1 files changed, 34 insertions, 0 deletions
diff --git a/misc/examples/regex_match.c b/misc/examples/regex_match.c
new file mode 100644
index 00000000..376b002e
--- /dev/null
+++ b/misc/examples/regex_match.c
@@ -0,0 +1,34 @@
+#define i_extern
+#include <stc/cregex.h>
+#include <stc/csview.h>
+#define i_val float
+#include <stc/cstack.h>
+
+int main()
+{
+    // Lets find the first sequence of digits in a string
+    const char *str = "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)
+    c_auto (cstack_float, vec)
+    c_auto (cstr, nums)
+    {
+        const char* pattern = "[+-]?([0-9]*\\.)?\\d+([Ee][+-]?\\d+)?";
+        int res = cregex_compile(&re, pattern, CREG_DEFAULT);
+        printf("%d: %s\n", res, pattern);
+
+        // extract and convert all numbers in str to floats
+        c_formatch (i, &re, str)
+            cstack_float_push(&vec, atof(i.match[0].str));
+
+        c_foreach (i, cstack_float, vec)
+            printf("  %g\n", *i.ref);
+
+        // extracts the numbers only to a comma separated string.
+        nums = cregex_replace_sv(&re, csview_from(str), " $0,", 0, NULL, CREG_R_STRIP);
+        printf("\n%s\n", cstr_str(&nums));
+    }
+}