+/* aslink.h */
+
+/*
+ * (C) Copyright 1989-1996
+ * All Rights Reserved
+ *
+ * Alan R. Baldwin
+ * 721 Berkeley St.
+ * Kent, Ohio 44240
+ *
+ * 28-Oct-97 JLH:
+ * - add proto for StoreString
+ * - change s_id from [NCPS] to pointer
+ * - change NCPS to 80
+ * - case sensitive
+ * - add R_J11 for 8051 assembler
+ * 31-Oct-97 JLH:
+ * - add jflag and jfp for NoICE output
+ * 30-Jan-98 JLH:
+ * - add memory space flags to a_flag for 8051
+ *
+ * Extensions: P. Felber
+ */
+
+#define VERSION "V01.75 + NoICE + SDCC Feb 1999"
+
+/*
+ * Case Sensitivity Flag
+ */
+#define CASE_SENSITIVE 1
+
+/*)Module asmlnk.h
+ *
+ * The module asmlnk.h contains the definitions for constants,
+ * structures, global variables, and LKxxxx functions
+ * contained in the LKxxxx.c files.
+ */
+
+/*)BUILD
+ $(PROGRAM) = ASLINK
+ $(INCLUDE) = ASLINK.H
+ $(FILES) = {
+ LKMAIN.C
+ LKLEX.C
+ LKAREA.C
+ LKHEAD.C
+ LKSYM.C
+ LKEVAL.C
+ LKDATA.C
+ LKLIST.C
+ LKRLOC.C
+ LKLIBR.C
+ LKS19.C
+ LKIHX.C
+ }
+ $(STACK) = 2000
+*/
+
+/* DECUS C void definition */
+/* File/extension seperator */
+
+#ifdef decus
+#define VOID char
+#define FSEPX '.'
+#endif
+
+/* PDOS C void definition */
+/* File/extension seperator */
+
+#ifdef PDOS
+#define VOID char
+#define FSEPX ':'
+#endif
+
+/* Default void definition */
+/* File/extension seperator */
+
+#ifndef VOID
+#define VOID void
+#define FSEPX '.'
+#define OTHERSYSTEM
+#endif
+
+/*
+ * PATH_MAX
+ */
+#include <limits.h>
+#ifndef PATH_MAX /* POSIX, but not required */
+ #if defined(__BORLANDC__) || defined(_MSC_VER)
+ #include <stdlib.h>
+ #define PATH_MAX _MAX_PATH
+ #else
+ #define PATH_MAX 255 /* define a reasonable value */
+ #endif
+#endif
+
+/*
+ * This file defines the format of the
+ * relocatable binary file.
+ */
+
+#define NCPS 80 /* characters per symbol (JLH: change from 8) */
+#define NDATA 16 /* actual data */
+#define NINPUT PATH_MAX /* Input buffer size */
+#define NHASH 64 /* Buckets in hash table */
+#define HMASK 077 /* Hash mask */
+#define NLPP 60 /* Lines per page */
+#define NTXT 16 /* T values */
+
+/*
+ * The "R_" relocation constants define values used in
+ * generating the assembler relocation output data for
+ * areas, symbols, and code.
+ *
+ *
+ * Relocation types.
+ *
+ * 7 6 5 4 3 2 1 0
+ * +-----+-----+-----+-----+-----+-----+-----+-----+
+ * | MSB | PAGn| PAG0| USGN| BYT2| PCR | SYM | BYT |
+ * +-----+-----+-----+-----+-----+-----+-----+-----+
+ */
+
+#define R_WORD 0x00 /* 16 bit */
+#define R_BYTE 0x01 /* 8 bit */
+
+#define R_AREA 0x00 /* Base type */
+#define R_SYM 0x02
+
+#define R_NORM 0x00 /* PC adjust */
+#define R_PCR 0x04
+
+#define R_BYT1 0x00 /* Byte count for R_BYTE = 1 */
+#define R_BYT2 0x08 /* Byte count for R_BYTE = 2 */
+
+#define R_SGND 0x00 /* Signed Byte */
+#define R_USGN 0x10 /* Unsigned Byte */
+
+#define R_NOPAG 0x00 /* Page Mode */
+#define R_PAG0 0x20 /* Page '0' */
+#define R_PAG 0x40 /* Page 'nnn' */
+
+#define R_LSB 0x00 /* low byte */
+#define R_MSB 0x80 /* high byte */
+
+#define R_BYT3 0x100 /* if R_BYTE is set, this is a
+ * 3 byte address, of which
+ * the linker must select one byte.
