libcdecl: Replace uintmax_t with unsigned (long) long.

[cdecl99.git] / src / output.c

diff --git a/src/output.c b/src/output.c
index 62c9c8f9bd0839330de432fde4ea79dac5d9f947..634b79e2906a622dddb7bc595d9f8cdaed2d88f6 100644 (file)
--- a/src/output.c
+++ b/src/output.c
@@ -1,6 +1,6 @@
 /*
  *  Helper functions for outputting text.
- *  Copyright © 2011, 2021, 2023 Nick Bowler
+ *  Copyright © 2011, 2021, 2023-2024 Nick Bowler
  *
  *  This program is free software: you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -17,6 +17,7 @@
  */
 #include <config.h>
 #include <stdio.h>
+#include <limits.h>
 #include <assert.h>
 
 #include "cdecl.h"
@@ -25,8 +26,6 @@
 #include "parse.h"
 #include "specstr.h"
 
-#define MIN(a, b) ((a) < (b) ? (a) : (b))
-
 size_t cdecl__advance(struct output_state *dst, size_t amount)
 {
        size_t x = MIN(amount, dst->dstlen);
@@ -38,12 +37,46 @@ size_t cdecl__advance(struct output_state *dst, size_t amount)
        return amount;
 }
 
+size_t cdecl__strlcpy(char *dst, const char *src, size_t dstlen)
+{
+       size_t srclen = strlen(src);
+
+       if (dstlen > 0) {
+               memcpy(dst, src, MIN(dstlen, srclen+1));
+               if (dstlen <= srclen)
+                       dst[dstlen-1] = 0;
+       }
+
+       return srclen;
+}
+
 size_t cdecl__emit(struct output_state *dst, const char *src)
 {
-       size_t rc = snprintf(dst->dst, dst->dstlen, "%s", src);
+       size_t rc = cdecl__strlcpy(dst->dst, src, dst->dstlen);
        return cdecl__advance(dst, rc);
 }
 
+enum {
+       /*
+        * upper bound on number of decimal digits required to convert
+        * cdecl_uintmax.
+        */
+       MAX_UINT_DIGITS = (CHAR_BIT * sizeof (cdecl_uintmax) + 2)/3
+};
+
+size_t cdecl__emit_uint(struct output_state *dst, cdecl_uintmax val)
+{
+       char buf[MAX_UINT_DIGITS + 1], *p = &buf[sizeof buf];
+
+       *(--p) = 0;
+       while (val > 0) {
+               *(--p) = '0' + val % 10;
+               val /= 10;
+       }
+
+       return cdecl__emit(dst, p);
+}
+
 static void explain_spec(struct output_state *dst, struct cdecl_declspec *s)
 {
        size_t rc;