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[perf] Optimize check for zero length string

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strlen has O(n) complexity, checking for first
string char is '\0' just O(1).
This commit is contained in:
Tsarevich Dmitry 2020-02-23 18:08:21 +03:00
parent f667dd6616
commit c499da9364
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1 changed files with 1 additions and 1 deletions
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src/iso.c
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@ -445,7 +445,7 @@ static int udf_extract_files(udf_t *p_udf, udf_dirent_t *p_udf_dirent, const cha
while ((p_udf_dirent = udf_readdir(p_udf_dirent)) != NULL) { while ((p_udf_dirent = udf_readdir(p_udf_dirent)) != NULL) {
if (FormatStatus) goto out; if (FormatStatus) goto out;
psz_basename = udf_get_filename(p_udf_dirent); psz_basename = udf_get_filename(p_udf_dirent);
if (strlen(psz_basename) == 0) if (psz_basename[0] == '\0')
continue; continue;
length = (int)(3 + strlen(psz_path) + strlen(psz_basename) + strlen(psz_extract_dir) + 24); length = (int)(3 + strlen(psz_path) + strlen(psz_basename) + strlen(psz_extract_dir) + 24);
psz_fullpath = (char*)calloc(sizeof(char), length); psz_fullpath = (char*)calloc(sizeof(char), length);