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save memory in ipkg while parsing package lists - there's no need to load the whole files into ram before parsing them

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10125 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2008-01-06 02:48:24 +00:00
parent e2b0e04017
commit 8f46721f9b
1 changed files with 249 additions and 0 deletions
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249
package/busybox/patches/524-memory_usage.patch Normal file
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@ -0,0 +1,249 @@
Index: busybox-1.8.2/archival/libipkg/pkg.c
===================================================================
--- busybox-1.8.2.orig/archival/libipkg/pkg.c 2008-01-06 03:14:12.003658206 +0100
+++ busybox-1.8.2/archival/libipkg/pkg.c 2008-01-06 03:24:18.187737063 +0100
@@ -224,8 +224,7 @@
if (err) { return err; }
rewind(control_file);
- raw = read_raw_pkgs_from_stream(control_file);
- pkg_parse_raw(pkg, &raw, NULL, NULL);
+ pkg_parse_stream(pkg, control_file, NULL, NULL);
fclose(control_file);
Index: busybox-1.8.2/archival/libipkg/pkg_hash.c
===================================================================
--- busybox-1.8.2.orig/archival/libipkg/pkg_hash.c 2008-01-06 03:14:12.231671203 +0100
+++ busybox-1.8.2/archival/libipkg/pkg_hash.c 2008-01-06 03:28:38.218555373 +0100
@@ -89,20 +89,20 @@
pkg_src_t *src, pkg_dest_t *dest, int is_status_file)
{
hash_table_t *hash = &conf->pkg_hash;
- char **raw;
- char **raw_start;
+ FILE *fp;
pkg_t *pkg;
- raw = raw_start = read_raw_pkgs_from_file(file_name);
- if (!raw)
- return -ENOMEM;
+ if(!(fp = fopen(file_name, "r"))){
+ fprintf(stderr, "can't get %s open for read\n", file_name);
+ return NULL;
+ }
- while(*raw){ /* don't worry, we'll increment raw in the parsing function */
+ while(!feof(fp)) { /* don't worry, we'll increment raw in the parsing function */
pkg = pkg_new();
if (!pkg)
return -ENOMEM;
- if (pkg_parse_raw(pkg, &raw, src, dest) == 0) {
+ if (pkg_parse_stream(pkg, fp, src, dest) == 0) {
if (!pkg->architecture) {
char *version_str = pkg_version_str_alloc(pkg);
pkg->architecture = pkg_get_default_arch(conf);
@@ -116,13 +116,6 @@
}
}
- /* XXX: CLEANUP: I'd like a cleaner interface for cleaning up
- memory after read_raw_pkgs_from_file */
- raw = raw_start;
- while (*raw) {
- free(*raw++);
- }
- free(raw_start);
return 0;
}
Index: busybox-1.8.2/archival/libipkg/pkg_parse.c
===================================================================
--- busybox-1.8.2.orig/archival/libipkg/pkg_parse.c 2008-01-06 03:14:12.283674167 +0100
+++ busybox-1.8.2/archival/libipkg/pkg_parse.c 2008-01-06 03:38:24.111943535 +0100
@@ -227,6 +227,161 @@
Enhances, perhaps we could generalize all of these and save some
code duplication.
*/
+int pkg_parse_stream(pkg_t *pkg, FILE *stream, pkg_src_t *src, pkg_dest_t *dest)
+{
+ int reading_conffiles, reading_description;
+ int pkg_false_provides=1;
+ char ** lines;
+ char *provide=NULL;
+ char *buf, *scout;
+ int count = 0;
+ size_t size = 512;
+
+ buf = malloc (size);
+
+ pkg->src = src;
+ pkg->dest = dest;
+
+ reading_conffiles = reading_description = 0;
+
+ while (fgets(buf, size, stream)) {
+ while (strlen (buf) == (size - 1)
+ && buf[size-2] != '\n') {
+ size_t o = size - 1;
+ size *= 2;
+ buf = realloc (buf, size);
+ if (fgets (buf + o, size - o, stream) == NULL)
+ break;
+ }
+
+ if((scout = strchr(buf, '\n')))
+ *scout = '\0';
+
+ lines = &buf;
+ /* fprintf(stderr, "PARSING %s\n", *lines);*/
+ if(isGenericFieldType("Package:", *lines))
+ pkg->name = parseGenericFieldType("Package", *lines);
+ else if(isGenericFieldType("Architecture:", *lines))
+ pkg->architecture = parseGenericFieldType("Architecture", *lines);
+ else if(isGenericFieldType("Filename:", *lines))
+ pkg->filename = parseGenericFieldType("Filename", *lines);
+ else if(isGenericFieldType("Section:", *lines))
+ pkg->section = parseGenericFieldType("Section", *lines);
+ else if(isGenericFieldType("MD5sum:", *lines))
+ pkg->md5sum = parseGenericFieldType("MD5sum", *lines);
+ /* The old ipkg wrote out status files with the wrong case for MD5sum,
+ let's parse it either way */
+ else if(isGenericFieldType("MD5Sum:", *lines))
+ pkg->md5sum = parseGenericFieldType("MD5Sum", *lines);
+ else if(isGenericFieldType("Size:", *lines))
+ pkg->size = parseGenericFieldType("Size", *lines);
+ else if(isGenericFieldType("Source:", *lines))
+ pkg->source = parseGenericFieldType("Source", *lines);
+ else if(isGenericFieldType("Installed-Size:", *lines))
+ pkg->installed_size = parseGenericFieldType("Installed-Size", *lines);
+ else if(isGenericFieldType("Installed-Time:", *lines)) {
+ char *time_str = parseGenericFieldType("Installed-Time", *lines);
+ pkg->installed_time = strtoul(time_str, NULL, 0);
+ } else if(isGenericFieldType("Priority:", *lines))
+ pkg->priority = parseGenericFieldType("Priority", *lines);
+ else if(isGenericFieldType("Essential:", *lines)) {
+ char *essential_value;
+ essential_value = parseGenericFieldType("Essential", *lines);
+ if (strcmp(essential_value, "yes") == 0) {
+ pkg->essential = 1;
+ }
+ free(essential_value);
+ }
+ else if(isGenericFieldType("Status", *lines))
+ parseStatus(pkg, *lines);
+ else if(isGenericFieldType("Version", *lines))
+ parseVersion(pkg, *lines);
+ else if(isGenericFieldType("Maintainer", *lines))
+ pkg->maintainer = parseGenericFieldType("Maintainer", *lines);
+ else if(isGenericFieldType("Conffiles", *lines)){
+ parseConffiles(pkg, *lines);
+ reading_conffiles = 1;
+ }
+ else if(isGenericFieldType("Description", *lines)) {
+ pkg->description = parseGenericFieldType("Description", *lines);
+ reading_conffiles = 0;
+ reading_description = 1;
+ }
+
+ else if(isGenericFieldType("Provides", *lines)){
+/* Here we add the internal_use to align the off by one problem between provides_str and provides */
+ provide = (char * ) malloc(strlen(*lines)+ 35 ); /* Preparing the space for the new ipkg_internal_use_only */
+ if ( alterProvidesLine(*lines,provide) ){
+ return EINVAL;
+ }
+ pkg->provides_str = parseDependsString( provide, &pkg->provides_count);
+/* Let's try to hack a bit here.
