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Commit888271e

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Fix snprintf to handle %$ properly by storing and reordering the
arguments.Nicolai Tufar
1 parent83e87e6 commit888271e

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1 file changed

+103
-97
lines changed

1 file changed

+103
-97
lines changed

‎src/port/snprintf.c‎

Lines changed: 103 additions & 97 deletions
Original file line numberDiff line numberDiff line change
@@ -65,7 +65,7 @@
6565
* causing nasty effects.
6666
**************************************************************/
6767

68-
/*static char _id[] = "$PostgreSQL: pgsql/src/port/snprintf.c,v 1.19 2005/03/12 04:00:56 momjian Exp $";*/
68+
/*static char _id[] = "$PostgreSQL: pgsql/src/port/snprintf.c,v 1.20 2005/03/16 06:00:58 momjian Exp $";*/
6969

7070
intpg_snprintf(char*str,size_tcount,constchar*fmt,...);
7171
intpg_vsnprintf(char*str,size_tcount,constchar*fmt,va_listargs);
@@ -151,20 +151,20 @@ static void dopr_outch(int c, char *end, char **output);
151151

152152
#defineFMTSTR1
153153
#defineFMTNUM2
154-
#defineFMTFLOAT3
155-
#defineFMTCHAR4
154+
#defineFMTNUM_U3
155+
#defineFMTFLOAT4
156+
#defineFMTCHAR5
157+
#defineFMTWIDTH6
158+
#defineFMTLEN7
156159

157160
staticvoid
158161
dopr(char*buffer,constchar*format,va_listargs,char*end)
159162
{
160163
intch;
161-
int64value;
162-
doublefvalue;
163164
intlonglongflag=0;
164165
intlongflag=0;
165166
intpointflag=0;
166167
intmaxwidth=0;
167-
char*strvalue;
168168
intljust;
169169
intlen;
170170
intzpad;
@@ -173,6 +173,7 @@ dopr(char *buffer, const char *format, va_list args, char *end)
173173
constchar*fmtbegin;
174174
intfmtpos=1;
175175
intrealpos=0;
176+
intprecision;
176177
intposition;
177178
char*output;
178179
intpercents=1;
@@ -195,6 +196,8 @@ dopr(char *buffer, const char *format, va_list args, char *end)
195196
intpointflag;
196197
charfunc;
197198
intrealpos;
199+
intlongflag;
200+
intlonglongflag;
198201
}*fmtpar,**fmtparptr;
199202

