diff options
Diffstat (limited to 'tinyprintf')
| -rw-r--r-- | tinyprintf/LICENSE.BSD-new | 24 | ||||
| -rw-r--r-- | tinyprintf/LICENSE.LGPL-2.1 | 502 | ||||
| -rw-r--r-- | tinyprintf/Makefile | 39 | ||||
| -rw-r--r-- | tinyprintf/README | 6 | ||||
| -rw-r--r-- | tinyprintf/test/printf.c | 69 | ||||
| -rw-r--r-- | tinyprintf/test/sprintf.c | 80 | ||||
| -rw-r--r-- | tinyprintf/tinyprintf.c | 521 | ||||
| -rw-r--r-- | tinyprintf/tinyprintf.h | 186 |
8 files changed, 1427 insertions, 0 deletions
diff --git a/tinyprintf/LICENSE.BSD-new b/tinyprintf/LICENSE.BSD-new new file mode 100644 index 0000000..c088c77 --- /dev/null +++ b/tinyprintf/LICENSE.BSD-new @@ -0,0 +1,24 @@ +Copyright (c) 2004,2012 Kustaa Nyholm / SpareTimeLabs +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + * Neither the name of Kustaa Nyholm or SpareTimeLabs nor the + names of its contributors may be used to endorse or promote products + derived from this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. 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Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the + library `Frob' (a library for tweaking knobs) written by James Random Hacker. + + <signature of Ty Coon>, 1 April 1990 + Ty Coon, President of Vice + +That's all there is to it! diff --git a/tinyprintf/Makefile b/tinyprintf/Makefile new file mode 100644 index 0000000..43adc13 --- /dev/null +++ b/tinyprintf/Makefile @@ -0,0 +1,39 @@ + +CPPFLAGS+=-I. +CFLAGS+=-Wall -W -Wextra -O3 -g +# RUNNER:=valgrind + +.PHONY: all test tests compiletests runtests clean + +all: tests + +test tests: compiletests runtests + +runtests: test/printf test/sprintf + set -x ; for prg in $^ ; do $(RUNNER) $$prg || exit $$? ; done + +compiletests: + $(COMPILE.c) \ + -DTINYPRINTF_DEFINE_TFP_PRINTF=0 \ + -DTINYPRINTF_DEFINE_TFP_SPRINTF=0 \ + -DTINYPRINTF_OVERRIDE_LIBC=0 \ + -o tinyprintf_minimal.o tinyprintf.c + $(COMPILE.c) \ + -DTINYPRINTF_DEFINE_TFP_PRINTF=1 \ + -DTINYPRINTF_DEFINE_TFP_SPRINTF=0 \ + -DTINYPRINTF_OVERRIDE_LIBC=0 \ + -o tinyprintf_only_tfp_printf.o tinyprintf.c + $(COMPILE.c) \ + -DTINYPRINTF_DEFINE_TFP_PRINTF=0 \ + -DTINYPRINTF_DEFINE_TFP_SPRINTF=1 \ + -DTINYPRINTF_OVERRIDE_LIBC=0 \ + -o tinyprintf_only_tfp_sprintf.o tinyprintf.c + +test/printf: test/printf.o tinyprintf.o + $(LINK.c) -o $@ $^ + +test/sprintf: test/sprintf.o tinyprintf.o + $(LINK.c) -o $@ $^ + +clean: + $(RM) *.o test/*.o *~ test/*~ test/printf test/sprintf diff --git a/tinyprintf/README b/tinyprintf/README new file mode 100644 index 0000000..64f27e5 --- /dev/null +++ b/tinyprintf/README @@ -0,0 +1,6 @@ +tinyprintf originally from http://www.sparetimelabs.com/tinyprintf/index.html +Copyright (C) 2004,2012 Kustaa Nyholm +Licenses: LGPL 2.1 or later (see LICENSE.LGPL-2.1) + or BSD-new (see LICENSE.BSD-new) + +"You are free to use the LGPL license [...] or the BSD license" diff --git a/tinyprintf/test/printf.c b/tinyprintf/test/printf.c new file mode 100644 index 0000000..dd84a9b --- /dev/null +++ b/tinyprintf/test/printf.c @@ -0,0 +1,69 @@ + +#define