Annotation of src/usr.bin/make/var.h, Revision 1.20
1.1 espie 1: #ifndef VAR_H
2: #define VAR_H
1.20 ! espie 3: /* $OpenBSD: var.h,v 1.19 2016/10/23 14:54:14 espie Exp $ */
1.1 espie 4: /*
5: * Copyright (c) 2001 Marc Espie.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: *
16: * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
17: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
20: * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27: */
28:
1.17 espie 29: extern GNode *current_node;
1.1 espie 30: extern void Var_Init(void);
1.2 espie 31: extern void Var_setCheckEnvFirst(bool);
1.1 espie 32:
1.4 espie 33: /* Global variable handling. */
1.1 espie 34: /* value = Var_Valuei(name, end);
35: * Returns value of global variable name/end, or NULL if inexistent. */
36: extern char *Var_Valuei(const char *, const char *);
37: #define Var_Value(n) Var_Valuei(n, NULL)
1.4 espie 38:
39: /* isDefined = Var_Definedi(name, end);
40: * Checks whether global variable name/end is defined. */
1.2 espie 41: extern bool Var_Definedi(const char *, const char *);
1.1 espie 42:
1.6 espie 43: /* Var_Seti_with_ctxt(name, end, val, ctxt);
1.4 espie 44: * Sets value val of variable name/end. Copies val.
45: * ctxt can be VAR_CMD (command line) or VAR_GLOBAL (normal variable). */
1.6 espie 46: extern void Var_Seti_with_ctxt(const char *, const char *, const char *,
1.2 espie 47: int);
1.6 espie 48: #define Var_Set(n, v) Var_Seti_with_ctxt(n, NULL, v, VAR_GLOBAL)
49: #define Var_Seti(n, e, v) Var_Seti_with_ctxt(n, e, v, VAR_GLOBAL)
50: /* Var_Appendi_with_ctxt(name, end, val, cxt);
1.20 ! espie 51: * Appends value val to variable name/end in global context ctxt,
! 52: * defining it if it does not already exist, and inserting one
! 53: * space otherwise. */
1.6 espie 54: extern void Var_Appendi_with_ctxt(const char *, const char *,
1.2 espie 55: const char *, int);
1.6 espie 56: #define Var_Append(n, v) Var_Appendi_with_ctxt(n, NULL, v, VAR_GLOBAL)
57: #define Var_Appendi(n, e, v) Var_Appendi_with_ctxt(n, e, v, VAR_GLOBAL)
1.9 espie 58:
1.4 espie 59: /* Var_Deletei(name, end);
60: * Deletes a global variable. */
61: extern void Var_Deletei(const char *, const char *);
1.1 espie 62:
1.4 espie 63: /* Dynamic variable indices */
1.1 espie 64: #define TARGET_INDEX 0
65: #define PREFIX_INDEX 1
66: #define ARCHIVE_INDEX 2
67: #define MEMBER_INDEX 3
1.18 natano 68: #define IMPSRC_INDEX 4
69: #define OODATE_INDEX 5
70: #define ALLSRC_INDEX 6
1.12 espie 71:
1.20 ! espie 72: #define Var(idx, gn) ((gn)->localvars.locals[idx])
1.12 espie 73:
1.1 espie 74:
75: /* SymTable_Init(t);
76: * Inits the local symtable in a GNode. */
77: extern void SymTable_Init(SymTable *);
78: /* SymTable_destroy(t);
79: * Destroys the local symtable in a GNode. */
80: extern void SymTable_Destroy(SymTable *);
81:
82: /* Several ways to parse a variable specification. */
83: /* value = Var_Parse(varspec, ctxt, undef_is_bad, &length, &freeit);
84: * Parses a variable specification varspec and evaluates it in context
85: * ctxt. Returns the resulting value, freeit indicates whether it's
86: * a copy that should be freed when no longer needed. If it's not a
87: * copy, it's only valid until the next time variables are set.