200203
/* Create enough structures to hold all arguments */
@@ -229,12 +232,12 @@ dopr(char *buffer, const char *format, va_list args, char *end)
229232
longflag=longlongflag=pointflag=0;
230233
fmtbegin=format-1;
231234
realpos=0;
232-
position=0;
235+
position=precision=0;
233236
nextch:
234237
ch=*format++;
235238
switch (ch)
236239
{
237-
case0:
240+
case'\0':
238241
gotoperformpr;
239242
case'-':
240243
ljust=1;
@@ -251,24 +254,29 @@ dopr(char *buffer, const char *format, va_list args, char *end)
251254
case'7':
252255
case'8':
253256
case'9':
254-
if (pointflag)
255-
/* could also be precision */
256-
maxwidth=maxwidth*10+ch-'0';
257-
else
257+
if (!pointflag)
258258
{
259259
len=len*10+ch-'0';
260260
position=position*10+ch-'0';
261261
}
262+
else
263+
{
264+
maxwidth=maxwidth*10+ch-'0';
265+
precision=precision*10+ch-'0';
266+
}
262267
gotonextch;
263268
case'$':
264269
realpos=position;
265270
len=0;
266271
gotonextch;
267272
case'*':
268-
if (pointflag)
269-
maxwidth=va_arg(args,int);
273+
MemSet(&fmtpar[fmtpos],0,sizeof(fmtpar[fmtpos]));
274+
if (!pointflag)
275+
fmtpar[fmtpos].func=FMTLEN;
270276
else
271-
len=va_arg(args,int);
277+
fmtpar[fmtpos].func=FMTWIDTH;
278+
fmtpar[fmtpos].realpos=realpos?realpos:fmtpos;
279+
fmtpos++;
272280
gotonextch;
273281
case'.':
274282
pointflag=1;
@@ -301,68 +309,40 @@ dopr(char *buffer, const char *format, va_list args, char *end)
301309
#endif
302310
case'u':
303311
case'U':
304-
/* fmtnum(value,base,dosign,ljust,len,zpad,&output) */
305-
if (longflag)
306-
{
307-
if (longlongflag)
308-
value=va_arg(args,uint64);
309-
else
310-
value=va_arg(args,unsignedlong);
311-
}
312-
else
313-
value=va_arg(args,unsignedint);
312+
fmtpar[fmtpos].longflag=longflag;
313+
fmtpar[fmtpos].longlongflag=longlongflag;
314314
fmtpar[fmtpos].fmtbegin=fmtbegin;
315315
fmtpar[fmtpos].fmtend=format;
316-
fmtpar[fmtpos].numvalue=value;
317316
fmtpar[fmtpos].base=10;
318317
fmtpar[fmtpos].dosign=0;
319318
fmtpar[fmtpos].ljust=ljust;
320319
fmtpar[fmtpos].len=len;
321320
fmtpar[fmtpos].zpad=zpad;
322-
fmtpar[fmtpos].func=FMTNUM;
321+
fmtpar[fmtpos].func=FMTNUM_U;
323322
fmtpar[fmtpos].realpos=realpos?realpos:fmtpos;
324323
fmtpos++;
325324
break;
326325
case'o':
327326
case'O':
328-
/* fmtnum(value,base,dosign,ljust,len,zpad,&output) */
329-
if (longflag)
330-
{
331-
if (longlongflag)
332-
value=va_arg(args,uint64);
333-
else
334-
value=va_arg(args,unsignedlong);
335-
}
336-
else
337-
value=va_arg(args,unsignedint);
327+
fmtpar[fmtpos].longflag=longflag;
328+
fmtpar[fmtpos].longlongflag=longlongflag;
338329
fmtpar[fmtpos].fmtbegin=fmtbegin;
339330
fmtpar[fmtpos].fmtend=format;
340-
fmtpar[fmtpos].numvalue=value;
341331
fmtpar[fmtpos].base=8;
342332
fmtpar[fmtpos].dosign=0;
343333
fmtpar[fmtpos].ljust=ljust;
344334
fmtpar[fmtpos].len=len;
345335
fmtpar[fmtpos].zpad=zpad;
346-
fmtpar[fmtpos].func=FMTNUM;
336+
fmtpar[fmtpos].func=FMTNUM_U;
347337
fmtpar[fmtpos].realpos=realpos?realpos:fmtpos;
348338
fmtpos++;
349339
break;
350340
case'd':
351341
case'D':
352-
if (longflag)