TINYPRINTF_DEFINE_TFP_PRINTF 1 +#define TINYPRINTF_DEFINE_TFP_SPRINTF 0 +#define TINYPRINTF_OVERRIDE_LIBC 0 + +#include <stdio.h> +#include <string.h> +#include <limits.h> + +#include "tinyprintf.h" + +/* Clear unused warnings for actually unused variables */ +#define UNUSED(x) (void)(x) + +#define TPRINTF(expr...) \ + ({ printf("libc_printf(%s) -> ", #expr); printf(expr); \ + printf(" tfp_printf(%s) -> ", #expr); tfp_printf(expr); }) + +static void stdout_putf(void *unused, char c) +{ + UNUSED(unused); + putchar(c); +} + +int main() +{ + init_printf(NULL, stdout_putf); + + printf("Fun with printf and %%!\n"); + + TPRINTF("d1=%016llx d2=%016lx d3=%02x d4=%02X 42=%03d\n", + (long long unsigned)0xd1, (long unsigned)0xd2, 0xd3, 0xd4, 42); + TPRINTF("d1=%04x d2=%06x d3=%08x %%100\n", 0xd1, 0xd2, 0xd3); + TPRINTF("|%-14s| |%-16s| d2=%2x |%-30s|\n", "str14", "str16", 0xd2, + "12345678901234567890123456789012345"); + TPRINTF("|%4s|\n", "string4"); + TPRINTF("|%-4s|\n", "string4"); + TPRINTF("42=%3d d1=%4.4x |%4s| d2=%8.8x\n", 42, 0xd1, "string4", 0xd2); + TPRINTF("42=%3d d1=%4.4x |%-4s| d2=%8.8x\n", 42, 0xd1, "string4", 0xd2); + TPRINTF("84=%d 21=%ds |%s| |%sOK| d1=%x d2=%#x\n", + 84, 21, "hello", "fine", 0xd1, 0xd2); + + TPRINTF("%lld\n", LLONG_MIN); + TPRINTF("%lld\n", LLONG_MAX); + TPRINTF("%llu\n", ULLONG_MAX); + TPRINTF("%llx\n", LLONG_MIN); + TPRINTF("%llx\n", LLONG_MAX); + TPRINTF("%llx\n", ULLONG_MAX); + + TPRINTF("d1=%.1x\n", 0xd1); + TPRINTF("d1=%4.1x\n", 0xd1); + TPRINTF("d1=%4.x\n", 0xd1); + + { + char blah[256]; + TPRINTF("a=%zd\n", sizeof(blah)); + TPRINTF("a=%zu\n", sizeof(blah)); + TPRINTF("a=%zi\n", sizeof(blah)); + TPRINTF("a=0x%zx\n", sizeof(blah)); + } + + { + int in_stack; + TPRINTF("Adddress of main: %p\n", main); + TPRINTF("Adddress of stack variable: %p\n", &in_stack); + } + + return 0; +} diff --git a/tinyprintf/test/sprintf.c b/tinyprintf/test/sprintf.c new file mode 100644 index 0000000..06a01ed --- /dev/null +++ b/tinyprintf/test/sprintf.c @@ -0,0 +1,80 @@ + +#define TINYPRINTF_DEFINE_TFP_PRINTF 0 +#define TINYPRINTF_DEFINE_TFP_SPRINTF 1 +#define TINYPRINTF_OVERRIDE_LIBC 0 + +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <assert.h> +#include <limits.h> + +#include "tinyprintf.h" + +/* Use malloc so that valgrind can catch array overflows */ +#define TPRINTF(expr...) \ + ({ char *s1, *s2; size_t sz1, sz2; \ + /* Test format ok */ \ + s1 = malloc(1024); s2 = malloc(1024); \ + sz1 = snprintf(s1, 1024, expr); sz2 = tfp_snprintf(s2, 256, expr); \ + printf("libc_snprintf(%s) -> %d: ", #expr, (int)sz1); puts(s1); \ + printf(" tfp_snprintf(%s) -> %d: ", #expr, (int)sz2); puts(s2); \ + assert(sz1 == sz2); \ + assert(0 == strcmp(s1, s2)); \ + /* Test no array verflow */ \ + free(s1); free(s2); s1 = malloc(1); s2 = malloc(1); \ + assert(snprintf(s1, 1, expr) == tfp_snprintf(s2, 1, expr)); \ + assert(strlen(s1) == 0); assert(strlen(s2) == 0); \ + assert(0 == strcmp(s1, s2)); \ + /* Test correct truncation */ \ + free(s1); free(s2); s1 = malloc(16); s2 = malloc(16); \ + assert(snprintf(s1, 16, expr) == tfp_snprintf(s2, 16, expr)); \ + assert(strlen(s1) < 16); assert(strlen(s2) < 16); \ + assert(0 == strcmp(s1, s2)); \ + free(s1); free(s2); \ + }) + + +int main() +{ + printf("Fun with sprintf and %%!