apply: refactor `git apply` option parsing

diff --git a/git-compat-util.h b/git-compat-util.h
index 49d4029b8dddcb06dc6bea3d5f47c020785e3ddf..de04df19a835fa66ada521098db2e9b2d80a904e 100644 (file)
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -440,6 +440,9 @@ static inline int const_error(void)
 
 extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
 extern void set_error_routine(void (*routine)(const char *err, va_list params));
+extern void (*get_error_routine(void))(const char *err, va_list params);
+extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
+extern void (*get_warn_routine(void))(const char *warn, va_list params);
 extern void set_die_is_recursing_routine(int (*routine)(void));
 extern void set_error_handle(FILE *);
 
@@ -473,6 +476,23 @@ static inline int skip_prefix(const char *str, const char *prefix,
        return 0;
 }
 
+/*
+ * Like skip_prefix, but promises never to read past "len" bytes of the input
+ * buffer, and returns the remaining number of bytes in "out" via "outlen".
+ */
+static inline int skip_prefix_mem(const char *buf, size_t len,
+                                 const char *prefix,
+                                 const char **out, size_t *outlen)
+{
+       size_t prefix_len = strlen(prefix);
+       if (prefix_len <= len && !memcmp(buf, prefix, prefix_len)) {
+               *out = buf + prefix_len;
+               *outlen = len - prefix_len;
+               return 1;
+       }
+       return 0;
+}
+
 /*
  * If buf ends with suffix, return 1 and subtract the length of the suffix
  * from *len. Otherwise, return 0 and leave *len untouched.
@@ -1045,3 +1065,5 @@ struct tm *git_gmtime_r(const time_t *, struct tm *);
 #endif
 
 #endif
+
+extern int cmd_main(int, const char **);