Added back cregex with examples. Found the bug in his code.

4 files changed, 92 insertions, 1 deletions

diff --git a/examples/regex1.c b/examples/regex1.c
new file mode 100644
index 00000000..7385d69e
--- /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_matches(&float_expr, input.str))
+                printf("Input is a float\n");
+            else
+                printf("Invalid input : Not a float\n");
+        }
+    }
+}
diff --git a/examples/regex2.c b/examples/regex2.c
new file mode 100644
index 00000000..5509baa5
--- /dev/null
+++ b/examples/regex2.c
@@ -0,0 +1,31 @@
+#include <stc/cregex.h>
+#include <stc/csview.h>
+#include <stc/cstr.h>
+
+int main()
+{
+    const char* inputs[] = {"birthday: 1964-12-05", "https://en.cppreference.com/w/cpp/regex/regex_search", "!123abcabc!"};
+    const char* patterns[] = {"([0-9]{4})-(1[0-2]|0[1-9])-(3[01]|[12][0-9]|0[1-9])",
+                              "(https?:\\/\\/|ftp:\\/\\/|www\\.)([0-9A-Za-z-@:%_+~#=]+\\.)+([a-z]{2,3})(\\/[\\/0-9A-Za-z-\\.@:%_+~#=\\?&]*)?",
+                              "!((abc|123)+)!",
+    };
+    c_forrange (i, c_arraylen(inputs))
+    {
+        c_auto (cregex, re)
+        {
+            re = cregex_new(patterns[i]);
+            csview m;
+            if (cregex_find_sv(&re, inputs[i], &m))
+            {
+                printf("input: %s\n", inputs[i]);
+                c_forrange (j, cregex_capture_size(re))
+                {
+                    csview cap; 
+                    bool res = cregex_capture_sv(&re, j, &cap);
+                    if (res) printf("  submatch %zu: " c_PRIsv "\n", j, c_ARGsv(cap));
+                }
+                puts("");
+            }
+        }
+    }
+}
diff --git a/examples/regex_match.c b/examples/regex_match.c
new file mode 100644
index 00000000..17e3355f
--- /dev/null
+++ b/examples/regex_match.c
@@ -0,0 +1,35 @@
+#include <stdio.h>
+#include <stc/csview.h>
+#include <stc/cregex.h>
+#include <stc/crandom.h>
+#define i_val double
+#define i_type Vecu64
+#include <stc/cstack.h>
+#include <time.h>
+
+
+int main()
+{
+    // Lets find the first sequence of digits in a string
+    const char *s = "Hello numeric world, there are 24 hours in a day, 3600 seconds in an hour."
+                    " Around 365.25 days a year, and 52 weeks in a year."
+                    " Boltzmann const: 1.38064852E-23, is very small."
+                    " Bohrradius is 5.29177210903e-11, and Avogadros number is 6.02214076e23.";
+
+    c_auto (cregex, re)
+    {
+        re = cregex_new("[+-]?([0-9]*\\.)?[0-9]+([Ee][-+]?[0-9]+)?");
+        cregex_match match;
+        if (cregex_find(&re, s, &match)) {
+            printf("Found digits at position %zu-%zu\n", match.start, match.end);
+        } else {
+            printf("Could not find any digits\n");
+        }
+
+        csview sv = {0};
+        while (cregex_find_next_sv(&re, s, &sv)) {
+            printf(c_PRIsv " ; ", c_ARGsv(sv));
+        }
+        puts("");
+    }
+}
diff --git a/examples/stack.c b/examples/stack.c
index f392ecd1..29b39aef 100644
--- a/examples/stack.c
+++ b/examples/stack.c
@@ -1,6 +1,5 @@
 

 #include <stdio.h>

-#include <stc/cstr.h>

 

 #define i_tag i

 #define i_val int