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new hexdump fmt and scan routines for textcode

master
Felix von Leitner 20 years ago
parent
commit
2fb545ac2d
  1. 2
      textcode.h
  2. 19
      textcode/fmt_hexdump.c
  3. 27
      textcode/scan_hexdump.c

2
textcode.h

@ -8,6 +8,7 @@ unsigned int fmt_base64(char* dest,const char* src,unsigned int len);
unsigned int fmt_quotedprintable(char* dest,const char* src,unsigned int len);
unsigned int fmt_urlencoded(char* dest,const char* src,unsigned int len);
unsigned int fmt_yenc(char* dest,const char* src,unsigned int len);
unsigned int fmt_hexdump(char* dest,const char* src,unsigned int len);
/* These read one line from src, decoded it, and write the result to
* dest. The number of decoded bytes is written to destlen. dest
@ -17,6 +18,7 @@ unsigned int scan_base64(const char *src,char *dest,unsigned int *destlen);
unsigned int scan_quotedprintable(const char *src,char *dest,unsigned int *destlen);
unsigned int scan_urlencoded(const char *src,char *dest,unsigned int *destlen);
unsigned int scan_yenc(const char *src,char *dest,unsigned int *destlen);
unsigned int scan_hexdump(const char *src,char *dest,unsigned int *destlen);
extern const char base64[64];

19
textcode/fmt_hexdump.c

@ -0,0 +1,19 @@
#include "fmt.h"
#include "textcode.h"
#include "str.h"
#include "haveinline.h"
static inline int tohex(char c) {
return c>9?c-10+'A':c+'0';
}
unsigned int fmt_hexdump(char* dest,const char* src,unsigned int len) {
register const unsigned char* s=(const unsigned char*) src;
unsigned long written=0,i;
for (i=0; i<len; ++i) {
dest[written]=tohex(s[i]>>4);
dest[written+1]=tohex(s[i]&15);
written+=2;
}
return written;
}

27
textcode/scan_hexdump.c

@ -0,0 +1,27 @@
#include "fmt.h"
#include "textcode.h"
#include "haveinline.h"
static inline int fromhex(char c) {
if (c>='0' && c<='9') return c-'0';
if (c>='A' && c<='F') return c-'A'+10;
if (c>='a' && c<='f') return c-'a'+10;
return -1;
}
unsigned int scan_hexdump(const char *src,char *dest,unsigned int *destlen) {
register const unsigned char* s=(const unsigned char*) src;
unsigned long written=0,i;
for (i=0; s[i]; ++i) {
int j=fromhex(s[i]);
if (j<0) break;
dest[written]=j<<4;
j=fromhex(s[i+1]);
if (j<0) break;
dest[written]|=j;
i+=2;
++written;
}
*destlen=written;
return i;
}
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