\n"); + + TPRINTF("d1=%016llx d2=%016lx d3=%02x d4=%02X 42=%03d", + (long long unsigned)0xd1, (long unsigned)0xd2, 0xd3, 0xd4, 42); + TPRINTF("d1=%04x d2=%06x d3=%08x %%100", 0xd1, 0xd2, 0xd3); + TPRINTF("|%-14s| |%-16s| d2=%2x |%-30s|", "str14", "str16", 0xd2, + "12345678901234567890123456789012345"); + TPRINTF("|%4s|", "string4"); + TPRINTF("|%-4s|", "string4"); + TPRINTF("42=%3d d1=%4.4x |%4s| d2=%8.8x", 42, 0xd1, "string4", 0xd2); + TPRINTF("42=%3d d1=%4.4x |%-4s| d2=%8.8x", 42, 0xd1, "string4", 0xd2); + TPRINTF("84=%d 21=%ds |%s| |%sOK| d1=%x d2=%#x", + 84, 21, "hello", "fine", 0xd1, 0xd2); + + TPRINTF("%lld", LLONG_MIN); + TPRINTF("%lld", LLONG_MAX); + TPRINTF("%llu", ULLONG_MAX); + TPRINTF("%llx", LLONG_MIN); + TPRINTF("%llx", LLONG_MAX); + TPRINTF("%llx", ULLONG_MAX); + + TPRINTF("d1=%4.4x", 0xd1); + + { + char blah[256]; + TPRINTF("a=%zd", sizeof(blah)); + TPRINTF("a=%zu", sizeof(blah)); + TPRINTF("a=%zi", sizeof(blah)); + TPRINTF("a=0x%zx", sizeof(blah)); + } + + TPRINTF("Hello |%15s|.", "12345678901234"); + + { + int in_stack; + TPRINTF("Adddress of main: %p", main); + TPRINTF("Adddress of stack variable: %p", &in_stack); + } + + return 0; +} diff --git a/tinyprintf/tinyprintf.c b/tinyprintf/tinyprintf.c new file mode 100644 index 0000000..42d05b0 --- /dev/null +++ b/tinyprintf/tinyprintf.c @@ -0,0 +1,521 @@ +/* +File: tinyprintf.c + +Copyright (C) 2004 Kustaa Nyholm + +This library is free software; you can redistribute it and/or +modify it under the terms of the GNU Lesser General Public +License as published by the Free Software Foundation; either +version 2.1 of the License, or (at your option) any later version. + +This library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public +License along with this library; if not, write to the Free Software +Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + +*/ + +#include "tinyprintf.h" + + +/* + * Configuration + */ + +/* Enable long int support */ +#define PRINTF_LONG_SUPPORT + +/* Enable long long int support (implies long int support) */ +//#define PRINTF_LONG_LONG_SUPPORT + +/* Enable %z (size_t) support */ +#define PRINTF_SIZE_T_SUPPORT + +/* + * Configuration adjustments + */ +#ifdef PRINTF_SIZE_T_SUPPORT +#include <sys/types.h> +#endif + +#ifdef PRINTF_LONG_LONG_SUPPORT +# define PRINTF_LONG_SUPPORT +#endif + +/* __SIZEOF_<type>__ defined at least by gcc */ +#ifdef __SIZEOF_POINTER__ +# define SIZEOF_POINTER __SIZEOF_POINTER__ +#endif +#ifdef __SIZEOF_LONG_LONG__ +# define SIZEOF_LONG_LONG __SIZEOF_LONG_LONG__ +#endif +#ifdef __SIZEOF_LONG__ +# define SIZEOF_LONG __SIZEOF_LONG__ +#endif +#ifdef __SIZEOF_INT__ +# define SIZEOF_INT __SIZEOF_INT__ +#endif + +#ifdef __GNUC__ +# define _TFP_GCC_NO_INLINE_ __attribute__ ((noinline)) +#else +# define _TFP_GCC_NO_INLINE_ +#endif + +/* + * Implementation + */ +struct