sha1_name.c: correct misnamed "canonical" and "res"

These are hexadecimal and binary representation of the short object
name given to the callchain as its input.  Rename them with _pfx
suffix to make it clear they are prefixes, and call them hex and bin
respectively.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/sha1_name.c b/sha1_name.c
index 7bef45fcea14c6c14e723788c125509c494e0ec1..db8ac83a12693393f3d155f5cfef376740887272 100644 (file)
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -9,7 +9,7 @@
 
 static int get_sha1_oneline(const char *, unsigned char *, struct commit_list *);
 
-static int find_short_object_filename(int len, const char *name, unsigned char *sha1)
+static int find_short_object_filename(int len, const char *hex_pfx, unsigned char *sha1)
 {
        struct alternate_object_database *alt;
        char hex[40];
@@ -34,18 +34,18 @@ static int find_short_object_filename(int len, const char *name, unsigned char *
        }
        fakeent->next = alt_odb_list;
 
-       sprintf(hex, "%.2s", name);
+       sprintf(hex, "%.2s", hex_pfx);
        for (alt = fakeent; alt && found < 2; alt = alt->next) {
                struct dirent *de;
                DIR *dir;
-               sprintf(alt->name, "%.2s/", name);
+               sprintf(alt->name, "%.2s/", hex_pfx);
                dir = opendir(alt->base);
                if (!dir)
                        continue;
                while ((de = readdir(dir)) != NULL) {
                        if (strlen(de->d_name) != 38)
                                continue;
-                       if (memcmp(de->d_name, name + 2, len - 2))
+                       if (memcmp(de->d_name, hex_pfx + 2, len - 2))
                                continue;
                        if (!found) {
                                memcpy(hex + 2, de->d_name, 38);
@@ -79,7 +79,7 @@ static int match_sha(unsigned len, const unsigned char *a, const unsigned char *
 }
 
 static int unique_in_pack(int len,
-                         const unsigned char *match,
+                         const unsigned char *bin_pfx,
                          struct packed_git *p,
                          const unsigned char **found_sha1,
                          int seen_so_far)
@@ -96,7 +96,7 @@ static int unique_in_pack(int len,
                int cmp;
 
                current = nth_packed_object_sha1(p, mid);
-               cmp = hashcmp(match, current);
+               cmp = hashcmp(bin_pfx, current);
                if (!cmp) {
                        first = mid;
                        break;
@@ -110,12 +110,12 @@ static int unique_in_pack(int len,
 
        /*
         * At this point, "first" is the location of the lowest object
-        * with an object name that could match "match".  See if we have
+        * with an object name that could match "bin_pfx".  See if we have
         * 0, 1 or more objects that actually match(es).
         */
        for (i = first; i < num; i++) {
                current = nth_packed_object_sha1(p, first);
-               if (!match_sha(len, match, current))
+               if (!match_sha(len, bin_pfx, current))
                        break;
 
                /* current matches */
@@ -131,7 +131,7 @@ static int unique_in_pack(int len,
        return seen_so_far;
 }
 
-static int find_short_packed_object(int len, const unsigned char *match, unsigned char *sha1)
+static int find_short_packed_object(int len, const unsigned char *bin_pfx, unsigned char *sha1)
 {
        struct packed_git *p;
        const unsigned char *found_sha1 = NULL;
@@ -139,7 +139,7 @@ static int find_short_packed_object(int len, const unsigned char *match, unsigne
 
        prepare_packed_git();
        for (p = packed_git; p && found < 2; p = p->next)
-               found = unique_in_pack(len, match, p, &found_sha1, found);
+               found = unique_in_pack(len, bin_pfx, p, &found_sha1, found);
 
        if (found == 1)
                hashcpy(sha1, found_sha1);
@@ -149,15 +149,15 @@ static int find_short_packed_object(int len, const unsigned char *match, unsigne
 #define SHORT_NAME_NOT_FOUND (-1)
 #define SHORT_NAME_AMBIGUOUS (-2)
 
-static int find_unique_short_object(int len, char *canonical,
-                                   unsigned char *res, unsigned char *sha1)
+static int find_unique_short_object(int len, char *hex_pfx,
+                                   unsigned char *bin_pfx, unsigned char *sha1)
 {
        int has_unpacked, has_packed;
        unsigned char unpacked_sha1[20], packed_sha1[20];
 
        prepare_alt_odb();
-       has_unpacked = find_short_object_filename(len, canonical, unpacked_sha1);
-       has_packed = find_short_packed_object(len, res, packed_sha1);
+       has_unpacked = find_short_object_filename(len, hex_pfx, unpacked_sha1);
+       has_packed = find_short_packed_object(len, bin_pfx, packed_sha1);
        if (!has_unpacked && !has_packed)
                return SHORT_NAME_NOT_FOUND;
        if (1 < has_unpacked || 1 < has_packed)
@@ -177,13 +177,13 @@ static int get_short_sha1(const char *name, int len, unsigned char *sha1,
                          int quietly)
 {
        int i, status;
-       char canonical[40];
-       unsigned char res[20];
+       char hex_pfx[40];
+       unsigned char bin_pfx[20];
 
        if (len < MINIMUM_ABBREV || len > 40)
                return -1;
-       hashclr(res);
-       memset(canonical, 'x', 40);
+       hashclr(bin_pfx);
+       memset(hex_pfx, 'x', 40);
        for (i = 0; i < len ;i++) {
                unsigned char c = name[i];
                unsigned char val;
@@ -197,15 +197,15 @@ static int get_short_sha1(const char *name, int len, unsigned char *sha1,
                }
                else
                        return -1;
-               canonical[i] = c;
+               hex_pfx[i] = c;
                if (!(i & 1))
                        val <<= 4;
-               res[i >> 1] |= val;
+               bin_pfx[i >> 1] |= val;
        }
 
-       status = find_unique_short_object(i, canonical, res, sha1);
+       status = find_unique_short_object(i, hex_pfx, bin_pfx, sha1);
        if (!quietly && (status == SHORT_NAME_AMBIGUOUS))
-               return error("short SHA1 %.*s is ambiguous.", len, canonical);
+               return error("short SHA1 %.*s is ambiguous.", len, hex_pfx);
        return status;
 }