From ce335e84938eeab479a88bf46478d082eff2de3b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Per=20=C3=98yvind=20Karlsen?= <peroyvind@mandriva.org>
Date: Tue, 12 Oct 2010 23:34:33 +0000
Subject: * add support for fetching disttag & distepoch with
 get_fullname_parts() * refactorize get_fullname_parts() and friends using it

---
 URPM.xs | 372 ++++++++++++++++++++++++++++++----------------------------------
 1 file changed, 173 insertions(+), 199 deletions(-)

diff --git a/URPM.xs b/URPM.xs
index 43b0e4a..87f687a 100644
--- a/URPM.xs
+++ b/URPM.xs
@@ -120,6 +120,25 @@ int rpmError_callback() {
 
 static int rpm_codeset_is_utf8 = 0;
 
+static struct s_backup {
+    char *ptr;
+    char chr;
+} char_backups[32];
+
+static int BI = 0;
+
+static void
+backup_char(char *c) {
+      char_backups[BI].chr = *c,
+      *(char_backups[BI++].ptr = &(*c)) = 0; /* mark end of string to enable searching backwards */
+}
+
+static void
+restore_chars() {
+    for(; BI > 0; char_backups[BI].ptr = NULL)
+	BI--, *char_backups[BI].ptr = char_backups[BI].chr;
+}
+
 static SV*
 newSVpv_utf8(const char *s, STRLEN len)
 {
@@ -128,31 +147,6 @@ newSVpv_utf8(const char *s, STRLEN len)
   return sv;
 }
 
-static void
-get_fullname_parts(URPM__Package pkg, char **name, char **version, char **release, char **arch, char **eos) {
-  char *_version = NULL, *_release = NULL, *_arch = NULL, *_eos = NULL;
-
-  if ((_eos = strchr(pkg->info, '@')) != NULL) {
-    *_eos = 0; /* mark end of string to enable searching backwards */
-    if ((_arch = strrchr(pkg->info, '.')) != NULL) {
-      *_arch = 0;
-      if ((release != NULL || version != NULL || name != NULL) && (_release = strrchr(pkg->info, '-')) != NULL) {
-	*_release = 0;
-	if ((version != NULL || name != NULL) && (_version = strrchr(pkg->info, '-')) != NULL) {
-	  if (name != NULL) *name = pkg->info;
-	  if (version != NULL) *version = _version + 1;
-	}
-	if (release != NULL) *release = _release + 1;
-	*_release = '-';
-      }
-      if (arch != NULL) *arch = _arch + 1;
-      *_arch = '.';
-    }
-    if (eos != NULL) *eos = _eos;
-    *_eos = '@';
-  }
-}
-
 /* Since the NVRA format won't change, we'll store it in a global variable so
  * that we only have to expand the macro once.
  */
@@ -227,6 +221,60 @@ get_int(Header header, rpmTag tag) {
   return (val->t == RPM_UINT32_TYPE) ? val->p.ui32p[val->ix >= 0 ? val->ix : 0] : 0;
 }
 