param { + char lz:1; /**< Leading zeros */ + char alt:1; /**< alternate form */ + char uc:1; /**< Upper case (for base16 only) */ + char align_left:1; /**< 0 == align right (default), 1 == align left */ + unsigned int width; /**< field width */ + char sign; /**< The sign to display (if any) */ + unsigned int base; /**< number base (e.g.: 8, 10, 16) */ + char *bf; /**< Buffer to output */ +}; + + +#ifdef PRINTF_LONG_LONG_SUPPORT +static void _TFP_GCC_NO_INLINE_ ulli2a( + unsigned long long int num, struct param *p) +{ + int n = 0; + unsigned long long int d = 1; + char *bf = p->bf; + while (num / d >= p->base) + d *= p->base; + while (d != 0) { + int dgt = num / d; + num %= d; + d /= p->base; + if (n || dgt > 0 || d == 0) { + *bf++ = dgt + (dgt < 10 ? '0' : (p->uc ? 'A' : 'a') - 10); + ++n; + } + } + *bf = 0; +} + +static void lli2a(long long int num, struct param *p) +{ + if (num < 0) { + num = -num; + p->sign = '-'; + } + ulli2a(num, p); +} +#endif + +#ifdef PRINTF_LONG_SUPPORT +static void uli2a(unsigned long int num, struct param *p) +{ + int n = 0; + unsigned long int d = 1; + char *bf = p->bf; + while (num / d >= p->base) + d *= p->base; + while (d != 0) { + int dgt = num / d; + num %= d; + d /= p->base; + if (n || dgt > 0 || d == 0) { + *bf++ = dgt + (dgt < 10 ? '0' : (p->uc ? 'A' : 'a') - 10); + ++n; + } + } + *bf = 0; +} + +static void li2a(long num, struct param *p) +{ + if (num < 0) { + num = -num; + p->sign = '-'; + } + uli2a(num, p); +} +#endif + +static void ui2a(unsigned int num, struct param *p) +{ + int n = 0; + unsigned int d = 1; + char *bf = p->bf; + while (num / d >= p->base) + d *= p->base; + while (d != 0) { + int dgt = num / d; + num %= d; + d /= p->base; + if (n || dgt > 0 || d == 0) { + *bf++ = dgt + (dgt < 10 ? '0' : (p->uc ? 'A' : 'a') - 10); + ++n; + } + } + *bf = 0; +} + +static void i2a(int num, struct param *p) +{ + if (num < 0) { + num = -num; + p->sign = '-'; + } + ui2a(num, p); +} + +static int a2d(char ch) +{ + if (ch >= '0' && ch <= '9') + return ch - '0'; + else if (ch >= 'a' && ch <= 'f') + return ch - 'a' + 10; + else if (ch >= 'A' && ch <= 'F') + return ch - 'A' + 10; + else + return -1; +} + +static char a2u(char ch, const char **src, int base, unsigned int *nump) +{ + const char *p = *src; + unsigned int num = 0; + int digit; + while ((digit = a2d(ch)) >= 0) { + if (digit > base) + break; + num = num * base + digit; + ch = *p++; + } + *src = p; + *nump = num; + return ch; +} + +static void putchw(void *putp, putcf putf, struct param *p) +{ + char ch; + int n = p->width; + char *bf = p->bf; + + /* Number of filling characters */ + while (*bf++ && n > 0) + n--; + if (p->sign) + n--; + if (p->alt && p->base == 16) + n -= 2; + else if (p->alt && p->base == 8) + n--; + + /* Fill with space to align to the right, before alternate or sign */ + if (!p->lz && !p->align_left) { + while (n-- > 0) + putf(putp, ' '); + } + + /* print sign */ + if (p->sign) + putf(putp, p->sign); + + /* Alternate */ + if (p->alt && p->base == 16) { + putf(putp, '0'); + putf(putp, (p->uc ? 