fumiama/base16384
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add manpage

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源文雨
2022-04-27 12:47:31 +08:00
parent 230c2d3b2c
commit a768996479
3 changed files with 110 additions and 20 deletions
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43
base16384.c
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@@ -25,7 +25,7 @@ static off_t get_file_size(const char* filepath) {
char encbuf[BUFSIZ*1024/7*7];
char decbuf[BUFSIZ*1024/8*8+2];
void encode_file(const char* input, const char* output) {
static int encode_file(const char* input, const char* output) {
off_t inputsize;
FILE* fp = NULL;
FILE* fpo;
@@ -35,12 +35,12 @@ void encode_file(const char* input, const char* output) {
} else inputsize = get_file_size(input);
if(inputsize < 0) {
perror("Get file size error: ");
return;
return 1;
}
fpo = (*(uint16_t*)output == *(uint16_t*)"-")?stdout:fopen(output, "wb");
if(!fpo) {
perror("Fopen output file error: ");
return;
return 2;
}
if(!inputsize || inputsize > BUFSIZ*1024) { // stdin or big file, use encbuf & fread
inputsize = BUFSIZ*1024/7*7;
@@ -50,7 +50,7 @@ void encode_file(const char* input, const char* output) {
if(!fp) fp = fopen(input, "rb");
if(!fp) {
perror("Fopen input file error: ");
return;
return 3;
}
int outputsize = encode_len(inputsize)+16;
@@ -61,7 +61,7 @@ void encode_file(const char* input, const char* output) {
int n = encode(encbuf, cnt, decbuf, outputsize);
if(fwrite(decbuf, n, 1, fpo) <= 0) {
perror("Write file error: ");
return;
return 4;
}
}
/* 由操作系统负责释放资源
@@ -73,12 +73,12 @@ void encode_file(const char* input, const char* output) {
int fd = open(input, O_RDONLY);
if(fd <= 0) {
perror("Open input file error: ");
return;
return 5;
}
char *input_file = mmap(NULL, (size_t)inputsize, PROT_READ, MAP_PRIVATE, fd, 0);
if(input_file == MAP_FAILED) {
perror("Map input file error: ");
return;
return 6;
}
int outputsize = encode_len(inputsize)+16;
fputc(0xFE, fpo);
@@ -86,7 +86,7 @@ void encode_file(const char* input, const char* output) {
int n = encode(input_file, (int)inputsize, decbuf, outputsize);
if(fwrite(decbuf, n, 1, fpo) <= 0) {
perror("Write file error: ");
return;
return 7;
}
munmap(input_file, (size_t)inputsize);
/* 由操作系统负责释放资源
@@ -95,6 +95,7 @@ void encode_file(const char* input, const char* output) {
以缩短程序运行时间 */
}
#endif
return 0;
}
#define rm_head(fp) {\
@@ -112,7 +113,7 @@ static int is_next_end(FILE* fp) {
return 0;
}
void decode_file(const char* input, const char* output) {
static int decode_file(const char* input, const char* output) {
off_t inputsize;
FILE* fp = NULL;
FILE* fpo;
@@ -122,12 +123,12 @@ void decode_file(const char* input, const char* output) {
} else inputsize = get_file_size(input);
if(inputsize < 0) {
perror("Get file size error: ");
return;
return 1;
}
fpo = (*(uint16_t*)output == *(uint16_t*)"-")?stdout:fopen(output, "wb");
if(!fpo) {
perror("Fopen output file error: ");
return;
return 2;
}
if(!inputsize || inputsize > BUFSIZ*1024) { // stdin or big file, use decbuf & fread
inputsize = BUFSIZ*1024/8*8;
@@ -137,7 +138,7 @@ void decode_file(const char* input, const char* output) {
if(!fp) fp = fopen(input, "rb");
if(!fp) {
perror("Fopen input file error: ");
return;
return 3;
}
int outputsize = decode_len(inputsize, 0)+16;
int cnt = 0;
@@ -150,7 +151,7 @@ void decode_file(const char* input, const char* output) {
}
if(fwrite(encbuf, decode(decbuf, cnt, encbuf, outputsize), 1, fpo) <= 0) {
perror("Write file error: ");
return;
return 4;
}
}
/* 由操作系统负责释放资源
@@ -162,18 +163,18 @@ void decode_file(const char* input, const char* output) {
int fd = open(input, O_RDONLY);
if(fd <= 0) {
perror("Open input file error: ");
return;
return 5;
}
char *input_file = mmap(NULL, (size_t)inputsize, PROT_READ, MAP_PRIVATE, fd, 0);
if(input_file == MAP_FAILED) {
perror("Map input file error: ");
return;
return 6;
}
int outputsize = decode_len(inputsize, 0)+16;
int off = skip_offset(input_file);
if(fwrite(encbuf, decode(input_file+off, inputsize-off, encbuf, outputsize), 1, fpo) <= 0) {
perror("Write file error: ");
return;
return 7;
}
munmap(input_file, (size_t)inputsize);
/* 由操作系统负责释放资源
@@ -182,6 +183,7 @@ void decode_file(const char* input, const char* output) {
以缩短程序运行时间 */
}
#endif
return 0;
}
#ifndef _WIN32
@@ -206,17 +208,18 @@ int main(int argc, char** argv) {
#else
unsigned long t = get_start_ms();
#endif
int exitstat = 0;
switch(argv[1][1]) {
case 'e': encode_file(argv[2], argv[3]); break;
case 'd': decode_file(argv[2], argv[3]); break;
case 'e': exitstat = encode_file(argv[2], argv[3]); break;
case 'd': exitstat = decode_file(argv[2], argv[3]); break;
default: break;
}
if(*(uint16_t*)(argv[3]) != *(uint16_t*)"-") {
if(!exitstat && *(uint16_t*)(argv[3]) != *(uint16_t*)"-") {
#ifdef _WIN32
printf("spend time: %lums\n", clock() - t);
#else
printf("spend time: %lums\n", get_start_ms() - t);
#endif
}
return 0;
return exitstat;
}