diff options
Diffstat (limited to 'ext/sqlite/libsqlite/src/printf.c')
| -rw-r--r-- | ext/sqlite/libsqlite/src/printf.c | 824 |
1 files changed, 824 insertions, 0 deletions
diff --git a/ext/sqlite/libsqlite/src/printf.c b/ext/sqlite/libsqlite/src/printf.c new file mode 100644 index 0000000000..387ea1c2da --- /dev/null +++ b/ext/sqlite/libsqlite/src/printf.c @@ -0,0 +1,824 @@ +/* +** The "printf" code that follows dates from the 1980's. It is in +** the public domain. The original comments are included here for +** completeness. They are slightly out-of-date. +** +** The following modules is an enhanced replacement for the "printf" subroutines +** found in the standard C library. The following enhancements are +** supported: +** +** + Additional functions. The standard set of "printf" functions +** includes printf, fprintf, sprintf, vprintf, vfprintf, and +** vsprintf. This module adds the following: +** +** * snprintf -- Works like sprintf, but has an extra argument +** which is the size of the buffer written to. +** +** * mprintf -- Similar to sprintf. Writes output to memory +** obtained from malloc. +** +** * xprintf -- Calls a function to dispose of output. +** +** * nprintf -- No output, but returns the number of characters +** that would have been output by printf. +** +** * A v- version (ex: vsnprintf) of every function is also +** supplied. +** +** + A few extensions to the formatting notation are supported: +** +** * The "=" flag (similar to "-") causes the output to be +** be centered in the appropriately sized field. +** +** * The %b field outputs an integer in binary notation. +** +** * The %c field now accepts a precision. The character output +** is repeated by the number of times the precision specifies. +** +** * The %' field works like %c, but takes as its character the +** next character of the format string, instead of the next +** argument. For example, printf("%.78'-") prints 78 minus +** signs, the same as printf("%.78c",'-'). +** +** + When compiled using GCC on a SPARC, this version of printf is +** faster than the library printf for SUN OS 4.1. +** +** + All functions are fully reentrant. +** +*/ +#include "sqliteInt.h" + +/* +** Undefine COMPATIBILITY to make some slight changes in the way things +** work. I think the changes are an improvement, but they are not +** backwards compatible. +*/ +/* #define COMPATIBILITY / * Compatible with SUN OS 4.1 */ + +/* +** Conversion types fall into various categories as defined by the +** following enumeration. +*/ +enum et_type { /* The type of the format field */ + etRADIX, /* Integer types. %d, %x, %o, and so forth */ + etFLOAT, /* Floating point. %f */ + etEXP, /* Exponentional notation. %e and %E */ + etGENERIC, /* Floating or exponential, depending on exponent. %g */ + etSIZE, /* Return number of characters processed so far. %n */ + etSTRING, /* Strings. %s */ + etPERCENT, /* Percent symbol. %% */ + etCHARX, /* Characters. %c */ + etERROR, /* Used to indicate no such conversion type */ +/* The rest are extensions, not normally found in printf() */ + etCHARLIT, /* Literal characters. %' */ + etSQLESCAPE, /* Strings with '\'' doubled. %q */ + etSQLESCAPE2, /* Strings with '\'' doubled and enclosed in '', + NULL pointers replaced by SQL NULL. %Q */ + etORDINAL /* 1st, 2nd, 3rd and so forth */ +}; + +/* +** Each builtin conversion character (ex: the 'd' in "%d") is described +** by an instance of the following structure +*/ +typedef struct et_info { /* Information about each format field */ + int fmttype; /* The format field code letter */ + int base; /* The base for radix conversion */ + char *charset; /* The character set for conversion */ + int flag_signed; /* Is the quantity signed? */ + char *prefix; /* Prefix on non-zero values in alt format */ + enum et_type type; /* Conversion paradigm */ +} et_info; + +/* +** The following table is searched linearly, so it is good to put the +** most frequently used conversion types first. +*/ +static et_info fmtinfo[] = { + { 'd', 10, "0123456789", 1, 0, etRADIX, }, + { 's', 0, 0, 0, 0, etSTRING, }, + { 'q', 0, 0, 0, 0, etSQLESCAPE, }, + { 'Q', 0, 0, 0, 0, etSQLESCAPE2, }, + { 'c', 0, 0, 0, 0, etCHARX, }, + { 'o', 8, "01234567", 0, "0", etRADIX, }, + { 'u', 10, "0123456789", 0, 0, etRADIX, }, + { 'x', 16, "0123456789abcdef", 0, "x0", etRADIX, }, + { 'X', 16, "0123456789ABCDEF", 0, "X0", etRADIX, }, + { 'r', 10, "0123456789", 0, 0, etORDINAL, }, + { 'f', 0, 0, 1, 0, etFLOAT, }, + { 'e', 0, "e", 1, 0, etEXP, }, + { 'E', 0, "E", 1, 0, etEXP, }, + { 'g', 0, "e", 1, 0, etGENERIC, }, + { 'G', 0, "E", 1, 0, etGENERIC, }, + { 'i', 10, "0123456789", 1, 0, etRADIX, }, + { 'n', 0, 0, 0, 0, etSIZE, }, + { '%', 0, 0, 0, 0, etPERCENT, }, + { 'b', 2, "01", 0, "b0", etRADIX, }, /* Binary */ + { 'p', 10, "0123456789", 0, 0, etRADIX, }, /* Pointers */ + { '\'', 0, 0, 0, 0, etCHARLIT, }, /* Literal char */ +}; +#define etNINFO (sizeof(fmtinfo)/sizeof(fmtinfo[0])) + +/* +** If NOFLOATINGPOINT is defined, then none of the floating point +** conversions will work. +*/ +#ifndef etNOFLOATINGPOINT +/* +** "*val" is a double such that 0.1 <= *val < 10.0 +** Return the ascii code for the leading digit of *val, then +** multiply "*val" by 10.0 to renormalize. +** +** Example: +** input: *val = 3.14159 +** output: *val = 1.4159 function return = '3' +** +** The counter *cnt is incremented each time. After counter exceeds +** 16 (the number of significant digits in a 64-bit float) '0' is +** always returned. +*/ +static int et_getdigit(double *val, int *cnt){ + int digit; + double d; + if( (*cnt)++ >= 16 ) return '0'; + digit = (int)*val; + d = digit; + digit += '0'; + *val = (*val - d)*10.0; + return digit; +} +#endif + +#define etBUFSIZE 1000 /* Size of the output buffer */ + +/* +** The root program. All variations call this core. +** +** INPUTS: +** func This is a pointer to a function taking three arguments +** 1. A pointer to anything. Same as the "arg" parameter. +** 2. A pointer to the list of characters to be output +** (Note, this list is NOT null terminated.) +** 3. An integer number of characters to be output. +** (Note: This number might be zero.) +** +** arg This is the pointer to anything which will be passed as the +** first argument to "func". Use it for whatever you like. +** +** fmt This is the format string, as in the usual print. +** +** ap This is a pointer to a list of arguments. Same as in +** vfprint. +** +** OUTPUTS: +** The return value is the total number of characters sent to +** the function "func". Returns -1 on a error. +** +** Note that the order in which automatic variables are declared below +** seems to make a big difference in determining how fast this beast +** will run. +*/ +static int vxprintf( + void (*func)(void*,char*,int), + void *arg, + const char *format, + va_list ap +){ + register const char *fmt; /* The format string. */ + register int c; /* Next character in the format string */ + register char *bufpt; /* Pointer to the conversion buffer */ + register int precision; /* Precision of the current field */ + register int length; /* Length of the field */ + register int idx; /* A general purpose loop counter */ + int count; /* Total number of characters output */ + int width; /* Width of the current field */ + int flag_leftjustify; /* True if "-" flag is present */ + int flag_plussign; /* True if "+" flag is present */ + int flag_blanksign; /* True if " " flag is present */ + int flag_alternateform; /* True if "#" flag is present */ + int flag_zeropad; /* True if field width constant starts with zero */ + int flag_long; /* True if "l" flag is present */ + int flag_center; /* True if "=" flag is present */ + unsigned long longvalue; /* Value for integer types */ + double realvalue; /* Value for real types */ + et_info *infop; /* Pointer to the appropriate info structure */ + char buf[etBUFSIZE]; /* Conversion buffer */ + char prefix; /* Prefix character. "+" or "-" or " " or '\0'. */ + int errorflag = 0; /* True if an error is encountered */ + enum et_type xtype; /* Conversion paradigm */ + char *zExtra; /* Extra memory used for etTCLESCAPE conversions */ + static char spaces[] = " " + " "; +#define etSPACESIZE (sizeof(spaces)-1) +#ifndef etNOFLOATINGPOINT + int exp; /* exponent of real numbers */ + double rounder; /* Used for rounding floating point values */ + int flag_dp; /* True if decimal point should be shown */ + int flag_rtz; /* True if trailing zeros should be removed */ + int flag_exp; /* True to force display of the exponent */ + int nsd; /* Number of significant digits returned */ +#endif + + fmt = format; /* Put in a register for speed */ + count = length = 0; + bufpt = 0; + for(; (c=(*fmt))!=0; ++fmt){ + if( c!='%' ){ + register int amt; + bufpt = (char *)fmt; + amt = 1; + while( (c=(*++fmt))!='%' && c!=0 ) amt++; + (*func)(arg,bufpt,amt); + count += amt; + if( c==0 ) break; + } + if( (c=(*++fmt))==0 ){ + errorflag = 1; + (*func)(arg,"%",1); + count++; + break; + } + /* Find out what flags are present */ + flag_leftjustify = flag_plussign = flag_blanksign = + flag_alternateform = flag_zeropad = flag_center = 0; + do{ + switch( c ){ + case '-': flag_leftjustify = 1; c = 0; break; + case '+': flag_plussign = 1; c = 0; break; + case ' ': flag_blanksign = 1; c = 0; break; + case '#': flag_alternateform = 1; c = 0; break; + case '0': flag_zeropad = 1; c = 0; break; + case '=': flag_center = 1; c = 0; break; + default: break; + } + }while( c==0 && (c=(*++fmt))!=0 ); + if( flag_center ) flag_leftjustify = 0; + /* Get the field width */ + width = 0; + if( c=='*' ){ + width = va_arg(ap,int); + if( width<0 ){ + flag_leftjustify = 1; + width = -width; + } + c = *++fmt; + }else{ + while( c>='0' && c<='9' ){ + width = width*10 + c - '0'; + c = *++fmt; + } + } + if( width > etBUFSIZE-10 ){ + width = etBUFSIZE-10; + } + /* Get the precision */ + if( c=='.' ){ + precision = 0; + c = *++fmt; + if( c=='*' ){ + precision = va_arg(ap,int); +#ifndef etCOMPATIBILITY + /* This is sensible, but SUN OS 4.1 doesn't do it. */ + if( precision<0 ) precision = -precision; +#endif + c = *++fmt; + }else{ + while( c>='0' && c<='9' ){ + precision = precision*10 + c - '0'; + c = *++fmt; + } + } + /* Limit the precision to prevent overflowing buf[] during conversion */ + if( precision>etBUFSIZE-40 ) precision = etBUFSIZE-40; + }else{ + precision = -1; + } + /* Get the conversion type modifier */ + if( c=='l' ){ + flag_long = 1; + c = *++fmt; + }else{ + flag_long = 0; + } + /* Fetch the info entry for the field */ + infop = 0; + for(idx=0; idx<etNINFO; idx++){ + if( c==fmtinfo[idx].fmttype ){ + infop = &fmtinfo[idx]; + break; + } + } + /* No info entry found. It must be an error. */ + if( infop==0 ){ + xtype = etERROR; + }else{ + xtype = infop->type; + } + zExtra = 0; + + /* + ** At this point, variables are initialized as follows: + ** + ** flag_alternateform TRUE if a '#' is present. + ** flag_plussign TRUE if a '+' is present. + ** flag_leftjustify TRUE if a '-' is present or if the + ** field width was negative. + ** flag_zeropad TRUE if the width began with 0. + ** flag_long TRUE if the letter 'l' (ell) prefixed + ** the conversion character. + ** flag_blanksign TRUE if a ' ' is present. + ** width The specified field width. This is + ** always non-negative. Zero is the default. + ** precision The specified precision. The default + ** is -1. + ** xtype The class of the conversion. + ** infop Pointer to the appropriate info struct. + */ + switch( xtype ){ + case etORDINAL: + case etRADIX: + if( flag_long ) longvalue = va_arg(ap,long); + else longvalue = va_arg(ap,int); +#ifdef etCOMPATIBILITY + /* For the format %#x, the value zero is printed "0" not "0x0". + ** I think this is stupid. */ + if( longvalue==0 ) flag_alternateform = 0; +#else + /* More sensible: turn off the prefix for octal (to prevent "00"), + ** but leave the prefix for hex. */ + if( longvalue==0 && infop->base==8 ) flag_alternateform = 0; +#endif + if( infop->flag_signed ){ + if( *(long*)&longvalue<0 ){ + longvalue = -*(long*)&longvalue; + prefix = '-'; + }else if( flag_plussign ) prefix = '+'; + else if( flag_blanksign ) prefix = ' '; + else prefix = 0; + }else prefix = 0; + if( flag_zeropad && precision<width-(prefix!=0) ){ + precision = width-(prefix!=0); + } + bufpt = &buf[etBUFSIZE]; + if( xtype==etORDINAL ){ + long a,b; + a = longvalue%10; + b = longvalue%100; + bufpt -= 2; + if( a==0 || a>3 || (b>10 && b<14) ){ + bufpt[0] = 't'; + bufpt[1] = 'h'; + }else if( a==1 ){ + bufpt[0] = 's'; + bufpt[1] = 't'; + }else if( a==2 ){ + bufpt[0] = 'n'; + bufpt[1] = 'd'; + }else if( a==3 ){ + bufpt[0] = 'r'; + bufpt[1] = 'd'; + } + } + { + register char *cset; /* Use registers for speed */ + register int base; + cset = infop->charset; + base = infop->base; + do{ /* Convert to ascii */ + *(--bufpt) = cset[longvalue%base]; + longvalue = longvalue/base; + }while( longvalue>0 ); + } + length = (long)&buf[etBUFSIZE]-(long)bufpt; + for(idx=precision-length; idx>0; idx--){ + *(--bufpt) = '0'; /* Zero pad */ + } + if( prefix ) *(--bufpt) = prefix; /* Add sign */ + if( flag_alternateform && infop->prefix ){ /* Add "0" or "0x" */ + char *pre, x; + pre = infop->prefix; + if( *bufpt!=pre[0] ){ + for(pre=infop->prefix; (x=(*pre))!=0; pre++) *(--bufpt) = x; + } + } + length = (long)&buf[etBUFSIZE]-(long)bufpt; + break; + case etFLOAT: + case etEXP: + case etGENERIC: + realvalue = va_arg(ap,double); +#ifndef etNOFLOATINGPOINT + if( precision<0 ) precision = 6; /* Set default precision */ + if( precision>etBUFSIZE-10 ) precision = etBUFSIZE-10; + if( realvalue<0.0 ){ + realvalue = -realvalue; + prefix = '-'; + }else{ + if( flag_plussign ) prefix = '+'; + else if( flag_blanksign ) prefix = ' '; + else prefix = 0; + } + if( infop->type==etGENERIC && precision>0 ) precision--; + rounder = 0.0; +#ifdef COMPATIBILITY + /* Rounding works like BSD when the constant 0.4999 is used. Wierd! */ + for(idx=precision, rounder=0.4999; idx>0; idx--, rounder*=0.1); +#else + /* It makes more sense to use 0.5 */ + for(idx=precision, rounder=0.5; idx>0; idx--, rounder*=0.1); +#endif + if( infop->type==etFLOAT ) realvalue += rounder; + /* Normalize realvalue to within 10.0 > realvalue >= 1.0 */ + exp = 0; + if( realvalue>0.0 ){ + int k = 0; + while( realvalue>=1e8 && k++<100 ){ realvalue *= 1e-8; exp+=8; } + while( realvalue>=10.0 && k++<100 ){ realvalue *= 0.1; exp++; } + while( realvalue<1e-8 && k++<100 ){ realvalue *= 1e8; exp-=8; } + while( realvalue<1.0 && k++<100 ){ realvalue *= 10.0; exp--; } + if( k>=100 ){ + bufpt = "NaN"; + length = 3; + break; + } + } + bufpt = buf; + /* + ** If the field type is etGENERIC, then convert to either etEXP + ** or etFLOAT, as appropriate. + */ + flag_exp = xtype==etEXP; + if( xtype!