| /* |
| ** 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 They are very out-of-date but might be useful as |
| ** an historical reference. Most of the "enhancements" have been backed |
| ** out so that the functionality is now the same as standard printf(). |
| ** |
| ************************************************************************** |
| ** |
| ** 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" |
| |
| /* |
| ** Conversion types fall into various categories as defined by the |
| ** following enumeration. |
| */ |
| #define etRADIX 1 /* Integer types. %d, %x, %o, and so forth */ |
| #define etFLOAT 2 /* Floating point. %f */ |
| #define etEXP 3 /* Exponentional notation. %e and %E */ |
| #define etGENERIC 4 /* Floating or exponential, depending on exponent. %g */ |
| #define etSIZE 5 /* Return number of characters processed so far. %n */ |
| #define etSTRING 6 /* Strings. %s */ |
| #define etDYNSTRING 7 /* Dynamically allocated strings. %z */ |
| #define etPERCENT 8 /* Percent symbol. %% */ |
| #define etCHARX 9 /* Characters. %c */ |
| #define etERROR 10 /* Used to indicate no such conversion type */ |
| /* The rest are extensions, not normally found in printf() */ |
| #define etCHARLIT 11 /* Literal characters. %' */ |
| #define etSQLESCAPE 12 /* Strings with '\'' doubled. %q */ |
| #define etSQLESCAPE2 13 /* Strings with '\'' doubled and enclosed in '', |
| NULL pointers replaced by SQL NULL. %Q */ |
| #define etTOKEN 14 /* a pointer to a Token structure */ |
| #define etSRCLIST 15 /* a pointer to a SrcList */ |
| |
| |
| /* |
| ** An "etByte" is an 8-bit unsigned value. |
| */ |
| typedef unsigned char etByte; |
| |
| /* |
| ** 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 */ |
| char fmttype; /* The format field code letter */ |
| etByte base; /* The base for radix conversion */ |
| etByte flags; /* One or more of FLAG_ constants below */ |
| etByte type; /* Conversion paradigm */ |
| char *charset; /* The character set for conversion */ |
| char *prefix; /* Prefix on non-zero values in alt format */ |
| } et_info; |
| |
| /* |
| ** Allowed values for et_info.flags |
| */ |
| #define FLAG_SIGNED 1 /* True if the value to convert is signed */ |
| #define FLAG_INTERN 2 /* True if for internal use only */ |
| |
| |
| /* |
| ** 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, 1, etRADIX, "0123456789", 0 }, |
| { 's', 0, 0, etSTRING, 0, 0 }, |
| { 'z', 0, 2, etDYNSTRING, 0, 0 }, |
| { 'q', 0, 0, etSQLESCAPE, 0, 0 }, |
| { 'Q', 0, 0, etSQLESCAPE2, 0, 0 }, |
| { 'c', 0, 0, etCHARX, 0, 0 }, |
| { 'o', 8, 0, etRADIX, "01234567", "0" }, |
| { 'u', 10, 0, etRADIX, "0123456789", 0 }, |
| { 'x', 16, 0, etRADIX, "0123456789abcdef", "x0" }, |
| { 'X', 16, 0, etRADIX, "0123456789ABCDEF", "X0" }, |
| { 'f', 0, 1, etFLOAT, 0, 0 }, |
| { 'e', 0, 1, etEXP, "e", 0 }, |
| { 'E', 0, 1, etEXP, "E", 0 }, |
| { 'g', 0, 1, etGENERIC, "e", 0 }, |
| { 'G', 0, 1, etGENERIC, "E", 0 }, |
| { 'i', 10, 1, etRADIX, "0123456789", 0 }, |
| { 'n', 0, 0, etSIZE, 0, 0 }, |
| { '%', 0, 0, etPERCENT, 0, 0 }, |
| { 'p', 10, 0, etRADIX, "0123456789", 0 }, |
| { 'T', 0, 2, etTOKEN, 0, 0 }, |
| { 'S', 0, 2, etSRCLIST, 0, 0 }, |
| }; |
| #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(LONGDOUBLE_TYPE *val, int *cnt){ |
| int digit; |
| LONGDOUBLE_TYPE 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*,const char*,int), /* Consumer of text */ |
| void *arg, /* First argument to the consumer */ |
| int useExtended, /* Allow extended %-conversions */ |
| const char *fmt, /* Format string */ |
| va_list ap /* arguments */ |
| ){ |
| int c; /* Next character in the format string */ |
| char *bufpt; /* Pointer to the conversion buffer */ |
| int precision; /* Precision of the current field */ |
| int length; /* Length of the field */ |