'X' : 'x')); + } else if (p->alt && p->base == 8) { + putf(putp, '0'); + } + + /* Fill with zeros, after alternate or sign */ + if (p->lz) { + while (n-- > 0) + putf(putp, '0'); + } + + /* Put actual buffer */ + bf = p->bf; + while ((ch = *bf++)) + putf(putp, ch); + + /* Fill with space to align to the left, after string */ + if (!p->lz && p->align_left) { + while (n-- > 0) + putf(putp, ' '); + } +} + +void tfp_format(void *putp, putcf putf, const char *fmt, va_list va) +{ + struct param p; +#ifdef PRINTF_LONG_SUPPORT + char bf[23]; /* long = 64b on some architectures */ +#else + char bf[12]; /* int = 32b on some architectures */ +#endif + char ch; + p.bf = bf; + + while ((ch = *(fmt++))) { + if (ch != '%') { + putf(putp, ch); + } else { +#ifdef PRINTF_LONG_SUPPORT + char lng = 0; /* 1 for long, 2 for long long */ +#endif + /* Init parameter struct */ + p.lz = 0; + p.alt = 0; + p.width = 0; + p.align_left = 0; + p.sign = 0; + + /* Flags */ + while ((ch = *(fmt++))) { + switch (ch) { + case '-': + p.align_left = 1; + continue; + case '0': + p.lz = 1; + continue; + case '#': + p.alt = 1; + continue; + default: + break; + } + break; + } + + /* Width */ + if (ch >= '0' && ch <= '9') { + ch = a2u(ch, &fmt, 10, &(p.width)); + } + + /* We accept 'x.y' format but don't support it completely: + * we ignore the 'y' digit => this ignores 0-fill + * size and makes it == width (ie. 'x') */ + if (ch == '.') { + p.lz = 1; /* zero-padding */ + /* ignore actual 0-fill size: */ + do { + ch = *(fmt++); + } while ((ch >= '0') && (ch <= '9')); + } + +#ifdef PRINTF_SIZE_T_SUPPORT +# ifdef PRINTF_LONG_SUPPORT + if (ch == 'z') { + ch = *(fmt++); + if (sizeof(size_t) == sizeof(unsigned long int)) + lng = 1; +# ifdef PRINTF_LONG_LONG_SUPPORT + else if (sizeof(size_t) == sizeof(unsigned long long int)) + lng = 2; +# endif + } else +# endif +#endif + +#ifdef PRINTF_LONG_SUPPORT + if (ch == 'l') { + ch = *(fmt++); + lng = 1; +#ifdef PRINTF_LONG_LONG_SUPPORT + if (ch == 'l') { + ch = *(fmt++); + lng = 2; + } +#endif + } +#endif + switch (ch) { + case 0: + goto abort; + case 'u': + p.base = 10; +#ifdef PRINTF_LONG_SUPPORT +#ifdef PRINTF_LONG_LONG_SUPPORT + if (2 == lng) + ulli2a(va_arg(va, unsigned long long int), &p); + else +#endif + if (1 == lng) + uli2a(va_arg(va, unsigned long int), &p); + else +#endif + ui2a(va_arg(va, unsigned int), &p); + putchw(putp, putf, &p); + break; + case 'd': + case 'i': + p.base = 10; +#ifdef PRINTF_LONG_SUPPORT +#ifdef PRINTF_LONG_LONG_SUPPORT + if (2 == lng) + lli2a(va_arg(va, long long int), &p); + else +#endif + if (1 == lng) + li2a(va_arg(va, long int), &p); + else +#endif + i2a(va_arg(va, int), &p); + putchw(putp, putf, &p); + break; +#ifdef SIZEOF_POINTER + case 'p': + p.alt = 1; +# if defined(SIZEOF_INT) && SIZEOF_POINTER <= SIZEOF_INT + lng = 0; +# elif defined(SIZEOF_LONG) && SIZEOF_POINTER <= SIZEOF_LONG + lng = 1; +# elif defined(SIZEOF_LONG_LONG) && SIZEOF_POINTER <= SIZEOF_LONG_LONG + lng = 2; +# endif +#endif + case 'x': + case 'X': + p.base = 16; + p.uc = (ch == 