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Update base16384.h

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修复文件结尾时有可能多出字符的问题。
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源文雨
2020-04-16 16:38:50 +08:00
committed by GitHub
parent 6a4ae9bc6f
commit daf8bbcc87
1 changed files with 24 additions and 8 deletions
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32
base16384.h
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@@ -10,6 +10,15 @@ void push(int istrue, FILE *fpo, int offset){
pushbit(&outbuf, istrue);
}
}
#define setoffset(x, offset){\
char flag = 0;\
ch1 = ch2 = x;\
while(!feof(fp) && (ch1 = fgetc(fp)) == x && (ch2 = fgetc(fp)) == x) {cnt8 -= offset; flag++;}\
if(ch2 != x) {ungetc(ch2, fp); ch2 = x;}\
if(ch1 != x) {ungetc(ch1, fp); ch1 = x;}\
while(feof(fp) && buf[cnt - 1] == x && buf[cnt - 2] == x) {cnt8 -= offset; cnt -= 2; flag++;}\
if(flag) cnt8 -= 8;\
}
void encode(FILE *fp, FILE *fpo){
int cnt = 0;
@@ -28,19 +37,26 @@ void encode(FILE *fp, FILE *fpo){
outbuf.b[outbuf.p / 8] &= ~(255u >> outbuf.p % 8);
for(int i = 0; i < outbuf.p / 8 + 1; i += 2) outbuf.b[i] += HEAD;
fwrite(outbuf.b, sizeof(char), (outbuf.p % 8)?outbuf.p / 8 + 1:outbuf.p / 8 , fpo);
if(((outbuf.p % 8)?outbuf.p / 8 + 1:outbuf.p / 8) % 2) fputc(0, fpo);
if(((outbuf.p % 8)?outbuf.p / 8 + 1:outbuf.p / 8) % 2){
fputc(0, fpo);
fputc('>', fpo);
fputc('>', fpo);
}
for(int i = 0; i < outbuf.p % 8; i++) fputc('=', fpo);
}
}
void decode(FILE *fp, FILE *fpo){
int cnt = 0;
char ch = '=';
int cnt8 = 0;
int tc = 0;
char ch1;
char ch2;
while((cnt = fread(buf, sizeof(char), BUFSIZ, fp))){
int cnt8 = cnt * 8;
while(!feof(fp) && (ch = fgetc(fp)) == '=') cnt8 -= 7;
if(ch != '=') {ungetc(ch, fp); ch = '=';}
while(feof(fp) && buf[cnt - 1] == '=' && buf[cnt - 2] == '=') {cnt8 -= 7; cnt -= 2;}
if(cnt8 % 8) cnt8 -= 8;
cnt8 = cnt * 8;
tc = cnt;
setoffset('=', 14)
setoffset('>', 16)
for(int i = ((buf[0] == 0xFE)?16:0); i < cnt8; i++){
if(!(i % 16)){
buf[i / 8] -= HEAD;
@@ -49,5 +65,5 @@ void decode(FILE *fp, FILE *fpo){
push(buf[i / 8] & (128u >> (i % 8)), fpo, 0);
}
}
if(outbuf.p) fwrite(outbuf.b, sizeof(char), outbuf.p / 8 + ((outbuf.p % 8)?1:0), fpo);
if(outbuf.p) fwrite(outbuf.b, sizeof(char), (outbuf.p % 8)?outbuf.p / 8 + 1:outbuf.p / 8, fpo);
}