Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 426 insertions, 0 deletions

diff --git a/soltools/mkdepend/ifparser.c b/soltools/mkdepend/ifparser.c
new file mode 100644
index 000000000..52eb40d2e
--- /dev/null
+++ b/soltools/mkdepend/ifparser.c
@@ -0,0 +1,426 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * $XConsortium: ifparser.c,v 1.8 95/06/03 00:01:41 gildea Exp $
+ *
+ * Copyright 1992 Network Computing Devices, Inc.
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose and without fee is hereby granted, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Network Computing Devices may not be
+ * used in advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission.  Network Computing Devices makes
+ * no representations about the suitability of this software for any purpose.
+ * It is provided ``as is'' without express or implied warranty.
+ *
+ * NETWORK COMPUTING DEVICES DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
+ * IN NO EVENT SHALL NETWORK COMPUTING DEVICES BE LIABLE FOR ANY SPECIAL,
+ * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Author:  Jim Fulton
+ *          Network Computing Devices, Inc.
+ *
+ * Simple if statement processor
+ *
+ * This module can be used to evaluate string representations of C language
+ * if constructs.  It accepts the following grammar:
+ *
+ *     EXPRESSION   :=  VALUE
+ *           |  VALUE  BINOP    EXPRESSION
+ *
+ *     VALUE        :=  '('  EXPRESSION  ')'
+ *           |  '!'  VALUE
+ *           |  '-'  VALUE
+ *           |  'defined'  '('  variable  ')'
+ *           |  'defined'  variable
+ *           |  # variable '(' variable-list ')'
+ *           |  variable
+ *           |  number
+ *
+ *     BINOP        :=  '*' |  '/'  |  '%'
+ *           |  '+' |  '-'
+ *           |  '<<'    |  '>>'
+ *           |  '<' |  '>'  |  '<='  |  '>='
+ *           |  '=='    |  '!='
+ *           |  '&' |  '|'
+ *           |  '&&'    |  '||'
+ *
+ * The normal C order of precedence is supported.
+ *
+ *
+ * External Entry Points:
+ *
+ *     ParseIfExpression        parse a string for #if
+ */
+
+#include "ifparser.h"
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+
+/****************************************************************************
+           Internal Macros and Utilities for Parser
+ ****************************************************************************/
+
+#define DO(val) if (!(val)) return NULL
+#define CALLFUNC(ggg,fff) (*((ggg)->funcs.fff))
+#define SKIPSPACE(ccc) while (isspace((unsigned char)*ccc)) ccc++
+#define isvarfirstletter(ccc) (isalpha((unsigned char)(ccc)) || (ccc) == '_')
+
+
+static const char *
+parse_variable (IfParser *g, const char *cp, const char **varp)
+{
+    SKIPSPACE (cp);
+
+    if (!isvarfirstletter (*cp))
+        return CALLFUNC(g, handle_error) (g, cp, "variable name");
+
+    *varp = cp;
+    /* EMPTY */
+    for (cp++; isalnum((unsigned char)*cp) || *cp == '_'; cp++) ;
+    return cp;
+}
+
+
+static const char *
+parse_number (IfParser *g, const char *cp, int *valp)
+{
+    SKIPSPACE (cp);
+
+    if (!isdigit((unsigned char)*cp))
+        return CALLFUNC(g, handle_error) (g, cp, "number");
+
+#ifdef _WIN32
+    {
+        char *cp2;
+        *valp = strtol(cp, &cp2, 0);
+    }
+#else
+    *valp = atoi (cp);
+    /* EMPTY */
+    for (cp++; isdigit((unsigned char)*cp); cp++) ;
+#endif
+    return cp;
+}
+
+
+static const char *
+parse_value (IfParser *g, const char *cp, int *valp)
+{
+    const char *var;
+
+    *valp = 0;
+
+    SKIPSPACE (cp);
+    if (!*cp)