+static int
+get_fullname_parts(URPM__Package pkg, char **name, int *epoch, char **version, char **release, char **disttag, char **distepoch, char **arch, char **eos) {
+  char *_version = NULL, *_release = NULL, *_disttag = NULL, *_distepoch = NULL, *_arch = NULL, *_eos = NULL, *tmp = NULL;
+
+  if(pkg->info) {
+    if ((_eos = strchr(pkg->info, '@')) != NULL) {
+      backup_char(_eos);
+      if (eos != NULL) *eos = _eos+1;
+      if (epoch != NULL) *epoch = isdigit(_eos[1]) ? atoi(_eos+1) : 0;
+      if ((_arch = strrchr(pkg->info, '.')) != NULL) {
+	backup_char(_arch);
+	if (arch != NULL) *arch = _arch + 1;	      
+	if (distepoch != NULL || disttag != NULL || release != NULL || version != NULL || name != NULL) {
+	  if((_distepoch = strchr(strrchr(pkg->provides, '-'), ':')) != NULL) {
+	    tmp = strrchr(_distepoch+1, ']');
+	    backup_char(tmp);
+	    tmp = strstr(pkg->info, _distepoch+1);
+	    backup_char(tmp);
+	  }
+	  if(distepoch != NULL) *distepoch = _distepoch ? _distepoch+1 : NULL;
+	  if (disttag != NULL || release != NULL || version != NULL || name != NULL) {
+	    if ((_disttag = strrchr(pkg->info, '-')) != NULL && (strstr(pkg->provides, _disttag)) == NULL) {
+	      backup_char(_disttag);
+	    } else _disttag = NULL;
+	    if (disttag != NULL) *disttag = _disttag ? _disttag + 1: NULL;
+	    if ((release != NULL || version != NULL || name != NULL) && (_release = strrchr(pkg->info, '-')) != NULL) {
+	      backup_char(_release);
+	      if (release != NULL) *release = _release + 1;			  
+	      if ((version != NULL || name != NULL) && (_version = strrchr(pkg->info, '-')) != NULL) {
+		backup_char(_version);
+		if (version != NULL) *version = _version + 1;
+		if (name != NULL) *name = pkg->info;
+	      }
+	    }
+	  }
+	}
+      }
+    }
+  }
+  else if(pkg->h) {
+    if (name != NULL) *name = (char*)get_name(pkg->h, RPMTAG_NAME);
+    if (epoch != NULL) *epoch = get_int(pkg->h, RPMTAG_EPOCH);
+    if (version != NULL) *version = (char*)get_name(pkg->h, RPMTAG_VERSION);
+    if (release != NULL) *release = (char*)get_name(pkg->h, RPMTAG_RELEASE);
+    if (disttag != NULL) *disttag = (char*)get_name(pkg->h, RPMTAG_DISTTAG);
+    if (distepoch != NULL) *distepoch = (char*)get_name(pkg->h, RPMTAG_DISTEPOCH);
+    if (arch != NULL) *arch = headerIsEntry(pkg->h, RPMTAG_SOURCERPM) ? (char*)get_name(pkg->h, RPMTAG_ARCH) : "src";
+    if (eos != NULL) *eos = NULL;
+  }
+  else
+    return 1;
+  return 0;
+}
+
 static int
 sigsize_to_filesize(int sigsize) {
   return sigsize + 440; /* 440 is the rpm header size (?) empirical, but works */
@@ -644,36 +692,61 @@ return_list_tag(URPM__Package pkg, rpmTag tag_name) {
     }
   } else {
     char *name;