+ */
+#define R_HIB 0x200 /* If R_BYTE & R_BYT3 are set, linker
+ * will select byte 3 of the relocated
+ * 24 bit address.
+ */
+
+#define R_BIT 0x400 /* Linker will convert from byte-addressable
+ * space to bit-addressable space.
+ */
+
+#define R_J11 (R_WORD|R_BYT2) /* JLH: 11 bit JMP and CALL (8051) */
+#define R_J19 (R_WORD|R_BYT2|R_MSB) /* 19 bit JMP/CALL (DS80C390) */
+#define R_C24 (R_WORD|R_BYT1|R_MSB) /* 24 bit address (DS80C390) */
+#define R_J19_MASK (R_BYTE|R_BYT2|R_MSB)
+
+#define IS_R_J19(x) (((x) & R_J19_MASK) == R_J19)
+#define IS_R_J11(x) (((x) & R_J19_MASK) == R_J11)
+#define IS_C24(x) (((x) & R_J19_MASK) == R_C24)
+
+#define R_ESCAPE_MASK 0xf0 /* Used to escape relocation modes
+ * greater than 0xff in the .rel
+ * file.
+ */
+
+/*
+ * Global symbol types.
+ */
+#define S_REF 1 /* referenced */
+#define S_DEF 2 /* defined */
+
+/*
+ * Area type flags
+ */
+#define A_CON 0000 /* concatenate */
+#define A_OVR 0004 /* overlay */
+#define A_REL 0000 /* relocatable */
+#define A_ABS 0010 /* absolute */
+#define A_NOPAG 0000 /* non-paged */
+#define A_PAG 0020 /* paged */
+
+/* Additional flags for 8051 address spaces */
+#define A_DATA 0000 /* data space (default)*/
+#define A_CODE 0040 /* code space */
+#define A_XDATA 0100 /* external data space */
+#define A_BIT 0200 /* bit addressable space */
+
+/* Additional flags for hc08 */
+#define A_NOLOAD 0400 /* nonloadable */
+#define A_LOAD 0000 /* loadable (default) */
+
+/*
+ * File types
+ */
+#define F_INV 0 /* invalid */
+#define F_STD 1 /* stdin */
+#define F_LNK 2 /* File.lnk */
+#define F_REL 3 /* File.rel */
+#define F_CMD 4 /* Command line */
+
+#ifdef GAMEBOY
+/*
+ * Multiple banks support
+ */
+extern int nb_rom_banks;
+extern int nb_ram_banks;
+extern int current_rom_bank;
+extern int mbc_type;
+extern char cart_name[];
+/*
+ * ROM patching support
+ */
+typedef struct _patch {
+ unsigned int addr;
+ unsigned char value;
+ struct _patch *next;
+} patch;
+extern patch* patches;
+#endif /* GAMEBOY */
+
+/*
+ * General assembler address type
+ */
+typedef unsigned int Addr_T;
+
+/*
+ * The structures of head, area, areax, and sym are created
+ * as the REL files are read during the first pass of the
+ * linker. The struct head is created upon encountering a
+ * H directive in the REL file. The structure contains a
+ * link to a link file structure (struct lfile) which describes
+ * the file containing the H directive, the number of data/code
+ * areas contained in this header segment, the number of
+ * symbols referenced/defined in this header segment, a pointer
+ * to an array of pointers to areax structures (struct areax)
+ * created as each A directive is read, and a pointer to an
+ * array of pointers to symbol structures (struct sym) for
+ * all referenced/defined symbols. As H directives are read
+ * from the REL files a linked list of head structures is
+ * created by placing a link to the new head structure
+ * in the previous head structure.
+ */
+struct head
+{
+ struct head *h_hp; /* Header link */
+ struct lfile *h_lfile;/* Associated file */
+ int h_narea; /* # of areas */
+ struct areax **a_list; /* Area list */
+ int h_nglob; /* # of global symbols */
+ struct sym **s_list; /* Globle symbol list */
+ char m_id[NCPS]; /* Module name */
+};
+
+/*
+ * A structure area is created for each 'unique' data/code
+ * area definition found as the REL files are read. The
+ * struct area contains the name of the area, a flag byte
+ * which contains the area attributes (REL/CON/OVR/ABS),
+ * an area subtype (not used in this assembler), and the
+ * area base address and total size which will be filled
+ * in at the end of the first pass through the REL files.
