic actions sometimes alter yychar, and that requires
+ that yytoken be updated with the new translation. We take the
+ approach of translating immediately before every use of yytoken.
+ One alternative is translating here after every semantic action,
+ but that translation would be missed if the semantic action invokes
+ YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or
+ if it invokes YYBACKUP. In the case of YYABORT or YYACCEPT, an
+ incorrect destructor might then be invoked immediately. In the
+ case of YYERROR or YYBACKUP, subsequent parser actions might lead
+ to an incorrect destructor call or verbose syntax error message
+ before the lookahead is translated. */
+ YY_SYMBOL_PRINT ("-> $$ =", YY_CAST (yysymbol_kind_t, yyr1[yyn]), &yyval, &yyloc);
+
+ YYPOPSTACK (yylen);
+ yylen = 0;
+
+ *++yyvsp = yyval;
+
+ /* Now 'shift' the result of the reduction. Determine what state
+ that goes to, based on the state we popped back to and the rule
+ number reduced by. */
+ {
+ const int yylhs = yyr1[yyn] - YYNTOKENS;
+ const int yyi = yypgoto[yylhs] + *yyssp;
+ yystate = (0 <= yyi && yyi <= YYLAST && yycheck[yyi] == *yyssp
+ ? yytable[yyi]
+ : yydefgoto[yylhs]);
+ }
+
+ goto yynewstate;
+
+
+/*--------------------------------------.
+| yyerrlab -- here on detecting error. |
+`--------------------------------------*/
+yyerrlab:
+ /* Make sure we have latest lookahead translation. See comments at
+ user semantic actions for why this is necessary. */
+ yytoken = yychar == YYEMPTY ? YYSYMBOL_YYEMPTY : YYTRANSLATE (yychar);
+ /* If not already recovering from an error, report this error. */
+ if (!yyerrstatus)
+ {
+ ++yynerrs;
+ yyerror (YY_("syntax error"));
+ }
+
+ if (yyerrstatus == 3)
+ {
+ /* If just tried and failed to reuse lookahead token after an
+ error, discard it. */
+
+ if (yychar <= YYEOF)
+ {
+ /* Return failure if at end of input. */
+ if (yychar == YYEOF)
+ YYABORT;
+ }
+ else
+ {
+ yydestruct ("Error: discarding",
+ yytoken, &yylval);
+ yychar = YYEMPTY;
+ }
+ }
+
+ /* Else will try to reuse lookahead token after shifting the error
+ token. */
+ goto yyerrlab1;
+
+
+/*---------------------------------------------------.
+| yyerrorlab -- error raised explicitly by YYERROR. |
+`---------------------------------------------------*/
+yyerrorlab:
+ /* Pacify compilers when the user code never invokes YYERROR and the
+ label yyerrorlab therefore never appears in user code. */
+ if (0)
+ YYERROR;
+ ++yynerrs;
+
+ /* Do not reclaim the symbols of the rule whose action triggered
+ this YYERROR. */
+ YYPOPSTACK (yylen);
+ yylen = 0;
+ YY_STACK_PRINT (yyss, yyssp);
+ yystate = *yyssp;
+ goto yyerrlab1;
+
+
+/*-------------------------------------------------------------.
+| yyerrlab1 -- common code for both syntax error and YYERROR. |
+`-------------------------------------------------------------*/
+yyerrlab1:
+ yyerrstatus = 3; /* Each real token shifted decrements this. */
+
+ /* Pop stack until we find a state that shifts the error token. */
+ for (;;)
+ {
+ yyn = yypact[yystate];
+ if (!yypact_value_is_default (yyn))
+ {
+ yyn += YYSYMBOL_YYerror;
+ if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYSYMBOL_YYerror)
+ {
+ yyn = yytable[yyn];
+ if (0 < yyn)
+ break;
+ }
+ }
+
+ /* Pop the current state because it cannot handle the error token. */
+ if (yyssp == yyss)
+ YYABORT;
+
+
+ yydestruct ("Error: popping",
+ YY_ACCESSING_SYMBOL (yystate), yyvsp);
+ YYPOPSTACK (1);
+ yystate = *yyssp;
+ YY_STACK_PRINT (yyss, yyssp);
+ }
+
+ YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+ *++yyvsp = yylval;
+ YY_IGNORE_MAYBE_UNINITIALIZED_END
+
+
+ /* Shift the error token. */
+ YY_SYMBOL_PRINT ("Shifting", YY_ACCESSING_SYMBOL (yyn), yyvsp, yylsp);
+
+ yystate = yyn;
+ goto yynewstate;
+
+
+/*-------------------------------------.
