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[src/trunk]: src/usr.bin/make make(1): extract ParseVarnameLong from Var_Parse
details: https://anonhg.NetBSD.org/src/rev/e10f6fc31645
branches: trunk
changeset: 945504:e10f6fc31645
user: rillig <rillig%NetBSD.org@localhost>
date: Sat Oct 31 14:40:34 2020 +0000
description:
make(1): extract ParseVarnameLong from Var_Parse
diffstat:
usr.bin/make/var.c | 249 +++++++++++++++++++++++++++++++---------------------
1 files changed, 148 insertions(+), 101 deletions(-)
diffs (282 lines):
diff -r 4bc917a40194 -r e10f6fc31645 usr.bin/make/var.c
--- a/usr.bin/make/var.c Sat Oct 31 14:39:31 2020 +0000
+++ b/usr.bin/make/var.c Sat Oct 31 14:40:34 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: var.c,v 1.622 2020/10/31 14:12:01 rillig Exp $ */
+/* $NetBSD: var.c,v 1.623 2020/10/31 14:40:34 rillig Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1993
@@ -129,7 +129,7 @@
#include "metachar.h"
/* "@(#)var.c 8.3 (Berkeley) 3/19/94" */
-MAKE_RCSID("$NetBSD: var.c,v 1.622 2020/10/31 14:12:01 rillig Exp $");
+MAKE_RCSID("$NetBSD: var.c,v 1.623 2020/10/31 14:40:34 rillig Exp $");
#define VAR_DEBUG1(fmt, arg1) DEBUG1(VAR, fmt, arg1)
#define VAR_DEBUG2(fmt, arg1, arg2) DEBUG2(VAR, fmt, arg1, arg2)
@@ -3507,6 +3507,145 @@
return TRUE;
}
+/* Parse a long variable name enclosed in braces or parentheses such as $(VAR)
+ * or ${VAR}, up to the closing brace or parenthesis, or in the case of
+ * ${VAR:Modifiers}, up to the ':' that starts the modifiers.
+ * Return whether to continue parsing. */
+static Boolean
+ParseVarnameLong(
+ const char **const pp,
+ char const startc,
+ GNode *const ctxt,
+ VarEvalFlags const eflags,
+
+ VarParseResult *const out_FALSE_res,
+ const char **const out_FALSE_val,
+ void **const out_FALSE_freePtr,
+
+ char *const out_TRUE_endc,
+ const char **const out_TRUE_p,
+ Var **const out_TRUE_v,
+ Boolean *const out_TRUE_haveModifier,
+ const char **const out_TRUE_extraModifiers,
+ Boolean *const out_TRUE_dynamic,
+ VarExprFlags *const out_TRUE_exprFlags
+) {
+ size_t namelen;
+ char *varname;
+ Var *v;
+ Boolean haveModifier;
+ Boolean dynamic = FALSE;
+
+ const char *const start = *pp;
+ char endc = startc == '(' ? ')' : '}';
+
+ const char *p = start + 2;
+ varname = ParseVarname(&p, startc, endc, ctxt, eflags, &namelen);
+
+ if (*p == ':') {
+ haveModifier = TRUE;
+ } else if (*p == endc) {
+ haveModifier = FALSE;
+ } else {
+ Parse_Error(PARSE_FATAL, "Unclosed variable \"%s\"", varname);
+ *pp = p;
+ free(varname);
+ *out_FALSE_val = var_Error;
+ *out_FALSE_res = VPR_PARSE_MSG;
+ return FALSE;
+ }
+
+ v = VarFind(varname, ctxt, TRUE);
+
+ /* At this point, p points just after the variable name,
+ * either at ':' or at endc. */
+
+ /*
+ * Check also for bogus D and F forms of local variables since we're
+ * in a local context and the name is the right length.
+ */
+ if (v == NULL && ctxt != VAR_CMDLINE && ctxt != VAR_GLOBAL &&
+ namelen == 2 && (varname[1] == 'F' || varname[1] == 'D') &&
+ strchr("@%?*!<>", varname[0]) != NULL)
+ {
+ /*
+ * Well, it's local -- go look for it.
+ */
+ char name[] = { varname[0], '\0' };
+ v = VarFind(name, ctxt, 0);
+
+ if (v != NULL) {
+ if (varname[1] == 'D') {
+ *out_TRUE_extraModifiers = "H:";
+ } else { /* F */
+ *out_TRUE_extraModifiers = "T:";
+ }
+ }
+ }
+
+ if (v == NULL) {
+ dynamic = VarIsDynamic(ctxt, varname, namelen);
+
+ if (!haveModifier) {
+ p++; /* skip endc */
+ *pp = p;
+ if (dynamic) {
+ char *pstr = bmake_strsedup(start, p);
+ free(varname);
+ *out_FALSE_res = VPR_OK;
+ *out_FALSE_freePtr = pstr;
+ *out_FALSE_val = pstr;
+ return FALSE;
+ }
+
+ if ((eflags & VARE_UNDEFERR) && (eflags & VARE_WANTRES) &&
+ DEBUG(LINT))
+ {
+ Parse_Error(PARSE_FATAL, "Variable \"%s\" is undefined",
+ varname);
+ free(varname);
+ *out_FALSE_res = VPR_UNDEF_MSG;
+ *out_FALSE_val = var_Error;
+ return FALSE;
+ }
+
+ if (eflags & VARE_UNDEFERR) {
+ free(varname);
+ *out_FALSE_res = VPR_UNDEF_SILENT;
+ *out_FALSE_val = var_Error;
+ return FALSE;
+ }
+
+ free(varname);
+ *out_FALSE_res = VPR_OK;
+ *out_FALSE_val = varUndefined;
+ return FALSE;
+ }
+
+ /* The variable expression is based on an undefined variable.
