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Performance optimization on sqlite3_vsnprintf().

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FossilOrigin-Name: 4430e6e96dbf3d0b464776c132838dd3e456716e0ae5972fc7e0ece13b56ea25
This commit is contained in:
drh 2023-02-25 12:50:54 +00:00
parent 96705c1d7a
commit 0f8aebbfcf
3 changed files with 20 additions and 10 deletions
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12
manifest
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@ -1,5 +1,5 @@
C Add\sthe\s"on"\soption\sto\sthe\s".log"\scommand\sin\sthe\sCLI.\s\sAllow\s".log\son"\sand\n".log\soff"\seven\sin\s--safe\smode.\s\sEnable\sthe\s.log\scommand\sfor\sfiddle\sbuilds. C Performance\soptimization\son\ssqlite3_vsnprintf().
D 2023-02-24T21:23:53.130 D 2023-02-25T12:50:54.857
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F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@ -617,7 +617,7 @@ F src/pcache1.c dee95e3cd2b61e6512dc814c5ab76d5eb36f0bfc9441dbb4260fccc0d12bbddc
F src/pragma.c 82d5090a35eac75876d3b41f48d06b2370553c9576bf2942233c462e03eb94c9 F src/pragma.c 82d5090a35eac75876d3b41f48d06b2370553c9576bf2942233c462e03eb94c9
F src/pragma.h e690a356c18e98414d2e870ea791c1be1545a714ba623719deb63f7f226d8bb7 F src/pragma.h e690a356c18e98414d2e870ea791c1be1545a714ba623719deb63f7f226d8bb7
F src/prepare.c ce87a08cfddd45a147150db34190b1986f2d4a0e0828858cb6bd908c78fb02e3 F src/prepare.c ce87a08cfddd45a147150db34190b1986f2d4a0e0828858cb6bd908c78fb02e3
F src/printf.c 5957a30d107a3916a411cb979b9ee80447dc3717aecc4648a4d8cce0f929e508 F src/printf.c fb31597cf93200eba9167573094ee312b0d51b2c1998613284ceb2c8c212b492
F src/random.c 606b00941a1d7dd09c381d3279a058d771f406c5213c9932bbd93d5587be4b9c F src/random.c 606b00941a1d7dd09c381d3279a058d771f406c5213c9932bbd93d5587be4b9c
F src/resolve.c d62c5665279cc7485f9d45b5e20911cc7b19c203f268321a90d05d74f4725750 F src/resolve.c d62c5665279cc7485f9d45b5e20911cc7b19c203f268321a90d05d74f4725750
F src/rowset.c ba9515a922af32abe1f7d39406b9d35730ed65efab9443dc5702693b60854c92 F src/rowset.c ba9515a922af32abe1f7d39406b9d35730ed65efab9443dc5702693b60854c92
@ -2046,8 +2046,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
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U drh U drh
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# Remove this line to create a well-formed Fossil manifest. # Remove this line to create a well-formed Fossil manifest.

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6bba9100ae81466eeb49845c449cbfddf4f82f18b89f55e6ef575cbf66af63af 4430e6e96dbf3d0b464776c132838dd3e456716e0ae5972fc7e0ece13b56ea25

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src/printf.c
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@ -1361,12 +1361,22 @@ char *sqlite3_vsnprintf(int n, char *zBuf, const char *zFormat, va_list ap){
return zBuf; return zBuf;
} }
char *sqlite3_snprintf(int n, char *zBuf, const char *zFormat, ...){ char *sqlite3_snprintf(int n, char *zBuf, const char *zFormat, ...){
char *z; StrAccum acc;
va_list ap; va_list ap;
if( n<=0 ) return zBuf;
#ifdef SQLITE_ENABLE_API_ARMOR
if( zBuf==0 || zFormat==0 ) {
(void)SQLITE_MISUSE_BKPT;
if( zBuf ) zBuf[0] = 0;
return zBuf;
}
#endif
sqlite3StrAccumInit(&acc, 0, zBuf, n, 0);
va_start(ap,zFormat); va_start(ap,zFormat);
z = sqlite3_vsnprintf(n, zBuf, zFormat, ap); sqlite3_str_vappendf(&acc, zFormat, ap);
va_end(ap); va_end(ap);
return z; zBuf[acc.nChar] = 0;
return zBuf;
} }
/* /*