From b1c62797f6344eaea6cb55959c9f438481359c75 Mon Sep 17 00:00:00 2001
From: Tyge Løvset <tylo@norceresearch.no>
Date: Sun, 9 Jan 2022 23:43:58 +0100
Subject: Small cregex API change. Added 2 examples.

---
 examples/regex1.c    | 26 ++++++++++++++++++++++++++
 examples/regex2.c    | 26 ++++++++++++++++++++++++++
 include/stc/cregex.h | 12 ++++++------
 tests/cregex_test.c  |  4 ++--
 4 files changed, 60 insertions(+), 8 deletions(-)
 create mode 100644 examples/regex1.c
 create mode 100644 examples/regex2.c

diff --git a/examples/regex1.c b/examples/regex1.c
new file mode 100644
index 00000000..9b450453
--- /dev/null
+++ b/examples/regex1.c
@@ -0,0 +1,26 @@
+#include <stc/cstr.h>
+#include <stc/cregex.h>
+
+int main()
+{
+    c_auto (cstr, input)
+    c_auto (cregex, float_expr)
+    {
+        float_expr = cregex_new("[+-]?([0-9]+([.][0-9]*)?|[.][0-9]+)");
+        // Until "q" is given, ask for another number
+        while (true)
+        {
+            printf("Enter float number (q for quit): ");
+            cstr_getline(&input, stdin);
+
+            // Exit when the user inputs q
+            if (cstr_equals(input, "q"))
+                break;
+            
+            if (cregex_is_match(&float_expr, input.str))
+                printf("Input is a float\n");
+            else
+                printf("Invalid input : Not a float\n");
+        }
+    }
+}
\ No newline at end of file
diff --git a/examples/regex2.c b/examples/regex2.c
new file mode 100644
index 00000000..73abee45
--- /dev/null
+++ b/examples/regex2.c
@@ -0,0 +1,26 @@
+#include <stc/cregex.h>
+#include <stc/csview.h>
+#include <stc/cstr.h>
+
+int main()
+{
+    const char* fnames[] = {"foofile.txt", "barfile.txt", "bazboy.dat", "zoidberg"};
+    c_auto (cregex, re)
+    {
+        re = cregex_new("([a-z]+)\\.([a-z]+)");
+
+        c_forrange (i, c_arraylen(fnames))
+        {
+            printf("%s\n", fnames[i]);
+            if (cregex_is_match(&re, fnames[i]))
+            {
+                c_forrange (j, cregex_capture_size(re))
+                {
+                    csview cap; cregex_capture_v(&re, j, &cap);
+                    printf("  submatch %d: " c_PRIsv "\n", j, c_ARGsv(cap));
+                }
+                puts("");
+            }
+        }
+    }
+}
diff --git a/include/stc/cregex.h b/include/stc/cregex.h
index 82e9a60c..84799d75 100644
--- a/include/stc/cregex.h
+++ b/include/stc/cregex.h
@@ -84,13 +84,13 @@ STC_INLINE bool cregex_find_v(cregex *rx, const char *s, csview *sv) {
 }
 
 /* get captured slice from capture group number index */
-STC_API bool cregex_capture(cregex rx, size_t index, cregex_match *m);
+STC_API bool cregex_capture(cregex *rx, size_t index, cregex_match *m);
 
 /* get captured slice from capture group number index as a csview */
-STC_INLINE bool cregex_capture_v(cregex rx, size_t index, csview *sv) {
+STC_INLINE bool cregex_capture_v(cregex *rx, size_t index, csview *sv) {
     cregex_match m;
     bool ret = cregex_capture(rx, index, &m);
-    *sv = c_make(csview){rx.input + m.start, m.end - m.start};
+    *sv = c_make(csview){rx->input + m.start, m.end - m.start};
     return ret;
 }
 
@@ -901,7 +901,7 @@ STC_DEF bool cregex_find_next(cregex *rx, const char *s, cregex_match *m)
 
 STC_API bool cregex_find_next_v(cregex *rx, const char *s, csview *sv)
 {
-    cregex_match m = { (size_t)(sv->str - s), m.start + sv->size };
+    cregex_match m = {(size_t)(sv->str - s), m.start + sv->size};
     
     bool res = cregex_find_next(rx, s, &m);
     *sv = c_make(csview){s + m.start, m.end - m.start};
@@ -966,9 +966,9 @@ static cregex_node *_rx_find_capture_node(cregex_node *node, size_t index)
     }
 }
 
-STC_DEF bool cregex_capture(cregex rx, size_t index, cregex_match *m)
+STC_DEF bool cregex_capture(cregex *rx, size_t index, cregex_match *m)
 {
-    _rx_CapNode *cap = (_rx_CapNode *)_rx_find_capture_node(rx.nodes, index);
+    _rx_CapNode *cap = (_rx_CapNode *)_rx_find_capture_node(rx->nodes, index);
 
     if (!cap) return false;
 
diff --git a/tests/cregex_test.c b/tests/cregex_test.c
index 54973ee2..a2691152 100644
--- a/tests/cregex_test.c
+++ b/tests/cregex_test.c
@@ -296,8 +296,8 @@ START_TEST(captures_cap)
         ck_assert(cregex_find(&re, "xxabcdcde", &match));
 
         cregex_match cap0, cap1;
-        cregex_capture(re, 0, &cap0);
-        cregex_capture(re, 1, &cap1);
+        cregex_capture(&re, 0, &cap0);
+        cregex_capture(&re, 1, &cap1);
 
         ck_assert_uint_eq(cap0.start, 2);
         ck_assert_uint_eq(cap0.end, 4);
-- 
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