added some info from @peterfillmore fork

[proxmark3-svn] / client / util.c

diff --git a/client/util.c b/client/util.c
index 8357f60137a5234007df335578656615e469cb65..9dab4655b73f6da99ba467ea366868e4bbac992f 100644 (file)
--- a/client/util.c
+++ b/client/util.c
@@ -364,13 +364,19 @@ int param_getlength(const char *line, int paramnum)
        return en - bg + 1;
 }
 
-char param_getchar(const char *line, int paramnum)
-{
+char param_getchar(const char *line, int paramnum) {
+       return param_getchar_indx(line, 0, paramnum);
+}
+
+char param_getchar_indx(const char *line, int indx, int paramnum) {
        int bg, en;
        
        if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
 
-       return line[bg];
+       if (bg + indx > en)
+               return '\0';
+       
+       return line[bg + indx];
 }
 
 uint8_t param_get8(const char *line, int paramnum)
@@ -480,6 +486,51 @@ int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
 
        return 0;
 }
+
+int param_gethex_to_eol(const char *line, int paramnum, uint8_t * data, int maxdatalen, int *datalen) {
+       int bg, en;
+       uint32_t temp;
+       char buf[5] = {0};
+
+       if (param_getptr(line, &bg, &en, paramnum)) return 1;
+
+       *datalen = 0;
+       
+       int indx = bg;
+       while (line[indx]) {
+               if (line[indx] == '\t' || line[indx] == ' ') 
+                       continue;
+               
+               if (isxdigit(line[indx])) {
+                       buf[strlen(buf) + 1] = 0x00;
+                       buf[strlen(buf)] = line[indx];
+               } else {
+                       // if we have symbols other than spaces and hex
+                       return 1;
+               }                               
+
+               if (*datalen >= maxdatalen) {
+                       // if we dont have space in buffer and have symbols to translate
+                       return 2;
+               }
+
+               if (strlen(buf) >= 2) {
+                       sscanf(buf, "%x", &temp);
+                       data[*datalen] = (uint8_t)(temp & 0xff);
+                       *buf = 0;
+                       (*datalen)++;
+               }
+               
+               indx++;
+       }
+
+       if (strlen(buf) > 0) 
+               //error when not completed hex bytes
+               return 3;
+               
+       return 0;
+}
+
 int param_getstr(const char *line, int paramnum, char * str)
 {
        int bg, en;