Changeset 63088cc1 in mainline

Timestamp:

2008-12-29T13:30:19Z (15 years ago)

Author:

Jiri Svoboda <jirik.svoboda@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

1c1002a

Parents:

04b687b

Message:

fgetc(), fputc(), fputs(), fseek().

Location:

uspace

Files:

• app/tester/stdio/stdio1.c (modified) (2 diffs)
• lib/libc/generic/io/stdio.c (modified) (1 diff)
• lib/libc/include/stdio.h (modified) (1 diff)
• lib/libc/include/unistd.h (modified) (1 diff)

uspace/app/tester/stdio/stdio1.c

@@ -40 +40 @@
         char *file_name = "/readme";
         size_t n;
+        int c;
 
         printf("Open file '%s'\n", file_name);
@@ -61 +62 @@
         printf("Read string '%s'.\n", buf);
 
-        fclose(f);
+        printf("Seek to beginning.\n");
+        if (fseek(f, 0, SEEK_SET) != 0) {
+                fclose(f);
+                return "Failed seeking.";
+        }
+
+        printf("Read using fgetc().\n");
+        while (true) {
+                c = fgetc(f);
+                if (c == EOF) break;
+
+                printf("'%c'", c);
+        }
+
+        printf("[EOF]\n");
+        printf("Closing.\n");
+
+        if (fclose(f) != 0)
+                return "Failed closing.";
 
         return NULL;

uspace/lib/libc/generic/io/stdio.c

@@ -216 +216 @@
 }
 
+/** Read character from a stream. */
+int fgetc(FILE *f)
+{
+        unsigned char c;
+        size_t n;
+
+        n = fread(&c, sizeof(c), 1, f);
+        if (n < 1) return EOF;
+
+        return (int) c;
+}
+
+/** Write character to a stream. */
+int fputc(int c, FILE *f)
+{
+        unsigned char cc;
+        size_t n;
+
+        cc = (unsigned char) c;
+        n = fwrite(&cc, sizeof(cc), 1, f);
+        if (n < 1) return EOF;
+
+        return (int) cc;
+}
+
+/** Write string to a stream. */
+int fputs(const char *s, FILE *f)
+{
+        int rc;
+
+        rc = 0;
+
+        while (*s && rc >= 0) {
+                rc = fputc(*s++, f);
+        }
+
+        if (rc < 0) return EOF;
+
+        return 0;
+}
+
+/** Seek to position in stream. */
+int fseek(FILE *f, long offset, int origin)
+{
+        off_t rc;
+
+        rc = lseek(f->fd, offset, origin);
+        if (rc == (off_t) (-1)) {
+                /* errno has been set by lseek. */
+                return -1;
+        }
+
+        f->eof = 0;
+
+        return 0;
+}
+
 /** @}
  */

uspace/lib/libc/include/stdio.h

@@ -90 +90 @@
 extern void clearerr(FILE *);
 
+extern int fgetc(FILE *);;
+extern int fputc(int, FILE *);
+extern int fputs(const char *, FILE *);
+
+#define getc fgetc
+#define putc fputc
+
+extern int fseek(FILE *, long, int);
+
+#ifndef SEEK_SET
+        #define SEEK_SET        0
+        #define SEEK_CUR        1
+        #define SEEK_END        2
+#endif
+
 #endif
 

uspace/lib/libc/include/unistd.h

@@ -45 +45 @@
 #define getpagesize()     (PAGE_SIZE)
 
-#define SEEK_SET        0
-#define SEEK_CUR        1
-#define SEEK_END        2
+#ifndef SEEK_SET
+        #define SEEK_SET        0
+        #define SEEK_CUR        1
+        #define SEEK_END        2
+#endif
 
 extern ssize_t write(int, const void *, size_t);