X-Git-Url: http://sru.miketaylor.org.uk/?a=blobdiff_plain;f=isam%2Fisam.c;h=057ffa8a7fbda0484723b9a9d7d33efda2989336;hb=fa9ed9d37eadc2092f773ccff49c5b6c8b879a9a;hp=c84e42e3db39f65cf3ff85de233b2edadd157a41;hpb=0e643dd5ce707178394c0e9d82ec2eeb80f330ec;p=idzebra-moved-to-github.git diff --git a/isam/isam.c b/isam/isam.c index c84e42e..057ffa8 100644 --- a/isam/isam.c +++ b/isam/isam.c @@ -4,7 +4,28 @@ * Sebastian Hammer, Adam Dickmeiss * * $Log: isam.c,v $ - * Revision 1.7 1994-09-28 11:56:25 quinn + * Revision 1.14 1995-11-24 17:26:19 quinn + * Mostly about making some ISAM stuff in the config file optional. + * + * Revision 1.13 1995/10/17 18:03:15 adam + * Commented out qsort in is_merge. + * + * Revision 1.12 1995/09/06 16:11:41 adam + * Keysize parameter to is_open (if non-zero). + * + * Revision 1.11 1995/09/04 12:33:46 adam + * Various cleanup. YAZ util used instead. + * + * Revision 1.10 1994/09/28 16:58:32 quinn + * Small mod. + * + * Revision 1.9 1994/09/28 12:56:15 quinn + * Added access functions (ISPT) + * + * Revision 1.8 1994/09/28 12:32:17 quinn + * Trivial + * + * Revision 1.7 1994/09/28 11:56:25 quinn * Added sort of input to is_merge * * Revision 1.6 1994/09/28 11:29:33 quinn @@ -24,11 +45,12 @@ * */ +#include #include #include #include -#include +#include #include #include #include @@ -37,6 +59,27 @@ #include "keyops.h" static int (*extcmp)(const void *p1, const void *p2); +static ispt_struct *ispt_freelist = 0; + +static ISPT ispt_alloc() +{ + ISPT p; + + if (ispt_freelist) + { + p = ispt_freelist; + ispt_freelist = ispt_freelist->next; + } + else + p = xmalloc(sizeof(ispt_struct)); + return p; +} + +static void ispt_free(ISPT pt) +{ + pt->next = ispt_freelist; + ispt_freelist = pt; +} static int splitargs(const char *s, char *bf[], int max) { @@ -51,7 +94,7 @@ static int splitargs(const char *s, char *bf[], int max) ct++; if (ct > max) { - log(LOG_WARN, "Ignoring extra args to is resource"); + logf (LOG_WARN, "Ignoring extra args to is resource"); bf[ct] = '\0'; return(ct - 1); } @@ -65,24 +108,25 @@ static int splitargs(const char *s, char *bf[], int max) * Process resources. */ ISAM is_open(const char *name, int (*cmp)(const void *p1, const void *p2), - int writeflag) + int writeflag, int keysize) { ISAM new; char *nm, *r, *pp[IS_MAX_BLOCKTYPES+1], m[2]; int num, size, rs, tmp, i; is_type_header th; - log(LOG_DEBUG, "is_open(%s, %s)", name, writeflag ? "RW" : "RDONLY"); + logf (LOG_DEBUG, "is_open(%s, %s)", name, writeflag ? "RW" : "RDONLY"); new = xmalloc(sizeof(*new)); new->writeflag = writeflag; for (i = 0; i < IS_MAX_BLOCKTYPES; i++) new->types[i].index = 0; /* dummy */ /* determine number and size of blocktypes */ - if (!(r = res_get(common_resource, nm = strconcat(name, ".", - "blocktypes", 0))) || !(num = splitargs(r, pp, IS_MAX_BLOCKTYPES))) + if (!(r = res_get_def(common_resource, nm = strconcat(name, ".", + "blocktypes", 0), "64 1K")) || + !(num = splitargs(r, pp, IS_MAX_BLOCKTYPES))) { - log(LOG_FATAL, "Failed to locate resource %s", nm); + logf (LOG_FATAL, "Failed to locate resource %s", nm); return 0; } new->num_types = num; @@ -90,7 +134,7 @@ ISAM is_open(const char *name, int (*cmp)(const void *p1, const void *p2), { if ((rs = sscanf(pp[i], "%d%1[bBkKmM]", &size, m)) < 1) { - log(LOG_FATAL, "Error in resource %s: %s", r, pp[i]); + logf (LOG_FATAL, "Error in resource %s: %s", r, pp[i]); return 0; } if (rs == 1) @@ -104,7 +148,7 @@ ISAM is_open(const char *name, int (*cmp)(const void *p1, const void *p2), case 'm': case 'M': new->types[i].blocksize = size * 1048576; break; default: - log(LOG_FATAL, "Illegal size suffix: %c", *m); + logf (LOG_FATAL, "Illegal size suffix: %c", *m); return 0; } new->types[i].dbuf = xmalloc(new->types[i].blocksize); @@ -113,14 +157,14 @@ ISAM is_open(const char *name, int (*cmp)(const void *p1, const void *p2), if (!