'X')?1:0; +#ifdef PRINTF_LONG_SUPPORT +#ifdef PRINTF_LONG_LONG_SUPPORT + if (2 == lng) + ulli2a(va_arg(va, unsigned long long int), &p); + else +#endif + if (1 == lng) + uli2a(va_arg(va, unsigned long int), &p); + else +#endif + ui2a(va_arg(va, unsigned int), &p); + putchw(putp, putf, &p); + break; + case 'o': + p.base = 8; + ui2a(va_arg(va, unsigned int), &p); + putchw(putp, putf, &p); + break; + case 'c': + putf(putp, (char)(va_arg(va, int))); + break; + case 's': + p.bf = va_arg(va, char *); + putchw(putp, putf, &p); + p.bf = bf; + break; + case '%': + putf(putp, ch); + default: + break; + } + } + } + abort:; +} + +#if TINYPRINTF_DEFINE_TFP_PRINTF +static putcf stdout_putf; +static void *stdout_putp; + +void init_printf(void *putp, putcf putf) +{ + stdout_putf = putf; + stdout_putp = putp; +} + +void tfp_printf(const char *fmt, ...) +{ + va_list va; + va_start(va, fmt); + tfp_format(stdout_putp, stdout_putf, fmt, va); + va_end(va); +} +#endif + +#if TINYPRINTF_DEFINE_TFP_SPRINTF +struct _vsnprintf_putcf_data +{ + size_t dest_capacity; + char *dest; + size_t num_chars; +}; + +static void _vsnprintf_putcf(void *p, char c) +{ + struct _vsnprintf_putcf_data *data = (struct _vsnprintf_putcf_data*)p; + if (data->num_chars < data->dest_capacity) + data->dest[data->num_chars] = c; + data->num_chars ++; +} + +int tfp_vsnprintf(char *str, size_t size, const char *format, va_list ap) +{ + struct _vsnprintf_putcf_data data; + + if (size < 1) + return 0; + + data.dest = str; + data.dest_capacity = size-1; + data.num_chars = 0; + tfp_format(&data, _vsnprintf_putcf, format, ap); + + if (data.num_chars < data.dest_capacity) + data.dest[data.num_chars] = '\0'; + else + data.dest[data.dest_capacity] = '\0'; + + return data.num_chars; +} + +int tfp_snprintf(char *str, size_t size, const char *format, ...) +{ + va_list ap; + int retval; + + va_start(ap, format); + retval = tfp_vsnprintf(str, size, format, ap); + va_end(ap); + return retval; +} + +struct _vsprintf_putcf_data +{ + char *dest; + size_t num_chars; +}; + +static void _vsprintf_putcf(void *p, char c) +{ + struct _vsprintf_putcf_data *data = (struct _vsprintf_putcf_data*)p; + data->dest[data->num_chars++] = c; +} + +int tfp_vsprintf(char *str, const char *format, va_list ap) +{ + struct _vsprintf_putcf_data data; + data.dest = str; + data.num_chars = 0; + tfp_format(&data, _vsprintf_putcf, format, ap); + data.dest[data.num_chars] = '\0'; + return data.num_chars; +} + +int tfp_sprintf(char *str, const char *format, ...) +{ + va_list ap; + int retval; + + va_start(ap, format); + retval = tfp_vsprintf(str, format, ap); + va_end(ap); + return retval; +} +#endif diff --git a/tinyprintf/tinyprintf.h b/tinyprintf/tinyprintf.h new file mode 100644 index 0000000..7ba9595 --- /dev/null +++ b/tinyprintf/tinyprintf.h @@ -0,0 +1,186 @@ +/* +File: tinyprintf.h + +Copyright (C) 2004 Kustaa Nyholm + +This library is free software; you can redistribute it and/or +modify it under the terms of the GNU Lesser General Public +License as published by the Free Software