88: * The length of the spec is returned in length, e.g., varspec begins
89: * at the $ and ends at the closing } or ). Returns special value
90: * var_Error if a problem occurred. */
91: extern char *Var_Parse(const char *, SymTable *, bool, size_t *,
92: bool *);
93: /* Note that var_Error is an instance of the empty string "", so that
94: * callers who don't care don't need to. */
1.10 espie 95: extern char var_Error[];
1.1 espie 96:
1.5 espie 97: /* ok = Var_ParseSkip(&varspec, ctxt, &ok);
1.8 espie 98: * Parses a variable specification and returns true if the varspec
1.5 espie 99: * is correct. Advances pointer past specification. */
100: extern bool Var_ParseSkip(const char **, SymTable *);
1.1 espie 101:
102: /* ok = Var_ParseBuffer(buf, varspec, ctxt, undef_is_bad, &length);
103: * Similar to Var_Parse, except the value is directly appended to
104: * buffer buf. */
105: extern bool Var_ParseBuffer(Buffer, const char *, SymTable *,
106: bool, size_t *);
107:
108:
109: /* The substitution itself */
110: /* subst = Var_Subst(str, ctxt, undef_is_bad);
111: * Substitutes all variable values in string str under context ctxt.
112: * Emit a PARSE_FATAL error if undef_is_bad and an undef variable is
113: * encountered. The result is always a copy that should be free. */
114: extern char *Var_Subst(const char *, SymTable *, bool);
1.7 espie 115: /* subst = Var_Substi(str, estr, ctxt, undef_if_bad);
116: */
117: extern char *Var_Substi(const char *, const char *, SymTable *, bool);
1.1 espie 118:
1.16 espie 119: /* has_target = Var_Check_for_target(s):
120: * specialized tweak on Var_Subst that reads through a command line
121: * and looks for stuff like $@.
122: * Use to desambiguate a list of targets into a target group.
123: */
124: extern bool Var_Check_for_target(const char *);
1.4 espie 125:
126: /* For loop handling.
127: * // Create handle for variable name.
128: * handle = Var_NewLoopVar(name, end);
129: * // set up buffer
130: * for (...)
131: * // Substitute val for variable in str, and accumulate in buffer
132: * Var_SubstVar(buffer, str, handle, val);
133: * // Free handle
134: * Var_DeleteLoopVar(handle);
135: */
136: struct LoopVar; /* opaque handle */
137: struct LoopVar *Var_NewLoopVar(const char *, const char *);
138: void Var_DeleteLoopVar(struct LoopVar *);
139: extern void Var_SubstVar(Buffer, const char *, struct LoopVar *, const char *);
1.13 espie 140: char *Var_LoopVarName(struct LoopVar *);
1.4 espie 141:
1.1 espie 142:
143: /* Var_Dump();
144: * Print out all global variables. */
145: extern void Var_Dump(void);
146:
147: /* Var_AddCmdline(name);
148: * Add all variable values from VAR_CMD to variable name.
149: * Used to propagate variable values to submakes through MAKEFLAGS. */
150: extern void Var_AddCmdline(const char *);
151:
1.2 espie 152: /* stuff common to var.c and varparse.c */
1.11 espie 153: extern bool errorIsOkay;
1.1 espie 154:
1.4 espie 155: #define VAR_GLOBAL 0
1.2 espie 156: /* Variables defined in a global context, e.g in the Makefile itself */
157: #define VAR_CMD 1
158: /* Variables defined on the command line */
159:
1.4 espie 160: #define POISON_INVALID 0
161: #define POISON_DEFINED 1
1.2 espie 162: #define POISON_NORMAL 64
163: #define POISON_EMPTY 128
164: #define POISON_NOT_DEFINED 256
1.19 espie 165: #define VAR_EXEC_LATER 512
1.1 espie 166:
1.19 espie 167: extern void Var_Mark(const char *, const char *, unsigned int);
1.1 espie 168: #endif
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