+| yyacceptlab -- YYACCEPT comes here. |
+`-------------------------------------*/
+yyacceptlab:
+ yyresult = 0;
+ goto yyreturnlab;
+
+
+/*-----------------------------------.
+| yyabortlab -- YYABORT comes here. |
+`-----------------------------------*/
+yyabortlab:
+ yyresult = 1;
+ goto yyreturnlab;
+
+
+/*-----------------------------------------------------------.
+| yyexhaustedlab -- YYNOMEM (memory exhaustion) comes here. |
+`-----------------------------------------------------------*/
+yyexhaustedlab:
+ yyerror (YY_("memory exhausted"));
+ yyresult = 2;
+ goto yyreturnlab;
+
+
+/*----------------------------------------------------------.
+| yyreturnlab -- parsing is finished, clean up and return. |
+`----------------------------------------------------------*/
+yyreturnlab:
+ if (yychar != YYEMPTY)
+ {
+ /* Make sure we have latest lookahead translation. See comments at
+ user semantic actions for why this is necessary. */
+ yytoken = YYTRANSLATE (yychar);
+ yydestruct ("Cleanup: discarding lookahead",
+ yytoken, &yylval);
+ }
+ /* Do not reclaim the symbols of the rule whose action triggered
+ this YYABORT or YYACCEPT. */
+ YYPOPSTACK (yylen);
+ YY_STACK_PRINT (yyss, yyssp);
+ while (yyssp != yyss)
+ {
+ yydestruct ("Cleanup: popping",
+ YY_ACCESSING_SYMBOL (+*yyssp), yyvsp);
+ YYPOPSTACK (1);
+ }
+#ifndef yyoverflow
+ if (yyss != yyssa)
+ YYSTACK_FREE (yyss);
+#endif
+
+ return yyresult;
+}
+
+#line 393 "../src/preproc/refer/label.ypp"
+
+
+/* bison defines const to be empty unless __STDC__ is defined, which it
+isn't under cfront */
+
+#ifdef const
+#undef const
+#endif
+
+const char *spec_ptr;
+const char *spec_end;
+const char *spec_cur;
+
+static char uppercase_array[] = {
+ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
+ 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
+ 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
+ 'Y', 'Z',
+};
+
+static char lowercase_array[] = {
+ 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h',
+ 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p',
+ 'q', 'r', 's', 't', 'u', 'v', 'w', 'x',
+ 'y', 'z',
+};
+
+int yylex()
+{
+ while (spec_ptr < spec_end && csspace(*spec_ptr))
+ spec_ptr++;
+ spec_cur = spec_ptr;
+ if (spec_ptr >= spec_end)
+ return 0;
+ unsigned char c = *spec_ptr++;
+ if (csalpha(c)) {
+ yylval.num = c;
+ return TOKEN_LETTER;
+ }
+ if (csdigit(c)) {
+ yylval.num = c - '0';
+ return TOKEN_DIGIT;
+ }
+ if (c == '\'') {
+ yylval.str.start = literals.length();
+ for (; spec_ptr < spec_end; spec_ptr++) {
+ if (*spec_ptr == '\'') {
+ if (++spec_ptr < spec_end && *spec_ptr == '\'')
+ literals += '\'';
+ else {
+ yylval.str.len = literals.length() - yylval.str.start;
+ return TOKEN_LITERAL;
+ }
+ }
+ else
+ literals += *spec_ptr;
+ }
+ yylval.str.len = literals.length() - yylval.str.start;
+ return TOKEN_LITERAL;
+ }
+ return c;
+}
+
+int set_label_spec(const char *label_spec)
+{
