diff options
Diffstat (limited to 'generic')
| -rw-r--r-- | generic/tclPkg.c | 127 |
1 files changed, 89 insertions, 38 deletions
diff --git a/generic/tclPkg.c b/generic/tclPkg.c index 0ff2b7c..ab4c397 100644 --- a/generic/tclPkg.c +++ b/generic/tclPkg.c @@ -10,7 +10,7 @@ * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tclPkg.c,v 1.16 2006/09/22 18:13:28 andreas_kupries Exp $ + * RCS: @(#) $Id: tclPkg.c,v 1.17 2006/09/27 20:22:40 andreas_kupries Exp $ * * TIP #268. * Heavily rewritten to handle the extend version numbers, and extended @@ -58,13 +58,13 @@ typedef struct Package { static int CheckVersionAndConvert(Tcl_Interp *interp, CONST char *string, char** internal, int* stable); -static int CompareVersions(CONST char *v1i, CONST char *v2i, +static int CompareVersions(char *v1i, char *v2i, int *isMajorPtr); static int CheckRequirement(Tcl_Interp *interp, CONST char *string); static int CheckAllRequirements(Tcl_Interp* interp, int reqc, Tcl_Obj *CONST reqv[]); -static int RequirementSatisfied(CONST char *havei, CONST char *req); -static int AllRequirementsSatisfied(CONST char *havei, +static int RequirementSatisfied(char *havei, CONST char *req); +static int AllRequirementsSatisfied(char *havei, int reqc, Tcl_Obj *CONST reqv[]); static void AddRequirementsToResult(Tcl_Interp* interp, int reqc, Tcl_Obj *CONST reqv[]); @@ -1302,14 +1302,15 @@ CheckVersionAndConvert( static int CompareVersions( - CONST char *v1, /* Versions strings, of form 2.1.3 (any number */ - CONST char *v2, /* of version numbers). */ + char *v1, /* Versions strings, of form 2.1.3 (any number */ + char *v2, /* of version numbers). */ int *isMajorPtr) /* If non-null, the word pointed to is filled * in with a 0/1 value. 1 means that the difference * occured in the first element. */ { - int thisIsMajor, n1, n2; + int thisIsMajor; int res, flip; + char* s1, *e1, *s2, *e2, o1, o2; /* * Each iteration of the following loop processes one number from each @@ -1325,57 +1326,107 @@ CompareVersions( * compare numerics, the separators, and also deal with the special case * of end-of-string compared to separators. The semi-list rep we get here * is much easier to handle, as it is still regular. + * + * Rewritten to not compute a numeric value for the extracted version + * number, but do string comparison. Skip any leading zeros for that to + * work. This change breaks through the 32bit-limit on version numbers. */ thisIsMajor = 1; + s1 = v1; + s2 = v2; + while (1) { /* * Parse one decimal number from the front of each string. + * Skip leading zeros. Terminate found number for upcoming + * string-wise comparison, if needed. + */ + + while ((*s1 != 0) && (*s1 == '0')) { s1 ++; } + while ((*s2 != 0) && (*s2 == '0')) { s2 ++; } + + /* + * s1, s2 now point to the beginnings of the numbers to compare. Test + * for their signs first, as shortcut to the result (different signs), + * or determines if result has to be flipped (both negative). If there + * is no shortcut we have to insert terminators later to limit the + * strcmp. */ - n1 = n2 = 0; - flip = 0; - while ((*v1 != 0) && (*v1 != ' ')) { - if (*v1 == '-') {flip = 1 ; v1++ ; continue;} - n1 = 10*n1 + (*v1 - '0'); - v1++; + if ((*s1 == '-') && (*s2 != '-')) { + /* s1 < 0, s2 >= 0 => s1 < s2 */ + res = -1; + break; } - if (flip) n1 = -n1; - flip = 0; - while ((*v2 != 0) && (*v2 != ' ')) { - if (*v2 == '-') {flip = 1; v2++ ; continue;} - n2 = 10*n2 + (*v2 - '0'); - v2++; + if ((*s1 != '-') && (*s2 == '-')) { + /* s1 >= 0, s2 < 0 => s1 > s2 */ + res = 1; + break; } - if (flip) n2 = -n2; + + if ((*s1 == '-') && (*s2 == '-')) { + /* a < b => -a > -b, etc. */ + s1 ++; + s2 ++; + flip = 1; + } else { + flip = 0; + } + + /* + * The string comparison is needed, so now we determine where the + * numbers end. + */ + + e1 = s1; while ((*e1 != 0) && (*e1 != ' ')) { e1 ++; } + e2 = s2; while ((*e2 != 0) && (*e2 != ' ')) { e2 ++; } /* - * Compare and go on to the next version number if the current numbers - * match. + * s1 .. e1 and s2 .. e2 now bracket the numbers to compare. + * Insert terminators, compare, and restore actual contents. */ - if (n1 != n2) { + o1 = *e1 ; *e1 = '\0'; + o2 = *e2 ; *e2 = '\0'; + + res = strcmp (s1, s2); + + *e1 = o1; + *e2 = o2; + + /* + * Stop comparing segments when a difference has been found. Here we + * may have to flip the result to account for signs. + */ + + if (res != 0) { + if (flip) res = -res; break; } - if (*v1 != 0) { - v1++; - } else if (*v2 == 0) { + + /* + * Go on to the next version number if the current numbers match. + * However stop processing if the end of both numbers has been + * reached. + */ + + s1 = e1; + s2 = e2; + + if (*s1 != 0) { + s1++; + } else if (*s2 == 0) { + /* s1, s2 both at the end => identical */ + res = 0; break; } - if (*v2 != 0) { - v2++; + if (*s2 != 0) { + s2++; } thisIsMajor = 0; } - if (n1 > n2) { - res = 1; - } else if (n1 == n2) { - res = 0; - } else { - res = -1; - } - if (isMajorPtr != NULL) { *isMajorPtr = thisIsMajor; } @@ -1564,7 +1615,7 @@ AddRequirementsToDString( static int AllRequirementsSatisfied( - CONST char* availVersionI, /* Candidate version to check against the requirements */ + char* availVersionI, /* Candidate version to check against the requirements */ int reqc, /* Requirements constraining the desired version. */ Tcl_Obj *CONST reqv[]) /* 0 means to use the latest version available. */ { @@ -1598,7 +1649,7 @@ AllRequirementsSatisfied( static int RequirementSatisfied( - CONST char *havei, /* Version string, of candidate package we have */ + char *havei, /* Version string, of candidate package we have */ CONST char *req) /* Requirement string the candidate has to satisfy */ { /* The have candidate is already in internal rep. */ |