| /* |
| * Copyright (c) 2003, 2006, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #include <ctype.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/types.h> |
| #include "jni.h" |
| #include "jli_util.h" |
| #include "version_comp.h" |
| |
| /* |
| * A collection of useful strings. One should think of these as #define |
| * entries, but actual strings can be more efficient (with many compilers). |
| */ |
| static const char *separators = ".-_"; |
| static const char *zero_string = "0"; |
| |
| /* |
| * Validate a string as parsable as a "Java int". If so parsable, |
| * return true (non-zero) and store the numeric value at the address |
| * passed in as "value"; otherwise return false (zero). |
| * |
| * Note that the maximum allowable value is 2147483647 as defined by |
| * the "Java Language Specification" which precludes the use of native |
| * conversion routines which may have other limits. |
| * |
| * Also note that we don't have to worry about the alternate maximum |
| * allowable value of 2147483648 because it is only allowed after |
| * the unary negation operator and this grammar doesn't have one |
| * of those. |
| * |
| * Finally, note that a value which exceeds the maximum jint value will |
| * return false (zero). This results in the otherwise purely numeric |
| * string being compared as a string of characters (as per the spec.) |
| */ |
| static int |
| isjavaint(const char *s, jint *value) |
| { |
| jlong sum = 0; |
| jint digit; |
| while (*s != '\0') |
| if (isdigit(*s)) { |
| digit = (jint)((int)(*s++) - (int)('0')); |
| sum = (sum * 10) + digit; |
| if (sum > 2147483647) |
| return (0); /* Overflows jint (but not jlong) */ |
| } else |
| return (0); |
| *value = (jint)sum; |
| return (1); |
| } |
| |
| /* |
| * Modeled after strcmp(), compare two strings (as in the grammar defined |
| * in Appendix A of JSR 56). If both strings can be interpreted as |
| * Java ints, do a numeric comparison, else it is strcmp(). |
| */ |
| static int |
| comp_string(const char *s1, const char *s2) |
| { |
| jint v1, v2; |
| if (isjavaint(s1, &v1) && isjavaint(s2, &v2)) |
| return ((int)(v1 - v2)); |
| else |
| return (JLI_StrCmp(s1, s2)); |
| } |
| |
| /* |
| * Modeled after strcmp(), compare two version-ids for a Prefix |
| * Match as defined in JSR 56. |
| */ |
| int |
| JLI_PrefixVersionId(const char *id1, char *id2) |
| { |
| char *s1 = JLI_StringDup(id1); |
| char *s2 = JLI_StringDup(id2); |
| char *m1 = s1; |
| char *m2 = s2; |
| char *end1 = NULL; |
| char *end2 = NULL; |
| int res = 0; |
| |
| do { |
| |
| if ((s1 != NULL) && ((end1 = JLI_StrPBrk(s1, ".-_")) != NULL)) |
| *end1 = '\0'; |
| if ((s2 != NULL) && ((end2 = JLI_StrPBrk(s2, ".-_")) != NULL)) |
| *end2 = '\0'; |
| |
| res = comp_string(s1, s2); |
| |
| if (end1 != NULL) |
| s1 = end1 + 1; |
| else |
| s1 = NULL; |
| if (end2 != NULL) |
| s2 = end2 + 1; |
| else |
| s2 = NULL; |
| |
| } while (res == 0 && ((s1 != NULL) && (s2 != NULL))); |
| |
| JLI_MemFree(m1); |
| JLI_MemFree(m2); |
| return (res); |
| } |
| |
| /* |
| * Modeled after strcmp(), compare two version-ids for an Exact |
| * Match as defined in JSR 56. |
| */ |
| int |
| JLI_ExactVersionId(const char *id1, char *id2) |
| { |
| char *s1 = JLI_StringDup(id1); |
| char *s2 = JLI_StringDup(id2); |
| char *m1 = s1; |
| char *m2 = s2; |
| char *end1 = NULL; |
| char *end2 = NULL; |
| int res = 0; |
| |
| do { |
| |
| if ((s1 != NULL) && ((end1 = JLI_StrPBrk(s1, separators)) != NULL)) |
| *end1 = '\0'; |
| if ((s2 != NULL) && ((end2 = JLI_StrPBrk(s2, separators)) != NULL)) |
| *end2 = '\0'; |
| |
| if ((s1 != NULL) && (s2 == NULL)) |
| res = comp_string(s1, zero_string); |
| else if ((s1 == NULL) && (s2 != NULL)) |
| res = comp_string(zero_string, s2); |
| else |
| res = comp_string(s1, s2); |
| |
| if (end1 != NULL) |
| s1 = end1 + 1; |
| else |
| s1 = NULL; |
| if (end2 != NULL) |
| s2 = end2 + 1; |
| else |
| s2 = NULL; |
| |
| } while (res == 0 && ((s1 != NULL) || (s2 != NULL))); |
| |
| JLI_MemFree(m1); |
| JLI_MemFree(m2); |
| return (res); |
| } |
| |
| /* |
| * Return true if this simple-element (as defined in JSR 56) forms |
| * an acceptable match. |
| * |
| * JSR 56 is modified by the Java Web Start <rel> Developer Guide |
| * where it is stated "... Java Web Start will not consider an installed |
| * non-FCS (i.e., milestone) JRE as a match. ... a JRE from Sun |
| * Microsystems, Inc., is by convention a non-FCS (milestone) JRE |
| * if there is a dash (-) in the version string." |
| * |
| * An undocumented caveat to the above is that an exact match with a |
| * hyphen is accepted as a development extension. |
| * |
| * These modifications are addressed by the specific comparisons |
| * for releases with hyphens. |
