New infrastructure for od (oops).

diff --git a/lib/lib.c b/lib/lib.c
index 6cb82e2..2b32109 100644 (file)
--- a/lib/lib.c
+++ b/lib/lib.c
@@ -286,6 +286,27 @@ off_t xlseek(int fd, off_t offset, int whence)
        return offset;
 }
 
+off_t lskip(int fd, off_t offset)
+{
+       off_t and = lseek(fd, offset, SEEK_CUR);
+
+       if (and != -1 && offset >= lseek(fd, offset, SEEK_END)
+               && offset+and == lseek(fd, offset+and, SEEK_SET)) return 0;
+       else {
+               char buf[4096];
+               while (offset>0) {
+                       int try = offset>sizeof(buf) ? sizeof(buf) : offset, or;
+
+                       or = readall(fd, buf, try);
+                       if (or < 0) perror_msg("lskip to %lld", (long long)offset);
+                       else offset -= try;
+                       if (or < try) break;
+               }
+
+               return offset;
+       }
+}
+
 char *xgetcwd(void)
 {
        char *buf = getcwd(NULL, 0);
@@ -503,8 +524,7 @@ long atolx(char *numstr)
        long val = strtol(numstr, &c, 0);
 
        if (*c) {
-               end = strchr(suffixes, tolower(*c));
-               if (end) {
+               if (c != numstr && (end = strchr(suffixes, tolower(*c)))) {
                        int shift = end-suffixes;
                        if (shift--) val *= 1024L<<(shift*10);
                } else {
@@ -526,6 +546,17 @@ int numlen(long l)
     return len;
 }
 
+int stridx(char *haystack, char needle)
+{
+       char *off;
+
+       if (!needle) return -1;
+       off = strchr(haystack, needle);
+       if (!off) return -1;
+
+       return off-haystack;
+}
+
 // Return how long the file at fd is, if there's any way to determine it.
 off_t fdlength(int fd)
 {

diff --git a/lib/lib.h b/lib/lib.h
index 5ed0603..4c23009 100644 (file)
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -65,9 +65,9 @@ void get_optflags(void);
 struct dirtree {
        struct dirtree *next, *parent, *child;
        long extra; // place for user to store their stuff (can be pointer)
-       long data;  // dirfd for directory, linklen for symlink, -1 = comeagain
        struct stat st;
        char *symlink;
+       int data;  // dirfd for directory, linklen for symlink, -1 = comeagain
        char name[];
 };
 
@@ -112,6 +112,7 @@ size_t xread(int fd, void *buf, size_t len);
 void xreadall(int fd, void *buf, size_t len);
 void xwrite(int fd, void *buf, size_t len);
 off_t xlseek(int fd, off_t offset, int whence);
+off_t lskip(int fd, off_t offset);
 char *readfile(char *name);
 char *xreadfile(char *name);
 char *xgetcwd(void);
@@ -128,6 +129,7 @@ char *utoa(unsigned n);
 char *itoa(int n);
 long atolx(char *c);
 int numlen(long l);
+int stridx(char *haystack, char needle);
 off_t fdlength(int fd);
 char *xreadlink(char *name);
 void loopfiles_rw(char **argv, int flags, int permissions, int failok,