| int idx; /* A general purpose loop counter */ |
| int count; /* Total number of characters output */ |
| int width; /* Width of the current field */ |
| etByte flag_leftjustify; /* True if "-" flag is present */ |
| etByte flag_plussign; /* True if "+" flag is present */ |
| etByte flag_blanksign; /* True if " " flag is present */ |
| etByte flag_alternateform; /* True if "#" flag is present */ |
| etByte flag_zeropad; /* True if field width constant starts with zero */ |
| etByte flag_long; /* True if "l" flag is present */ |
| unsigned long longvalue; /* Value for integer types */ |
| LONGDOUBLE_TYPE 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'. */ |
| etByte errorflag = 0; /* True if an error is encountered */ |
| etByte 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 */ |
| etByte flag_dp; /* True if decimal point should be shown */ |
| etByte flag_rtz; /* True if trailing zeros should be removed */ |
| etByte flag_exp; /* True to force display of the exponent */ |
| int nsd; /* Number of significant digits returned */ |
| #endif |
| |
| func(arg,"",0); |
| count = length = 0; |
| bufpt = 0; |
| for(; (c=(*fmt))!=0; ++fmt){ |
| if( c!='%' ){ |
| 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 = 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; |
| default: break; |
| } |
| }while( c==0 && (c=(*++fmt))!=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); |
| if( precision<0 ) precision = -precision; |
| 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; |
| xtype = etERROR; |
| for(idx=0; idx<etNINFO; idx++){ |
| if( c==fmtinfo[idx].fmttype ){ |
| infop = &fmtinfo[idx]; |
| if( useExtended || (infop->flags & FLAG_INTERN)==0 ){ |
| xtype = infop->type; |
| } |
| break; |
| } |
| } |
| 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 etRADIX: |
| if( flag_long ) longvalue = va_arg(ap,long); |
| else longvalue = va_arg(ap,int); |
| #if 1 |
| /* 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->flags & 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-1]; |
| { |
| 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 = &buf[etBUFSIZE-1]-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 = &buf[etBUFSIZE-1]-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; |
| #if 0 |
| /* 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 ){ |
| while( realvalue>=1e8 && exp<=350 ){ realvalue *= 1e-8; exp+=8; } |
| while( realvalue>=10.0 && exp<=350 ){ realvalue *= 0.1; exp++; } |
| while( realvalue<1e-8 && exp>=-350 ){ realvalue *= 1e8; exp-=8; } |
| while( realvalue<1.0 && exp>=-350 ){ realvalue *= 10.0; exp--; } |
| if( exp>350 || exp<-350 ){ |
| 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 = bufpt-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: |
| case etDYNSTRING: |
| bufpt = va_arg(ap,char*); |
| if( bufpt==0 ){ |
| bufpt = ""; |
| }else if( xtype==etDYNSTRING ){ |
| zExtra = bufpt; |
| } |
| 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 etTOKEN: { |
| Token *pToken = va_arg(ap, Token*); |
| (*func)(arg, pToken->z, pToken->n); |
| length = width = 0; |
| break; |
| } |
| case etSRCLIST: { |
| SrcList *pSrc = va_arg(ap, SrcList*); |
| int k = va_arg(ap, int); |
| struct SrcList_item *pItem = &pSrc->a[k]; |
| assert( k>=0 && k<pSrc->nSrc ); |
| if( pItem->zDatabase && pItem->zDatabase[0] ){ |
| (*func)(arg, pItem->zDatabase, strlen(pItem->zDatabase)); |
| (*func)(arg, ".", 1); |
| } |
| (*func)(arg, pItem->zName, strlen(pItem->zName)); |
| length = width = 0; |
| 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 ){ |
| 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 nTotal; /* Output size if unconstrained */ |
| int nAlloc; /* Amount of space allocated in zText */ |
| void *(*xRealloc)(void*,int); /* Function used to realloc memory */ |