(new->types[i].bf = bf_open(strconcat(name, m, 0), new->types[i].blocksize, writeflag))) { - log(LOG_FATAL, "bf_open failed"); + logf (LOG_FATAL, "bf_open failed"); return 0; } if ((rs = is_rb_read(&new->types[i], &th)) > 0) { if (th.blocksize != new->types[i].blocksize) { - log(LOG_FATAL, "File blocksize mismatch in %s", name); + logf (LOG_FATAL, "File blocksize mismatch in %s", name); exit(1); } new->types[i].freelist = th.freelist; @@ -130,7 +174,7 @@ ISAM is_open(const char *name, int (*cmp)(const void *p1, const void *p2), { if ((rs = is_rb_write(&new->types[i], &th)) <=0) /* dummy */ { - log(LOG_FATAL, "Failed to write initial superblock."); + logf (LOG_FATAL, "Failed to write initial superblock."); exit(1); } new->types[i].freelist = -1; @@ -138,44 +182,50 @@ ISAM is_open(const char *name, int (*cmp)(const void *p1, const void *p2), } /* ELSE: this is an empty file opened in read-only mode. */ } - if (!(r = res_get_def(common_resource, nm = strconcat(name, ".", "keysize", - 0), "4"))) - { - log(LOG_FATAL, "Failed to locate resource %s", nm); - return 0; - } - if ((new->keysize = atoi(r)) <= 0) + if (keysize > 0) + new->keysize = keysize; + else { - log(LOG_FATAL, "Must specify positive keysize."); - return 0; + if (!(r = res_get_def(common_resource, nm = strconcat(name, ".", + "keysize", + 0), "4"))) + { + logf (LOG_FATAL, "Failed to locate resource %s", nm); + return 0; + } + if ((new->keysize = atoi(r)) <= 0) + { + logf (LOG_FATAL, "Must specify positive keysize."); + return 0; + } } /* determine repack percent */ if (!(r = res_get_def(common_resource, nm = strconcat(name, ".", "repack", 0), IS_DEF_REPACK_PERCENT))) { - log(LOG_FATAL, "Failed to locate resource %s", nm); + logf (LOG_FATAL, "Failed to locate resource %s", nm); return 0; } new->repack = atoi(r); /* determine max keys/blocksize */ - if (!(r = res_get(common_resource, nm = strconcat(name, ".", - "maxkeys", 0))) || !(num = splitargs(r, pp, IS_MAX_BLOCKTYPES))) + if (!(r = res_get_def(common_resource, nm = strconcat(name, ".", + "maxkeys", 0), "50")) || !(num = splitargs(r, pp, IS_MAX_BLOCKTYPES))) { - log(LOG_FATAL, "Failed to locate resource %s", nm); + logf (LOG_FATAL, "Failed to locate resource %s", nm); return 0; } if (num < new->num_types -1) { - log(LOG_FATAL, "Not enough elements in %s", nm); + logf (LOG_FATAL, "Not enough elements in %s", nm); return 0; } for (i = 0; i < num; i++) { if ((rs = sscanf(pp[i], "%d", &tmp)) < 1) { - log(LOG_FATAL, "Error in resource %s: %s", r, pp[i]); + logf (LOG_FATAL, "Error in resource %s: %s", r, pp[i]); return 0; } new->types[i].max_keys = tmp; @@ -196,28 +246,29 @@ ISAM is_open(const char *name, int (*cmp)(const void *p1, const void *p2), new->keysize; if (new->types[i].max_keys_block0 < 1) { - log(LOG_FATAL, "Blocksize too small in %s", name); + logf (LOG_FATAL, "Blocksize too small in %s", name); exit(1); } } /* determine nice fill rates */ - if (!(r = res_get(common_resource, nm = strconcat(name, ".", - "nicefill", 0))) || !(num = splitargs(r, pp, IS_MAX_BLOCKTYPES))) + if (!(r = res_get_def(common_resource, nm = strconcat(name, ".", + "nicefill", 0), "90 90")) || !