+    int epoch;
     char *version;
     char *release;
+    char *disttag;
+    char *distepoch;
+
     char *arch;
     char *eos;
     switch (tag_name) {
       case RPMTAG_NAME:
 	{
-	  get_fullname_parts(pkg, &name, &version, &release, &arch, &eos);
-	  if (version - name < 1) croak("invalid fullname");
-	  XPUSHs(sv_2mortal(newSVpv(name, version-name - 1)));
+	  if(get_fullname_parts(pkg, &name, &epoch, &version, &release, &arch, &disttag, &distepoch, &eos))
+	    croak("invalid fullname");
+	  XPUSHs(sv_2mortal(newSVpv(name, 0)));
 	}
 	break;
+      case RPMTAG_EPOCH: {
+	  if(get_fullname_parts(pkg, &name, &epoch, &version, &release, &arch, &disttag, &distepoch, &eos))
+	    croak("invalid fullname");
+	  XPUSHs(sv_2mortal(newSViv(epoch)));
+	}
       case RPMTAG_VERSION:
 	{
-	  get_fullname_parts(pkg, &name, &version, &release, &arch, &eos);
-	  if (release - version < 1) croak("invalid fullname");
-	  XPUSHs(sv_2mortal(newSVpv(version, release-version - 1)));
+	  if(get_fullname_parts(pkg, &name, &epoch, &version, &release, &arch, &disttag, &distepoch, &eos))
+	    croak("invalid fullname");
+	  XPUSHs(sv_2mortal(newSVpv(version, 0)));
 	}
 	break;
       case RPMTAG_RELEASE:
 	{
-	  get_fullname_parts(pkg, &name, &version, &release, &arch, &eos);
-	  if (arch - release < 1) croak("invalid fullname");
-	  XPUSHs(sv_2mortal(newSVpv(release, arch-release - 1)));
+	  if(get_fullname_parts(pkg, &name, &epoch, &version, &release, &arch, &disttag, &distepoch, &eos))
+	    croak("invalid fullname");
+	  XPUSHs(sv_2mortal(newSVpv(release, 0)));
+
+	}
+	break;
+      case RPMTAG_DISTTAG:
+	{
+	  if(get_fullname_parts(pkg, &name, &epoch, &version, &release, &arch, &disttag, &distepoch, &eos))
+	    croak("invalid fullname");
+	  XPUSHs(sv_2mortal(newSVpv(disttag, 0)));
+	}
+	break;
+      case RPMTAG_DISTEPOCH:
+	{
+	  if(get_fullname_parts(pkg, &name, &epoch, &version, &release, &arch, &disttag, &distepoch, &eos))
+	    croak("invalid fullname");
+	  XPUSHs(sv_2mortal(newSVpv(distepoch, 0)));
 	}
 	break;
       case RPMTAG_ARCH:
 	{
-	  get_fullname_parts(pkg, &name, &version, &release, &arch, &eos);
-	  XPUSHs(sv_2mortal(newSVpv(arch, eos-arch)));
+	  if(get_fullname_parts(pkg, &name, &epoch, &version, &release, &arch, &disttag, &distepoch, &eos))
+	    croak("invalid fullname");
+	  XPUSHs(sv_2mortal(newSVpv(arch, 0)));
 	}
 	break;
       case RPMTAG_SUMMARY:
@@ -683,6 +756,7 @@ return_list_tag(URPM__Package pkg, rpmTag tag_name) {
 	croak("unexpected tag");
 	break;
     }
+    restore_chars();
   }
   PUTBACK;
 }
@@ -1545,60 +1619,44 @@ void
 Pkg_name(pkg)
   URPM::Package pkg
   PPCODE:
-  if (pkg->info) {
-    char *name;
-    char *version;
+  char *name;
 
