Added cregex_replace*() [implemented in utf8code.c]. Added examples/regex_replace.c. Docs not ready, i.e. API not fixed. Some other refactoring and minor fixes/improvements. cstr_assign_sv() now returns char* like the other cstr_assign*().

1 files changed, 35 insertions, 0 deletions

diff --git a/examples/regex_replace.c b/examples/regex_replace.c
new file mode 100644
index 00000000..1216701f
--- /dev/null
+++ b/examples/regex_replace.c
@@ -0,0 +1,35 @@
+#define i_implement
+#include <stc/cstr.h>
+#include <stc/cregex.h>
+#include <stc/csview.h>
+
+cstr sub_20y(int i, csview m) {
+    if (i == 1) { // year
+        int year;
+        sscanf(m.str, "%4d", &year);
+        return cstr_from_fmt("%04d", year - 20);
+    }
+    return cstr_from_sv(m);
+}
+
+int main()
+{
+    const char* pattern = "\\b(\\d\\d\\d\\d)-(1[0-2]|0[1-9])-(3[01]|[12][0-9]|0[1-9])\\b";
+    const char* input = "start date: 2015-12-31, end date: 2022-02-28";
+
+    c_auto (cregex, re)
+    c_auto (cstr, str1, str2)
+    {
+        printf("input: %s\n", input);
+        /* European date format */
+        str1 = cregex_replace(input, pattern, "\\3.\\2.\\1");
+        printf("euros: %s\n", cstr_str(&str1));
+
+        /* US date format, and subtract 20 years: */
+        str2 = cregex_replace_fn(input, pattern, "\\1/\\3/\\2", sub_20y, 0, 0);
+        printf("us-20: %s\n", cstr_str(&str2));
+    }
+}
+
+#include "../src/cregex.c"
+#include "../src/utf8code.c"