add printf functions, not fully implemented

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 193 insertions, 0 deletions

diff --git a/src/slibc-print.c b/src/slibc-print.c
new file mode 100644
index 0000000..f1ed817
--- /dev/null
+++ b/src/slibc-print.c
@@ -0,0 +1,193 @@
+/**
+ * slibc — Yet another C library
+ * Copyright © 2015  Mattias Andrée (maandree@member.fsf.org)
+ * 
+ * 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
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program 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 General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <slibc-print.h>
+#include <stdarg.h>
+
+
+
+/**
+ * An almost fully generic `printf`-function.
+ * 
+ * @param   write_function      Function used to write the string. `NULL` if
+ *                              it shall not be printed but only measured.
+ * @param   extension_function  Function used to extend the functions formatting codes.
+ *                              `NULL` if not extensions are to be used.
+ * @param   maximum_length      The maximum amount of bytes to write, including the
+ *                              NUL byte, ignored if `limited_length` is zero.
+ * @param   limited_length      Whether `maximum_length` shall be used.
+ * @param   actual_length       Output parameter for the length of the printed string,
+ *                              this includes any text that was truncated but not the
+ *                              NUL character. Must not be `NULL`.
+ * @param   terminate           Whether a NUL character shall be printed at the end.
+ * @param   data                Data to pass to `write_function` and
+ *                              `extension_function`, it should contain
+ *                              the print-sink, and any state data neccessary
+ *                              since the functions may be called multiple times.
+ * @param   format              The formatting-string, see `fprintf` for details.
+ * @param   ...                 The formatting-arguments.
+ * @return                      Zero on success, -1 on error. On error, `errno`
+ *                              is set to indicate the error.
+ * 
+ * @throws          Any error thrown by `write_function` or `extension_function`.
+ * @throws  EINVAL  `format` contained unsupported formatting codes.
+ */
+int generic_printf(generic_printf_write_func_t write_function, generic_printf_ext_func_t extension_function,
+		   size_t maximum_length, int limited_length, size_t* restrict actual_length, int terminate,
+		   void* data, const char* format, ...)
+{
+  int r;
+  va_list args;
+  va_start(args, format);
+  r = vgeneric_printf(write_function, extension_function, maximum_length,
+		      limited_length, actual_length, terminate, data, format, args);
+  va_end(args);
+  return r;
+}
+
+
+/**
+ * Variant of `generic_printf` that uses `va_list`
+ * instead of variadic arguments.
+ * 
+ * @param   write_function      Function used to write the string. `NULL` if
+ *                              it shall not be printed but only measured.
+ * @param   extension_function  Function used to extend the functions formatting codes.
+ *                              `NULL` if not extensions are to be used.
+ * @param   maximum_length      The maximum amount of bytes to write, including the
+ *                              NUL byte, ignored if `limited_length` is zero.
+ * @param   limited_length      Whether `maximum_length` shall be used.
+ * @param   actual_length       Output parameter for the length of the printed string,
+ *                              this includes any text that was truncated but not the
+ *                              NUL character. Must not be `NULL`.
+ * @param   terminate           Whether a NUL character shall be printed at the end.
+ * @param   data                Data to pass to `write_function` and
+ *                              `extension_function`, it should contain
+ *                              the print-sink, and any state data neccessary
+ *                              since the functions may be called multiple times.
+ * @param   format              The formatting-string, see `fprintf` for details.
+ * @param   args                The formatting-arguments.
+ * @return                      Zero on success, -1 on error. On error, `errno`
+ *                              is set to indicate the error.
+ * 
+ * @throws          Any error thrown by `write_function` or `extension_function`.
+ * @throws  EINVAL  `format` contained unsupported formatting codes.
