jsprf.c

Swfdec still is development software, but has also followed a rigid no-crashes-allowed policy. I b

    cn = 0;
    while( cn < number ){
        if( nas[cn].type == TYPE_UNKNOWN ){
            cn++;
            continue;
        }

        VARARGS_ASSIGN(nas[cn].ap, ap);

        switch( nas[cn].type ){
        case TYPE_INT16:
        case TYPE_UINT16:
        case TYPE_INTN:
        case TYPE_UINTN:                (void)va_arg( ap, JSIntn );             break;

        case TYPE_INT32:                (void)va_arg( ap, JSInt32 );            break;

        case TYPE_UINT32:       (void)va_arg( ap, JSUint32 );   break;

        case TYPE_INT64:        (void)va_arg( ap, JSInt64 );            break;

        case TYPE_UINT64:       (void)va_arg( ap, JSUint64 );           break;

        case TYPE_STRING:       (void)va_arg( ap, char* );              break;

        case TYPE_INTSTR:       (void)va_arg( ap, JSIntn* );            break;

        case TYPE_DOUBLE:       (void)va_arg( ap, double );             break;

        default:
            if( nas != nasArray )
                free( nas );
            *rv = -1;
            return NULL;
        }

        cn++;
    }


    return nas;
}

/*
** The workhorse sprintf code.
*/
static int dosprintf(SprintfState *ss, const char *fmt, va_list ap)
{
    char c;
    int flags, width, prec, radix, type;
    union {
        char ch;
        int i;
        long l;
        JSInt64 ll;
        double d;
        const char *s;
        int *ip;
    } u;
    const char *fmt0;
    static char *hex = "0123456789abcdef";
    static char *HEX = "0123456789ABCDEF";
    char *hexp;
    int rv, i;
    struct NumArgState *nas = NULL;
    struct NumArgState nasArray[ NAS_DEFAULT_NUM ];
    char pattern[20];
    const char *dolPt = NULL;  /* in "%4$.2f", dolPt will poiont to . */


    /*
    ** build an argument array, IF the fmt is numbered argument
    ** list style, to contain the Numbered Argument list pointers
    */

    nas = BuildArgArray( fmt, ap, &rv, nasArray );
    if( rv < 0 ){
        /* the fmt contains error Numbered Argument format, [e-mail] */
        JS_ASSERT(0);
        return rv;
    }

    while ((c = *fmt++) != 0) {
        if (c != '%') {
            rv = (*ss->stuff)(ss, fmt - 1, 1);
            if (rv < 0) {
                return rv;
            }
            continue;
        }
        fmt0 = fmt - 1;

        /*
        ** Gobble up the % format string. Hopefully we have handled all
        ** of the strange cases!
        */
        flags = 0;
        c = *fmt++;
        if (c == '%') {
            /* quoting a % with %% */
            rv = (*ss->stuff)(ss, fmt - 1, 1);
            if (rv < 0) {
                return rv;
            }
            continue;
        }

        if( nas != NULL ){
            /* the fmt contains the Numbered Arguments feature */
            i = 0;
            while( c && c != '$' ){         /* should imporve error check later */
                i = ( i * 10 ) + ( c - '0' );
                c = *fmt++;
            }

            if( nas[i-1].type == TYPE_UNKNOWN ){
                if( nas && ( nas != nasArray ) )
                    free( nas );
                return -1;
            }

            ap = nas[i-1].ap;
            dolPt = fmt;
            c = *fmt++;
        }

        /*
         * Examine optional flags.  Note that we do not implement the
         * '#' flag of sprintf().  The ANSI C spec. of the '#' flag is
         * somewhat ambiguous and not ideal, which is perhaps why
         * the various sprintf() implementations are inconsistent
         * on this feature.
         */
        while ((c == '-') || (c == '+') || (c == ' ') || (c == '0')) {
            if (c == '-') flags |= FLAG_LEFT;
            if (c == '+') flags |= FLAG_SIGNED;
            if (c == ' ') flags |= FLAG_SPACED;
            if (c == '0') flags |= FLAG_ZEROS;
            c = *fmt++;
        }
        if (flags & FLAG_SIGNED) flags &= ~FLAG_SPACED;
        if (flags & FLAG_LEFT) flags &= ~FLAG_ZEROS;

