diff options
Diffstat (limited to 'libavutil/integer.c')
| -rw-r--r-- | libavutil/integer.c | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/libavutil/integer.c b/libavutil/integer.c index 38a826f861..b0e766f781 100644 --- a/libavutil/integer.c +++ b/libavutil/integer.c @@ -17,7 +17,7 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ - + /** * @file integer.c * arbitrary precision integers. @@ -29,7 +29,7 @@ AVInteger av_add_i(AVInteger a, AVInteger b){ int i, carry=0; - + for(i=0; i<AV_INTEGER_SIZE; i++){ carry= (carry>>16) + a.v[i] + b.v[i]; a.v[i]= carry; @@ -39,7 +39,7 @@ AVInteger av_add_i(AVInteger a, AVInteger b){ AVInteger av_sub_i(AVInteger a, AVInteger b){ int i, carry=0; - + for(i=0; i<AV_INTEGER_SIZE; i++){ carry= (carry>>16) + a.v[i] - b.v[i]; a.v[i]= carry; @@ -66,12 +66,12 @@ AVInteger av_mul_i(AVInteger a, AVInteger b){ int i, j; int na= (av_log2_i(a)+16) >> 4; int nb= (av_log2_i(b)+16) >> 4; - + memset(&out, 0, sizeof(out)); - + for(i=0; i<na; i++){ unsigned int carry=0; - + if(a.v[i]) for(j=i; j<AV_INTEGER_SIZE && j-i<=nb; j++){ carry= (carry>>16) + out.v[j] + a.v[i]*b.v[j-i]; @@ -86,10 +86,10 @@ AVInteger av_mul_i(AVInteger a, AVInteger b){ * returns 0 if a==b, 1 if a>b and -1 if a<b. */ int av_cmp_i(AVInteger a, AVInteger b){ - int i; + int i; int v= (int16_t)a.v[AV_INTEGER_SIZE-1] - (int16_t)b.v[AV_INTEGER_SIZE-1]; if(v) return (v>>16)|1; - + for(i=AV_INTEGER_SIZE-2; i>=0; i--){ int v= a.v[i] - b.v[i]; if(v) return (v>>16)|1; @@ -123,13 +123,13 @@ AVInteger av_mod_i(AVInteger *quot, AVInteger a, AVInteger b){ int i= av_log2_i(a) - av_log2_i(b); AVInteger quot_temp; if(!quot) quot = "_temp; - + assert((int16_t)a[AV_INTEGER_SIZE-1] >= 0 && (int16_t)b[AV_INTEGER_SIZE-1] >= 0); assert(av_log2(b)>=0); - + if(i > 0) b= av_shr_i(b, -i); - + memset(quot, 0, sizeof(AVInteger)); while(i-- >= 0){ @@ -158,7 +158,7 @@ AVInteger av_div_i(AVInteger a, AVInteger b){ AVInteger av_int2i(int64_t a){ AVInteger out; int i; - + for(i=0; i<AV_INTEGER_SIZE; i++){ out.v[i]= a; a>>=16; @@ -168,13 +168,13 @@ AVInteger av_int2i(int64_t a){ /** * converts the given AVInteger to an int64_t. - * if the AVInteger is too large to fit into an int64_t, + * if the AVInteger is too large to fit into an int64_t, * then only the least significant 64bit will be used */ int64_t av_i2int(AVInteger a){ int i; int64_t out=(int8_t)a.v[AV_INTEGER_SIZE-1]; - + for(i= AV_INTEGER_SIZE-2; i>=0; i--){ out = (out<<16) + a.v[i]; } @@ -203,7 +203,7 @@ main(){ for(b=3; b<256*256*256; b+=27118){ AVInteger ai= av_int2i(a); AVInteger bi= av_int2i(b); - + assert(av_i2int(ai) == a); assert(av_i2int(bi) == b); assert(av_i2int(av_add_i(ai,bi)) == a+b); |