+ * As A directives are read from the REL files a linked
+ * list of unique area structures is created by placing a
+ * link to the new area structure in the previous area structure.
+ */
+struct area
+{
+ struct area *a_ap; /* Area link */
+ struct areax *a_axp; /* Area extension link */
+ Addr_T a_addr; /* Beginning address of area */
+ Addr_T a_size; /* Total size of the area */
+ Addr_T a_unaloc; /* Total number of unallocated bytes, for error reporting */
+ char a_type; /* Area subtype */
+ char a_flag; /* Flag byte */
+ char a_id[NCPS]; /* Name */
+};
+
+/*
+ * An areax structure is created for every A directive found
+ * while reading the REL files. The struct areax contains a
+ * link to the 'unique' area structure referenced by the A
+ * directive and to the head structure this area segment is
+ * a part of. The size of this area segment as read from the
+ * A directive is placed in the areax structure. The beginning
+ * address of this segment will be filled in at the end of the
+ * first pass through the REL files. As A directives are read
+ * from the REL files a linked list of areax structures is
+ * created for each unique area. The final areax linked
+ * list has at its head the 'unique' area structure linked
+ * to the linked areax structures (one areax structure for
+ * each A directive for this area).
+ */
+struct areax
+{
+ struct areax *a_axp; /* Area extension link */
+ struct area *a_bap; /* Base area link */
+ struct head *a_bhp; /* Base header link */
+ Addr_T a_addr; /* Beginning address of section */
+ Addr_T a_size; /* Size of the area in section */
+};
+
+/*
+ * A sym structure is created for every unique symbol
+ * referenced/defined while reading the REL files. The
+ * struct sym contains the symbol's name, a flag value
+ * (not used in this linker), a symbol type denoting
+ * referenced/defined, and an address which is loaded
+ * with the relative address within the area in which
+ * the symbol was defined. The sym structure also
+ * contains a link to the area where the symbol was defined.
+ * The sym structures are linked into linked lists using
+ * the symbol link element.
+ */
+struct sym
+{
+ struct sym *s_sp; /* Symbol link */
+ struct areax *s_axp; /* Symbol area link */
+ char s_type; /* Symbol subtype */
+ char s_flag; /* Flag byte */
+ Addr_T s_addr; /* Address */
+ char *s_id; /* Name: JLH change from [NCPS] */
+};
+
+/*
+ * The structure lfile contains a pointer to a
+ * file specification string, the file type, and
+ * a link to the next lfile structure.
+ */
+struct lfile
+{
+ struct lfile *f_flp; /* lfile link */
+ int f_type; /* File type */
+ char *f_idp; /* Pointer to file spec */
+};
+
+/*
+ * The struct base contains a pointer to a
+ * base definition string and a link to the next
+ * base structure.
+ */
+struct base
+{
+ struct base *b_base; /* Base link */
+ char *b_strp; /* String pointer */
+};
+
+/*
+ * The struct globl contains a pointer to a
+ * global definition string and a link to the next
+ * global structure.
+ */
+struct globl
+{
+ struct globl *g_globl; /* Global link */
+ char *g_strp; /* String pointer */
+};
+
+/*
+ * A structure sdp is created for each 'unique' paged
+ * area definition found as the REL files are read.
+ * As P directives are read from the REL files a linked
+ * list of unique sdp structures is created by placing a
+ * link to the new sdp structure in the previous area structure.
+ */
+struct sdp
+{
+ struct area *s_area; /* Paged Area link */
+ struct areax *s_areax; /* Paged Area Extension Link */
+ Addr_T s_addr; /* Page address offset */
+};
+
+/*
+ * The structure rerr is loaded with the information
+ * required to report an error during the linking
+ * process. The structure contains an index value
+ * which selects the areax structure from the header
+ * areax structure list, a mode value which selects
+ * symbol or area relocation, the base address in the
+ * area section, an area/symbol list index value, and
+ * an area/symbol offset value.