+ * Nevertheless it needs a Var, for modifiers that access the
+ * variable name, such as :L or :?.
+ *
+ * Most modifiers leave this expression in the "undefined" state
+ * (VEF_UNDEF), only a few modifiers like :D, :U, :L, :P turn this
+ * undefined expression into a defined expression (VEF_DEF).
+ *
+ * At the end, after applying all modifiers, if the expression
+ * is still undefined, Var_Parse will return an empty string
+ * instead of the actually computed value. */
+ v = VarNew(varname, varname, "", 0);
+ *out_TRUE_exprFlags = VEF_UNDEF;
+ } else
+ free(varname);
+
+ *out_TRUE_endc = endc;
+ *out_TRUE_p = p;
+ *out_TRUE_v = v;
+ *out_TRUE_haveModifier = haveModifier;
+ *out_TRUE_dynamic = dynamic;
+ return TRUE;
+}
+
/*-
*-----------------------------------------------------------------------
* Var_Parse --
@@ -3589,110 +3728,18 @@
startc = start[1];
if (startc != '(' && startc != '{') {
- VarParseResult res;
+ VarParseResult res;
if (!ParseVarnameShort(startc, pp, ctxt, eflags, out_val, &res, &v))
return res;
haveModifier = FALSE;
p = start + 1;
} else {
- size_t namelen;
- char *varname;
-
- endc = startc == '(' ? ')' : '}';
-
- p = start + 2;
- varname = ParseVarname(&p, startc, endc, ctxt, eflags, &namelen);
-
- if (*p == ':') {
- haveModifier = TRUE;
- } else if (*p == endc) {
- haveModifier = FALSE;
- } else {
- Parse_Error(PARSE_FATAL, "Unclosed variable \"%s\"", varname);
- *pp = p;
- free(varname);
- *out_val = var_Error;
- return VPR_PARSE_MSG;
- }
-
- v = VarFind(varname, ctxt, TRUE);
-
- /* At this point, p points just after the variable name,
- * either at ':' or at endc. */
-
- /*
- * Check also for bogus D and F forms of local variables since we're
- * in a local context and the name is the right length.
- */
- if (v == NULL && ctxt != VAR_CMDLINE && ctxt != VAR_GLOBAL &&
- namelen == 2 && (varname[1] == 'F' || varname[1] == 'D') &&
- strchr("@%?*!<>", varname[0]) != NULL)
- {
- /*
- * Well, it's local -- go look for it.
- */
- char name[] = { varname[0], '\0' };
- v = VarFind(name, ctxt, 0);
-
- if (v != NULL) {
- if (varname[1] == 'D') {
- extramodifiers = "H:";
- } else { /* F */
- extramodifiers = "T:";
- }
- }
- }
-
- if (v == NULL) {
- dynamic = VarIsDynamic(ctxt, varname, namelen);
-
- if (!haveModifier) {
- p++; /* skip endc */
- *pp = p;
- if (dynamic) {
- char *pstr = bmake_strsedup(start, p);
- *freePtr = pstr;
- free(varname);
- *out_val = pstr;
- return VPR_OK;
- }
-
- if ((eflags & VARE_UNDEFERR) && (eflags & VARE_WANTRES) &&
- DEBUG(LINT))
- {
- Parse_Error(PARSE_FATAL, "Variable \"%s\" is undefined",
- varname);
- free(varname);
- *out_val = var_Error;
- return VPR_UNDEF_MSG;
- }
-
- if (eflags & VARE_UNDEFERR) {
- free(varname);
- *out_val = var_Error;
- return VPR_UNDEF_SILENT;
- }
-
- free(varname);
- *out_val = varUndefined;
- return VPR_OK;
- }
-
- /* The variable expression is based on an undefined variable.
- * Nevertheless it needs a Var, for modifiers that access the
- * variable name, such as :L or :?.
- *
- * Most modifiers leave this expression in the "undefined" state
- * (VEF_UNDEF), only a few modifiers like :D, :U, :L, :P turn this
- * undefined expression into a defined expression (VEF_DEF).
- *
- * At the end, after applying all modifiers, if the expression
- * is still undefined, Var_Parse will return an empty string
- * instead of the actually computed value. */
- v = VarNew(varname, varname, "", 0);
- exprFlags = VEF_UNDEF;
- } else
- free(varname);
+ VarParseResult res;
+ if (!ParseVarnameLong(pp, startc, ctxt, eflags,
+ &res, out_val, freePtr,
+ &endc, &p, &v, &haveModifier, &extramodifiers,
+ &dynamic, &exprFlags))
+ return res;
}
if (v->flags & VAR_IN_USE)
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