From: drh <drh@noemail.net>
Date: Mon, 19 Feb 2018 18:03:10 +0000 (+0000)
Subject: Make the alternate-form-2 flag ("!") change the meaning of width and precision
X-Git-Tag: version-3.23.0~117^2~4
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=57e3ba7623c1d819399f779e83372fea1727b9bf;p=thirdparty%2Fsqlite.git

Make the alternate-form-2 flag ("!") change the meaning of width and precision
from bytes to characters for the %q, %Q, and %w extensions of printf().

FossilOrigin-Name: 391540acbea34eb88c75b1152b458d8936b3fdfff47633b9ec897775b015ba4c
---

diff --git a/manifest b/manifest
index 51334ef416..867a07179e 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C In\sthe\sprintf()\slibrary,\smeasure\swidth\sand\sprecision\sin\scharacters\srather\nthan\sbytes\sif\sthe\s"!"\s(alternate-form-2)\sflag\sis\spresent\son\sa\s%s\sor\s%z\nsubstitution.
-D 2018-02-19T17:03:23.575
+C Make\sthe\salternate-form-2\sflag\s("!")\schange\sthe\smeaning\sof\swidth\sand\sprecision\nfrom\sbytes\sto\scharacters\sfor\sthe\s%q,\s%Q,\sand\s%w\sextensions\sof\sprintf().
+D 2018-02-19T18:03:10.959
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F Makefile.in 7a3f714b4fcf793108042b7b0a5c720b0b310ec84314d61ba7f3f49f27e550ea
@@ -484,7 +484,7 @@ F src/pcache1.c 716975564c15eb6679e97f734cec1bfd6c16ac3d4010f05f1f8e509fc7d19880
 F src/pragma.c bea56df3ae0637768c0da4fbbb8f2492f780980d95000034a105ff291bf7ca69
 F src/pragma.h bb83728944b42f6d409c77f5838a8edbdb0fe83046c5496ffc9602b40340a324
 F src/prepare.c 259f4e7960c47082c9653f3d5f0c294abd68bb9c3aab86de7630700cba1c20fb
-F src/printf.c a94897345b3228d97c6aa06297890b7c62bc47acc86e34d3634d125426d78695
+F src/printf.c ab91b63394bf07a430af0c644f8e42ca136c015e2533544f585dab8b0a408b84
 F src/random.c 80f5d666f23feb3e6665a6ce04c7197212a88384
 F src/resolve.c bbee7e31d369a18a2f4836644769882e9c5d40ef4a3af911db06410b65cb3730
 F src/rowset.c 7b7e7e479212e65b723bf40128c7b36dc5afdfac
@@ -1707,10 +1707,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 38f654dc117bb11d61407327884b5c913cfaf920547bebc4ce5a4cf983e5c20e
-R 07cd50bae7c4080dd411c728ce9cf3a0
-T *branch * printf-enhancement
-T *sym-printf-enhancement *
-T -sym-trunk *
+P ca31c6630422fca70e626dd38aae96296bd8535d491ca52391624a5e7e663636
+R d4aa6a8346f9339a7533b828b4137a72
 U drh
-Z 9d6ee38fe0b61a32cc5a7309de027572
+Z bc6f530d4e962e8540ac43cd25813033
diff --git a/manifest.uuid b/manifest.uuid
index 29c0e9958e..50989e81be 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-ca31c6630422fca70e626dd38aae96296bd8535d491ca52391624a5e7e663636
\ No newline at end of file
+391540acbea34eb88c75b1152b458d8936b3fdfff47633b9ec897775b015ba4c
\ No newline at end of file
diff --git a/src/printf.c b/src/printf.c
index f6980c90db..ff948ff5a4 100644
--- a/src/printf.c
+++ b/src/printf.c
@@ -668,15 +668,16 @@ void sqlite3VXPrintf(
         }else{
           length = 0x7fffffff & (int)strlen(bufpt);
         }
+      adjust_width_for_utf8:
         if( flag_altform2 && width>0 ){
           /* Adjust width to account for extra bytes in UTF-8 characters */
           int ii = length - 1;
           while( ii>=0 ) if( (bufpt[ii--] & 0xc0)==0x80 ) width++;
         }
         break;
-      case etSQLESCAPE:           /* Escape ' characters */
-      case etSQLESCAPE2:          /* Escape ' and enclose in '...' */
-      case etSQLESCAPE3: {        /* Escape " characters */
+      case etSQLESCAPE:           /* %q: Escape ' characters */
+      case etSQLESCAPE2:          /* %Q: Escape ' and enclose in '...' */
+      case etSQLESCAPE3: {        /* %w: Escape " characters */
         int i, j, k, n, isnull;
         int needQuote;
         char ch;
@@ -690,9 +691,17 @@ void sqlite3VXPrintf(
         }
         isnull = escarg==0;
         if( isnull ) escarg = (xtype==etSQLESCAPE2 ? "NULL" : "(NULL)");
+        /* For %q, %Q, and %w, the precision is the number of byte (or
+        ** characters if the ! flags is present) to use from the input.
+        ** Because of the extra quoting characters inserted, the number
+        ** of output characters may be larger than the precision.
+        */
         k = precision;
         for(i=n=0; k!=0 && (ch=escarg[i])!=0; i++, k--){
           if( ch==q )  n++;
+          if( flag_altform2 && (ch&0xc0)==0xc0 ){
+            while( (escarg[i+1]&0xc0)==0x80 ){ i++; }
+          }
         }
         needQuote = !isnull && xtype==etSQLESCAPE2;
         n += i + 3;
@@ -715,10 +724,7 @@ void sqlite3VXPrintf(
         if( needQuote ) bufpt[j++] = q;
         bufpt[j] = 0;
         length = j;
-        /* The precision in %q and %Q means how many input bytes to
-        ** consume, not the length of the output...
-        ** if( precision>=0 && precision<length ) length = precision; */
-        break;
+        goto adjust_width_for_utf8;
       }
       case etTOKEN: {
         Token *pToken;