=etFLOAT ){ + realvalue += rounder; + if( realvalue>=10.0 ){ realvalue *= 0.1; exp++; } + } + if( xtype==etGENERIC ){ + flag_rtz = !flag_alternateform; + if( exp<-4 || exp>precision ){ + xtype = etEXP; + }else{ + precision = precision - exp; + xtype = etFLOAT; + } + }else{ + flag_rtz = 0; + } + /* + ** The "exp+precision" test causes output to be of type etEXP if + ** the precision is too large to fit in buf[]. + */ + nsd = 0; + if( xtype==etFLOAT && exp+precision<etBUFSIZE-30 ){ + flag_dp = (precision>0 || flag_alternateform); + if( prefix ) *(bufpt++) = prefix; /* Sign */ + if( exp<0 ) *(bufpt++) = '0'; /* Digits before "." */ + else for(; exp>=0; exp--) *(bufpt++) = et_getdigit(&realvalue,&nsd); + if( flag_dp ) *(bufpt++) = '.'; /* The decimal point */ + for(exp++; exp<0 && precision>0; precision--, exp++){ + *(bufpt++) = '0'; + } + while( (precision--)>0 ) *(bufpt++) = et_getdigit(&realvalue,&nsd); + *(bufpt--) = 0; /* Null terminate */ + if( flag_rtz && flag_dp ){ /* Remove trailing zeros and "." */ + while( bufpt>=buf && *bufpt=='0' ) *(bufpt--) = 0; + if( bufpt>=buf && *bufpt=='.' ) *(bufpt--) = 0; + } + bufpt++; /* point to next free slot */ + }else{ /* etEXP or etGENERIC */ + flag_dp = (precision>0 || flag_alternateform); + if( prefix ) *(bufpt++) = prefix; /* Sign */ + *(bufpt++) = et_getdigit(&realvalue,&nsd); /* First digit */ + if( flag_dp ) *(bufpt++) = '.'; /* Decimal point */ + while( (precision--)>0 ) *(bufpt++) = et_getdigit(&realvalue,&nsd); + bufpt--; /* point to last digit */ + if( flag_rtz && flag_dp ){ /* Remove tail zeros */ + while( bufpt>=buf && *bufpt=='0' ) *(bufpt--) = 0; + if( bufpt>=buf && *bufpt=='.' ) *(bufpt--) = 0; + } + bufpt++; /* point to next free slot */ + if( exp || flag_exp ){ + *(bufpt++) = infop->charset[0]; + if( exp<0 ){ *(bufpt++) = '-'; exp = -exp; } /* sign of exp */ + else { *(bufpt++) = '+'; } + if( exp>=100 ){ + *(bufpt++) = (exp/100)+'0'; /* 100's digit */ + exp %= 100; + } + *(bufpt++) = exp/10+'0'; /* 10's digit */ + *(bufpt++) = exp%10+'0'; /* 1's digit */ + } + } + /* The converted number is in buf[] and zero terminated. Output it. + ** Note that the number is in the usual order, not reversed as with + ** integer conversions. */ + length = (long)bufpt-(long)buf; + bufpt = buf; + + /* Special case: Add leading zeros if the flag_zeropad flag is + ** set and we are not left justified */ + if( flag_zeropad && !flag_leftjustify && length < width){ + int i; + int nPad = width - length; + for(i=width; i>=nPad; i--){ + bufpt[i] = bufpt[i-nPad]; + } + i = prefix!=0; + while( nPad-- ) bufpt[i++] = '0'; + length = width; + } +#endif + break; + case etSIZE: + *(va_arg(ap,int*)) = count; + length = width = 0; + break; + case etPERCENT: + buf[0] = '%'; + bufpt = buf; + length = 1; + break; + case etCHARLIT: + case etCHARX: + c = buf[0] = (xtype==etCHARX ? va_arg(ap,int) : *++fmt); + if( precision>=0 ){ + for(idx=1; idx<precision; idx++) buf[idx] = c; + length = precision; + }else{ + length =1; + } + bufpt = buf; + break; + case etSTRING: + bufpt = va_arg(ap,char*); + if( bufpt==0 ) bufpt = "(null)"; + length = strlen(bufpt); + if( precision>=0 && precision<length ) length = precision; + break; + case etSQLESCAPE: + case etSQLESCAPE2: + { + int i, j, n, c, isnull; + char *arg = va_arg(ap,char*); + isnull = arg==0; + if( isnull ) arg = (xtype==etSQLESCAPE2 ? "NULL" : "(NULL)"); + for(i=n=0; (c=arg[i])!