        /* width */
        if (c == '*') {
            c = *fmt++;
            width = va_arg(ap, int);
        } else {
            width = 0;
            while ((c >= '0') && (c <= '9')) {
                width = (width * 10) + (c - '0');
                c = *fmt++;
            }
        }

        /* precision */
        prec = -1;
        if (c == '.') {
            c = *fmt++;
            if (c == '*') {
                c = *fmt++;
                prec = va_arg(ap, int);
            } else {
                prec = 0;
                while ((c >= '0') && (c <= '9')) {
                    prec = (prec * 10) + (c - '0');
                    c = *fmt++;
                }
            }
        }

        /* size */
        type = TYPE_INTN;
        if (c == 'h') {
            type = TYPE_INT16;
            c = *fmt++;
        } else if (c == 'L') {
            /* XXX not quite sure here */
            type = TYPE_INT64;
            c = *fmt++;
        } else if (c == 'l') {
            type = TYPE_INT32;
            c = *fmt++;
            if (c == 'l') {
                type = TYPE_INT64;
                c = *fmt++;
            }
        }

        /* format */
        hexp = hex;
        switch (c) {
          case 'd': case 'i':                   /* decimal/integer */
            radix = 10;
            goto fetch_and_convert;

          case 'o':                             /* octal */
            radix = 8;
            type |= 1;
            goto fetch_and_convert;

          case 'u':                             /* unsigned decimal */
            radix = 10;
            type |= 1;
            goto fetch_and_convert;

          case 'x':                             /* unsigned hex */
            radix = 16;
            type |= 1;
            goto fetch_and_convert;

          case 'X':                             /* unsigned HEX */
            radix = 16;
            hexp = HEX;
            type |= 1;
            goto fetch_and_convert;

          fetch_and_convert:
            switch (type) {
              case TYPE_INT16:
                u.l = va_arg(ap, int);
                if (u.l < 0) {
                    u.l = -u.l;
                    flags |= FLAG_NEG;
                }
                goto do_long;
              case TYPE_UINT16:
                u.l = va_arg(ap, int) & 0xffff;
                goto do_long;
              case TYPE_INTN:
                u.l = va_arg(ap, int);
                if (u.l < 0) {
                    u.l = -u.l;
                    flags |= FLAG_NEG;
                }
                goto do_long;
              case TYPE_UINTN:
                u.l = (long)va_arg(ap, unsigned int);
                goto do_long;

              case TYPE_INT32:
                u.l = va_arg(ap, JSInt32);
                if (u.l < 0) {
                    u.l = -u.l;
                    flags |= FLAG_NEG;
                }
                goto do_long;
              case TYPE_UINT32:
                u.l = (long)va_arg(ap, JSUint32);
              do_long:
                rv = cvt_l(ss, u.l, width, prec, radix, type, flags, hexp);
                if (rv < 0) {
                    return rv;
                }
                break;

              case TYPE_INT64:
                u.ll = va_arg(ap, JSInt64);
                if (!JSLL_GE_ZERO(u.ll)) {
                    JSLL_NEG(u.ll, u.ll);
                    flags |= FLAG_NEG;
                }
                goto do_longlong;
              case TYPE_UINT64:
                u.ll = va_arg(ap, JSUint64);
              do_longlong:
                rv = cvt_ll(ss, u.ll, width, prec, radix, type, flags, hexp);
                if (rv < 0) {
                    return rv;
                }
                break;
            }
            break;

          case 'e':
          case 'E':
          case 'f':
          case 'g':
            u.d = va_arg(ap, double);
            if( nas != NULL ){
                i = fmt - dolPt;
                if( i < (int)sizeof( pattern ) ){
                    pattern[0] = '%';
                    memcpy( &pattern[1], dolPt, (size_t)i );
                    rv = cvt_f(ss, u.d, pattern, &pattern[i+1] );
                }
            } else
                rv = cvt_f(ss, u.d, fmt0, fmt);