+ */
+struct rerr
+{
+ int aindex; /* Linking area */
+ int mode; /* Relocation mode */
+ Addr_T rtbase; /* Base address in section */
+ int rindex; /* Area/Symbol reloaction index */
+ Addr_T rval; /* Area/Symbol offset value */
+};
+
+/*
+ * The structure lbpath is created for each library
+ * path specification input by the -k option. The
+ * lbpath structures are linked into a list using
+ * the next link element.
+ */
+struct lbpath {
+ struct lbpath *next;
+ char *path;
+};
+
+/*
+ * The structure lbname is created for all combinations of the
+ * library path specifications (input by the -k option) and the
+ * library file specifications (input by the -l option) that
+ * lead to an existing file. The element path points to
+ * the path string, element libfil points to the library
+ * file string, and the element libspc is the concatenation
+ * of the valid path and libfil strings.
+ *
+ * The lbpath structures are linked into a list
+ * using the next link element.
+ *
+ * Each library file contains a list of object files
+ * that are contained in the particular library. e.g.:
+ *
+ * \iolib\termio
+ * \inilib\termio
+ *
+ * Only one specification per line is allowed.
+ */
+struct lbname {
+ struct lbname *next;
+ char *path;
+ char *libfil;
+ char *libspc;
+};
+
+/*
+ * The function fndsym() searches through all combinations of the
+ * library path specifications (input by the -k option) and the
+ * library file specifications (input by the -l option) that
+ * lead to an existing file for a symbol definition.
+ *
+ * The structure lbfile is created for the first library
+ * object file which contains the definition for the
+ * specified undefined symbol.
+ *
+ * The element libspc points to the library file path specification
+ * and element relfil points to the object file specification string.
+ * The element filspc is the complete path/file specification for
+ * the library file to be imported into the linker. The
+ * file specicifation may be formed in one of two ways:
+ *
+ * (1) If the library file contained an absolute
+ * path/file specification then this becomes filspc.
+ * (i.e. C:\...)
+ *
+ * (2) If the library file contains a relative path/file
+ * specification then the concatenation of the path
+ * and this file specification becomes filspc.
+ * (i.e. \...)
+ *
+ * The lbpath structures are linked into a list
+ * using the next link element.
+ */
+struct lbfile {
+ struct lbfile *next;
+ char *libspc;
+ char *relfil;
+ char *filspc;
+ long offset; /*>=0 if rel file is embedded in a lib file at this offset*/
+};
+
+/*
+ * External Definitions for all Global Variables
+ */
+
+extern char *_abs_; /* = { ". .ABS." };
+ */
+extern int lkerr; /* ASLink error flag
+ */
+extern char *ip; /* pointer into the REL file
+ * text line in ib[]
+ */
+extern char ib[NINPUT]; /* REL file text line
+ */
+extern char *rp; /* pointer into the LST file
+ * text line in rb[]
+ */
+extern char rb[NINPUT]; /* LST file text line being
+ * address relocated
+ */
+extern unsigned char ctype[]; /* array of character types, one per
+ * ASCII character
+ */
+
+extern char sdccopt[NINPUT];
+extern char sdccopt_module[NINPUT];
+extern char curr_module[NINPUT];
+
+/*
+ * Character Type Definitions
+ */
+#define SPACE 0000
+#define ETC 0000
+#define LETTER 0001
+#define DIGIT 0002
+#define BINOP 0004
+#define RAD2 0010
+#define RAD8 0020
+#define RAD10 0040
+#define RAD16 0100
+#define ILL 0200
+
+#define DGT2 DIGIT|RAD16|RAD10|RAD8|RAD2
+#define DGT8 DIGIT|RAD16|RAD10|RAD8
+#define DGT10 DIGIT|RAD16|RAD10
+#define LTR16 LETTER|RAD16
+
+#if CASE_SENSITIVE
+#else
+extern char ccase[]; /* an array of characters which
+ * perform the case translation function
+ */
+#endif
+
+extern struct lfile *filep; /* The pointers (lfile *) filep,
+ * (lfile *) cfp, and (FILE *) sfp
+ * are used in conjunction with
+ * the routine lk_getline() to read
+ * asmlnk commands from
+ * (1) the standard input or
+ * (2) or a command file
+ * and to read the REL files
+ * sequentially as defined by the
+ * asmlnk input commands.
+ *
+ * The pointer *filep points to the
+ * beginning of a linked list of
+ * lfile structures.