+ */
+int vgeneric_printf(generic_printf_write_func_t write_function, generic_printf_ext_func_t extension_function,
+		    size_t maximum_length, int limited_length, size_t* restrict actual_length, int terminate,
+		    void* data, const char* format, va_list args)
+{
+  /* TODO vgeneric_printf */
+  return 0;
+  (void) write_function;
+  (void) extension_function;
+  (void) maximum_length;
+  (void) limited_length;
+  (void) actual_length;
+  (void) terminate;
+  (void) data;
+  (void) format;
+  (void) args;
+}
+
+
+/**
+ * Variant of `generic_printf` uses `wchar_t` instead of `char`;
+ * 
+ * @param   write_function      Function used to write the string. `NULL` if
+ *                              it shall not be printed but only measured.
+ * @param   extension_function  Function used to extend the functions formatting codes.
+ *                              `NULL` if not extensions are to be used.
+ * @param   maximum_length      The maximum amount of wide characters to write,
+ *                              including the NUL wide character, ignored if
+ *                              `limited_length` is zero.
+ * @param   limited_length      Whether `maximum_length` shall be used.
+ * @param   actual_length       Output parameter for the length of the printed string,
+ *                              this includes any text that was truncated but not the
+ *                              NUL character. Must not be `NULL`.
+ * @param   terminate           Whether a NUL character shall be printed at the end.
+ * @param   data                Data to pass to `write_function` and
+ *                              `extension_function`, it should contain
+ *                              the print-sink, and any state data neccessary
+ *                              since the functions may be called multiple times.
+ * @param   format              The formatting-string, see `fprintf` for details.
+ * @param   ...                 The formatting-arguments.
+ * @return                      Zero on success, -1 on error. On error, `errno`
+ *                              is set to indicate the error.
+ * 
+ * @throws          Any error thrown by `write_function` or `extension_function`.
+ * @throws  EINVAL  `format` contained unsupported formatting codes.
+ */
+int generic_wprintf(generic_wprintf_write_func_t write_function, generic_wprintf_ext_func_t extension_function,
+		    size_t maximum_length, int limited_length, size_t* restrict actual_length, int terminate,
+		    void* data, const wchar_t* format, ...)
+{
+  int r;
+  va_list args;
+  va_start(args, format);
+  r = vgeneric_wprintf(write_function, extension_function, maximum_length,
+		       limited_length, actual_length, terminate, data, format, args);
+  va_end(args);
+  return r;
+}
+
+
+/**
+ * Variant of `generic_wprintf` that uses `va_list`
+ * instead of variadic arguments.
+ * 
+ * @param   write_function      Function used to write the string. `NULL` if
+ *                              it shall not be printed but only measured.
+ * @param   extension_function  Function used to extend the functions formatting codes.
+ *                              `NULL` if not extensions are to be used.
+ * @param   maximum_length      The maximum amount of wide characters to write,
+ *                              including the NUL wide character, ignored if
+ *                              `limited_length` is zero.
+ * @param   limited_length      Whether `maximum_length` shall be used.
+ * @param   actual_length       Output parameter for the length of the printed string,
+ *                              this includes any text that was truncated but not the
+ *                              NUL character. Must not be `NULL`.
+ * @param   terminate           Whether a NUL character shall be printed at the end.
+ * @param   data                Data to pass to `write_function` and
+ *                              `extension_function`, it should contain
+ *                              the print-sink, and any state data neccessary
+ *                              since the functions may be called multiple times.
+ * @param   format              The formatting-string, see `fprintf` for details.
+ * @param   ...                 The formatting-arguments.
+ * @return                      Zero on success, -1 on error. On error, `errno`
+ *                              is set to indicate the error.
+ * 
+ * @throws          Any error thrown by `write_function` or `extension_function`.
+ * @throws  EINVAL  `format` contained unsupported formatting codes.
+ */
+int vgeneric_wprintf(generic_wprintf_write_func_t write_function, generic_wprintf_ext_func_t extension_function,
+		     size_t maximum_length, int limited_length, size_t* restrict actual_length, int terminate,
+		     void* data, const wchar_t* format, va_list args)
+{
+  /* TODO vgeneric_wprintf */
+  return 0;
+  (void) write_function;
+  (void) extension_function;
+  (void) maximum_length;
+  (void) limited_length;
+  (void) actual_length;
+  (void) terminate;
+  (void) data;
+  (void) format;
+  (void) args;
+}
+