+ spec_cur = spec_ptr = label_spec;
+ spec_end = strchr(label_spec, '\0');
+ literals.clear();
+ if (yyparse())
+ return 0;
+ delete parsed_label;
+ parsed_label = parse_result;
+ return 1;
+}
+
+int set_date_label_spec(const char *label_spec)
+{
+ spec_cur = spec_ptr = label_spec;
+ spec_end = strchr(label_spec, '\0');
+ literals.clear();
+ if (yyparse())
+ return 0;
+ delete parsed_date_label;
+ parsed_date_label = parse_result;
+ return 1;
+}
+
+int set_short_label_spec(const char *label_spec)
+{
+ spec_cur = spec_ptr = label_spec;
+ spec_end = strchr(label_spec, '\0');
+ literals.clear();
+ if (yyparse())
+ return 0;
+ delete parsed_short_label;
+ parsed_short_label = parse_result;
+ return 1;
+}
+
+void yyerror(const char *message)
+{
+ if (spec_cur < spec_end)
+ command_error("label specification %1 before '%2'", message, spec_cur);
+ else
+ command_error("label specification %1 at end of string",
+ message, spec_cur);
+}
+
+void at_expr::evaluate(int tentative, const reference &ref,
+ string &result, substring_position &)
+{
+ if (tentative)
+ ref.canonicalize_authors(result);
+ else {
+ const char *end, *start = ref.get_authors(&end);
+ if (start)
+ result.append(start, end - start);
+ }
+}
+
+void format_expr::evaluate(int tentative, const reference &ref,
+ string &result, substring_position &)
+{
+ if (tentative)
+ return;
+ const label_info *lp = ref.get_label_ptr();
+ int num = lp == 0 ? ref.get_number() : lp->count;
+ if (type != '0')
+ result += format_serial(type, num + 1);
+ else {
+ const char *ptr = i_to_a(num + first_number);
+ int pad = width - strlen(ptr);
+ while (--pad >= 0)
+ result += '0';
+ result += ptr;
+ }
+}
+
+static const char *format_serial(char c, int n)
+{
+ assert(n > 0);
+ static char buf[128]; // more than enough.
+ switch (c) {
+ case 'i':
+ case 'I':
+ {
+ char *p = buf;
+ // troff uses z and w to represent 10000 and 5000 in Roman
+ // numerals; I can find no historical basis for this usage
+ const char *s = c == 'i' ? "zwmdclxvi" : "ZWMDCLXVI";
+ if (n >= 40000)
+ return i_to_a(n);
+ while (n >= 10000) {
+ *p++ = s[0];
+ n -= 10000;
+ }
+ for (int i = 1000; i > 0; i /= 10, s += 2) {
+ int m = n/i;
+ n -= m*i;
+ switch (m) {
+ case 3:
+ *p++ = s[2];
+ /* falls through */
+ case 2:
+ *p++ = s[2];
+ /* falls through */
+ case 1:
+ *p++ = s[2];
+ break;
+ case 4:
+ *p++ = s[2];
+ *p++ = s[1];
+ break;
+ case 8:
+ *p++ = s[1];
+ *p++ = s[2];
+ *p++ = s[2];
+ *p++ = s[2];
+ break;
+ case 7:
+ *p++ = s[1];
+ *p++ = s[2];
+ *p++ = s[2];
+ break;
+ case 6:
+ *p++ = s[1];
+ *p++ = s[2];
+ break;
+ case 5:
+ *p++ = s[1];
+ break;
+ case 9:
+ *p++ = s[2];
+ *p++ = s[0];
+ }
+ }
+ *p = 0;
+ break;
+ }
+ case 'a':
+ case 'A':
+ {
+ char *p = buf;
+ // this is derived from troff/reg.c
+ while (n > 0) {
+ int d = n % 26;
+ if (d == 0)
+ d = 26;
+ n -= d;
+ n /= 26;
+ *p++ = c == 'a' ? lowercase_array[d - 1] :
+ uppercase_array[d - 1];
+ }
+ *p-- = 0;
+ // Reverse it.