+ */
+extern struct lfile *cfp; /* The pointer *cfp points to the
+ * current lfile structure
+ */
+extern struct lfile *startp;/* asmlnk startup file structure
+ */
+extern struct lfile *linkp; /* pointer to first lfile structure
+ * containing an input REL file
+ * specification
+ */
+extern struct lfile *lfp; /* pointer to current lfile structure
+ * being processed by parse()
+ */
+extern struct head *headp; /* The pointer to the first
+ * head structure of a linked list
+ */
+extern struct head *hp; /* Pointer to the current
+ * head structure
+ */
+extern struct area *areap; /* The pointer to the first
+ * area structure of a linked list
+ */
+extern struct area *ap; /* Pointer to the current
+ * area structure
+ */
+extern struct areax *axp; /* Pointer to the current
+ * areax structure
+ */
+extern struct sym *symhash[NHASH]; /* array of pointers to NHASH
+ * linked symbol lists
+ */
+extern struct base *basep; /* The pointer to the first
+ * base structure
+ */
+extern struct base *bsp; /* Pointer to the current
+ * base structure
+ */
+extern struct globl *globlp;/* The pointer to the first
+ * globl structure
+ */
+extern struct globl *gsp; /* Pointer to the current
+ * globl structure
+ */
+extern struct sdp sdp; /* Base Paged structure
+ */
+extern struct rerr rerr; /* Structure containing the
+ * linker error information
+ */
+extern FILE *ofp; /* Linker Output file handle
+ */
+extern FILE *mfp; /* Map output file handle
+ */
+extern FILE *jfp; /* NoICE output file handle
+ */
+extern FILE *rfp; /* File handle for output
+ * address relocated ASxxxx
+ * listing file
+ */
+extern FILE *sfp; /* The file handle sfp points to the
+ * currently open file
+ */
+extern FILE *tfp; /* File handle for input
+ * ASxxxx listing file
+ */
+extern FILE *dfp; /* File handle for debug info output
+ */
+extern int dflag; /* Output debug information flag
+ */
+extern int oflag; /* Output file type flag
+ */
+extern int mflag; /* Map output flag
+ */
+extern int sflag; /* JCF: Memory usage output flag
+ */
+extern int packflag; /* Pack data memory flag
+ */
+extern int stacksize; /* Pack data memory flag
+ */
+extern int jflag; /* NoICE output flag
+ */
+extern int symflag; /* no$gmb .sym output flag
+ */
+extern int xflag; /* Map file radix type flag
+ */
+extern int pflag; /* print linker command file flag
+ */
+extern int uflag; /* Listing relocation flag
+ */
+extern int rflag; /* Extended linear address record flag.
+ */
+extern int radix; /* current number conversion radix:
+ * 2 (binary), 8 (octal), 10 (decimal),
+ * 16 (hexadecimal)
+ */
+extern int line; /* current line number
+ */
+extern int page; /* current page number
+ */
+extern int lop; /* current line number on page
+ */
+extern int pass; /* linker pass number
+ */
+extern int rtcnt; /* count of elements in the
+ * rtval[] and rtflg[] arrays
+ */
+extern Addr_T rtval[]; /* data associated with relocation
+ */
+extern int rtflg[]; /* indicates if rtval[] value is
+ * to be sent to the output file.