Foundation; either +version 2.1 of the License, or (at your option) any later version. + +This library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public +License along with this library; if not, write to the Free Software +Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + +This library is really just two files: 'tinyprintf.h' and 'tinyprintf.c'. + +They provide a simple and small (+400 loc) printf functionality to +be used in embedded systems. + +I've found them so useful in debugging that I do not bother with a +debugger at all. + +They are distributed in source form, so to use them, just compile them +into your project. + +Two printf variants are provided: printf and the 'sprintf' family of +functions ('snprintf', 'sprintf', 'vsnprintf', 'vsprintf'). + +The formats supported by this implementation are: +'c' 'd' 'i' 'o' 'p' 'u' 's' 'x' 'X'. + +Zero padding and field width are also supported. + +If the library is compiled with 'PRINTF_SUPPORT_LONG' defined, then +the long specifier is also supported. Note that this will pull in some +long math routines (pun intended!) and thus make your executable +noticeably longer. Likewise with 'PRINTF_LONG_LONG_SUPPORT' for the +long long specifier, and with 'PRINTF_SIZE_T_SUPPORT' for the size_t +specifier. + +The memory footprint of course depends on the target CPU, compiler and +compiler options, but a rough guesstimate (based on a H8S target) is about +1.4 kB for code and some twenty 'int's and 'char's, say 60 bytes of stack space. +Not too bad. Your mileage may vary. By hacking the source code you can +get rid of some hundred bytes, I'm sure, but personally I feel the balance of +functionality and flexibility versus code size is close to optimal for +many embedded systems. + +To use the printf, you need to supply your own character output function, +something like : + +void putc ( void* p, char c) +{ + while (!SERIAL_PORT_EMPTY) ; + SERIAL_PORT_TX_REGISTER = c; +} + +Before you can call printf, you need to initialize it to use your +character output function with something like: + +init_printf(NULL,putc); + +Notice the 'NULL' in 'init_printf' and the parameter 'void* p' in 'putc', +the NULL (or any pointer) you pass into the 'init_printf' will eventually be +passed to your 'putc' routine. This allows you to pass some storage space (or +anything really) to the character output function, if necessary. +This is not often needed but it was implemented like that because it made +implementing the sprintf function so neat (look at the source code). + +The code is re-entrant, except for the 'init_printf' function, so it is safe +to call it from interrupts too, although this may result in mixed output. +If you rely on re-entrancy, take care that your 'putc' function is re-entrant! + +The printf and sprintf functions are actually macros that translate to +'tfp_printf' and 'tfp_sprintf' when 'TINYPRINTF_OVERRIDE_LIBC' is set +(default). Setting it to 0 makes it possible to use them along with +'stdio.h' printf's in a single source file. When +'TINYPRINTF_OVERRIDE_LIBC' is