grep: fix grep -F -e str1 -e str2 (was matching str2 only)

  by replacing "=" by "|=" here:
  found |= strstr(line, gl->pattern) != NULL;
grep: optimization: stop on first -e match
grep: stop using bss. -40 bytes 

1 files changed, 61 insertions, 37 deletions

diff --git a/findutils/grep.c b/findutils/grep.c
index c45d0ed89..a051c2f18 100644
--- a/findutils/grep.c
+++ b/findutils/grep.c
@@ -85,24 +85,43 @@ enum {
 #define FGREP_FLAG                  (option_mask32 & OPT_F)
 #define PRINT_FILES_WITHOUT_MATCHES (option_mask32 & OPT_L)
 
-typedef unsigned char byte_t;
-
-static int max_matches;
-static int reflags;
-static byte_t invert_search;
-static byte_t print_filename;
-static byte_t open_errors;
-
+struct globals {
+	int max_matches;
+	int reflags;
+	smalluint invert_search;
+	smalluint print_filename;
+	smalluint open_errors;
 #if ENABLE_FEATURE_GREP_CONTEXT
-static byte_t did_print_line;
-static int lines_before;
-static int lines_after;
-static char **before_buf;
-static int last_line_printed;
-#endif /* ENABLE_FEATURE_GREP_CONTEXT */
-/* globals used internally */
-static llist_t *pattern_head;   /* growable list of patterns to match */
-static const char *cur_file;    /* the current file we are reading */
+	smalluint did_print_line;
+	int lines_before;
+	int lines_after;
+	char **before_buf;
+	int last_line_printed;
+#endif
+	/* globals used internally */
+	llist_t *pattern_head;   /* growable list of patterns to match */
+	const char *cur_file;    /* the current file we are reading */
+};
+#define G (*(struct globals*)&bb_common_bufsiz1)
+#define INIT_G() \
+	do { \
+		struct G_sizecheck { \
+			char G_sizecheck[sizeof(G) > COMMON_BUFSIZE ? -1 : 1]; \
+		}; \
+	} while (0)
+#define max_matches       (G.max_matches         )
+#define reflags           (G.reflags             )
+#define invert_search     (G.invert_search       )
+#define print_filename    (G.print_filename      )
+#define open_errors       (G.open_errors         )
+#define did_print_line    (G.did_print_line      )
+#define lines_before      (G.lines_before        )
+#define lines_after       (G.lines_after         )
+#define before_buf        (G.before_buf          )
+#define last_line_printed (G.last_line_printed   )
+#define pattern_head      (G.pattern_head        )
+#define cur_file          (G.cur_file            )
+
 
 typedef struct grep_list_data_t {
 	char *pattern;
@@ -112,6 +131,7 @@ typedef struct grep_list_data_t {
 	int flg_mem_alocated_compiled;
 } grep_list_data_t;
 
+
 static void print_line(const char *line, int linenum, char decoration)
 {
 #if ENABLE_FEATURE_GREP_CONTEXT
@@ -140,7 +160,7 @@ static void print_line(const char *line, int linenum, char decoration)
 static int grep_file(FILE *file)
 {
 	char *line;
-	byte_t ret;
+	smalluint found;
 	int linenum = 0;
 	int nmatches = 0;
 	regmatch_t regmatch;
@@ -154,14 +174,14 @@ static int grep_file(FILE *file)
 
 	while ((line = xmalloc_getline(file)) != NULL) {
 		llist_t *pattern_ptr = pattern_head;
-		grep_list_data_t * gl;
+		grep_list_data_t *gl;
 