+ char *q = buf;
+ while (q < p) {
+ char temp = *q;
+ *q = *p;
+ *p = temp;
+ --p;
+ ++q;
+ }
+ break;
+ }
+ default:
+ assert(0);
+ }
+ return buf;
+}
+
+void field_expr::evaluate(int, const reference &ref,
+ string &result, substring_position &)
+{
+ const char *end;
+ const char *start = ref.get_field(name, &end);
+ if (start) {
+ start = nth_field(number, start, &end);
+ if (start)
+ result.append(start, end - start);
+ }
+}
+
+void literal_expr::evaluate(int, const reference &,
+ string &result, substring_position &)
+{
+ result += s;
+}
+
+analyzed_expr::analyzed_expr(expression *e)
+: unary_expr(e), flags(e ? e->analyze() : 0)
+{
+}
+
+void analyzed_expr::evaluate(int tentative, const reference &ref,
+ string &result, substring_position &pos)
+{
+ if (expr)
+ expr->evaluate(tentative, ref, result, pos);
+}
+
+void star_expr::evaluate(int tentative, const reference &ref,
+ string &result, substring_position &pos)
+{
+ const label_info *lp = ref.get_label_ptr();
+ if (!tentative
+ && (lp == 0 || lp->total > 1)
+ && expr)
+ expr->evaluate(tentative, ref, result, pos);
+}
+
+void separator_expr::evaluate(int tentative, const reference &ref,
+ string &result, substring_position &pos)
+{
+ int start_length = result.length();
+ int is_first = pos.start < 0;
+ if (expr)
+ expr->evaluate(tentative, ref, result, pos);
+ if (is_first) {
+ pos.start = start_length;
+ pos.length = result.length() - start_length;
+ }
+}
+
+void map_expr::evaluate(int tentative, const reference &ref,
+ string &result, substring_position &)
+{
+ if (expr) {
+ string temp;
+ substring_position temp_pos;
+ expr->evaluate(tentative, ref, temp, temp_pos);
+ (*func)(temp.contents(), temp.contents() + temp.length(), result);
+ }
+}
+
+void extractor_expr::evaluate(int tentative, const reference &ref,
+ string &result, substring_position &)
+{
+ if (expr) {
+ string temp;
+ substring_position temp_pos;
+ expr->evaluate(tentative, ref, temp, temp_pos);
+ const char *end, *start = (*func)(temp.contents(),
+ temp.contents() + temp.length(),
+ &end);
+ switch (part) {
+ case BEFORE:
+ if (start)
+ result.append(temp.contents(), start - temp.contents());
+ else
+ result += temp;
+ break;
+ case MATCH:
+ if (start)
+ result.append(start, end - start);
+ break;
+ case AFTER:
+ if (start)
+ result.append(end, temp.contents() + temp.length() - end);
+ break;
+ default:
+ assert(0);
+ }
+ }
+}
+
+static void first_part(int len, const char *ptr, const char *end,
+ string &result)
+{
+ for (;;) {
+ const char *token_start = ptr;
+ if (!get_token(&ptr, end))
+ break;
+ const token_info *ti = lookup_token(token_start, ptr);
+ int counts = ti->sortify_non_empty(token_start, ptr);
+ if (counts && --len < 0)
+ break;
+ if (counts || ti->is_accent())
+ result.append(token_start, ptr - token_start);
+ }
+}
+
+static void last_part(int len, const char *ptr, const char *end,
+ string &result)
+{
+ const char *start = ptr;
+ int count = 0;
+ for (;;) {
+ const char *token_start = ptr;
+ if (!get_token(&ptr, end))
+ break;
+ const token_info *ti = lookup_token(token_start, ptr);
+ if (ti->sortify_non_empty(token_start, ptr))
+ count++;
+ }
+ ptr = start;
+ int skip = count - len;
+ if (skip > 0) {
+ for (;;) {
+ const char *token_start = ptr;
+ if (!get_token(&ptr, end))
+ assert(0);
+ const token_info *ti = lookup_token(token_start, ptr);
+ if (ti->sortify_non_empty(token_start, ptr) && --skip < 0) {
+ ptr = token_start;
+ break;
+ }
+ }
+ }
+ first_part(len, ptr, end, result);
+}
+
+void truncate_expr::evaluate(int tentative, const reference &ref,
+ string &result, substring_position &)
+{
+ if (expr) {
+ string temp;
+ substring_position temp_pos;
+ expr->evaluate(tentative, ref, temp, temp_pos);
+ const char *start = temp.contents();
+ const char *end = start + temp.length();
