From fb87f58ad96190a258dccff6f2c5faab031010e0 Mon Sep 17 00:00:00 2001
From: Tyge Løvset <tylo@norceresearch.no>
Date: Sun, 30 Aug 2020 19:01:02 +0200
Subject: Renamed cstr_destr to cstr_mdestroy(). Added a few more examples.

---
 examples/random.c  | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 examples/replace.c | 33 +++++++++++++++++++++++++++
 2 files changed, 100 insertions(+)
 create mode 100644 examples/random.c
 create mode 100644 examples/replace.c

(limited to 'examples')

diff --git a/examples/random.c b/examples/random.c
new file mode 100644
index 00000000..bf4bd6bd
--- /dev/null
+++ b/examples/random.c
@@ -0,0 +1,67 @@
+#include <stdio.h>
+#include <time.h>
+#include <stc/crandom.h>
+#include <stc/cstr.h>
+
+int main()
+{
+    enum {R = 30};
+    const size_t N = 1000000000;
+    clock_t difference, before;    
+    uint64_t sum = 0;
+
+    uint64_t seed = time(NULL);
+    crand_rng32_t pcg = crand_rng32_init(seed);
+    uint32_t range = crand_i32(&pcg) & ((1u << 28) - 1);
+    crand_uniform_i32_t dist0 = crand_uniform_i32_init(pcg, 0, range);
+
+    printf("32 uniform: %u\n", dist0.range);
+    double fsum = 0;
+    before = clock();
+    for (size_t i = 0; i < N; ++i) {
+        fsum += (double) crand_uniform_i32(&dist0) / dist0.range;
+    }
+    difference = clock() - before;
+    printf("%zu %f: %f secs\n", N, fsum / N, (float) difference / CLOCKS_PER_SEC);
+
+    pcg = crand_rng32_init(seed);
+    dist0 = crand_uniform_i32_init(pcg, 0, range);
+    puts("32 unbiased");
+    fsum = 0;
+    before = clock();
+    for (size_t i = 0; i < N; ++i) {
+        fsum += (double) crand_unbiased_i32(&dist0) / dist0.range;
+    }
+    difference = clock() - before;
+    printf("%zu %f: %f secs\n", N, fsum / N, (float) difference / CLOCKS_PER_SEC);
+
+    puts("64 uniform");
+    crand_rng64_t stc = crand_rng64_init(seed);
+    crand_uniform_i64_t dist1 = crand_uniform_i64_init(stc, 0, N);
+    sum = 0;
+    before = clock();    
+    for (size_t i = 0; i < N; ++i) {
+        sum += crand_uniform_i64(&dist1);
+    }
+    difference = clock() - before;
+    printf("%zu %f: %f secs\n", N, (double) sum / N, (float) difference / CLOCKS_PER_SEC);
+
+
+    puts("normal distribution");
+    crand_normal_f64_t dist2 = crand_normal_f64_init(stc, R / 2.0, R / 6.0);
+    size_t N2 = 10000000;
+    int hist[R] = {0};
+    sum = 0;
+    for (size_t i = 0; i < N2; ++i) {
+        int n = (int) (crand_normal_f64(&dist2) + 0.5);
+        sum += n;
+        if (n >= 0 && n < R) ++hist[n];
+    }
+    
+    cstr_t bar = cstr_init;
+    for (int i=0; i < R; ++i) {
+        cstr_take(&bar, cstr_with_size(hist[i] * 25ull * R / N2, '*'));
+        printf("%2d %s\n", i, bar.str);
+    }
+    cstr_destroy(&bar);
+}
\ No newline at end of file
diff --git a/examples/replace.c b/examples/replace.c
new file mode 100644
index 00000000..b31715c1
--- /dev/null
+++ b/examples/replace.c
@@ -0,0 +1,33 @@
+
+#include <stc/cstr.h>
+
+int main ()
+{
+  const char *base = "this is a test string.";
+  const char *s2 = "n example";
+  const char *s3 = "sample phrase";
+  const char *s4 = "useful.";
+
+  // replace signatures used in the same order as described above:
+
+  // Ustring positions:                        0123456789*123456789*12345
+  cstr_t s = cstr_make(base);              // "this is a test string."
+  
+  cstr_t m = cstr_clone(s);
+  cstr_append(&m, m.str);
+  cstr_append(&m, m.str);
+  printf("%s\n", m.str);
+  
+  cstr_replace(&s, 9, 5, s2);              // "this is an example string." (1)
+  printf("(1) %s\n", s.str);
+  cstr_replace_n(&s, 19, 6, s3+7, 6);      // "this is an example phrase." (2)
+  printf("(2) %s\n", s.str);
+  cstr_replace(&s, 8, 10, "just a");       // "this is just a phrase."     (3)
+  printf("(3) %s\n", s.str);
+  cstr_replace_n(&s, 8, 6,"a shorty", 7);  // "this is a short phrase."    (4)
+  printf("(4) %s\n", s.str);  
+  cstr_replace(&s, 22, 1, "!!!");          // "this is a short phrase!!!"  (5)
+  printf("(5) %s\n", s.str);  
+  
+  cstr_mdestroy(&s, &m);
+}
-- 
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