rdflib.c
资源名称:nasm-0.98.zip [点击查看]
上传用户:yuppie_zhu
上传日期:2007-01-08
资源大小:535k
文件大小:5k
源码类别:
编译器/解释器
开发平台:
C/C++
- /* rdflib - manipulate RDOFF library files (.rdl) */
- /* an rdoff library is simply a sequence of RDOFF object files, each
- preceded by the name of the module, an ASCII string of up to 255
- characters, terminated by a zero. There may be an optional
- directory placed on the end of the file. The format of the
- directory will be 'RDL' followed by a version number, followed by
- the length of the directory, and then the directory, the format of
- which has not yet been designed. */
- #include <stdio.h>
- #include <errno.h>
- #include <string.h>
- /* functions supported:
- create a library (no extra operands required)
- add a module from a library (requires filename and name to give mod.)
- remove a module from a library (requires given name)
- extract a module from the library (requires given name and filename)
- list modules */
- const char *usage =
- "usage:n"
- " rdflib x libname [extra operands]nn"
- " where x is one of:n"
- " c - create libraryn"
- " a - add module (operands = filename module-name)n"
- " r - remove (module-name)n"
- " x - extract (module-name filename)n"
- " t - listn";
- char **_argv;
- #define _ENDIANNESS 0 /* 0 for little, 1 for big */
- static void longtolocal(long * l)
- {
- #if _ENDIANNESS
- unsigned char t;
- unsigned char * p = (unsigned char *) l;
- t = p[0];
- p[0] = p[3];
- p[3] = t;
- t = p[1];
- p[1] = p[2];
- p[2] = p[1];
- #endif
- }
- void copybytes(FILE *fp, FILE *fp2, int n)
- {
- int i,t;
- for (i = 0 ; i < n; i++ )
- {
- t = fgetc(fp);
- if (t == EOF)
- {
- fprintf(stderr,"ldrdf: premature end of file in '%s'n",
- _argv[2]);
- exit(1);
- }
- if (fp2)
- if (fputc(t, fp2) == EOF)
- {
- fprintf(stderr,"ldrdf: write errorn");
- exit(1);
- }
- }
- }
- long copylong(FILE *fp, FILE *fp2)
- {
- long l;
- int i,t;
- unsigned char * p = (unsigned char *) &l;
- for (i = 0 ; i < 4; i++ ) /* skip magic no */
- {
- t = fgetc(fp);
- if (t == EOF)
- {
- fprintf(stderr,"ldrdf: premature end of file in '%s'n",
- _argv[2]);
- exit(1);
- }
- if (fp2)
- if (fputc(t, fp2) == EOF)
- {
- fprintf(stderr,"ldrdf: write errorn");
- exit(1);
- }
- *p++ = t;
- }
- longtolocal (&l);
- return l;
- }
- int main(int argc, char **argv)
- {
- FILE *fp, *fp2;
- char *p, buf[256];
- int i;
- _argv = argv;
- if (argc < 3 || !strncmp(argv[1],"-h",2) || !strncmp(argv[1],"--h",3))
- {
- printf(usage);
- exit(1);
- }
- switch(argv[1][0])
- {
- case 'c': /* create library */
- fp = fopen(argv[2],"wb");
- if (! fp) {
- fprintf(stderr,"ldrdf: could not open '%s'n",argv[2]);
- perror("ldrdf");
- exit(1);
- }
- fclose(fp);
- break;
- case 'a': /* add module */
- if (argc < 5) {
- fprintf(stderr,"ldrdf: required parameter missingn");
- exit(1);
- }
- fp = fopen(argv[2],"ab");
- if (! fp)
- {
- fprintf(stderr,"ldrdf: could not open '%s'n",argv[2]);
- perror("ldrdf");
- exit(1);
- }
- fp2 = fopen(argv[3],"rb");
- if (! fp)
- {
- fprintf(stderr,"ldrdf: could not open '%s'n",argv[3]);
- perror("ldrdf");
- exit(1);
- }
- p = argv[4];
- do {
- if ( fputc(*p,fp) == EOF ) {
- fprintf(stderr,"ldrdf: write errorn");
- exit(1);
- }
- } while (*p++);
- while (! feof (fp2) ) {
- i = fgetc (fp2);
- if (i == EOF) {
- break;
- }
- if ( fputc(i, fp) == EOF ) {
- fprintf(stderr,"ldrdf: write errorn");
- exit(1);
- }
- }
- fclose(fp2);
- fclose(fp);
- break;
- case 'x':
- if (argc < 5) {
- fprintf(stderr,"ldrdf: required parameter missingn");
- exit(1);
- }
- fp = fopen(argv[2],"rb");
- if (! fp)
- {
- fprintf(stderr,"ldrdf: could not open '%s'n",argv[2]);
- perror("ldrdf");
- exit(1);
- }
- fp2 = NULL;
- while (! feof(fp) ) {
- /* read name */
- p = buf;
- while( ( *(p++) = (char) fgetc(fp) ) )
- if (feof(fp)) break;
- if (feof(fp)) break;
- /* check against desired name */
- if (! strcmp(buf,argv[3]) )
- {
- fp2 = fopen(argv[4],"wb");
- if (! fp2)
- {
- fprintf(stderr,"ldrdf: could not open '%s'n", argv[4]);
- perror("ldrdf");
- exit(1);
- }
- }
- else
- fp2 = NULL;
- /* step over the RDOFF file, copying it if fp2 != NULL */
- copybytes(fp,fp2,6); /* magic number */
- copybytes(fp,fp2, copylong(fp,fp2)); /* header */
- copybytes(fp,fp2, copylong(fp,fp2)); /* text */
- copybytes(fp,fp2, copylong(fp,fp2)); /* data */
- if (fp2)
- break;
- }
- fclose(fp);
- if (fp2)
- fclose(fp2);
- else
- {
- fprintf(stderr,"ldrdf: module '%s' not found in '%s'n",
- argv[3],argv[2]);
- exit(1);
- }
- break;
- default:
- fprintf(stderr,"ldrdf: command '%c' not recognisedn",
- argv[1][0]);
- exit(1);
- }
- return 0;
- }