+ * (always set in this linker)
+ */
+extern int hilo; /* REL file byte ordering
+ */
+extern int gline; /* LST file relocation active
+ * for current line
+ */
+extern int gcntr; /* LST file relocation active
+ * counter
+ */
+extern struct lbpath *lbphead; /* pointer to the first
+ * library path structure
+ */
+extern struct lbname *lbnhead; /* pointer to the first
+ * library name structure
+ */
+extern struct lbfile *lbfhead; /* pointer to the first
+ * library file structure
+ */
+extern Addr_T iram_size; /* internal ram size
+ */
+extern long xram_size; /* external ram size
+ */
+extern long code_size; /* code size
+ */
+
+
+/* C Library function definitions */
+/* for reference only
+extern VOID exit();
+extern int fclose();
+extern char * fgets();
+extern FILE * fopen();
+extern int fprintf();
+extern VOID free();
+extern VOID * malloc();
+extern char putc();
+extern char * strcpy();
+extern int strlen();
+extern char * strncpy();
+*/
+
+/* Program function definitions */
+
+/* lkmain.c */
+extern FILE * afile();
+extern VOID bassav();
+extern VOID gblsav();
+extern VOID iramsav();
+extern VOID xramsav();
+extern VOID codesav();
+extern VOID iramcheck();
+extern VOID link_main();
+extern VOID lkexit();
+extern int main();
+extern VOID map();
+extern VOID sym();
+extern int parse();
+extern VOID setbas();
+extern VOID setgbl();
+extern VOID usage();
+extern VOID copyfile();
+
+/* lklex.c */
+extern char endline();
+extern char get();
+extern VOID getfid();
+extern VOID getid();
+extern VOID getSid(char *id);
+extern int lk_getline();
+extern int getmap();
+extern char getnb();
+extern int more();
+extern VOID skip();
+extern VOID unget();
+extern VOID chop_crlf();
+
+/* lkarea.c */
+extern VOID lkparea();
+extern VOID lnkarea();
+extern VOID lnkarea2();
+extern VOID newarea();
+
+/* lkhead.c */
+extern VOID module();
+extern VOID newhead();
+
+/* lksym.c */
+extern int hash();
+extern struct sym * lkpsym();
+extern VOID * new();
+extern struct sym * newsym();
+extern VOID symdef();
+extern int symeq();
+extern VOID syminit();
+extern VOID symmod();
+extern Addr_T symval();
+
+/* lkeval.c */
+extern int digit();
+extern Addr_T eval();
+extern Addr_T expr();
+extern int oprio();
+extern Addr_T term();
+
+/* lklist.c */
+extern int dgt();
+extern VOID lkulist();
+extern VOID lkalist();
+extern VOID lkglist();
+extern VOID lstarea();
+extern VOID newpag();
+extern VOID slew();
+
+/* lkrloc.c */
+extern Addr_T adb_b(register Addr_T v, register int i);
+extern Addr_T adb_bit(register Addr_T v, register int i);
+extern Addr_T adb_hi(Addr_T v, int i);
+extern Addr_T adb_lo(Addr_T v, int i);
+extern Addr_T adb_24_bit(register Addr_T v, register int i);
+extern Addr_T adb_24_hi(Addr_T v, int i);
+extern Addr_T adb_24_mid(Addr_T v, int i);
+extern Addr_T adb_24_lo(Addr_T v, int i);
+extern Addr_T adw_w(register Addr_T v, register int i);
+extern Addr_T adw_24(Addr_T v, int i);
+extern Addr_T adw_hi(Addr_T v, int i);
+extern Addr_T adw_lo(Addr_T v, int i);
+extern Addr_T evword(VOID);
+extern VOID rele(VOID);
+extern VOID reloc(char c);
+extern VOID relt(VOID);
+extern VOID relr(VOID);
+extern VOID relp(VOID);
+extern VOID relerr(char *str);
+extern char * errmsg[];
+extern VOID errdmp(FILE *fptr, char *str);
+extern VOID relerp(char *str);
+extern VOID erpdmp(FILE *fptr, char *str);
+extern VOID prntval(FILE *fptr, Addr_T v);
+extern int lastExtendedAddress;
+
+/* lklibr.c */
+extern int addfile();
+extern VOID addlib();
+extern VOID addpath();
+extern int fndsym();
+extern VOID library();
+extern VOID loadfile();
+extern VOID search();
+
+/* lks19.c */
+extern VOID s19();
+
+/* lkihx.c */
+extern VOID ihx();
+extern VOID ihxEntendedLinearAddress(Addr_T);
+extern VOID newArea();
+
+/* lkstore.c */
+extern char * StoreString( char *str );
+
+/* lknoice.c */
+extern void DefineNoICE( char *name, Addr_T value, int page );
+
+/* EEP: lkelf.c */
+extern VOID elf();
+
+/* JCF: lkmem.c */
+extern int summary(struct area * xp);
+extern int summary2(struct area * xp);
+
+/* JCF: lkaomf51.c */
+extern void SaveLinkedFilePath(char * filepath);
+extern void CreateAOMF51(void);
+
+/* lkgb.h */
+VOID gb(int in);
+VOID gg(int in);
+
+/* strcmpi.h */
+extern int as_strcmpi(const char *s1, const char *s2);
+extern int as_strncmpi(const char *s1, const char *s2, size_t n);