| 5 |
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* Sorting routines for meta-files |
| 6 |
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*/ |
| 7 |
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| 8 |
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#include "paths.h" |
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#include "meta.h" |
| 10 |
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| 11 |
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#ifdef _WIN32 |
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+ |
#include <process.h> /* getpid() */ |
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+ |
#endif |
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+ |
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+ |
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| 16 |
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#define PBSIZE 1000 /* max size of sort block */ |
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/* maxalloc must be >= this */ |
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| 12 |
– |
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| 19 |
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#define NFILES 4 /* number of sort files */ |
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static void treemerge(int height, int nt, int nf, PLIST *pl, |
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int (*pcmp)(), FILE *ofp); |
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static void sendsort( PLIST *pl, int (*pcmp)()); |
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static void order(PRIMITIVE *pa[], int n, PLIST *pl); |
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static char * tfname( int lvl, int num); |
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| 17 |
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#include "meta.h" |
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– |
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– |
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| 20 |
– |
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| 21 |
– |
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| 22 |
– |
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| 23 |
– |
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| 24 |
– |
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| 28 |
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/* |
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* This sort routine does a combination quicksort and |
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* n-ary mergesort |
| 31 |
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*/ |
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| 33 |
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| 34 |
< |
sort(infp, pcmp) /* sort primitives according to pcmp */ |
| 35 |
< |
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| 36 |
< |
FILE *infp; |
| 37 |
< |
int (*pcmp)(); /* compares pointers to pointers to primitives! */ |
| 38 |
< |
|
| 34 |
> |
void |
| 35 |
> |
sort( /* sort primitives according to pcmp */ |
| 36 |
> |
FILE *infp, |
| 37 |
> |
int (*pcmp)() /* compares pointers to pointers to primitives! */ |
| 38 |
> |
) |
| 39 |
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{ |
| 40 |
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PRIMITIVE *prims[PBSIZE]; /* pointers to primitives */ |
| 41 |
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PLIST primlist; /* our primitives list */ |
| 82 |
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* 0 or 1 global commands. |
| 83 |
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*/ |
| 84 |
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| 85 |
< |
mergesort(fi, nf, pl, pcmp, ofp) /* merge sorted files with list */ |
| 85 |
> |
void |
| 86 |
> |
pmergesort( /* merge sorted files with list */ |
| 87 |
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|
| 88 |
< |
FILE *fi[]; /* array of input files */ |