=0; i++){ + if( c=='\'' ) n++; + } + n += i + 1 + ((!isnull && xtype==etSQLESCAPE2) ? 2 : 0); + if( n>etBUFSIZE ){ + bufpt = zExtra = sqliteMalloc( n ); + if( bufpt==0 ) return -1; + }else{ + bufpt = buf; + } + j = 0; + if( !isnull && xtype==etSQLESCAPE2 ) bufpt[j++] = '\''; + for(i=0; (c=arg[i])!=0; i++){ + bufpt[j++] = c; + if( c=='\'' ) bufpt[j++] = c; + } + if( !isnull && xtype==etSQLESCAPE2 ) bufpt[j++] = '\''; + bufpt[j] = 0; + length = j; + if( precision>=0 && precision<length ) length = precision; + } + break; + case etERROR: + buf[0] = '%'; + buf[1] = c; + errorflag = 0; + idx = 1+(c!=0); + (*func)(arg,"%",idx); + count += idx; + if( c==0 ) fmt--; + break; + }/* End switch over the format type */ + /* + ** The text of the conversion is pointed to by "bufpt" and is + ** "length" characters long. The field width is "width". Do + ** the output. + */ + if( !flag_leftjustify ){ + register int nspace; + nspace = width-length; + if( nspace>0 ){ + if( flag_center ){ + nspace = nspace/2; + width -= nspace; + flag_leftjustify = 1; + } + count += nspace; + while( nspace>=etSPACESIZE ){ + (*func)(arg,spaces,etSPACESIZE); + nspace -= etSPACESIZE; + } + if( nspace>0 ) (*func)(arg,spaces,nspace); + } + } + if( length>0 ){ + (*func)(arg,bufpt,length); + count += length; + } + if( flag_leftjustify ){ + register int nspace; + nspace = width-length; + if( nspace>0 ){ + count += nspace; + while( nspace>=etSPACESIZE ){ + (*func)(arg,spaces,etSPACESIZE); + nspace -= etSPACESIZE; + } + if( nspace>0 ) (*func)(arg,spaces,nspace); + } + } + if( zExtra ){ + sqliteFree(zExtra); + } + }/* End for loop over the format string */ + return errorflag ? -1 : count; +} /* End of function */ + + +/* This structure is used to store state information about the +** write to memory that is currently in progress. +*/ +struct sgMprintf { + char *zBase; /* A base allocation */ + char *zText; /* The string collected so far */ + int nChar; /* Length of the string so far */ + int nAlloc; /* Amount of space allocated in zText */ +}; + +/* +** This function implements the callback from vxprintf. +** +** This routine add nNewChar characters of text in zNewText to +** the sgMprintf structure pointed to by "arg". +*/ +static void mout(void *arg, char *zNewText, int nNewChar){ + struct sgMprintf *pM = (struct sgMprintf*)arg; + if( pM->nChar + nNewChar + 1 > pM->nAlloc ){ + pM->nAlloc = pM->nChar + nNewChar*2 + 1; + if( pM->zText==pM->zBase ){ + pM->zText = sqliteMalloc(pM->nAlloc); + if( pM->zText && pM->nChar ) memcpy(pM->zText,pM->zBase,pM->nChar); + }else{ + char *z = sqliteRealloc(pM->zText, pM->nAlloc); + if( z==0 ){ + sqliteFree(pM->zText); + pM->nChar = 0; + pM->nAlloc = 0; + } + pM->zText = z; + } + } + if( pM->zText ){ + memcpy(&pM->zText[pM->nChar], zNewText, nNewChar); + pM->nChar += nNewChar; + pM->zText[pM->nChar] = 0; + } +} + +/* +** sqlite_mprintf() works like printf(), but allocations memory to hold the +** resulting string and returns a pointer to the allocated memory. Use +** sqliteFree() to release the memory allocated. +*/ +char *sqliteMPrintf(const char *zFormat, ...){ + va_list ap; + struct sgMprintf sMprintf; + char *zNew; + char zBuf[200]; + + sMprintf.nChar = 0; + sMprintf.nAlloc = sizeof(zBuf); + sMprintf.zText = zBuf; + sMprintf.zBase = zBuf; + va_start(ap,zFormat); + vxprintf(mout,&sMprintf,zFormat,ap); + va_end(ap); + sMprintf.zText[sMprintf.nChar] = 0; + return sqliteRealloc(sMprintf.zText, sMprintf.nChar+1); +} + +/* +** sqlite_mprintf() works like printf(), but allocations memory to