-    get_fullname_parts(pkg, &name, &version, NULL, NULL, NULL);
-    if (version - name < 1) croak("invalid fullname");
-    XPUSHs(sv_2mortal(newSVpv(name, version-name-1)));
-  } else if (pkg->h) {
-    XPUSHs(sv_2mortal(newSVpv(get_name(pkg->h, RPMTAG_NAME), 0)));
-  }
+  if(get_fullname_parts(pkg, &name, NULL, NULL, NULL, NULL, NULL, NULL, NULL))
+    croak("invalid fullname");
+  XPUSHs(sv_2mortal(newSVpv(name, 0)));
+  restore_chars();
 
 void
 Pkg_version(pkg)
   URPM::Package pkg
   PPCODE:
-  if (pkg->info) {
-    char *version;
-    char *release;
+  char *version;
 
-    get_fullname_parts(pkg, NULL, &version, &release, NULL, NULL);
-    if (release - version < 1) croak("invalid fullname");
-    XPUSHs(sv_2mortal(newSVpv(version, release-version-1)));
-  } else if (pkg->h) {
-    XPUSHs(sv_2mortal(newSVpv(get_name(pkg->h, RPMTAG_VERSION), 0)));
-  }
+  if(get_fullname_parts(pkg, NULL, NULL, &version, NULL, NULL, NULL, NULL, NULL))
+    croak("invalid fullname");
+  XPUSHs(sv_2mortal(newSVpv(version, 0)));
+  restore_chars();
 
 void
 Pkg_release(pkg)
   URPM::Package pkg
   PPCODE:
-  if (pkg->info) {
-    char *release;
-    char *arch;
+  char *release;
 
-    get_fullname_parts(pkg, NULL, NULL, &release, &arch, NULL);
-    if (arch - release < 1) croak("invalid fullname");
-    XPUSHs(sv_2mortal(newSVpv(release, arch-release-1)));
-  } else if (pkg->h) {
-    XPUSHs(sv_2mortal(newSVpv(get_name(pkg->h, RPMTAG_RELEASE), 0)));
-  }
+  if(get_fullname_parts(pkg, NULL, NULL, NULL, &release, NULL, NULL, NULL, NULL))
+    croak("invalid fullname");
+  XPUSHs(sv_2mortal(newSVpv(release, 0)));
+  restore_chars();
 
 void
 Pkg_arch(pkg)
   URPM::Package pkg
   PPCODE:
-  if (pkg->info) {
-    char *arch;
-    char *eos;
+  char *arch;
 
