85 lines
1.6 KiB
C
85 lines
1.6 KiB
C
/*to use exit*/
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#include <stdlib.h>
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/*to use *print**/
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#include <stdio.h>
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/*to user file2char*/
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#include "file2char.h"
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int convert_file2char(char const* path, char **buf){
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/*declarations*/
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FILE *fp;
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long lSize;
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/*TODO Check path for validity!*/
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/*fopen()
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*filename
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*mode
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*return: set errno value in error case
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*/
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fp=fopen(path,"r");
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if(fp){
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fprintf(stdout,"file opened.\n");
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/*set offset to file end*/
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/*fseek()
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*stream
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*offset
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*origin
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*/
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fseek(fp,0L,SEEK_END);
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if (ferror(fp)){
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printf ("Error seeking file\n");
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}
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/*get file size*/
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lSize = ftell( fp );
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fprintf(stdout,"lSize: %ld.\n",lSize);
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/*set offset to file start*/
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fseek(fp,0,SEEK_SET);
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if (ferror(fp)){
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printf ("Error seeking file\n");
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}
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/*allocate memory for entire content + null termination*/
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*buf=(char *)malloc((lSize+1)*sizeof(char));
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if(!*buf){
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fclose(fp);
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fputs("Error allocating memory",stderr);
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exit(EXIT_FAILURE);
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}
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fprintf(stdout,"mem allocated.\n");
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/*copy file into buffer*/
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/*fread()
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*ptr
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*size
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*count
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*stream
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*/
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if( 1!=fread(*buf,lSize,1,fp)){
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fclose(fp);
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free(*buf);
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fputs("Error reading entire file",stderr);
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exit(EXIT_FAILURE);
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}
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fprintf(stdout,"file read.\n");
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/*close file*/
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if(EOF==fclose(fp)){
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free(*buf);
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exit(EXIT_FAILURE);
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}
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fprintf(stdout,"file closed.\n");
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(*buf)[lSize] = '\0';
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fprintf(stdout,"mem null terminated.\n");
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}else{
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perror(path);
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exit(EXIT_FAILURE);
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}
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/*done*/
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return 0;
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}
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