+        return cp;
+
+    switch (*cp) {
+      case '(':
+        DO (cp = ParseIfExpression (g, cp + 1, valp));
+        SKIPSPACE (cp);
+        if (*cp != ')')
+            return CALLFUNC(g, handle_error) (g, cp, ")");
+
+        return cp + 1;          /* skip the right paren */
+
+      case '!':
+        DO (cp = parse_value (g, cp + 1, valp));
+        *valp = !(*valp);
+        return cp;
+
+      case '-':
+        DO (cp = parse_value (g, cp + 1, valp));
+        *valp = -(*valp);
+        return cp;
+
+      case '#':
+        DO (cp = parse_variable (g, cp + 1, &var));
+        SKIPSPACE (cp);
+        if (*cp != '(')
+            return CALLFUNC(g, handle_error) (g, cp, "(");
+        do {
+            DO (cp = parse_variable (g, cp + 1, &var));
+            SKIPSPACE (cp);
+        } while (*cp && *cp != ')');
+        if (*cp != ')')
+            return CALLFUNC(g, handle_error) (g, cp, ")");
+        *valp = 1; /* XXX */
+        return cp + 1;
+
+      case 'd':
+        if (strncmp (cp, "defined", 7) == 0 && !isalnum((unsigned char)cp[7])) {
+            int paren = 0;
+            size_t len;
+
+            cp += 7;
+            SKIPSPACE (cp);
+            if (*cp == '(') {
+              paren = 1;
+              cp++;
+            }
+            DO (cp = parse_variable (g, cp, &var));
+            len = (size_t)(cp - var);
+            SKIPSPACE (cp);
+            if (paren && *cp != ')')
+                return CALLFUNC(g, handle_error) (g, cp, ")");
+            *valp = (*(g->funcs.eval_defined)) (g, var, len);
+            return cp + paren;      /* skip the right paren */
+        }
+    /* fall out */
+    }
+
+    if (isdigit((unsigned char)*cp)) {
+      DO (cp = parse_number (g, cp, valp));
+    } else if (!isvarfirstletter(*cp))
+      return CALLFUNC(g, handle_error) (g, cp, "variable or number");
+    else {
+      DO (cp = parse_variable (g, cp, &var));
+      *valp = (*(g->funcs.eval_variable)) (g, var, (size_t)(cp - var));
+    }
+
+    return cp;
+}
+
+
+
+static const char *
+parse_product (IfParser *g, const char *cp, int *valp)
+{
+    int rightval;
+
+    DO (cp = parse_value (g, cp, valp));
+    SKIPSPACE (cp);
+
+    switch (*cp) {
+      case '*':
+        DO (cp = parse_product (g, cp + 1, &rightval));
+        *valp = (*valp * rightval);
+        break;
+
+      case '/':
+        DO (cp = parse_product (g, cp + 1, &rightval));
+
+        /* Do nothing in the divide-by-zero case. */
+        if (rightval) {
+            *valp = (*valp / rightval);
+        }
+        break;
+
+      case '%':
+        DO (cp = parse_product (g, cp + 1, &rightval));
+        *valp = (*valp % rightval);
+        break;
+    }
+    return cp;
+}
+
+
+static const char *
+parse_sum (IfParser *g, const char *cp, int *valp)
+{
+    int rightval;
+
+    DO (cp = parse_product (g, cp, valp));
+    SKIPSPACE (cp);
+
+    switch (*cp) {
+      case '+':
+        DO (cp = parse_sum (g, cp + 1, &rightval));
+        *valp = (*valp + rightval);
+        break;
+
+      case '-':
+        DO (cp = parse_sum (g, cp + 1, &rightval));
+        *valp = (*valp - rightval);
+        break;
+    }
+    return cp;
+}
+
+
+static const char *
+parse_shift (IfParser *g, const char *cp, int *valp)
+{
+    int rightval;
+
+    DO (cp = parse_sum (g, cp, valp));
+    SKIPSPACE (cp);
+
+    switch (*cp) {
+      case '<':
+        if (cp[1] == '<') {
+            DO (cp = parse_shift (g, cp + 2, &rightval));
+            *valp = (*valp << rightval);
+        }
+        break;
+
+      case '>':