+ if (n > 0)
+ first_part(n, start, end, result);
+ else if (n < 0)
+ last_part(-n, start, end, result);
+ }
+}
+
+void alternative_expr::evaluate(int tentative, const reference &ref,
+ string &result, substring_position &pos)
+{
+ int start_length = result.length();
+ if (expr1)
+ expr1->evaluate(tentative, ref, result, pos);
+ if (result.length() == start_length && expr2)
+ expr2->evaluate(tentative, ref, result, pos);
+}
+
+void list_expr::evaluate(int tentative, const reference &ref,
+ string &result, substring_position &pos)
+{
+ if (expr1)
+ expr1->evaluate(tentative, ref, result, pos);
+ if (expr2)
+ expr2->evaluate(tentative, ref, result, pos);
+}
+
+void substitute_expr::evaluate(int tentative, const reference &ref,
+ string &result, substring_position &pos)
+{
+ int start_length = result.length();
+ if (expr1)
+ expr1->evaluate(tentative, ref, result, pos);
+ if (result.length() > start_length && result[result.length() - 1] == '-') {
+ // ought to see if pos covers the -
+ result.set_length(result.length() - 1);
+ if (expr2)
+ expr2->evaluate(tentative, ref, result, pos);
+ }
+}
+
+void conditional_expr::evaluate(int tentative, const reference &ref,
+ string &result, substring_position &pos)
+{
+ string temp;
+ substring_position temp_pos;
+ if (expr1)
+ expr1->evaluate(tentative, ref, temp, temp_pos);
+ if (temp.length() > 0) {
+ if (expr2)
+ expr2->evaluate(tentative, ref, result, pos);
+ }
+ else {
+ if (expr3)
+ expr3->evaluate(tentative, ref, result, pos);
+ }
+}
+
+void reference::pre_compute_label()
+{
+ if (parsed_label != 0
+ && (parsed_label->analyze() & expression::CONTAINS_VARIABLE)) {
+ label.clear();
+ substring_position temp_pos;
+ parsed_label->evaluate(1, *this, label, temp_pos);
+ label_ptr = lookup_label(label);
+ }
+}
+
+void reference::compute_label()
+{
+ label.clear();
+ if (parsed_label)
+ parsed_label->evaluate(0, *this, label, separator_pos);
+ if (short_label_flag && parsed_short_label)
+ parsed_short_label->evaluate(0, *this, short_label, short_separator_pos);
+ if (date_as_label) {
+ string new_date;
+ if (parsed_date_label) {
+ substring_position temp_pos;
+ parsed_date_label->evaluate(0, *this, new_date, temp_pos);
+ }
+ set_date(new_date);
+ }
+ if (label_ptr)
+ label_ptr->count += 1;
+}
+
+void reference::immediate_compute_label()
+{
+ if (label_ptr)
+ label_ptr->total = 2; // force use of disambiguator
+ compute_label();
+}
+
+int reference::merge_labels(reference **v, int n, label_type type,
+ string &result)
+{
+ if (abbreviate_label_ranges)
+ return merge_labels_by_number(v, n, type, result);
+ else
+ return merge_labels_by_parts(v, n, type, result);
+}
+
+int reference::merge_labels_by_number(reference **v, int n, label_type type,
+ string &result)
+{
+ if (n <= 1)
+ return 0;
+ int num = get_number();
+ // Only merge three or more labels.
+ if (v[0]->get_number() != num + 1
+ || v[1]->get_number() != num + 2)
+ return 0;
+ int i;
+ for (i = 2; i < n; i++)
+ if (v[i]->get_number() != num + i + 1)
+ break;
+ result = get_label(type);
+ result += label_range_indicator;
+ result += v[i - 1]->get_label(type);
+ return i;
+}
+
+const substring_position &reference::get_separator_pos(label_type type) const
+{
+ if (type == SHORT_LABEL && short_label_flag)
+ return short_separator_pos;
+ else
+ return separator_pos;
+}
+
+const string &reference::get_label(label_type type) const
+{
+ if (type == SHORT_LABEL && short_label_flag)
+ return short_label;
+ else
+ return label;
+}
+
+int reference::merge_labels_by_parts(reference **v, int n, label_type type,
+ string &result)
+{
+ if (n <= 0)
+ return 0;
+ const string &lb = get_label(type);
+ const substring_position &sp = get_separator_pos(type);
+ if (sp.start < 0
+ || sp.start != v[0]->get_separator_pos(type).start
+ || memcmp(lb.contents(), v[0]->get_label(type).contents(),
