scc

simple C compiler
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commit ce4378b51b24fbceed1bf8308dac1df7ded3aa59
parent a891448dfebfde12ae05c961bb2337d76e72a643
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Mon,  4 Dec 2017 19:12:11 +0100

[lib/c] Add fread() and fwrite()

Diffstat:
lib/c/src/Makefile | 1+
lib/c/src/fread.c | 23+++++++++++++++++++++++
lib/c/src/fwrite.c | 23+++++++++++++++++++++++
3 files changed, 47 insertions(+), 0 deletions(-)

diff --git a/lib/c/src/Makefile b/lib/c/src/Makefile @@ -12,6 +12,7 @@ OBJ = assert.o strcpy.o strcmp.o strlen.o strchr.o \ localeconv.o atoi.o atol.o atoll.o atexit.o exit.o \ printf.o fprintf.o vfprintf.o \ fgets.o gets.of fgetc.o fputc.o getchar.o putchar.o \ + fread.o fwrite.o \ realloc.o calloc.o malloc.o all: $(ARCH)-libc.a diff --git a/lib/c/src/fread.c b/lib/c/src/fread.c @@ -0,0 +1,23 @@ + +#include <stdio.h> +#undef fread + +size_t +fread(void * restrict ptr, size_t size, size_t nmemb, + FILE * restrict fp) +{ + unsigned char *bp = ptr; + size_t n, i; + + if (nmemb == 0 || size == 0) + return 0; + + for (n = 0; n < nmemb; n++) { + for (i = 0; i < size; ++i) { + if ((*bp++ = getc(fp)) == EOF) + return n; + } + } + + return n; +} diff --git a/lib/c/src/fwrite.c b/lib/c/src/fwrite.c @@ -0,0 +1,23 @@ + +#include <stdio.h> +#undef fwrite + +size_t +fwrite(const void * restrict ptr, size_t size, size_t nmemb, + FILE * restrict fp) +{ + const unsigned char *bp = ptr; + size_t n, i; + + if (nmemb == 0 || size == 0) + return 0; + + for (n = 0; n < nmemb; n++) { + for (i = 0; i < size; ++i) { + if (putc(*bp++, fp) == EOF) + return n; + } + } + + return n; +}