 		linenum++;
-		ret = 0;
+		found = 0;
 		while (pattern_ptr) {
 			gl = (grep_list_data_t *)pattern_ptr->data;
 			if (FGREP_FLAG) {
-				ret = strstr(line, gl->pattern) != NULL;
+				found |= strstr(line, gl->pattern) != NULL;
 			} else {
 				/*
 				 * test for a postitive-assertion match (regexec returns success (0)
@@ -177,7 +197,7 @@ static int grep_file(FILE *file)
 				regmatch.rm_eo = 0;
 				if (regexec(&(gl->preg), line, 1, &regmatch, 0) == 0) {
 					if (!(option_mask32 & OPT_w))
-						ret = 1;
+						found = 1;
 					else {
 						char c = ' ';
 						if (regmatch.rm_so)
@@ -185,15 +205,20 @@ static int grep_file(FILE *file)
 						if (!isalnum(c) && c != '_') {
 							c = line[regmatch.rm_eo];
 							if (!c || (!isalnum(c) && c != '_'))
-								ret = 1;
+								found = 1;
 						}
 					}
 				}
 			}
+			/* If it's non-inverted search, we can stop
+			 * at first match */
+			if (found && !invert_search)
+				goto do_found;
 			pattern_ptr = pattern_ptr->link;
 		} /* while (pattern_ptr) */
 
-		if (ret ^ invert_search) {
+		if (found ^ invert_search) {
+ do_found:
 			/* keep track of matches */
 			nmatches++;
 
@@ -310,18 +335,18 @@ static int grep_file(FILE *file)
 
 #if ENABLE_FEATURE_CLEAN_UP
 #define new_grep_list_data(p, m) add_grep_list_data(p, m)
-static char * add_grep_list_data(char *pattern, int flg_used_mem)
+static char *add_grep_list_data(char *pattern, int flg_used_mem)
 #else
 #define new_grep_list_data(p, m) add_grep_list_data(p)
-static char * add_grep_list_data(char *pattern)
+static char *add_grep_list_data(char *pattern)
 #endif
 {
-	grep_list_data_t *gl = xmalloc(sizeof(grep_list_data_t));
+	grep_list_data_t *gl = xzalloc(sizeof(*gl));
 	gl->pattern = pattern;
 #if ENABLE_FEATURE_CLEAN_UP
 	gl->flg_mem_alocated_compiled = flg_used_mem;
 #else
-	gl->flg_mem_alocated_compiled = 0;
+	/*gl->flg_mem_alocated_compiled = 0;*/
 #endif
 	return (char *)gl;
 }
@@ -443,9 +468,11 @@ int grep_main(int argc, char **argv)
 	if (!(option_mask32 & (OPT_o | OPT_w)))
 		reflags = REG_NOSUB;
 
-	if (ENABLE_FEATURE_GREP_EGREP_ALIAS &&
-			(applet_name[0] == 'e' || (option_mask32 & OPT_E)))
+	if (ENABLE_FEATURE_GREP_EGREP_ALIAS
+	 && (applet_name[0] == 'e' || (option_mask32 & OPT_E))
+	) {
 		reflags |= REG_EXTENDED;
+	}
 
 	if (option_mask32 & OPT_i)
 		reflags |= REG_ICASE;
@@ -476,10 +503,8 @@ int grep_main(int argc, char **argv)
 
 	/* If no files were specified, or '-' was specified, take input from
 	 * stdin. Otherwise, we grep through all the files specified. */
-	if (argc == 0)
-		argc++;
 	matched = 0;
-	while (argc--) {
+	do {
 		cur_file = *argv++;
 		file = stdin;
 		if (!cur_file || (*cur_file == '-' && !cur_file[1])) {
@@ -506,14 +531,13 @@ int grep_main(int argc, char **argv)
 		matched += grep_file(file);
 		fclose_if_not_stdin(file);
  grep_done: ;
-	}
+	} while (--argc > 0);
 
 	/* destroy all the elments in the pattern list */
 	if (ENABLE_FEATURE_CLEAN_UP) {
 		while (pattern_head) {
 			llist_t *pattern_head_ptr = pattern_head;
-			grep_list_data_t *gl =
-				(grep_list_data_t *)pattern_head_ptr->data;
+			grep_list_data_t *gl = (grep_list_data_t *)pattern_head_ptr->data;
 
 			pattern_head = pattern_head->link;
 			if ((gl->flg_mem_alocated_compiled & PATTERN_MEM_A))
@@ -527,5 +551,5 @@ int grep_main(int argc, char **argv)
 	/* 0 = success, 1 = failed, 2 = error */
 	if (open_errors)
 		return 2;
-	return !matched; /* invert return value 0 = success, 1 = failed */
+	return !matched; /* invert return value: 0 = success, 1 = failed */
 }