scc

simple C compiler
git clone git://git.2f30.org/scc
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commit 9f9ec428a8a5857cf0d1a5d00ed5d3533d535b11
parent 5e82a4f6e2a6beb00682e148ab5d7da555c9aa87
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Thu, 23 Nov 2017 23:15:22 +0100

[nm] Add nm() function

This function is going to be the core of the program. At this moment
it does almost nothing, but at least it opens the file.

Diffstat:
nm/main.c | 34+++++++++++++++++++++++++++++-----
1 file changed, 29 insertions(+), 5 deletions(-)

diff --git a/nm/main.c b/nm/main.c @@ -1,17 +1,38 @@ static char sccsid[] = "@(#) ./nm/main.c"; +#include <errno.h> #include <stdio.h> #include <stdlib.h> +#include <string.h> #include "../inc/arg.h" #include "../inc/scc.h" +#include "../inc/myro.h" char *argv0; +int radix = 16; + +void +nm(char *fname) +{ + FILE *fp; + struct myrohdr hdr; + + if ((fp = fopen(fname, "rb")) == NULL) + goto file_error; + if (readhdr(fp, &hdr) == EOF) + goto file_error; + if (strncmp(hdr.magic, MYROMAGIC, MYROMAGIC_SIZ)) + die("nm: %s: File format not recognized", fname); + +file_error: + die("nm: %s: %s", fname, strerror(errno)); +} void usage(void) { - fputs("nm [-APv][-efox][ -g| -u][-t format] file...\n", stderr); + fputs("nm [-APv][ -g| -u][-t format] file...\n", stderr); exit(1); } @@ -20,18 +41,21 @@ main(int argc, char *argv[]) { ARGBEGIN { case 'A': - case 'e': - case 'f': case 'g': - case 'o': case 'u': case 'v': - case 'x': /* case 't': */ ; default: usage(); } ARGEND + if (argc == 0) { + nm("a.out"); + } else { + while (argc-- > 0) + nm(*++argv); + } + return 0; }