--- /dev/null
+/*\r
+ Copyright 2001, 2002 Georges Menie (www.menie.org)\r
+ stdarg version contributed by Christian Ettinger\r
+\r
+ This program is free software; you can redistribute it and/or modify\r
+ it under the terms of the GNU Lesser General Public License as published by\r
+ the Free Software Foundation; either version 2 of the License, or\r
+ (at your option) any later version.\r
+\r
+ This program is distributed in the hope that it will be useful,\r
+ but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ GNU Lesser General Public License for more details.\r
+\r
+ You should have received a copy of the GNU Lesser General Public License\r
+ along with this program; if not, write to the Free Software\r
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r
+*/\r
+\r
+/*\r
+ putchar is the only external dependency for this file,\r
+ if you have a working putchar, leave it commented out.\r
+ If not, uncomment the define below and\r
+ replace outbyte(c) by your own function call.\r
+\r
+*/\r
+\r
+#define putchar(c) c\r
+\r
+#include <stdarg.h>\r
+\r
+static int tiny_print( char **out, const char *format, va_list args, unsigned int buflen );\r
+\r
+static void printchar(char **str, int c, char *buflimit)\r
+{\r
+ //extern int putchar(int c);\r
+\r
+ if (str) {\r
+ if( buflimit == ( char * ) 0 ) {\r
+ /* Limit of buffer not known, write charater to buffer. */\r
+ **str = (char)c;\r
+ ++(*str);\r
+ }\r
+ else if( ( ( unsigned long ) *str ) < ( ( unsigned long ) buflimit ) ) {\r
+ /* Withing known limit of buffer, write character. */\r
+ **str = (char)c;\r
+ ++(*str);\r
+ }\r
+ }\r
+ else\r
+ {\r
+ (void)putchar(c);\r
+ }\r
+}\r
+\r
+#define PAD_RIGHT 1\r
+#define PAD_ZERO 2\r
+\r
+static int prints(char **out, const char *string, int width, int pad, char *buflimit)\r
+{\r
+ register int pc = 0, padchar = ' ';\r
+\r
+ if (width > 0) {\r
+ register int len = 0;\r
+ register const char *ptr;\r
+ for (ptr = string; *ptr; ++ptr) ++len;\r
+ if (len >= width) width = 0;\r
+ else width -= len;\r
+ if (pad & PAD_ZERO) padchar = '0';\r
+ }\r
+ if (!(pad & PAD_RIGHT)) {\r
+ for ( ; width > 0; --width) {\r
+ printchar (out, padchar, buflimit);\r
+ ++pc;\r
+ }\r
+ }\r
+ for ( ; *string ; ++string) {\r
+ printchar (out, *string, buflimit);\r
+ ++pc;\r
+ }\r
+ for ( ; width > 0; --width) {\r
+ printchar (out, padchar, buflimit);\r
+ ++pc;\r
+ }\r
+\r
+ return pc;\r
+}\r
+\r
+/* the following should be enough for 32 bit int */\r
+#define PRINT_BUF_LEN 12\r
+\r
+static int printi(char **out, int i, int b, int sg, int width, int pad, int letbase, char *buflimit)\r
+{\r
+ char print_buf[PRINT_BUF_LEN];\r
+ register char *s;\r
+ register int t, neg = 0, pc = 0;\r
+ register unsigned int u = (unsigned int)i;\r
+\r
+ if (i == 0) {\r
+ print_buf[0] = '0';\r
+ print_buf[1] = '\0';\r
+ return prints (out, print_buf, width, pad, buflimit);\r
+ }\r
+\r
+ if (sg && b == 10 && i < 0) {\r
+ neg = 1;\r
+ u = (unsigned int)-i;\r
+ }\r
+\r
+ s = print_buf + PRINT_BUF_LEN-1;\r
+ *s = '\0';\r
+\r
+ while (u) {\r
+ t = (unsigned int)u % b;\r
+ if( t >= 10 )\r
+ t += letbase - '0' - 10;\r
+ *--s = (char)(t + '0');\r
+ u /= b;\r
+ }\r
+\r
+ if (neg) {\r
+ if( width && (pad & PAD_ZERO) ) {\r
+ printchar (out, '-', buflimit);\r
+ ++pc;\r
+ --width;\r
+ }\r
+ else {\r
+ *--s = '-';\r
+ }\r
+ }\r
+\r
+ return pc + prints (out, s, width, pad, buflimit);\r
+}\r
+\r
+static int tiny_print( char **out, const char *format, va_list args, unsigned int buflen )\r
+{\r
+ register int width, pad;\r
+ register int pc = 0;\r
+ char scr[2], *buflimit;\r
+\r
+ if( buflen == 0 ){\r
+ buflimit = ( char * ) 0;\r
+ }\r
+ else {\r
+ /* Calculate the last valid buffer space, leaving space for the NULL\r
+ terminator. */\r
+ buflimit = ( *out ) + ( buflen - 1 );\r
+ }\r
+\r
+ for (; *format != 0; ++format) {\r
+ if (*format == '%') {\r
+ ++format;\r
+ width = pad = 0;\r
+ if (*format == '\0') break;\r
+ if (*format == '%') goto out;\r
+ if (*format == '-') {\r
+ ++format;\r