353-
{
354-
if (longlongflag)
355-
{
356-
value=va_arg(args,int64);
357-
}
358-
else
359-
value=va_arg(args,long);
360-
}
361-
else
362-
value=va_arg(args,int);
342+
fmtpar[fmtpos].longflag=longflag;
343+
fmtpar[fmtpos].longlongflag=longlongflag;
363344
fmtpar[fmtpos].fmtbegin=fmtbegin;
364345
fmtpar[fmtpos].fmtend=format;
365-
fmtpar[fmtpos].numvalue=value;
366346
fmtpar[fmtpos].base=10;
367347
fmtpar[fmtpos].dosign=1;
368348
fmtpar[fmtpos].ljust=ljust;
@@ -373,72 +353,47 @@ dopr(char *buffer, const char *format, va_list args, char *end)
373353
fmtpos++;
374354
break;
375355
case'x':
376-
if (longflag)
377-
{
378-
if (longlongflag)
379-
value=va_arg(args,uint64);
380-
else
381-
value=va_arg(args,unsignedlong);
382-
}
383-
else
384-
value=va_arg(args,unsignedint);
356+
fmtpar[fmtpos].longflag=longflag;
357+
fmtpar[fmtpos].longlongflag=longlongflag;
385358
fmtpar[fmtpos].fmtbegin=fmtbegin;
386359
fmtpar[fmtpos].fmtend=format;
387-
fmtpar[fmtpos].numvalue=value;
388360
fmtpar[fmtpos].base=16;
389361
fmtpar[fmtpos].dosign=0;
390362
fmtpar[fmtpos].ljust=ljust;
391363
fmtpar[fmtpos].len=len;
392364
fmtpar[fmtpos].zpad=zpad;
393-
fmtpar[fmtpos].func=FMTNUM;
365+
fmtpar[fmtpos].func=FMTNUM_U;
394366
fmtpar[fmtpos].realpos=realpos?realpos:fmtpos;
395367
fmtpos++;
396368
break;
397369
case'X':
398-
if (longflag)
399-
{
400-
if (longlongflag)
401-
value=va_arg(args,uint64);
402-
else
403-
value=va_arg(args,unsignedlong);
404-
}
405-
else
406-
value=va_arg(args,unsignedint);
370+
fmtpar[fmtpos].longflag=longflag;
371+
fmtpar[fmtpos].longlongflag=longlongflag;
407372
fmtpar[fmtpos].fmtbegin=fmtbegin;
408373
fmtpar[fmtpos].fmtend=format;
409-
fmtpar[fmtpos].numvalue=value;
410374
fmtpar[fmtpos].base=-16;
411375
fmtpar[fmtpos].dosign=1;
412376
fmtpar[fmtpos].ljust=ljust;
413377
fmtpar[fmtpos].len=len;
414378
fmtpar[fmtpos].zpad=zpad;
415-
fmtpar[fmtpos].func=FMTNUM;
379+
fmtpar[fmtpos].func=FMTNUM_U;
416380
fmtpar[fmtpos].realpos=realpos?realpos:fmtpos;
417381
fmtpos++;
418382
break;
419383
case's':
420-
strvalue=va_arg(args,char*);
421-
if (maxwidth>0|| !pointflag)
422-
{
423-
if (pointflag&&len>maxwidth)
424-
len=maxwidth;/* Adjust padding */
425-
fmtpar[fmtpos].fmtbegin=fmtbegin;
426-
fmtpar[fmtpos].fmtend=format;
427-
fmtpar[fmtpos].value=strvalue;
428-
fmtpar[fmtpos].ljust=ljust;
429-
fmtpar[fmtpos].len=len;
430-
fmtpar[fmtpos].zpad=zpad;
431-
fmtpar[fmtpos].maxwidth=maxwidth;
432-
fmtpar[fmtpos].func=FMTSTR;
433-
fmtpar[fmtpos].realpos=realpos?realpos:fmtpos;
434-
fmtpos++;
435-
}
384+
fmtpar[fmtpos].fmtbegin=fmtbegin;
385+
fmtpar[fmtpos].fmtend=format;
386+
fmtpar[fmtpos].ljust=ljust;
387+
fmtpar[fmtpos].len=len;
388+
fmtpar[fmtpos].zpad=zpad;
389+
fmtpar[fmtpos].maxwidth=maxwidth;
390+
fmtpar[fmtpos].func=FMTSTR;
391+
fmtpar[fmtpos].realpos=realpos?realpos:fmtpos;
392+
fmtpos++;
436393
break;
437394
case'c':
438-
ch=va_arg(args,int);
439395
fmtpar[fmtpos].fmtbegin=fmtbegin;
440396
fmtpar[fmtpos].fmtend=format;
441-
fmtpar[fmtpos].charvalue=ch;
442397
fmtpar[fmtpos].func=FMTCHAR;
443398