+ sp.start) != 0)
+ return 0;
+ result = lb;
+ int i = 0;
+ do {
+ result += separate_label_second_parts;
+ const substring_position &s = v[i]->get_separator_pos(type);
+ int sep_end_pos = s.start + s.length;
+ result.append(v[i]->get_label(type).contents() + sep_end_pos,
+ v[i]->get_label(type).length() - sep_end_pos);
+ } while (++i < n
+ && sp.start == v[i]->get_separator_pos(type).start
+ && memcmp(lb.contents(), v[i]->get_label(type).contents(),
+ sp.start) == 0);
+ return i;
+}
+
+string label_pool;
+
+label_info::label_info(const string &s)
+: start(label_pool.length()), length(s.length()), count(0), total(1)
+{
+ label_pool += s;
+}
+
+static label_info **label_table = 0;
+static int label_table_size = 0;
+static int label_table_used = 0;
+
+label_info *lookup_label(const string &label)
+{
+ if (label_table == 0) {
+ label_table = new label_info *[17];
+ label_table_size = 17;
+ for (int i = 0; i < 17; i++)
+ label_table[i] = 0;
+ }
+ unsigned h = hash_string(label.contents(), label.length()) % label_table_size;
+ label_info **ptr;
+ for (ptr = label_table + h;
+ *ptr != 0;
+ (ptr == label_table)
+ ? (ptr = label_table + label_table_size - 1)
+ : ptr--)
+ if ((*ptr)->length == label.length()
+ && memcmp(label_pool.contents() + (*ptr)->start, label.contents(),
+ label.length()) == 0) {
+ (*ptr)->total += 1;
+ return *ptr;
+ }
+ label_info *result = *ptr = new label_info(label);
+ if (++label_table_used * 2 > label_table_size) {
+ // Rehash the table.
+ label_info **old_table = label_table;
+ int old_size = label_table_size;
+ label_table_size = next_size(label_table_size);
+ label_table = new label_info *[label_table_size];
+ int i;
+ for (i = 0; i < label_table_size; i++)
+ label_table[i] = 0;
+ for (i = 0; i < old_size; i++)
+ if (old_table[i]) {
+ h = hash_string(label_pool.contents() + old_table[i]->start,
+ old_table[i]->length);
+ label_info **p;
+ for (p = label_table + (h % label_table_size);
+ *p != 0;
+ (p == label_table)
+ ? (p = label_table + label_table_size - 1)
+ : --p)
+ ;
+ *p = old_table[i];
+ }
+ delete[] old_table;
+ }
+ return result;
+}
+
+void clear_labels()
+{
+ for (int i = 0; i < label_table_size; i++) {
+ delete label_table[i];
+ label_table[i] = 0;
+ }
+ label_table_used = 0;
+ label_pool.clear();
+}
+
+static void consider_authors(reference **start, reference **end, int i);
+
+void compute_labels(reference **v, int n)
+{
+ if (parsed_label
+ && (parsed_label->analyze() & expression::CONTAINS_AT)
+ && sort_fields.length() >= 2
+ && sort_fields[0] == 'A'
+ && sort_fields[1] == '+')
+ consider_authors(v, v + n, 0);
+ for (int i = 0; i < n; i++)
+ v[i]->compute_label();
+}
+
+
+/* A reference with a list of authors <A0,A1,...,AN> _needs_ author i
+where 0 <= i <= N if there exists a reference with a list of authors
+<B0,B1,...,BM> such that <A0,A1,...,AN> != <B0,B1,...,BM> and M >= i
+and Aj = Bj for 0 <= j < i. In this case if we can't say "A0,
+A1,...,A(i-1) et al" because this would match both <A0,A1,...,AN> and
+<B0,B1,...,BM>. If a reference needs author i we only have to call
+need_author(j) for some j >= i such that the reference also needs
+author j. */
+
+/* This function handles 2 tasks:
+determine which authors are needed (cannot be elided with et al.);
+determine which authors can have only last names in the labels.
+
+References >= start and < end have the same first i author names.
+Also they're sorted by A+. */
+
+static void consider_authors(reference **start, reference **end, int i)
+{
+ if (start >= end)
+ return;
+ reference **p = start;
+ if (i >= (*p)->get_nauthors()) {
+ for (++p; p < end && i >= (*p)->get_nauthors(); p++)
+ ;
+ if (p < end && i > 0) {
+ // If we have an author list <A B C> and an author list <A B C D>,
+ // then both lists need C.