-    get_fullname_parts(pkg, NULL, NULL, NULL, &arch, &eos);
-    XPUSHs(sv_2mortal(newSVpv(arch, eos-arch)));
-  } else if (pkg->h) {
-    XPUSHs(sv_2mortal(newSVpv(headerIsEntry(pkg->h, RPMTAG_SOURCERPM) ? get_name(pkg->h, RPMTAG_ARCH) : "src", 0)));
-  }
+  get_fullname_parts(pkg, NULL, NULL, NULL, NULL, NULL, NULL, &arch, NULL);
+  XPUSHs(sv_2mortal(newSVpv(arch, 0)));
+  restore_chars();
 
 int
 Pkg_is_arch_compat__XS(pkg)
@@ -1609,14 +1667,12 @@ Pkg_is_arch_compat__XS(pkg)
   read_config_files(0);
   if (pkg->info) {
     char *arch;
-    char *eos;
 
-    get_fullname_parts(pkg, NULL, NULL, NULL, &arch, &eos);
-    *eos = 0;
+    get_fullname_parts(pkg, NULL, NULL, NULL, NULL, NULL, NULL, &arch, NULL);
     platform = rpmExpand(arch, "-%{_target_vendor}-%{_target_os}%{?_gnu}", NULL);
     RETVAL = rpmPlatformScore(platform, NULL, 0);
     _free(platform);
-    *eos = '@';
+    restore_chars();
   } else if (pkg->h && headerIsEntry(pkg->h, RPMTAG_SOURCERPM)) {
     const char *arch = get_name(pkg->h, RPMTAG_ARCH);
     platform = rpmExpand(arch, "-%{_target_vendor}-%{_target_os}%{?_gnu}", NULL);
@@ -1647,11 +1703,10 @@ Pkg_is_platform_compat(pkg)
     char *arch;
     char *eos;
 
-    get_fullname_parts(pkg, NULL, NULL, NULL, &arch, &eos);
-    *eos = 0;
+    get_fullname_parts(pkg, NULL, NULL, NULL, NULL, NULL, NULL, &arch, &eos);
     platform = rpmExpand(arch, "-%{_target_vendor}-", eos, "%{?_gnu}", NULL);
     RETVAL = rpmPlatformScore(platform, NULL, 0);
-    *eos = '@';
+    restore_chars();
     _free(platform);
   } else { 
     RETVAL = 0;
@@ -1780,57 +1835,50 @@ Pkg_fullname(pkg)
   PREINIT:
   I32 gimme = GIMME_V;
   PPCODE:
-  if (pkg->info) {
-    if (gimme == G_SCALAR) {
+  if (gimme == G_ARRAY) {
+    char *name, *version, *release, *disttag, *distepoch, *arch, *eos;
+    int items = 4;
+
+    if(get_fullname_parts(pkg, &name, NULL, &version, &release, &disttag, &distepoch, &arch, &eos))
+      croak("invalid fullname");
+
+    /* XXX: This might result in the number of items and the order which returned
+     * being unexpected in the case of disttag/disttag being present.
+     */
+    if(disttag != NULL) items++;
+    if(distepoch != NULL) items++;
+
+    EXTEND(SP, items);
+    PUSHs(sv_2mortal(newSVpv(name, 0)));
+    PUSHs(sv_2mortal(newSVpv(version, 0)));
+    PUSHs(sv_2mortal(newSVpv(release, 0)));
+    if(disttag != NULL)
+      PUSHs(sv_2mortal(newSVpv(disttag, 0)));
+    if(distepoch != NULL)
+      PUSHs(sv_2mortal(newSVpv(distepoch, 0)));
+    PUSHs(sv_2mortal(newSVpv(arch, 0)));
+    restore_chars();
+  } else if (gimme == G_SCALAR) {
+    if (pkg->info) {
       char *eos;
-      if ((eos = strchr(pkg->info, '@')) != NULL) {
+      if ((eos = strchr(pkg->info, '@')) != NULL)
 	XPUSHs(sv_2mortal(newSVpv(pkg->info, eos-pkg->info)));
-      }
-    } else if (gimme == G_ARRAY) {
-      char *name, *version, *release, *arch, *eos;
-      get_fullname_parts(pkg, &name, &version, &release, &arch, &eos);
-      if (version - name < 1 || release - version < 1 || arch - release < 1)
-	  croak("invalid fullname");
-      EXTEND(SP, 4);
-      PUSHs(sv_2mortal(newSVpv(name, version-name-1)));
-      PUSHs(sv_2mortal(newSVpv(version, release-version-1)));
-      PUSHs(sv_2mortal(newSVpv(release, arch-release-1)));
-      PUSHs(sv_2mortal(newSVpv(arch, eos-arch)));
-    }
-  } else if (pkg->h) {
-    const char *name = get_name(pkg->h, RPMTAG_NAME);
-    const char *version = get_name(pkg->h, RPMTAG_VERSION);
-    const char *release = get_name(pkg->h, RPMTAG_RELEASE);
-    const char *arch = headerIsEntry(pkg->h, RPMTAG_SOURCERPM) ? get_name(pkg->h, RPMTAG_ARCH) : "src";
-
-    if (gimme == G_SCALAR) {
+    } else if (pkg->h) {
       const char *nvra = get_nvra(pkg->h);
       XPUSHs(sv_2mortal(newSVpvf("%s", nvra)));
       _free(nvra);
-    } else if (gimme == G_ARRAY) {
-      EXTEND(SP, 4);
-      PUSHs(sv_2mortal(newSVpv(name, 0)));
-      PUSHs(sv_2mortal(newSVpv(version, 0)));
-      PUSHs(sv_2mortal(newSVpv(release, 0)));
-      PUSHs(sv_2mortal(newSVpv(arch, 0)));
     }
   }
 
