fumiama/base16384
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backport: commandline support on stdin/stdout

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源文雨
2024-04-06 14:57:34 +09:00
parent b416eeaf45
commit b861078dec
1 changed files with 34 additions and 13 deletions
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47
base16384.c
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@@ -5,10 +5,10 @@
#include "bitio.h" #include "bitio.h"
#define HEAD 0x4E #define HEAD 0x4E
BIT outbuf; static BIT outbuf;
unsigned char buf[BUFSIZ/8*8+2]; static unsigned char buf[BUFSIZ/8*8+2];
static void push(int istrue, FILE *fpo, int offset){ static inline void push(int istrue, FILE *fpo, int offset){
if(!~pushbit(&outbuf, istrue)){ if(!~pushbit(&outbuf, istrue)){
if(offset) for(int i = 0; i < BITBUFSIZE; i += 2) outbuf.b[i] += offset; if(offset) for(int i = 0; i < BITBUFSIZE; i += 2) outbuf.b[i] += offset;
fwrite(outbuf.b, sizeof(char), BITBUFSIZE, fpo); fwrite(outbuf.b, sizeof(char), BITBUFSIZE, fpo);
@@ -70,30 +70,51 @@ static void decode(FILE *fp, FILE *fpo){
} }
#define CHOICE argv[1][1] #define CHOICE argv[1][1]
#define READ argv[2] #define INPUT argv[2]
#define WRITE argv[3] #define OUTPUT argv[3]
#define is_standard_io(filename) (*(uint16_t*)(filename) == *(uint16_t*)"-")
int main(int argc, char **argv){ int main(int argc, char **argv){
FILE *fp = NULL; FILE *fp = NULL;
FILE *fpo = NULL; FILE *fpo = NULL;
if(argc != 4){ if(argc != 4){
fputs("Usage: -[e|d] inputfile outputfile\n", stderr); fputs("base16384 [-ed] [inputfile] [outputfile]\n", stderr);
fputs(" -e encode\n", stderr); fputs(" -e\t\tencode (default)\n", stderr);
fputs(" -d decode\n", stderr); fputs(" -d\t\tdecode\n", stderr);
fputs(" inputfile\tpass - to read from stdin\n", stderr);
fputs(" outputfile\tpass - to write to stdout\n", stderr);
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
fp = fopen(READ, "rb"); if(is_standard_io(INPUT)) {
fpo = fopen(WRITE, "wb"); fp = stdin;
if(!fp || !fpo){ } else {
fputs("IO error!", stderr); fp = fopen(INPUT, "rb");
exit(EXIT_FAILURE); if(!fp){
perror("fopen");
exit(EXIT_FAILURE);
}
} }
if(is_standard_io(OUTPUT)) {
fpo = stdout;
} else {
fpo = fopen(OUTPUT, "wb");
if(!fpo){
perror("fopen");
exit(EXIT_FAILURE);
}
}
switch(CHOICE){ switch(CHOICE){
case 'e': encode(fp, fpo); break; case 'e': encode(fp, fpo); break;
case 'd': decode(fp, fpo); break; case 'd': decode(fp, fpo); break;
default: break; default: break;
} }
if(is_standard_io(INPUT)) fclose(fp);
if(is_standard_io(OUTPUT)) fclose(fpo);
return 0; return 0;
} }