            if (rv < 0) {
                return rv;
            }
            break;

          case 'c':
            u.ch = va_arg(ap, int);
            if ((flags & FLAG_LEFT) == 0) {
                while (width-- > 1) {
                    rv = (*ss->stuff)(ss, " ", 1);
                    if (rv < 0) {
                        return rv;
                    }
                }
            }
            rv = (*ss->stuff)(ss, &u.ch, 1);
            if (rv < 0) {
                return rv;
            }
            if (flags & FLAG_LEFT) {
                while (width-- > 1) {
                    rv = (*ss->stuff)(ss, " ", 1);
                    if (rv < 0) {
                        return rv;
                    }
                }
            }
            break;

          case 'p':
            if (sizeof(void *) == sizeof(JSInt32)) {
                type = TYPE_UINT32;
            } else if (sizeof(void *) == sizeof(JSInt64)) {
                type = TYPE_UINT64;
            } else if (sizeof(void *) == sizeof(int)) {
                type = TYPE_UINTN;
            } else {
                JS_ASSERT(0);
                break;
            }
            radix = 16;
            goto fetch_and_convert;

#if 0
          case 'C':
          case 'S':
          case 'E':
          case 'G':
            /* XXX not supported I suppose */
            JS_ASSERT(0);
            break;
#endif

          case 's':
            u.s = va_arg(ap, const char*);
            rv = cvt_s(ss, u.s, width, prec, flags);
            if (rv < 0) {
                return rv;
            }
            break;

          case 'n':
            u.ip = va_arg(ap, int*);
            if (u.ip) {
                *u.ip = ss->cur - ss->base;
            }
            break;

          default:
            /* Not a % token after all... skip it */
#if 0
            JS_ASSERT(0);
#endif
            rv = (*ss->stuff)(ss, "%", 1);
            if (rv < 0) {
                return rv;
            }
            rv = (*ss->stuff)(ss, fmt - 1, 1);
            if (rv < 0) {
                return rv;
            }
        }
    }

    /* Stuff trailing NUL */
    rv = (*ss->stuff)(ss, "\0", 1);

    if( nas && ( nas != nasArray ) ){
        free( nas );
    }

    return rv;
}

/************************************************************************/

static int FuncStuff(SprintfState *ss, const char *sp, JSUint32 len)
{
    int rv;

    rv = (*ss->func)(ss->arg, sp, len);
    if (rv < 0) {
        return rv;
    }
    ss->maxlen += len;
    return 0;
}

JS_PUBLIC_API(JSUint32) JS_sxprintf(JSStuffFunc func, void *arg,
                                    const char *fmt, ...)
{
    va_list ap;
    int rv;

    va_start(ap, fmt);
    rv = JS_vsxprintf(func, arg, fmt, ap);
    va_end(ap);
    return rv;
}

JS_PUBLIC_API(JSUint32) JS_vsxprintf(JSStuffFunc func, void *arg,
                                     const char *fmt, va_list ap)
{
    SprintfState ss;
    int rv;

    ss.stuff = FuncStuff;
    ss.func = func;
    ss.arg = arg;
    ss.maxlen = 0;
    rv = dosprintf(&ss, fmt, ap);
    return (rv < 0) ? (JSUint32)-1 : ss.maxlen;
}

/*
** Stuff routine that automatically grows the malloc'd output buffer
** before it overflows.
*/
static int GrowStuff(SprintfState *ss, const char *sp, JSUint32 len)
{
    ptrdiff_t off;
    char *newbase;
    JSUint32 newlen;

    off = ss->cur - ss->base;
    if (off + len >= ss->maxlen) {
        /* Grow the buffer */
        newlen = ss->maxlen + ((len > 32) ? len : 32);
        if (ss->base) {
            newbase = (char*) realloc(ss->base, newlen);
        } else {
            newbase = (char*) malloc(newlen);
        }
        if (!newbase) {
            /* Ran out of memory */
            return -1;
        }
        ss->base = newbase;
        ss->maxlen = newlen;
        ss->cur = ss->base + off;
    }