+ pad = PAD_RIGHT;\r
+ }\r
+ while (*format == '0') {\r
+ ++format;\r
+ pad |= PAD_ZERO;\r
+ }\r
+ for ( ; *format >= '0' && *format <= '9'; ++format) {\r
+ width *= 10;\r
+ width += *format - '0';\r
+ }\r
+ if( *format == 's' ) {\r
+ register char *s = (char *)va_arg( args, int );\r
+ pc += prints (out, s?s:"(null)", width, pad, buflimit);\r
+ continue;\r
+ }\r
+ if( *format == 'd' ) {\r
+ pc += printi (out, va_arg( args, int ), 10, 1, width, pad, 'a', buflimit);\r
+ continue;\r
+ }\r
+ if( *format == 'x' ) {\r
+ pc += printi (out, va_arg( args, int ), 16, 0, width, pad, 'a', buflimit);\r
+ continue;\r
+ }\r
+ if( *format == 'X' ) {\r
+ pc += printi (out, va_arg( args, int ), 16, 0, width, pad, 'A', buflimit);\r
+ continue;\r
+ }\r
+ if( *format == 'u' ) {\r
+ pc += printi (out, va_arg( args, int ), 10, 0, width, pad, 'a', buflimit);\r
+ continue;\r
+ }\r
+ if( *format == 'c' ) {\r
+ /* char are converted to int then pushed on the stack */\r
+ scr[0] = (char)va_arg( args, int );\r
+ scr[1] = '\0';\r
+ pc += prints (out, scr, width, pad, buflimit);\r
+ continue;\r
+ }\r
+ }\r
+ else {\r
+ out:\r
+ printchar (out, *format, buflimit);\r
+ ++pc;\r
+ }\r
+ }\r
+ if (out) **out = '\0';\r
+ va_end( args );\r
+ return pc;\r
+}\r
+\r
+int printf(const char *format, ...)\r
+{\r
+ va_list args;\r
+\r
+ va_start( args, format );\r
+ return tiny_print( 0, format, args, 0 );\r
+}\r
+\r
+int sprintf(char *out, const char *format, ...)\r
+{\r
+ va_list args;\r
+\r
+ va_start( args, format );\r
+ return tiny_print( &out, format, args, 0 );\r
+}\r
+\r
+\r
+int snprintf( char *buf, unsigned int count, const char *format, ... )\r
+{\r
+ va_list args;\r
+\r
+ ( void ) count;\r
+\r
+ va_start( args, format );\r
+ return tiny_print( &buf, format, args, count );\r
+}\r
+\r
+\r
+#ifdef TEST_PRINTF\r
+int main(void)\r
+{\r
+ char *ptr = "Hello world!";\r
+ char *np = 0;\r
+ int i = 5;\r
+ unsigned int bs = sizeof(int)*8;\r
+ int mi;\r
+ char buf[80];\r
+\r
+ mi = (1 << (bs-1)) + 1;\r
+ printf("%s\n", ptr);\r
+ printf("printf test\n");\r
+ printf("%s is null pointer\n", np);\r
+ printf("%d = 5\n", i);\r
+ printf("%d = - max int\n", mi);\r
+ printf("char %c = 'a'\n", 'a');\r
+ printf("hex %x = ff\n", 0xff);\r
+ printf("hex %02x = 00\n", 0);\r
+ printf("signed %d = unsigned %u = hex %x\n", -3, -3, -3);\r
+ printf("%d %s(s)%", 0, "message");\r
+ printf("\n");\r
+ printf("%d %s(s) with %%\n", 0, "message");\r
+ sprintf(buf, "justif: \"%-10s\"\n", "left"); printf("%s", buf);\r
+ sprintf(buf, "justif: \"%10s\"\n", "right"); printf("%s", buf);\r
+ sprintf(buf, " 3: %04d zero padded\n", 3); printf("%s", buf);\r
+ sprintf(buf, " 3: %-4d left justif.\n", 3); printf("%s", buf);\r
+ sprintf(buf, " 3: %4d right justif.\n", 3); printf("%s", buf);\r
+ sprintf(buf, "-3: %04d zero padded\n", -3); printf("%s", buf);\r
+ sprintf(buf, "-3: %-4d left justif.\n", -3); printf("%s", buf);\r
+ sprintf(buf, "-3: %4d right justif.\n", -3); printf("%s", buf);\r
+\r
+ return 0;\r
+}\r
+\r
+/*\r
+ * if you compile this file with\r
+ * gcc -Wall $(YOUR_C_OPTIONS) -DTEST_PRINTF -c printf.c\r
+ * you will get a normal warning:\r
+ * printf.c:214: warning: spurious trailing `%' in format\r
+ * this line is testing an invalid % at the end of the format string.\r
+ *\r
+ * this should display (on 32bit int machine) :\r
+ *\r
+ * Hello world!\r
+ * printf test\r
+ * (null) is null pointer\r
+ * 5 = 5\r
+ * -2147483647 = - max int\r
+ * char a = 'a'\r
+ * hex ff = ff\r
+ * hex 00 = 00\r
+ * signed -3 = unsigned 4294967293 = hex fffffffd\r
+ * 0 message(s)\r
+ * 0 message(s) with %\r
+ * justif: "left "\r
+ * justif: " right"\r
+ * 3: 0003 zero padded\r
+ * 3: 3 left justif.\r
+ * 3: 3 right justif.\r
+ * -3: -003 zero padded\r
+ * -3: -3 left justif.\r
+ * -3: -3 right justif.\r
+ */\r
+\r
+#endif\r
+\r
+\r
+/* To keep linker happy. */\r
+int write( int i, char* c, int n)\r
+{\r
+ (void)i;\r
+ (void)n;\r
+ (void)c;\r
+ return 0;\r
+}\r
+\r
projects / freertos / blobdiff