Lev Walkin | 79f5495 | 2004-08-13 16:58:19 +0000 | [diff] [blame] | 1 | #include <asn1c_compat.h> |
| 2 | |
| 3 | #include <string.h> |
| 4 | #include <errno.h> |
| 5 | |
| 6 | #ifdef HAVE_SYS_PARAM_H |
| 7 | #include <sys/param.h> /* For MAXPATHLEN */ |
| 8 | #endif |
| 9 | |
| 10 | #ifndef MAXPATHLEN |
| 11 | #define MAXPATHLEN 1024 |
| 12 | #endif |
| 13 | |
| 14 | char * |
| 15 | a1c_basename(const char *path) { |
| 16 | static char strbuf[MAXPATHLEN]; |
| 17 | const char *pend; |
| 18 | const char *name; |
| 19 | |
| 20 | pend = path + strlen(path); |
| 21 | if(pend == path) { |
| 22 | strcpy(strbuf, "."); |
| 23 | return strbuf; |
| 24 | } |
| 25 | |
| 26 | /* Skip tailing slashes */ |
| 27 | for(pend--; pend > path && *pend == '/'; pend--); |
| 28 | |
| 29 | if(pend == path && *path == '/') { |
| 30 | strcpy(strbuf, "/"); |
| 31 | return strbuf; |
| 32 | } |
| 33 | |
| 34 | for(name = pend; name > path && name[-1] != '/'; name--); |
| 35 | |
| 36 | if((pend - name) >= sizeof(strbuf) - 1) { |
| 37 | errno = ENAMETOOLONG; |
| 38 | return 0; |
| 39 | } |
| 40 | |
| 41 | memcpy(strbuf, name, pend - name + 1); |
| 42 | strbuf[pend - name + 1] = '\0'; |
| 43 | |
| 44 | return strbuf; |
| 45 | } |
| 46 | |
| 47 | |
| 48 | char * |
| 49 | a1c_dirname(const char *path) { |
| 50 | static char strbuf[MAXPATHLEN]; |
| 51 | const char *pend; |
| 52 | const char *last = 0; |
| 53 | int in_slash = 0; |
| 54 | |
| 55 | /* One-pass determination of the last char of the pathname */ |
| 56 | for(pend = path; ; pend++) { |
Lev Walkin | 79f5495 | 2004-08-13 16:58:19 +0000 | [diff] [blame] | 57 | switch(*pend) { |
| 58 | case '\0': break; |
| 59 | case '/': |
| 60 | if(!in_slash) { |
| 61 | last = pend; |
| 62 | in_slash = 1; |
| 63 | } |
| 64 | continue; |
| 65 | default: |
| 66 | if(in_slash) in_slash = 0; |
| 67 | continue; |
| 68 | } |
| 69 | break; |
| 70 | } |
Lev Walkin | 79f5495 | 2004-08-13 16:58:19 +0000 | [diff] [blame] | 71 | |
| 72 | if(last <= path) { |
| 73 | strcpy(strbuf, *path == '/' ? "/" : "."); |
| 74 | return strbuf; |
| 75 | } |
| 76 | |
| 77 | if(!last) { |
| 78 | strcpy(strbuf, "/"); |
| 79 | return strbuf; |
| 80 | } |
| 81 | |
| 82 | if((last - path) >= sizeof(strbuf)) { |
| 83 | errno = ENAMETOOLONG; |
| 84 | return 0; |
| 85 | } |
| 86 | |
| 87 | memcpy(strbuf, path, last - path); |
| 88 | strbuf[last - path] = '\0'; |
| 89 | |
| 90 | return strbuf; |
| 91 | } |
| 92 | |