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A prototype for error handling

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Wolfgang (Blub) Bumiller 2012-06-27 15:34:26 +02:00
parent e761f1f7b7
commit 8ce0548ad5
1 changed files with 22 additions and 6 deletions
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28
exec.c
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@ -1,7 +1,21 @@
#include <errno.h>
#include <string.h>
#include <stdarg.h>
#include "gmqcc.h" #include "gmqcc.h"
#include "exec.h" #include "exec.h"
static void loaderror(const char *fmt, ...)
{
int err = errno;
va_list ap;
va_start(ap, fmt);
vprintf(fmt, ap);
va_end(ap);
printf(": %s\n", strerror(err));
}
qc_program* prog_load(const char *filename) qc_program* prog_load(const char *filename)
{ {
qc_program *prog; qc_program *prog;
@ -13,14 +27,13 @@ qc_program* prog_load(const char *filename)
return NULL; return NULL;
if (fread(&header, sizeof(header), 1, file) != 1) { if (fread(&header, sizeof(header), 1, file) != 1) {
perror("read"); loaderror("failed to read header from '%s'", filename);
fclose(file); fclose(file);
return NULL; return NULL;
} }
if (header.version != 6) { if (header.version != 6) {
printf("header says this is a version %i progs, we need version 6\n", loaderror("header says this is a version %i progs, we need version 6\n", header.version);
header.version);
fclose(file); fclose(file);
return NULL; return NULL;
} }
@ -36,11 +49,14 @@ qc_program* prog_load(const char *filename)
prog->entityfields = header.entfield; prog->entityfields = header.entfield;
prog->filename = util_strdup(filename); prog->filename = util_strdup(filename);
if (!prog->filename) if (!prog->filename) {
loaderror("failed to store program name");
goto error; goto error;
}
#define read_data(hdrvar, progvar, type) \ #define read_data(hdrvar, progvar, type) \
if (fseek(file, header.hdrvar.offset, SEEK_SET) != 0) { \ if (fseek(file, header.hdrvar.offset, SEEK_SET) != 0) { \
perror("fseek"); \ loaderror("seek failed"); \
goto error; \ goto error; \
} \ } \
prog->progvar##_alloc = header.hdrvar.length; \ prog->progvar##_alloc = header.hdrvar.length; \
@ -50,7 +66,7 @@ qc_program* prog_load(const char *filename)
goto error; \ goto error; \
if (fread(prog->progvar, sizeof(*prog->progvar), header.hdrvar.length, file) \ if (fread(prog->progvar, sizeof(*prog->progvar), header.hdrvar.length, file) \
!= header.hdrvar.length) { \ != header.hdrvar.length) { \
perror("read"); \ loaderror("read failed"); \
goto error; \ goto error; \
} }
#define read_data1(x, y) read_data(x, x, y) #define read_data1(x, y) read_data(x, x, y)