| }; |
| |
| /* |
| ** 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, const char *zNewText, int nNewChar){ |
| struct sgMprintf *pM = (struct sgMprintf*)arg; |
| pM->nTotal += nNewChar; |
| if( pM->nChar + nNewChar + 1 > pM->nAlloc ){ |
| if( pM->xRealloc==0 ){ |
| nNewChar = pM->nAlloc - pM->nChar - 1; |
| }else{ |
| pM->nAlloc = pM->nChar + nNewChar*2 + 1; |
| if( pM->zText==pM->zBase ){ |
| pM->zText = pM->xRealloc(0, pM->nAlloc); |
| if( pM->zText && pM->nChar ){ |
| memcpy(pM->zText, pM->zBase, pM->nChar); |
| } |
| }else{ |
| pM->zText = pM->xRealloc(pM->zText, pM->nAlloc); |
| } |
| } |
| } |
| if( pM->zText ){ |
| if( nNewChar>0 ){ |
| memcpy(&pM->zText[pM->nChar], zNewText, nNewChar); |
| pM->nChar += nNewChar; |
| } |
| pM->zText[pM->nChar] = 0; |
| } |
| } |
| |
| /* |
| ** This routine is a wrapper around xprintf() that invokes mout() as |
| ** the consumer. |
| */ |
| static char *base_vprintf( |
| void *(*xRealloc)(void*,int), /* Routine to realloc memory. May be NULL */ |
| int useInternal, /* Use internal %-conversions if true */ |
| char *zInitBuf, /* Initially write here, before mallocing */ |
| int nInitBuf, /* Size of zInitBuf[] */ |
| const char *zFormat, /* format string */ |
| va_list ap /* arguments */ |
| ){ |
| struct sgMprintf sM; |
| sM.zBase = sM.zText = zInitBuf; |
| sM.nChar = sM.nTotal = 0; |
| sM.nAlloc = nInitBuf; |
| sM.xRealloc = xRealloc; |
| vxprintf(mout, &sM, useInternal, zFormat, ap); |
| if( xRealloc ){ |
| if( sM.zText==sM.zBase ){ |
| sM.zText = xRealloc(0, sM.nChar+1); |
| memcpy(sM.zText, sM.zBase, sM.nChar+1); |
| }else if( sM.nAlloc>sM.nChar+10 ){ |
| sM.zText = xRealloc(sM.zText, sM.nChar+1); |
| } |
| } |
| return sM.zText; |
| } |
| |
| /* |
| ** Realloc that is a real function, not a macro. |
| */ |
| static void *printf_realloc(void *old, int size){ |
| return sqliteRealloc(old,size); |
| } |
| |
| /* |
| ** Print into memory obtained from sqliteMalloc(). Use the internal |
| ** %-conversion extensions. |
| */ |
| char *sqliteVMPrintf(const char *zFormat, va_list ap){ |
| char zBase[1000]; |
| return base_vprintf(printf_realloc, 1, zBase, sizeof(zBase), zFormat, ap); |
| } |
| |
| /* |
| ** Print into memory obtained from sqliteMalloc(). Use the internal |
| ** %-conversion extensions. |
| */ |
| char *sqliteMPrintf(const char *zFormat, ...){ |
| va_list ap; |
| char *z; |
| char zBase[1000]; |
| va_start(ap, zFormat); |
| z = base_vprintf(printf_realloc, 1, zBase, sizeof(zBase), zFormat, ap); |
| va_end(ap); |
| return z; |
| } |
| |
| /* |
| ** Print into memory obtained from malloc(). Do not use the internal |
| ** %-conversion extensions. This routine is for use by external users. |
| */ |
| char *sqlite_mprintf(const char *zFormat, ...){ |
| va_list ap; |
| char *z; |
| char zBuf[200]; |
| |
| va_start(ap,zFormat); |
| z = base_vprintf((void*(*)(void*,int))realloc, 0, |
| zBuf, sizeof(zBuf), zFormat, ap); |
| va_end(ap); |
| return z; |
| } |
| |
| /* This is the varargs version of sqlite_mprintf. |
| */ |
| char *sqlite_vmprintf(const char *zFormat, va_list ap){ |
| char zBuf[200]; |
| return base_vprintf((void*(*)(void*,int))realloc, 0, |
| zBuf, sizeof(zBuf), zFormat, ap); |
| } |
| |
| /* |
| ** sqlite_snprintf() works like snprintf() except that it ignores the |
| ** current locale settings. This is important for SQLite because we |
| ** are not able to use a "," as the decimal point in place of "." as |
| ** specified by some locales. |
| */ |
| char *sqlite_snprintf(int n, char *zBuf, const char *zFormat, ...){ |
| char *z; |
| va_list ap; |
| |
| va_start(ap,zFormat); |
| z = base_vprintf(0, 0, zBuf, n, zFormat, ap); |
| va_end(ap); |
| return z; |
| } |
| |
| /* |
| ** 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; |
| } |
