trailer.c

   1 #include "cache.h"
   2 /*
   3  * Copyright (c) 2013, 2014 Christian Couder <chriscool@tuxfamily.org>
   4  */
   5
   6 enum action_where { WHERE_END, WHERE_AFTER, WHERE_BEFORE, WHERE_START };
   7 enum action_if_exists { EXISTS_ADD_IF_DIFFERENT_NEIGHBOR, EXISTS_ADD_IF_DIFFERENT,
   8                         EXISTS_ADD, EXISTS_REPLACE, EXISTS_DO_NOTHING };
   9 enum action_if_missing { MISSING_ADD, MISSING_DO_NOTHING };
  10
  11 struct conf_info {
  12         char *name;
  13         char *key;
  14         char *command;
  15         enum action_where where;
  16         enum action_if_exists if_exists;
  17         enum action_if_missing if_missing;
  18 };
  19
  20 static struct conf_info default_conf_info;
  21
  22 struct trailer_item {
  23         struct trailer_item *previous;
  24         struct trailer_item *next;
  25         const char *token;
  26         const char *value;
  27         struct conf_info conf;
  28 };
  29
  30 static struct trailer_item *first_conf_item;
  31
  32 static char *separators = ":";
  33
  34 static int after_or_end(enum action_where where)
  35 {
  36         return (where == WHERE_AFTER) || (where == WHERE_END);
  37 }
  38
  39 /*
  40  * Return the length of the string not including any final
  41  * punctuation. E.g., the input "Signed-off-by:" would return
  42  * 13, stripping the trailing punctuation but retaining
  43  * internal punctuation.
  44  */
  45 static size_t token_len_without_separator(const char *token, size_t len)
  46 {
  47         while (len > 0 && !isalnum(token[len - 1]))
  48                 len--;
  49         return len;
  50 }
  51
  52 static int same_token(struct trailer_item *a, struct trailer_item *b)
  53 {
  54         size_t a_len = token_len_without_separator(a->token, strlen(a->token));
  55         size_t b_len = token_len_without_separator(b->token, strlen(b->token));
  56         size_t min_len = (a_len > b_len) ? b_len : a_len;
  57
  58         return !strncasecmp(a->token, b->token, min_len);
  59 }
  60
  61 static int same_value(struct trailer_item *a, struct trailer_item *b)
  62 {
  63         return !strcasecmp(a->value, b->value);
  64 }
  65
  66 static int same_trailer(struct trailer_item *a, struct trailer_item *b)
  67 {
  68         return same_token(a, b) && same_value(a, b);
  69 }