| */ |
| static int |
| acceptable_simple_element(const char *release, char *simple_element) |
| { |
| char *modifier; |
| modifier = simple_element + JLI_StrLen(simple_element) - 1; |
| if (*modifier == '*') { |
| *modifier = '\0'; |
| if (JLI_StrChr(release, '-')) |
| return ((JLI_StrCmp(release, simple_element) == 0)?1:0); |
| return ((JLI_PrefixVersionId(release, simple_element) == 0)?1:0); |
| } else if (*modifier == '+') { |
| *modifier = '\0'; |
| if (JLI_StrChr(release, '-')) |
| return ((JLI_StrCmp(release, simple_element) == 0)?1:0); |
| return ((JLI_ExactVersionId(release, simple_element) >= 0)?1:0); |
| } else { |
| return ((JLI_ExactVersionId(release, simple_element) == 0)?1:0); |
| } |
| } |
| |
| /* |
| * Return true if this element (as defined in JSR 56) forms |
| * an acceptable match. An element is the intersection (and) |
| * of multiple simple-elements. |
| */ |
| static int |
| acceptable_element(const char *release, char *element) |
| { |
| char *end; |
| do { |
| if ((end = JLI_StrChr(element, '&')) != NULL) |
| *end = '\0'; |
| if (!acceptable_simple_element(release, element)) |
| return (0); |
| if (end != NULL) |
| element = end + 1; |
| } while (end != NULL); |
| return (1); |
| } |
| |
| /* |
| * Checks if release is acceptable by the specification version-string. |
| * Return true if this version-string (as defined in JSR 56) forms |
| * an acceptable match. A version-string is the union (or) of multiple |
| * elements. |
| */ |
| int |
| JLI_AcceptableRelease(const char *release, char *version_string) |
| { |
| char *vs; |
| char *m1; |
| char *end; |
| m1 = vs = JLI_StringDup(version_string); |
| do { |
| if ((end = JLI_StrChr(vs, ' ')) != NULL) |
| *end = '\0'; |
| if (acceptable_element(release, vs)) { |
| JLI_MemFree(m1); |
| return (1); |
| } |
| if (end != NULL) |
| vs = end + 1; |
| } while (end != NULL); |
| JLI_MemFree(m1); |
| return (0); |
| } |
| |
| /* |
| * Return true if this is a valid simple-element (as defined in JSR 56). |
| * |
| * The official grammar for a simple-element is: |
| * |
| * simple-element ::= version-id | version-id modifier |
| * modifier ::= '+' | '*' |
| * version-id ::= string ( separator string )* |
| * string ::= char ( char )* |
| * char ::= Any ASCII character except a space, an |
| * ampersand, a separator or a modifier |
| * separator ::= '.' | '-' | '_' |
| * |
| * However, for efficiency, it is time to abandon the top down parser |
| * implementation. After deleting the potential trailing modifier, we |
| * are left with a version-id. |
| * |
| * Note that a valid version-id has three simple properties: |
| * |
| * 1) Doesn't contain a space, an ampersand or a modifier. |
| * |
| * 2) Doesn't begin or end with a separator. |
| * |
| * 3) Doesn't contain two adjacent separators. |
| * |
| * Any other line noise constitutes a valid version-id. |
| */ |
| static int |
| valid_simple_element(char *simple_element) |
| { |
| char *last; |
| size_t len; |
| |
| if ((simple_element == NULL) || ((len = JLI_StrLen(simple_element)) == 0)) |
| return (0); |
| last = simple_element + len - 1; |
| if (*last == '*' || *last == '+') { |
| if (--len == 0) |
| return (0); |
| *last-- = '\0'; |
| } |
| if (JLI_StrPBrk(simple_element, " &+*") != NULL) /* Property #1 */ |
| return (0); |
| if ((JLI_StrChr(".-_", *simple_element) != NULL) || /* Property #2 */ |
| (JLI_StrChr(".-_", *last) != NULL)) |
| return (0); |
| for (; simple_element != last; simple_element++) /* Property #3 */ |
| if ((JLI_StrChr(".-_", *simple_element) != NULL) && |
| (JLI_StrChr(".-_", *(simple_element + 1)) != NULL)) |
| return (0); |
| return (1); |
| } |
| |
| /* |
| * Return true if this is a valid element (as defined in JSR 56). |
| * An element is the intersection (and) of multiple simple-elements. |
| */ |
| static int |
| valid_element(char *element) |
| { |
| char *end; |
| if ((element == NULL) || (JLI_StrLen(element) == 0)) |
| return (0); |
| do { |
| if ((end = JLI_StrChr(element, '&')) != NULL) |
| *end = '\0'; |
| if (!valid_simple_element(element)) |
| return (0); |
| if (end != NULL) |
| element = end + 1; |
| } while (end != NULL); |
| return (1); |
| } |
| |
| /* |
| * Validates a version string by the extended JSR 56 grammar. |
| */ |
| int |
| JLI_ValidVersionString(char *version_string) |
| { |
| char *vs; |
| char *m1; |
| char *end; |
| if ((version_string == NULL) || (JLI_StrLen(version_string) == 0)) |
| return (0); |
| m1 = vs = JLI_StringDup(version_string); |
| do { |
| if ((end = JLI_StrChr(vs, ' ')) != NULL) |
| *end = '\0'; |
| if (!valid_element(vs)) { |
| JLI_MemFree(m1); |
| return (0); |
| } |
| if (end != NULL) |
| vs = end + 1; |
| } while (end != NULL); |
| JLI_MemFree(m1); |
| return (1); |
| } |