| 89 |
< |
int nf; /* number of input files */ |
| 90 |
< |
PLIST *pl; /* sorted list */ |
| 91 |
< |
int (*pcmp)(); /* comparison function, takes primitive handles */ |
| 92 |
< |
FILE *ofp; /* output file */ |
| 93 |
< |
|
| 88 |
> |
FILE *fi[], /* array of input files */ |
| 89 |
> |
int nf, /* number of input files */ |
| 90 |
> |
PLIST *pl, /* sorted list */ |
| 91 |
> |
int (*pcmp)(), /* comparison function, takes primitive handles */ |
| 92 |
> |
FILE *ofp /* output file */ |
| 93 |
> |
) |
| 94 |
|
{ |
| 95 |
|
PRIMITIVE *plp; /* position in list */ |
| 96 |
|
PRIMITIVE *pp[NFILES]; /* input primitives */ |
| 105 |
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|
| 106 |
|
for (i = 0; i < nf; i++) { /* initialize input files */ |
| 107 |
|
if ((pp[i] = palloc()) == NULL) |
| 108 |
< |
error(SYSTEM, "memory exhausted in mergesort"); |
| 108 |
> |
error(SYSTEM, "memory exhausted in pmergesort"); |
| 109 |
|
readp(pp[i], fi[i]); |
| 110 |
|
} |
| 111 |
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| 147 |
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| 148 |
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| 149 |
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|
| 150 |
< |
static |
| 151 |
< |
treemerge(height, nt, nf, pl, pcmp, ofp) /* merge into one file */ |
| 150 |
> |
static void |
| 151 |
> |
treemerge( /* merge into one file */ |
| 152 |
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|
| 153 |
< |
int height, nt, nf; |
| 154 |
< |
PLIST *pl; |
| 155 |
< |
int (*pcmp)(); |
| 156 |
< |
FILE *ofp; |
| 157 |
< |
|
| 153 |
> |
int height, int nt, int nf, |
| 154 |
> |
PLIST *pl, |
| 155 |
> |
int (*pcmp)(), |
| 156 |
> |
FILE *ofp |
| 157 |
> |
) |
| 158 |
|
{ |
| 155 |
– |
char *tfname(); |
| 159 |
|
FILE *fi[NFILES], *fp; |
| 160 |
|
int i; |
| 161 |
|
|
| 167 |
|
if ((fp = ofp) == NULL) |
| 168 |
|
fp = efopen(tfname(height + 1, nt), "w"); |
| 169 |
|
|
| 170 |
< |
mergesort(fi, nf, pl, pcmp, fp); |
| 170 |
> |
pmergesort(fi, nf, pl, pcmp, fp); |
| 171 |
|
|
| 172 |
|
for (i = 0; i < nf; i++) { |
| 173 |
|
fclose(fi[i]); |
| 194 |
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|
| 195 |
|
|
| 196 |
|
|
| 197 |
< |
static |
| 198 |
< |
sendsort(pl, pcmp) /* send a sorted list */ |
| 197 |
> |
static void |
| 198 |
> |
sendsort( /* send a sorted list */ |
| 199 |
|
|
| 200 |
< |
PLIST *pl; |
| 201 |
< |
int (*pcmp)(); |
| 202 |
< |
|
| 200 |
> |
PLIST *pl, |
| 201 |
> |
int (*pcmp)() |
| 202 |
> |
) |
| 203 |
|
{ |
| 204 |
|
static int nf = 0, |
| 205 |
|
intree = FALSE; |
| 250 |
|
|
| 251 |
|
|
| 252 |
|
|
| 253 |
+ |
static void |
| 254 |
+ |
order( /* order the first n array primitives into list */ |
| 255 |
|
|
| 256 |
< |
static |
| 257 |
< |
order(pa, n, pl) /* order the first n array primitives into list */ |
| 258 |
< |
|
| 259 |
< |
PRIMITIVE *pa[]; |
| 255 |
< |
int n; |
| 256 |
< |
PLIST *pl; |
| 257 |
< |
|
| 256 |
> |
PRIMITIVE *pa[], |
| 257 |
> |
int n, |
| 258 |
> |
PLIST *pl |
| 259 |
> |
) |
| 260 |
|
{ |
| 261 |
|
register int i; |
| 262 |
|
|
| 273 |
|
|
| 274 |
|
|
| 275 |
|
static char * |
| 276 |
< |
tfname(lvl, num) /* create temporary file name */ |
| 276 |
> |
tfname( /* create temporary file name */ |
| 277 |
|
|
| 278 |
< |
int lvl, num; |
| 279 |
< |
|
| 278 |
> |
int lvl, int num |
| 279 |
> |
) |
| 280 |
|
{ |
| 281 |
< |
static char fnbuf[32]; |
| 281 |
> |
static char pathbuf[PATH_MAX]; |
| 282 |
> |
static char fnbuf[PATH_MAX]; |
| 283 |
> |
static size_t psiz; |
| 284 |
|
|
| 285 |
< |
sprintf(fnbuf, "%sS%d%c%d", TDIR, getpid(), lvl+'A', num); |
| 285 |
> |
if (pathbuf[0] == '\0') { /* first time */ |
| 286 |
> |
temp_directory(pathbuf, sizeof(pathbuf)); |
| 287 |
> |
psiz = strlen(pathbuf); |
| 288 |
> |
} |
| 289 |
> |
snprintf(fnbuf, sizeof(pathbuf)-psiz, |
| 290 |
> |
"%s/S%d%c%d", pathbuf, getpid(), lvl+'A', num); |
| 291 |
> |
/*sprintf(fnbuf, "%sS%d%c%d", TDIR, getpid(), lvl+'A', num);*/ |
| 292 |
|
|
| 293 |
|
return(fnbuf); |
| 294 |
|
} |
