Merge pull request #44 from spicyjpeg/actions

GitHub Actions CI, psxcd and libc fixes, new examples

3 files changed, 30 insertions, 2 deletions

diff --git a/libpsn00b/libc/scanf.c b/libpsn00b/libc/scanf.c
index b6d4510..ae3c714 100644
--- a/libpsn00b/libc/scanf.c
+++ b/libpsn00b/libc/scanf.c
@@ -8,6 +8,9 @@
 #include <string.h>
 #include <strings.h>
 
+// Uncomment to enable support for %f.
+//#define ALLOW_FLOAT
+
 char libc_vsscanf_buf[512];
 char libc_vsscanf_allow[256];
 
@@ -354,7 +357,8 @@ int vsscanf(const char *str, const char *format, va_list ap)
 						r++;
 					}
 				break;
-						
+
+#ifdef ALLOW_FLOAT
 				case 'f': // Floating point number
 					libc_vsscanf_get_element(libc_vsscanf_buf, &str[sp], elem_skip_space, fsz);
 					fbuf = strtod(libc_vsscanf_buf, &ep);
@@ -380,6 +384,7 @@ int vsscanf(const char *str, const char *format, va_list ap)
 
 					conv = 0;
 				break;
+#endif
 
 			}
 		}
diff --git a/libpsn00b/libc/string.c b/libpsn00b/libc/string.c
index 445b227..a1a9a05 100644
--- a/libpsn00b/libc/string.c
+++ b/libpsn00b/libc/string.c
@@ -8,6 +8,10 @@
 #include <string.h>
 #include <stdlib.h>
 
+// Uncomment to enable strtod(), strtold() and strtof(). Note that these
+// functions use extremely slow software floats.
+//#define ALLOW_FLOAT
+
 int tolower(int chr)
 {
     return (chr >='A' && chr<='Z') ? (chr + 32) : (chr);    
@@ -252,6 +256,8 @@ long strtol(const char *nptr, char **endptr, int base)
 	return (long)strtoll(nptr, endptr, base);
 }
 
+#ifdef ALLOW_FLOAT
+
 double strtod(const char *nptr, char **endptr)
 {
 	char strbuf[64];
@@ -302,6 +308,8 @@ double strtod(const char *nptr, char **endptr)
 	return (i + d)*s;
 }
 
+#endif
+
 /* implementation by Lameguy64, behaves like OpenWatcom's strtok() */
 /* BIOS strtok seemed either bugged, or designed for wide chars */
 
@@ -344,6 +352,8 @@ char *strtok( char *s1, char *s2 )
 	
 } /* strtok */
 
+#ifdef ALLOW_FLOAT
+
 long double strtold(const char *nptr, char **endptr)
 {
 	return (long double)strtod(nptr, endptr);
@@ -352,4 +362,6 @@ long double strtold(const char *nptr, char **endptr)
 float strtof(const char *nptr, char **endptr)
 {
 	return (float)strtod(nptr, endptr);
-}
\ No newline at end of file
+}
+
+#endif
diff --git a/libpsn00b/libc/vsprintf.c b/libpsn00b/libc/vsprintf.c
index 0a99dcc..9ca4cc5 100644
--- a/libpsn00b/libc/vsprintf.c
+++ b/libpsn00b/libc/vsprintf.c
@@ -6,6 +6,10 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <stdarg.h>
+
+// Uncomment to enable support for %f.
+//#define ALLOW_FLOAT
 
 #define SPRINTF_ALT_FLAG			(1<<0)
 #define SPRINTF_ZERO_FLAG			(1<<1)
@@ -208,6 +212,8 @@ int libc_ulltoa(unsigned long i, char *dst, int n)
 	return n2;
 }
 
+#ifdef ALLOW_FLOAT
+
 void libc_float_to_string(float fl, char *dst, int n)
 {
 	unsigned int *p = (unsigned int*)&fl;
@@ -365,6 +371,8 @@ void libc_double_to_string(double fl, char *dst, int n)
 
 char libc_sprintf_floatbuf[64];
 
+#endif
+
 int vsnprintf(char *string, unsigned int size, const char *fmt, va_list ap)
 {
 	int string_pos,fmt_pos;
@@ -732,6 +740,7 @@ int vsnprintf(char *string, unsigned int size, const char *fmt, va_list ap)
 					directive_coming = 0;
 				break;
 
+#ifdef ALLOW_FLOAT
 				case 'f':
 					libc_double_to_string(va_arg(ap, double), libc_sprintf_floatbuf, 64);
 					
@@ -740,6 +749,8 @@ int vsnprintf(char *string, unsigned int size, const char *fmt, va_list ap)
 
 					directive_coming = 0;
 				break;
+#endif
+
 				case 'n': // Number of characters written
 					*(va_arg(ap,unsigned int*)) = string_pos;