    /* Copy data */
    while (len) {
        --len;
        *ss->cur++ = *sp++;
    }
    JS_ASSERT((JSUint32)(ss->cur - ss->base) <= ss->maxlen);
    return 0;
}

/*
** sprintf into a malloc'd buffer
*/
JS_PUBLIC_API(char *) JS_smprintf(const char *fmt, ...)
{
    va_list ap;
    char *rv;

    va_start(ap, fmt);
    rv = JS_vsmprintf(fmt, ap);
    va_end(ap);
    return rv;
}

/*
** Free memory allocated, for the caller, by JS_smprintf
*/
JS_PUBLIC_API(void) JS_smprintf_free(char *mem)
{
        free(mem);
}

JS_PUBLIC_API(char *) JS_vsmprintf(const char *fmt, va_list ap)
{
    SprintfState ss;
    int rv;

    ss.stuff = GrowStuff;
    ss.base = 0;
    ss.cur = 0;
    ss.maxlen = 0;
    rv = dosprintf(&ss, fmt, ap);
    if (rv < 0) {
        if (ss.base) {
            free(ss.base);
        }
        return 0;
    }
    return ss.base;
}

/*
** Stuff routine that discards overflow data
*/
static int LimitStuff(SprintfState *ss, const char *sp, JSUint32 len)
{
    JSUint32 limit = ss->maxlen - (ss->cur - ss->base);

    if (len > limit) {
        len = limit;
    }
    while (len) {
        --len;
        *ss->cur++ = *sp++;
    }
    return 0;
}

/*
** sprintf into a fixed size buffer. Make sure there is a NUL at the end
** when finished.
*/
JS_PUBLIC_API(JSUint32) JS_snprintf(char *out, JSUint32 outlen, const char *fmt, ...)
{
    va_list ap;
    int rv;

    JS_ASSERT((JSInt32)outlen > 0);
    if ((JSInt32)outlen <= 0) {
        return 0;
    }

    va_start(ap, fmt);
    rv = JS_vsnprintf(out, outlen, fmt, ap);
    va_end(ap);
    return rv;
}

JS_PUBLIC_API(JSUint32) JS_vsnprintf(char *out, JSUint32 outlen,const char *fmt,
                                  va_list ap)
{
    SprintfState ss;
    JSUint32 n;

    JS_ASSERT((JSInt32)outlen > 0);
    if ((JSInt32)outlen <= 0) {
        return 0;
    }

    ss.stuff = LimitStuff;
    ss.base = out;
    ss.cur = out;
    ss.maxlen = outlen;
    (void) dosprintf(&ss, fmt, ap);

    /* If we added chars, and we didn't append a null, do it now. */
    if( (ss.cur != ss.base) && (*(ss.cur - 1) != '\0') )
        *(--ss.cur) = '\0';

    n = ss.cur - ss.base;
    return n ? n - 1 : n;
}

JS_PUBLIC_API(char *) JS_sprintf_append(char *last, const char *fmt, ...)
{
    va_list ap;
    char *rv;

    va_start(ap, fmt);
    rv = JS_vsprintf_append(last, fmt, ap);
    va_end(ap);
    return rv;
}

JS_PUBLIC_API(char *) JS_vsprintf_append(char *last, const char *fmt, va_list ap)
{
    SprintfState ss;
    int rv;

    ss.stuff = GrowStuff;
    if (last) {
        int lastlen = strlen(last);
        ss.base = last;
        ss.cur = last + lastlen;
        ss.maxlen = lastlen;
    } else {
        ss.base = 0;
        ss.cur = 0;
        ss.maxlen = 0;
    }
    rv = dosprintf(&ss, fmt, ap);
    if (rv < 0) {
        if (ss.base) {
            free(ss.base);
        }
        return 0;
    }
    return ss.base;
}