 int
 Pkg_epoch(pkg)
   URPM::Package pkg
+  PREINIT:
+  int epoch;
   CODE:
-  if (pkg->info) {
-    char *s;
-
-    if ((s = strchr(pkg->info, '@')) != NULL) {
-      RETVAL = strtoul(s+1, NULL, 10);
-    } else {
-      RETVAL = 0;
-    }
-  } else if (pkg->h) {
-    RETVAL = get_int(pkg->h, RPMTAG_EPOCH);
-  } else RETVAL = 0;
+  get_fullname_parts(pkg, NULL, &epoch, NULL, NULL, NULL, NULL, NULL, NULL);
+  restore_chars();
+  RETVAL = epoch;
   OUTPUT:
   RETVAL
 
@@ -1843,63 +1891,20 @@ Pkg_compare_pkg(lpkg, rpkg)
   int lepoch;
   char *lversion;
   char *lrelease;
+  char *ldistepoch;
   char *larch;
   char *leos;
   int repoch;
   char *rversion;
   char *rrelease;
+  char *rdistepoch;
   char *rarch;
   char *reos;
   CODE:
   if (lpkg == rpkg) RETVAL = 0;
   else {
-    if (lpkg->info) {
-      char *s;
-
-      if ((s = strchr(lpkg->info, '@')) != NULL) {
-	if ((leos = strchr(s+1, '@')) != NULL) *leos = 0; /* mark end of string to enable searching backwards */
-	lepoch = atoi(s+1);
-	if (leos != NULL) *leos = '@';
-      } else {
-	lepoch = 0;
-      }
-      get_fullname_parts(lpkg, NULL, &lversion, &lrelease, &larch, &leos);
-      /* temporarily mark end of each substring */
-      lrelease[-1] = 0;
-      larch[-1] = 0;
-    } else if (lpkg->h) {
-      lepoch = get_int(lpkg->h, RPMTAG_EPOCH);
-      lversion = (char*)get_name(lpkg->h, RPMTAG_VERSION);
-      lrelease = (char*)get_name(lpkg->h, RPMTAG_RELEASE);
-      larch = headerIsEntry(lpkg->h, RPMTAG_SOURCERPM) ? (char*)get_name(lpkg->h, RPMTAG_ARCH) : "src";
-    } else croak("undefined package");
-    if (rpkg->info) {
-      char *s;
-
-      if ((s = strchr(rpkg->info, '@')) != NULL) {
-	if ((reos = strchr(s+1, '@')) != NULL) *reos = 0; /* mark end of string to enable searching backwards */
-	repoch = atoi(s+1);
-	if (reos != NULL) *reos = '@';
-      } else {
-	repoch = 0;
-      }
-      get_fullname_parts(rpkg, NULL, &rversion, &rrelease, &rarch, &reos);
-      /* temporarily mark end of each substring */
-      rrelease[-1] = 0;
-      rarch[-1] = 0;
-    } else if (rpkg->h) {
-      repoch = get_int(rpkg->h, RPMTAG_EPOCH);
-      rversion = (char*)get_name(rpkg->h, RPMTAG_VERSION);
-      rrelease = (char*)get_name(rpkg->h, RPMTAG_RELEASE);
-      rarch = headerIsEntry(rpkg->h, RPMTAG_SOURCERPM) ? (char*)get_name(rpkg->h, RPMTAG_ARCH) : "src";
-    } else {
-      /* restore info string modified */
-      if (lpkg->info) {
-	lrelease[-1] = '-';
-	larch[-1] = '.';
-      }
+    if(get_fullname_parts(lpkg, NULL, &lepoch, &lversion, &lrelease, &ldistepoch, NULL, &larch, &leos) || get_fullname_parts(rpkg, NULL, &repoch, &rversion, &rrelease, &rdistepoch, NULL, &rarch, &reos))
       croak("undefined package");
-    }
     compare = lepoch - repoch;
     if (!compare) {
       compare = rpmvercmp(lversion, rversion);
@@ -1945,15 +1950,7 @@ Pkg_compare_pkg(lpkg, rpkg)
 	}
       }
     }
-    /* restore info string modified */
-    if (lpkg->info) {
-      lrelease[-1] = '-';
-      larch[-1] = '.';
-    }
-    if (rpkg->info) {
-      rrelease[-1] = '-';
-      rarch[-1] = '.';
-    }
+    restore_chars();
     RETVAL = compare;
   }
   OUTPUT:
@@ -1968,25 +1965,11 @@ Pkg_compare(pkg, evr)
   int _epoch;
   char *_version;
   char *_release;
+  char *_distepoch;
   char *_eos;
   CODE:
-  if (pkg->info) {
-    char *s;
-
-    if ((s = strchr(pkg->info, '@')) != NULL) {
-      if ((_eos = strchr(s+1, '@')) != NULL) *_eos = 0; /* mark end of string to enable searching backwards */
-      _epoch = atoi(s+1);
-      if (_eos != NULL) *_eos = '@';
-    } else {
-      _epoch = 0;
-    }
-    get_fullname_parts(pkg, NULL, &_version, &_release, &_eos, NULL);
-    /* temporarily mark end of each substring */
-    _release[-1] = 0;
-    _eos[-1] = 0;
-  } else if (pkg->h) {
-    _epoch = get_int(pkg->h, RPMTAG_EPOCH);
-  } else croak("undefined package");
+  if(get_fullname_parts(pkg, NULL, &_epoch, &_version, &_release, &_distepoch, NULL, NULL, &_eos))
+    croak("undefined package");
   if (!compare) {
     char *epoch, *version, *release;
 
@@ -1998,36 +1981,27 @@ Pkg_compare(pkg, evr)
       *version++ = 0;
       if (!*epoch) epoch = "0";
       compare = _epoch - (*epoch ? atoi(epoch) : 0);
-      version[-1] = ':'; /* restore in memory modification */
     } else {
       /* there is no epoch defined, so assume epoch = 0 */
       version = evr;
       compare = _epoch;
     }
     if (!compare) {
-      if (!pkg->info)
-	_version = (char*)get_name(pkg->h, RPMTAG_VERSION);
       /* continue extracting release if any */
       if ((release = strrchr(version, '-')) != NULL) {
 	*release++ = 0;
 	compare = rpmvercmp(_version, version);
 	if (!compare) {
 	  /* need to compare with release here */
-	  if (!pkg->info)
-	    _release = (char*)get_name(pkg->h, RPMTAG_RELEASE);
 	  compare = rpmvercmp(_release, release);
 	}
-	release[-1] = '-'; /* restore in memory modification */
       } else {
 	compare = rpmvercmp(_version, version);
       }
     }
   }
   /* restore info string modified */
-  if (pkg->info) {
-    _release[-1] = '-';
-    _eos[-1] = '.';
-  }
+  restore_chars();
   RETVAL = compare;
   OUTPUT:
   RETVAL
-- 
cgit v1.2.1