hold the +** resulting string and returns a pointer to the allocated memory. Use +** sqliteFree() to release the memory allocated. +*/ +char *sqlite_mprintf(const char *zFormat, ...){ + va_list ap; + struct sgMprintf sMprintf; + char *zNew; + char zBuf[200]; + + sMprintf.nChar = 0; + sMprintf.nAlloc = sizeof(zBuf); + sMprintf.zText = zBuf; + sMprintf.zBase = zBuf; + va_start(ap,zFormat); + vxprintf(mout,&sMprintf,zFormat,ap); + va_end(ap); + sMprintf.zText[sMprintf.nChar] = 0; + zNew = malloc( sMprintf.nChar+1 ); + if( zNew ) strcpy(zNew,sMprintf.zText); + if( sMprintf.zText!=sMprintf.zBase ){ + sqliteFree(sMprintf.zText); + } + return zNew; +} + +/* This is the varargs version of sqlite_mprintf. +*/ +char *sqlite_vmprintf(const char *zFormat, va_list ap){ + struct sgMprintf sMprintf; + char *zNew; + char zBuf[200]; + sMprintf.nChar = 0; + sMprintf.zText = zBuf; + sMprintf.nAlloc = sizeof(zBuf); + sMprintf.zBase = zBuf; + vxprintf(mout,&sMprintf,zFormat,ap); + sMprintf.zText[sMprintf.nChar] = 0; + zNew = malloc( sMprintf.nChar+1 ); + if( zNew ) strcpy(zNew,sMprintf.zText); + if( sMprintf.zText!=sMprintf.zBase ){ + sqliteFree(sMprintf.zText); + } + return zNew; +} + +/* +** The following four routines implement the varargs versions of the +** sqlite_exec() and sqlite_get_table() interfaces. See the sqlite.h +** header files for a more detailed description of how these interfaces +** work. +** +** These routines are all just simple wrappers. +*/ +int sqlite_exec_printf( + sqlite *db, /* An open database */ + const char *sqlFormat, /* printf-style format string for the SQL */ + sqlite_callback xCallback, /* Callback function */ + void *pArg, /* 1st argument to callback function */ + char **errmsg, /* Error msg written here */ + ... /* Arguments to the format string. */ +){ + va_list ap; + int rc; + + va_start(ap, errmsg); + rc = sqlite_exec_vprintf(db, sqlFormat, xCallback, pArg, errmsg, ap); + va_end(ap); + return rc; +} +int sqlite_exec_vprintf( + sqlite *db, /* An open database */ + const char *sqlFormat, /* printf-style format string for the SQL */ + sqlite_callback xCallback, /* Callback function */ + void *pArg, /* 1st argument to callback function */ + char **errmsg, /* Error msg written here */ + va_list ap /* Arguments to the format string. */ +){ + char *zSql; + int rc; + + zSql = sqlite_vmprintf(sqlFormat, ap); + rc = sqlite_exec(db, zSql, xCallback, pArg, errmsg); + free(zSql); + return rc; +} +int sqlite_get_table_printf( + sqlite *db, /* An open database */ + const char *sqlFormat, /* printf-style format string for the SQL */ + char ***resultp, /* Result written to a char *[] that this points to */ + int *nrow, /* Number of result rows written here */ + int *ncol, /* Number of result columns written here */ + char **errmsg, /* Error msg written here */ + ... /* Arguments to the format string */ +){ + va_list ap; + int rc; + + va_start(ap, errmsg); + rc = sqlite_get_table_vprintf(db, sqlFormat, resultp, nrow, ncol, errmsg, ap); + va_end(ap); + return rc; +} +int sqlite_get_table_vprintf( + sqlite *db, /* An open database */ + const char *sqlFormat, /* printf-style format string for the SQL */ + char ***resultp, /* Result written to a char *[] that this points to */ + int *nrow, /* Number of result rows written here */ + int *ncolumn, /* Number of result columns written here */ + char **errmsg, /* Error msg written here */ + va_list ap /* Arguments to the format string */ +){ + char *zSql; + int rc; + + zSql = sqlite_vmprintf(sqlFormat, ap); + rc = sqlite_get_table(db, zSql, resultp, nrow, ncolumn, errmsg); + free(zSql); + return rc; +} |