+ The idea is that if a package has no Provides, we would add one generic, to permit the check of dependencies
+ in alot of other places. We will remove it before writing down the status database */
+ pkg_false_provides=0;
+ free(provide);
+ }
+
+ else if(isGenericFieldType("Depends", *lines))
+ pkg->depends_str = parseDependsString(*lines, &pkg->depends_count);
+ else if(isGenericFieldType("Pre-Depends", *lines))
+ pkg->pre_depends_str = parseDependsString(*lines, &pkg->pre_depends_count);
+ else if(isGenericFieldType("Recommends", *lines))
+ pkg->recommends_str = parseDependsString(*lines, &pkg->recommends_count);
+ else if(isGenericFieldType("Suggests", *lines))
+ pkg->suggests_str = parseDependsString(*lines, &pkg->suggests_count);
+ /* Abhaya: support for conflicts */
+ else if(isGenericFieldType("Conflicts", *lines))
+ pkg->conflicts_str = parseDependsString(*lines, &pkg->conflicts_count);
+ else if(isGenericFieldType("Replaces", *lines))
+ pkg->replaces_str = parseDependsString(*lines, &pkg->replaces_count);
+ else if(line_is_blank(*lines)) {
+ break;
+ }
+ else if(**lines == ' '){
+ if(reading_description) {
+ /* we already know it's not blank, so the rest of description */
+ pkg->description = realloc(pkg->description,
+ strlen(pkg->description)
+ + 1 + strlen(*lines) + 1);
+ strcat(pkg->description, "\n");
+ strcat(pkg->description, (*lines));
+ }
+ else if(reading_conffiles)
+ parseConffiles(pkg, *lines);
+ }
+ }
+/* If the ipk has not a Provides line, we insert our false line */
+ if ( pkg_false_provides==1)
+ pkg->provides_str = parseDependsString ((char *)"Provides: ipkg_internal_use_only ", &pkg->provides_count);
+
+ free(buf);
+ if (pkg->name) {
+ return 0;
+ } else {
+ return EINVAL;
+ }
+}
+
+#if 0
+
+/* Some random thoughts from Carl:
+
+ This function could be considerably simplified if we just kept
+ an array of all the generic string-valued field names, and looped
+ through those looking for a match. Also, these fields could perhaps
+ be stored in the package as an array as well, (or, probably better,
+ as an nv_pair_list_t).
+
+ Fields which require special parsing or storage, (such as Depends:
+ and Status:) could be handled as they are now.
+*/
+/* XXX: FEATURE: The Suggests: field needs to be changed from a string
+ to a dependency list. And, since we already have
+ Depends/Pre-Depends and need to add Conflicts, Recommends, and
+ Enhances, perhaps we could generalize all of these and save some
+ code duplication.
+*/
int pkg_parse_raw(pkg_t *pkg, char ***raw, pkg_src_t *src, pkg_dest_t *dest)
{
int reading_conffiles, reading_description;
@@ -345,6 +500,7 @@
return EINVAL;
}
}
+#endif
int pkg_valorize_other_field(pkg_t *pkg, char ***raw)
{
Index: busybox-1.8.2/archival/libipkg/pkg_parse.h
===================================================================
--- busybox-1.8.2.orig/archival/libipkg/pkg_parse.h 2008-01-06 03:14:12.303675307 +0100
+++ busybox-1.8.2/archival/libipkg/pkg_parse.h 2008-01-06 03:39:03.954214018 +0100
@@ -25,7 +25,10 @@
char ** parseDependsString(char * raw, int * depends_count);
int parseVersion(pkg_t *pkg, char *raw);
void parseConffiles(pkg_t * pkg, char * raw);
+#if 0
int pkg_parse_raw(pkg_t *pkg, char ***raw, pkg_src_t *src, pkg_dest_t *dest);
+#endif
+int pkg_parse_stream(pkg_t *pkg, FILE *stream, pkg_src_t *src, pkg_dest_t *dest);
int pkg_valorize_other_field(pkg_t *pkg, char ***raw);
#endif