fmtpar[fmtpos].realpos=realpos?realpos:fmtpos;
444399
fmtpos++;
@@ -448,15 +403,13 @@ dopr(char *buffer, const char *format, va_list args, char *end)
448403
case'f':
449404
case'g':
450405
case'G':
451-
fvalue=va_arg(args,double);
452406
fmtpar[fmtpos].fmtbegin=fmtbegin;
453407
fmtpar[fmtpos].fmtend=format;
454-
fmtpar[fmtpos].fvalue=fvalue;
455408
fmtpar[fmtpos].type=ch;
456409
fmtpar[fmtpos].ljust=ljust;
457410
fmtpar[fmtpos].len=len;
458411
fmtpar[fmtpos].maxwidth=maxwidth;
459-
fmtpar[fmtpos].precision=position;
412+
fmtpar[fmtpos].precision=precision;
460413
fmtpar[fmtpos].pointflag=pointflag;
461414
fmtpar[fmtpos].func=FMTFLOAT;
462415
fmtpar[fmtpos].realpos=realpos?realpos:fmtpos;
@@ -473,22 +426,74 @@ dopr(char *buffer, const char *format, va_list args, char *end)
473426
break;
474427
}
475428
}
429+
476430
performpr:
477-
/*shuffle pointers */
431+
/*reorder pointers */
478432
for(i=1;i<fmtpos;i++)
479433
fmtparptr[i]=&fmtpar[fmtpar[i].realpos];
434+
435+
/* assign values */
436+
for(i=1;i<fmtpos;i++){
437+
switch(fmtparptr[i]->func){
438+
caseFMTSTR:
439+
fmtparptr[i]->value=va_arg(args,char*);
440+
break;
441+
caseFMTNUM:
442+
if (fmtparptr[i]->longflag)
443+
{
444+
if (fmtparptr[i]->longlongflag)
445+
fmtparptr[i]->numvalue=va_arg(args,int64);
446+
else
447+
fmtparptr[i]->numvalue=va_arg(args,long);
448+
}
449+
else
450+
fmtparptr[i]->numvalue=va_arg(args,int);
451+
break;
452+
caseFMTNUM_U:
453+
if (fmtparptr[i]->longflag)
454+
{
455+
if (fmtparptr[i]->longlongflag)
456+
fmtparptr[i]->numvalue=va_arg(args,uint64);
457+
else
458+
fmtparptr[i]->numvalue=va_arg(args,unsignedlong);
459+
}
460+
else
461+
fmtparptr[i]->numvalue=va_arg(args,unsignedint);
462+
break;
463+
caseFMTFLOAT:
464+
fmtparptr[i]->fvalue=va_arg(args,double);
465+
break;
466+
caseFMTCHAR:
467+
fmtparptr[i]->charvalue=va_arg(args,int);
468+
break;
469+
caseFMTLEN:
470+
if (i+1<fmtpos&&fmtpar[i+1].func!=FMTWIDTH)
471+
fmtpar[i+1].len=va_arg(args,int);
472+
/* For "%*.*f", use the second arg */
473+
if (i+2<fmtpos&&fmtpar[i+1].func==FMTWIDTH)
474+
fmtpar[i+2].len=va_arg(args,int);
475+
break;
476+
caseFMTWIDTH:
477+
if (i+1<fmtpos)
478+
fmtpar[i+1].maxwidth=fmtpar[i+1].precision=
479+
va_arg(args,int);
480+
break;
481+
}
482+
}
483+
484+
/* do the output */
480485
output=buffer;
481486
format=format_save;
482487
while ((ch=*format++))
483488
{
484489
for(i=1;i<fmtpos;i++)
485490
{
486-
if(ch=='%'&&*format=='%')
491+
if(ch=='%'&&*format=='%')
487492
{
488493
format++;
489494
continue;
490495
}
491-
if(fmtpar[i].fmtbegin==format-1)
496+
if(fmtpar[i].fmtbegin==format-1)
492497
{
493498
switch(fmtparptr[i]->func){
494499
caseFMTSTR:
@@ -497,6 +502,7 @@ dopr(char *buffer, const char *format, va_list args, char *end)
497502
fmtparptr[i]->maxwidth,end,&output);
498503
break;
499504
caseFMTNUM:
505+
caseFMTNUM_U:
500506
fmtnum(fmtparptr[i]->numvalue,fmtparptr[i]->base,
501507
fmtparptr[i]->dosign,fmtparptr[i]->ljust,
502508
fmtparptr[i]->len,fmtparptr[i]->zpad,end,&output);

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