(num = splitargs(r, pp, + IS_MAX_BLOCKTYPES))) { - log(LOG_FATAL, "Failed to locate resource %s", nm); + logf (LOG_FATAL, "Failed to locate resource %s", nm); return 0; } if (num < new->num_types) { - log(LOG_FATAL, "Not enough elements in %s", nm); + logf (LOG_FATAL, "Not enough elements in %s", nm); return 0; } for (i = 0; i < num; i++) { if ((rs = sscanf(pp[i], "%d", &tmp)) < 1) { - log(LOG_FATAL, "Error in resource %s: %s", r, pp[i]); + logf (LOG_FATAL, "Error in resource %s: %s", r, pp[i]); return 0; } new->types[i].nice_keys_block = (new->types[i].max_keys_block0 * tmp) / @@ -238,7 +289,7 @@ int is_close(ISAM is) int i; is_type_header th; - log(LOG_DEBUG, "is_close()"); + logf (LOG_DEBUG, "is_close()"); for (i = 0; i < is->num_types; i++) { if (is->types[i].bf) @@ -251,7 +302,7 @@ int is_close(ISAM is) th.top = is->types[i].top; if (is_rb_write(&is->types[i], &th) < 0) { - log(LOG_FATAL, "Failed to write headerblock"); + logf (LOG_FATAL, "Failed to write headerblock"); exit(1); } } @@ -289,13 +340,14 @@ ISAM_P is_merge(ISAM is, ISAM_P pos, int num, char *data) char operation, *record; extcmp = is->cmp; +#if 0 qsort(data, num, is_keysize(is) + 1, sort_input); +#endif is_m_establish_tab(is, &tab, pos); - /* TODO: do something to aquire oldnum at this point */ if (pos) if (is_m_read_full(&tab, tab.data) < 0) { - log(LOG_FATAL, "read_full failed"); + logf (LOG_FATAL, "read_full failed"); exit(1); } oldnum = tab.num_records; @@ -315,17 +367,17 @@ ISAM_P is_merge(ISAM is, ISAM_P pos, int num, char *data) { if (operation == KEYOP_INSERT) { - log(LOG_DEBUG, "XXInserting new record."); + logf (LOG_DEBUG, "XXInserting new record."); is_m_write_record(&tab, record); } else - log(LOG_DEBUG, "XXDeletion failed to find match."); + logf (LOG_DEBUG, "XXDeletion failed to find match."); } else /* match found */ { if (operation == KEYOP_INSERT) { - log(LOG_DEBUG, "XXSkipping insertion - match found."); + logf (LOG_DEBUG, "XXSkipping insertion - match found."); continue; } else if (operation == KEYOP_DELETE) @@ -336,7 +388,7 @@ ISAM_P is_merge(ISAM is, ISAM_P pos, int num, char *data) /* next key is identical insert? - NOOP - skip it */ if (!memcmp(record, data + 1, is_keysize(is))) { - log(LOG_DEBUG, "XXNoop delete. skipping."); + logf (LOG_DEBUG, "XXNoop delete. skipping."); data += 1 + is_keysize(is); num--; continue; @@ -346,14 +398,14 @@ ISAM_P is_merge(ISAM is, ISAM_P pos, int num, char *data) res = (*is->cmp)(data + 1, keybuf); if (res < 0) { - log(LOG_DEBUG, "XXReplacing record."); + logf (LOG_DEBUG, "XXReplacing record."); is_m_replace_record(&tab, data + 1); data += 1 + is_keysize(is); num--; continue; } } - log(LOG_DEBUG, "Deleting record."); + logf (LOG_DEBUG, "Deleting record."); is_m_delete_record(&tab); } } @@ -387,9 +439,38 @@ ISAM_P is_merge(ISAM is, ISAM_P pos, int num, char *data) * Locate a table of keys in an isam file. The ISPT is an individual * position marker for that table. */ -ISPT is_position(ISAM is, ISAM_P pos); +ISPT is_position(ISAM is, ISAM_P pos) +{ + ispt_struct *p; + + p = ispt_alloc(); + is_m_establish_tab(is, &p->tab, pos); + return p; +} /* * Release ISPT. */ -void is_pt_free(ISPT ip); +void is_pt_free(ISPT ip) +{ + is_m_release_tab(&ip->tab); + ispt_free(ip); +} + +/* + * Read a key from a table. + */ +int is_readkey(ISPT ip, void *buf) +{ + return is_m_read_record(&ip->tab, buf); +} + +int is_numkeys(ISPT ip) +{ + return is_m_num_records(&ip->tab); +} + +void is_rewind(ISPT ip) +{ + is_m_rewind(&ip->tab); +}