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garray: reimplement ga_concat_strings with stpcpy

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Less useless strlen(), stpcpy() is a more natural fit for this task.
ga_concat_strings() still has too much strlen() but that would be ugly to
remove for a function that's not used very often (just once in the current
codebase).
This commit is contained in:
Nicolas Hillegeer 2014-04-26 19:19:43 +02:00 committed by Thiago de Arruda
parent 6b486f41d1
commit cf68eda287
1 changed files with 12 additions and 9 deletions
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21
src/garray.c
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@ -104,23 +104,26 @@ void ga_remove_duplicate_strings(garray_T *gap)
/// @returns the concatenated strings
char_u* ga_concat_strings(garray_T *gap)
{
const int nelem = gap->ga_len;
const char **data = gap->ga_data;
size_t len = 0;
for (int i = 0; i < gap->ga_len; ++i) {
len += strlen(((char **)(gap->ga_data))[i]) + 1;
for (int i = 0; i < nelem; ++i) {
len += strlen(data[i]) + 1;
}
char *s = xmallocz(len);
char *const ret = xmallocz(len);
char *s = ret;
*s = NUL;
for (int i = 0; i < gap->ga_len; ++i) {
if (*s != NUL) {
strcat(s, ",");
for (int i = 0; i < nelem; ++i) {
s = xstpcpy(s, data[i]);
if (i < nelem - 1) {
s = xstpcpy(s, ",");
}
strcat(s, ((char **)(gap->ga_data))[i]);
}
return (char_u *)s;
return (char_u *) ret;
}
/// Concatenate a string to a growarray which contains characters.