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#ifndef VAR_H
#define VAR_H
/* $OpenBSD: var.h,v 1.19 2016/10/23 14:54:14 espie Exp $ */
/*
* Copyright (c) 2001 Marc Espie.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
* PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
extern GNode *current_node;
extern void Var_Init(void);
extern void Var_setCheckEnvFirst(bool);
/* Global variable handling. */
/* value = Var_Valuei(name, end);
* Returns value of global variable name/end, or NULL if inexistent. */
extern char *Var_Valuei(const char *, const char *);
#define Var_Value(n) Var_Valuei(n, NULL)
/* isDefined = Var_Definedi(name, end);
* Checks whether global variable name/end is defined. */
extern bool Var_Definedi(const char *, const char *);
/* Var_Seti_with_ctxt(name, end, val, ctxt);
* Sets value val of variable name/end. Copies val.
* ctxt can be VAR_CMD (command line) or VAR_GLOBAL (normal variable). */
extern void Var_Seti_with_ctxt(const char *, const char *, const char *,
int);
#define Var_Set(n, v) Var_Seti_with_ctxt(n, NULL, v, VAR_GLOBAL)
#define Var_Seti(n, e, v) Var_Seti_with_ctxt(n, e, v, VAR_GLOBAL)
/* Var_Appendi_with_ctxt(name, end, val, cxt);
* Appends value val to variable name/end in context ctxt, defining it
* if it does not already exist, and inserting one space otherwise. */
extern void Var_Appendi_with_ctxt(const char *, const char *,
const char *, int);
#define Var_Append(n, v) Var_Appendi_with_ctxt(n, NULL, v, VAR_GLOBAL)
#define Var_Appendi(n, e, v) Var_Appendi_with_ctxt(n, e, v, VAR_GLOBAL)
/* Var_Deletei(name, end);
* Deletes a global variable. */
extern void Var_Deletei(const char *, const char *);
/* Dynamic variable indices */
#define TARGET_INDEX 0
#define PREFIX_INDEX 1
#define ARCHIVE_INDEX 2
#define MEMBER_INDEX 3
#define IMPSRC_INDEX 4
#define OODATE_INDEX 5
#define ALLSRC_INDEX 6
#define Var(idx, gn) ((gn)->context.locals[idx])
/* SymTable_Init(t);
* Inits the local symtable in a GNode. */
extern void SymTable_Init(SymTable *);
/* SymTable_destroy(t);
* Destroys the local symtable in a GNode. */
extern void SymTable_Destroy(SymTable *);
/* Several ways to parse a variable specification. */
/* value = Var_Parse(varspec, ctxt, undef_is_bad, &length, &freeit);
* Parses a variable specification varspec and evaluates it in context
* ctxt. Returns the resulting value, freeit indicates whether it's
* a copy that should be freed when no longer needed. If it's not a
* copy, it's only valid until the next time variables are set.
* The length of the spec is returned in length, e.g., varspec begins
* at the $ and ends at the closing } or ). Returns special value
* var_Error if a problem occurred. */
extern char *Var_Parse(const char *, SymTable *, bool, size_t *,
bool *);
/* Note that var_Error is an instance of the empty string "", so that
* callers who don't care don't need to. */
extern char var_Error[];
/* ok = Var_ParseSkip(&varspec, ctxt, &ok);
* Parses a variable specification and returns true if the varspec
* is correct. Advances pointer past specification. */
extern bool Var_ParseSkip(const char **, SymTable *);
/* ok = Var_ParseBuffer(buf, varspec, ctxt, undef_is_bad, &length);
* Similar to Var_Parse, except the value is directly appended to
* buffer buf. */
extern bool Var_ParseBuffer(Buffer, const char *, SymTable *,
bool, size_t *);
/* The substitution itself */
/* subst = Var_Subst(str, ctxt, undef_is_bad);
* Substitutes all variable values in string str under context ctxt.
* Emit a PARSE_FATAL error if undef_is_bad and an undef variable is
* encountered. The result is always a copy that should be free. */
extern char *Var_Subst(const char *, SymTable *, bool);
/* subst = Var_Substi(str, estr, ctxt, undef_if_bad);
*/
extern char *Var_Substi(const char *, const char *, SymTable *, bool);
/* has_target = Var_Check_for_target(s):
* specialized tweak on Var_Subst that reads through a command line
* and looks for stuff like $@.
* Use to desambiguate a list of targets into a target group.
*/
extern bool Var_Check_for_target(const char *);
/* For loop handling.
* // Create handle for variable name.
* handle = Var_NewLoopVar(name, end);
* // set up buffer
* for (...)
* // Substitute val for variable in str, and accumulate in buffer
* Var_SubstVar(buffer, str, handle, val);
* // Free handle
* Var_DeleteLoopVar(handle);
*/
struct LoopVar; /* opaque handle */
struct LoopVar *Var_NewLoopVar(const char *, const char *);
void Var_DeleteLoopVar(struct LoopVar *);
extern void Var_SubstVar(Buffer, const char *, struct LoopVar *, const char *);
char *Var_LoopVarName(struct LoopVar *);
/* Var_Dump();
* Print out all global variables. */
extern void Var_Dump(void);
/* Var_AddCmdline(name);
* Add all variable values from VAR_CMD to variable name.
* Used to propagate variable values to submakes through MAKEFLAGS. */
extern void Var_AddCmdline(const char *);
/* stuff common to var.c and varparse.c */
extern bool errorIsOkay;
#define VAR_GLOBAL 0
/* Variables defined in a global context, e.g in the Makefile itself */
#define VAR_CMD 1
/* Variables defined on the command line */
#define POISON_INVALID 0
#define POISON_DEFINED 1
#define POISON_NORMAL 64
#define POISON_EMPTY 128
#define POISON_NOT_DEFINED 256
#define VAR_EXEC_LATER 512
extern void Var_Mark(const char *, const char *, unsigned int);
#endif
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