+ for (reference **q = start; q < end; q++)
+ (*q)->need_author(i - 1);
+ }
+ start = p;
+ }
+ while (p < end) {
+ reference **last_name_start = p;
+ reference **name_start = p;
+ for (++p;
+ p < end && i < (*p)->get_nauthors()
+ && same_author_last_name(**last_name_start, **p, i);
+ p++) {
+ if (!same_author_name(**name_start, **p, i)) {
+ consider_authors(name_start, p, i + 1);
+ name_start = p;
+ }
+ }
+ consider_authors(name_start, p, i + 1);
+ if (last_name_start == name_start) {
+ for (reference **q = last_name_start; q < p; q++)
+ (*q)->set_last_name_unambiguous(i);
+ }
+ // If we have an author list <A B C D> and <A B C E>, then the lists
+ // need author D and E respectively.
+ if (name_start > start || p < end) {
+ for (reference **q = last_name_start; q < p; q++)
+ (*q)->need_author(i);
+ }
+ }
+}
+
+int same_author_last_name(const reference &r1, const reference &r2, int n)
+{
+ const char *ae1;
+ const char *as1 = r1.get_sort_field(0, n, 0, &ae1);
+ const char *ae2;
+ const char *as2 = r2.get_sort_field(0, n, 0, &ae2);
+ if (!as1 && !as2) return 1; // they are the same
+ if (!as1 || !as2) return 0;
+ return ae1 - as1 == ae2 - as2 && memcmp(as1, as2, ae1 - as1) == 0;
+}
+
+int same_author_name(const reference &r1, const reference &r2, int n)
+{
+ const char *ae1;
+ const char *as1 = r1.get_sort_field(0, n, -1, &ae1);
+ const char *ae2;
+ const char *as2 = r2.get_sort_field(0, n, -1, &ae2);
+ if (!as1 && !as2) return 1; // they are the same
+ if (!as1 || !as2) return 0;
+ return ae1 - as1 == ae2 - as2 && memcmp(as1, as2, ae1 - as1) == 0;
+}
+
+
+void int_set::set(int i)
+{
+ assert(i >= 0);
+ int bytei = i >> 3;
+ if (bytei >= v.length()) {
+ int old_length = v.length();
+ v.set_length(bytei + 1);
+ for (int j = old_length; j <= bytei; j++)
+ v[j] = 0;
+ }
+ v[bytei] |= 1 << (i & 7);
+}
+
+int int_set::get(int i) const
+{
+ assert(i >= 0);
+ int bytei = i >> 3;
+ return bytei >= v.length() ? 0 : (v[bytei] & (1 << (i & 7))) != 0;
+}
+
+void reference::set_last_name_unambiguous(int i)
+{
+ last_name_unambiguous.set(i);
+}
+
+void reference::need_author(int n)
+{
+ if (n > last_needed_author)
+ last_needed_author = n;
+}
+
+const char *reference::get_authors(const char **end) const
+{
+ if (!computed_authors) {
+ ((reference *)this)->computed_authors = 1;
+ string &result = ((reference *)this)->authors;
+ int na = get_nauthors();
+ result.clear();
+ for (int i = 0; i < na; i++) {
+ if (last_name_unambiguous.get(i)) {
+ const char *e, *start = get_author_last_name(i, &e);
+ assert(start != 0);
+ result.append(start, e - start);
+ }
+ else {
+ const char *e, *start = get_author(i, &e);
+ assert(start != 0);
+ result.append(start, e - start);
+ }
+ if (i == last_needed_author
+ && et_al.length() > 0
+ && et_al_min_elide > 0
+ && last_needed_author + et_al_min_elide < na
+ && na >= et_al_min_total) {
+ result += et_al;
+ break;
+ }
+ if (i < na - 1) {
+ if (na == 2)
+ result += join_authors_exactly_two;
+ else if (i < na - 2)
+ result += join_authors_default;
+ else
+ result += join_authors_last_two;
+ }
+ }
+ }
+ const char *start = authors.contents();
+ *end = start + authors.length();
+ return start;
+}
+
+int reference::get_nauthors() const
+{
+ if (nauthors < 0) {
+ const char *dummy;
+ int na;
+ for (na = 0; get_author(na, &dummy) != 0; na++)
+ ;
+ ((reference *)this)->nauthors = na;
+ }
+ return nauthors;
+}
+
+// Local Variables:
+// fill-column: 72
+// mode: C++
+// End:
+// vim: set cindent noexpandtab shiftwidth=2 textwidth=72:
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 12:22:22 +0000