[COMMIT] Fix recognition of coding magic cookie in autodetection

NOTE: This patch has been committed. src/ChangeLog addition: 2005-01-29 Ben Wing <ben(a)xemacs.org&gt; * file-coding.c (snarf_coding_system): Use UExtbyte for semantic correctness. * file-coding.c (look_for_coding_system_magic_cookie): Fix code that recognizes ;;;###coding cookie. docs-misc source patch: Diff command: bash -ci "cvs-diff --show-c-function -no-changelog " Files affected: src/file-coding.c Index: src/file-coding.c =================================================================== RCS file: /pack/xemacscvs/XEmacs/xemacs/src/file-coding.c,v retrieving revision 1.42 diff -u -p -r1.42 file-coding.c --- src/file-coding.c 2005/01/24 23:33:54 1.42 +++ src/file-coding.c 2005/01/29 09:04:30 ＠＠ -3541,10 +3541,10 ＠＠ detected_coding_system (struct detection blanks). If found, return it, otherwise nil. */ static Lisp_Object -snarf_coding_system (const Ibyte *p, Bytecount len) +snarf_coding_system (const UExtbyte *p, Bytecount len) { Bytecount n; - Ibyte *name; + UExtbyte *name; while (*p == ' ' || *p == '\t') p++, len--; len = min (len, 1000); ＠＠ -3563,7 +3563,9 ＠＠ snarf_coding_system (const Ibyte *p, Byt if (n > 0) { name[n] = '\0'; - return find_coding_system_for_text_file (intern_int (name), 0); + /* This call to intern_int() is OK because we already verified that + there are only ASCII characters in the string */ + return find_coding_system_for_text_file (intern_int ((Ibyte *) name), 0); } return Qnil; ＠＠ -3598,6 +3600,7 ＠＠ look_for_coding_system_magic_cookie (con { const UExtbyte *p; const UExtbyte *scan_end; + Bytecount cookie_len; /* Look for initial "-*-"; mode line prefix */ for (p = data, ＠＠ -3639,20 +3642,26 ＠＠ look_for_coding_system_magic_cookie (con break; } -#if 0 - /* #### Totally wrong as is, rewrite */ - /* Look for initial ;;;###coding system */ + /* Look for ;;;###coding system */ + cookie_len = LENGTH (";;;###coding system: "); + + for (p = data, + scan_end = data + len - cookie_len; + p <= scan_end; + p++) { - Bytecount ind = fast_string_match (QScoding_system_cookie, - data, Qnil, 0, len, 0, ERROR_ME_NOT, - 1); - if (ind >= 0) - return - snarf_coding_system (data + ind + LENGTH (";;;###coding system: "), - len - ind - LENGTH (";;;###coding system: ")); + if (*p == ';' && !memcmp (p, ";;;###coding system: ", cookie_len)) + { + const UExtbyte *suffix; + + p += cookie_len; + suffix = p; + while (suffix < scan_end && !isspace (*suffix)) + suffix++; + return snarf_coding_system (p, suffix - p); + } } -#endif /* 0 */ return Qnil; }