+        if (cp[1] == '>') {
+            DO (cp = parse_shift (g, cp + 2, &rightval));
+            *valp = (*valp >> rightval);
+        }
+        break;
+    }
+    return cp;
+}
+
+
+static const char *
+parse_inequality (IfParser *g, const char *cp, int *valp)
+{
+    int rightval;
+
+    DO (cp = parse_shift (g, cp, valp));
+    SKIPSPACE (cp);
+
+    switch (*cp) {
+      case '<':
+        if (cp[1] == '=') {
+            DO (cp = parse_inequality (g, cp + 2, &rightval));
+            *valp = (*valp <= rightval);
+        } else {
+            DO (cp = parse_inequality (g, cp + 1, &rightval));
+            *valp = (*valp < rightval);
+        }
+        break;
+
+      case '>':
+        if (cp[1] == '=') {
+            DO (cp = parse_inequality (g, cp + 2, &rightval));
+            *valp = (*valp >= rightval);
+        } else {
+            DO (cp = parse_inequality (g, cp + 1, &rightval));
+            *valp = (*valp > rightval);
+        }
+        break;
+    }
+    return cp;
+}
+
+
+static const char *
+parse_equality (IfParser *g, const char *cp, int *valp)
+{
+    int rightval;
+
+    DO (cp = parse_inequality (g, cp, valp));
+    SKIPSPACE (cp);
+
+    switch (*cp) {
+      case '=':
+        if (cp[1] == '=')
+            cp++;
+        DO (cp = parse_equality (g, cp + 1, &rightval));
+        *valp = (*valp == rightval);
+        break;
+
+      case '!':
+        if (cp[1] != '=')
+            break;
+        DO (cp = parse_equality (g, cp + 2, &rightval));
+        *valp = (*valp != rightval);
+        break;
+    }
+    return cp;
+}
+
+
+static const char *
+parse_band (IfParser *g, const char *cp, int *valp)
+{
+    int rightval;
+
+    DO (cp = parse_equality (g, cp, valp));
+    SKIPSPACE (cp);
+
+    switch (*cp) {
+      case '&':
+        if (cp[1] != '&') {
+            DO (cp = parse_band (g, cp + 1, &rightval));
+            *valp = (*valp & rightval);
+        }
+        break;
+    }
+    return cp;
+}
+
+
+static const char *
+parse_bor (IfParser *g, const char *cp, int *valp)
+{
+    int rightval;
+
+    DO (cp = parse_band (g, cp, valp));
+    SKIPSPACE (cp);
+
+    switch (*cp) {
+      case '|':
+        if (cp[1] != '|') {
+            DO (cp = parse_bor (g, cp + 1, &rightval));
+            *valp = (*valp | rightval);
+        }
+        break;
+    }
+    return cp;
+}
+
+
+static const char *
+parse_land (IfParser *g, const char *cp, int *valp)
+{
+    int rightval;
+
+    DO (cp = parse_bor (g, cp, valp));
+    SKIPSPACE (cp);
+
+    switch (*cp) {
+      case '&':
+        if (cp[1] != '&')
+            return CALLFUNC(g, handle_error) (g, cp, "&&");
+        DO (cp = parse_land (g, cp + 2, &rightval));
+        *valp = (*valp && rightval);
+        break;
+    }
+    return cp;
+}
+
+
+static const char *
+parse_lor (IfParser *g, const char *cp, int *valp)
+{
+    int rightval;
+
+    DO (cp = parse_land (g, cp, valp));
+    SKIPSPACE (cp);
+
+    switch (*cp) {
+      case '|':
+        if (cp[1] != '|')
+            return CALLFUNC(g, handle_error) (g, cp, "||");
+        DO (cp = parse_lor (g, cp + 2, &rightval));
+        *valp = (*valp || rightval);
+        break;
+    }
+    return cp;
+}
+
+
+/****************************************************************************
+                 External Entry Points
+ ****************************************************************************/
+
+const char *
+ParseIfExpression (IfParser *g, const char *cp, int *valp)
+{
+    return parse_lor (g, cp, valp);
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */