Annotation of src/usr.bin/make/var.h, Revision 1.16
1.1 espie 1: #ifndef VAR_H
2: #define VAR_H
1.16 ! espie 3: /* $OpenBSD: var.h,v 1.15 2012/10/02 10:29:31 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:
29: extern void Var_Init(void);
1.2 espie 30: extern void Var_setCheckEnvFirst(bool);
1.1 espie 31:
1.4 espie 32: /* Global variable handling. */
1.1 espie 33: /* value = Var_Valuei(name, end);
34: * Returns value of global variable name/end, or NULL if inexistent. */
35: extern char *Var_Valuei(const char *, const char *);
36: #define Var_Value(n) Var_Valuei(n, NULL)
1.4 espie 37:
38: /* isDefined = Var_Definedi(name, end);
39: * Checks whether global variable name/end is defined. */
1.2 espie 40: extern bool Var_Definedi(const char *, const char *);
1.1 espie 41:
1.6 espie 42: /* Var_Seti_with_ctxt(name, end, val, ctxt);
1.4 espie 43: * Sets value val of variable name/end. Copies val.
44: * ctxt can be VAR_CMD (command line) or VAR_GLOBAL (normal variable). */
1.6 espie 45: extern void Var_Seti_with_ctxt(const char *, const char *, const char *,
1.2 espie 46: int);
1.6 espie 47: #define Var_Set(n, v) Var_Seti_with_ctxt(n, NULL, v, VAR_GLOBAL)
48: #define Var_Seti(n, e, v) Var_Seti_with_ctxt(n, e, v, VAR_GLOBAL)
49: /* Var_Appendi_with_ctxt(name, end, val, cxt);
1.1 espie 50: * Appends value val to variable name/end in context ctxt, defining it
51: * if it does not already exist, and inserting one space otherwise. */
1.6 espie 52: extern void Var_Appendi_with_ctxt(const char *, const char *,
1.2 espie 53: const char *, int);
1.6 espie 54: #define Var_Append(n, v) Var_Appendi_with_ctxt(n, NULL, v, VAR_GLOBAL)
55: #define Var_Appendi(n, e, v) Var_Appendi_with_ctxt(n, e, v, VAR_GLOBAL)
1.9 espie 56:
1.4 espie 57: /* Var_Deletei(name, end);
58: * Deletes a global variable. */
59: extern void Var_Deletei(const char *, const char *);
1.1 espie 60:
1.4 espie 61: /* Dynamic variable indices */
1.1 espie 62: #define TARGET_INDEX 0
63: #define PREFIX_INDEX 1
64: #define ARCHIVE_INDEX 2
65: #define MEMBER_INDEX 3
66: #define OODATE_INDEX 4
67: #define ALLSRC_INDEX 5
68: #define IMPSRC_INDEX 6
1.12 espie 69:
70: #define Var(idx, gn) ((gn)->context.locals[idx])
71:
1.1 espie 72:
73: /* SymTable_Init(t);
74: * Inits the local symtable in a GNode. */
75: extern void SymTable_Init(SymTable *);
76: /* SymTable_destroy(t);
77: * Destroys the local symtable in a GNode. */
78: extern void SymTable_Destroy(SymTable *);
79:
80: /* Several ways to parse a variable specification. */
81: /* value = Var_Parse(varspec, ctxt, undef_is_bad, &length, &freeit);
82: * Parses a variable specification varspec and evaluates it in context
83: * ctxt. Returns the resulting value, freeit indicates whether it's
84: * a copy that should be freed when no longer needed. If it's not a
85: * copy, it's only valid until the next time variables are set.
86: * The length of the spec is returned in length, e.g., varspec begins
87: * at the $ and ends at the closing } or ). Returns special value
88: * var_Error if a problem occurred. */
89: extern char *Var_Parse(const char *, SymTable *, bool, size_t *,
90: bool *);
91: /* Note that var_Error is an instance of the empty string "", so that
92: * callers who don't care don't need to. */
1.10 espie 93: extern char var_Error[];
1.1 espie 94:
1.5 espie 95: /* ok = Var_ParseSkip(&varspec, ctxt, &ok);
1.8 espie 96: * Parses a variable specification and returns true if the varspec
1.5 espie 97: * is correct. Advances pointer past specification. */
98: extern bool Var_ParseSkip(const char **, SymTable *);
1.1 espie 99:
100: /* ok = Var_ParseBuffer(buf, varspec, ctxt, undef_is_bad, &length);
101: * Similar to Var_Parse, except the value is directly appended to
102: * buffer buf. */
103: extern bool Var_ParseBuffer(Buffer, const char *, SymTable *,
104: bool, size_t *);
105:
106:
107: /* The substitution itself */
108: /* subst = Var_Subst(str, ctxt, undef_is_bad);
109: * Substitutes all variable values in string str under context ctxt.
110: * Emit a PARSE_FATAL error if undef_is_bad and an undef variable is
111: * encountered. The result is always a copy that should be free. */
112: extern char *Var_Subst(const char *, SymTable *, bool);
1.7 espie 113: /* subst = Var_Substi(str, estr, ctxt, undef_if_bad);
114: */
115: extern char *Var_Substi(const char *, const char *, SymTable *, bool);
1.1 espie 116:
1.16 ! espie 117: /* has_target = Var_Check_for_target(s):
! 118: * specialized tweak on Var_Subst that reads through a command line
! 119: * and looks for stuff like $@.
! 120: * Use to desambiguate a list of targets into a target group.
! 121: */
! 122: extern bool Var_Check_for_target(const char *);
1.4 espie 123:
124: /* For loop handling.
125: * // Create handle for variable name.
126: * handle = Var_NewLoopVar(name, end);
127: * // set up buffer
128: * for (...)
129: * // Substitute val for variable in str, and accumulate in buffer
130: * Var_SubstVar(buffer, str, handle, val);
131: * // Free handle
132: * Var_DeleteLoopVar(handle);
133: */
134: struct LoopVar; /* opaque handle */
135: struct LoopVar *Var_NewLoopVar(const char *, const char *);
136: void Var_DeleteLoopVar(struct LoopVar *);
137: extern void Var_SubstVar(Buffer, const char *, struct LoopVar *, const char *);
1.13 espie 138: char *Var_LoopVarName(struct LoopVar *);
1.4 espie 139:
1.1 espie 140:
141: /* Var_Dump();
142: * Print out all global variables. */
143: extern void Var_Dump(void);
144:
145: /* Var_AddCmdline(name);
146: * Add all variable values from VAR_CMD to variable name.
147: * Used to propagate variable values to submakes through MAKEFLAGS. */
148: extern void Var_AddCmdline(const char *);
149:
1.2 espie 150: /* stuff common to var.c and varparse.c */
1.11 espie 151: extern bool errorIsOkay;
1.1 espie 152:
1.4 espie 153: #define VAR_GLOBAL 0
1.2 espie 154: /* Variables defined in a global context, e.g in the Makefile itself */
155: #define VAR_CMD 1
156: /* Variables defined on the command line */
157:
1.4 espie 158: #define POISON_INVALID 0
159: #define POISON_DEFINED 1
1.2 espie 160: #define POISON_NORMAL 64
161: #define POISON_EMPTY 128
162: #define POISON_NOT_DEFINED 256
1.1 espie 163:
1.2 espie 164: extern void Var_MarkPoisoned(const char *, const char *, unsigned int);
1.1 espie 165: #endif
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