set, please note that printf/sprintf are +not function-like macros, so if you have variables or struct members +with these names, things will explode in your face. Without variadic +macros this is the best we can do to wrap these function. If it is a +problem, just give up the macros and use the functions directly, or +rename them. + +It is also possible to avoid defining tfp_printf and/or tfp_sprintf by +clearing 'TINYPRINTF_DEFINE_TFP_PRINTF' and/or +'TINYPRINTF_DEFINE_TFP_SPRINTF' to 0. This allows for example to +export only tfp_format, which is at the core of all the other +functions. + +For further details see source code. + +regs Kusti, 23.10.2004 +*/ + +#ifndef __TFP_PRINTF__ +#define __TFP_PRINTF__ + +#include <stdarg.h> + +/* Global configuration */ + +/* Set this to 0 if you do not want to provide tfp_printf */ +#ifndef TINYPRINTF_DEFINE_TFP_PRINTF +# define TINYPRINTF_DEFINE_TFP_PRINTF 1 +#endif + +/* Set this to 0 if you do not want to provide + tfp_sprintf/snprintf/vsprintf/vsnprintf */ +#ifndef TINYPRINTF_DEFINE_TFP_SPRINTF +# define TINYPRINTF_DEFINE_TFP_SPRINTF 1 +#endif + +/* Set this to 0 if you do not want tfp_printf and + tfp_{vsn,sn,vs,s}printf to be also available as + printf/{vsn,sn,vs,s}printf */ +#ifndef TINYPRINTF_OVERRIDE_LIBC +# define TINYPRINTF_OVERRIDE_LIBC 1 +#endif + +/* Optional external types dependencies */ + +#if TINYPRINTF_DEFINE_TFP_SPRINTF +# include <sys/types.h> /* size_t */ +#endif + +/* Declarations */ + +#ifdef __GNUC__ +# define _TFP_SPECIFY_PRINTF_FMT(fmt_idx,arg1_idx) \ + __attribute__((format (printf, fmt_idx, arg1_idx))) +#else +# define _TFP_SPECIFY_PRINTF_FMT(fmt_idx,arg1_idx) +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +typedef void (*putcf) (void *, char); + +/* + 'tfp_format' really is the central function for all tinyprintf. For + each output character after formatting, the 'putf' callback is + called with 2 args: + - an arbitrary void* 'putp' param defined by the user and + passed unmodified from 'tfp_format', + - the character. + The 'tfp_printf' and 'tfp_sprintf' functions simply define their own + callback and pass to it the right 'putp' it is expecting. +*/ +void tfp_format(void *putp, putcf putf, const char *fmt, va_list va); + +#if TINYPRINTF_DEFINE_TFP_SPRINTF +int tfp_vsnprintf(char *str, size_t size, const char *fmt, va_list ap); +int tfp_snprintf(char *str, size_t size, const char *fmt, ...) \ + _TFP_SPECIFY_PRINTF_FMT(3, 4); +int tfp_vsprintf(char *str, const char *fmt, va_list ap); +int tfp_sprintf(char *str, const char *fmt, ...) \ + _TFP_SPECIFY_PRINTF_FMT(2, 3); +# if TINYPRINTF_OVERRIDE_LIBC +# define vsnprintf tfp_vsnprintf +# define snprintf tfp_snprintf +# define vsprintf tfp_vsprintf +# define sprintf tfp_sprintf +# endif +#endif + +#if TINYPRINTF_DEFINE_TFP_PRINTF +void init_printf(void *putp, putcf putf); +void tfp_printf(const char *fmt, ...) _TFP_SPECIFY_PRINTF_FMT(1, 2); +# if TINYPRINTF_OVERRIDE_LIBC +# define printf tfp_printf +# endif +#endif + +#ifdef __cplusplus +} +#endif + +#endif |